Trauma

Question 1

What are the factors associated with poor outcome in calcaneus fractures

Answer 1

age > 60
obesity
manual labor
workers comp
smokers
bilateral calcaneal fxs
vasculopathies
men

Question 2

What are the factors that increase risk of requiring subtalar fusion

Answer 2

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Workers comp
Heavy labour
Bohler’s <20

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Question 3

what is the most frequent tarsal fracture

Answer 3

calcaneus

Question 4

What are the typical radiographic measurements of a calcaneus fracture

Answer 4

• Bohler angle (normal is 25-40 degrees)
  
  • flattening represents collapse of the posterior facet
  • drawn by connecting
    
    • anterior process
    • highest point on posterior articular surface
    • superior tuberosity
• Gissane angle (normal is 130-145 degrees)
  
  • an increase represents collapse of posterior facet
• Harris view
  
  • allows visualization of subtalar joint
  • comminution, degree of varus
  • l_oss of height_, widening, and impingement on peroneal space
  • take with foot maximally dorsiflexed and beam angled at 45 degrees
• Broden views
  
  • allows visualization of posterior facet
  • ankle internally rotated 40 degrees and ankle in neutral dorsiflexion. Views taken at 10, 20, 30, 40 degrees
  • largely replaced by CT scan

Question 5

What is the sander’s classification of calcaneus fractures

Answer 5

Question 6

What are indications for non-surgical treatment of a calcaenus fracture

Answer 6

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Cast immobilization with NWB for 10-12 weeks

Early ROM once swelling decreases, can start partial WB at 6 weeks if going well

• extra-articular fx with intact Achilles tendon and < 2mm displacement
• Sanders Type I (nondisplaced)
• comorbidities that preclude good surgical outcome (smoker, diabetes, PVD)
• Worker’s compensation (poorer outcomes)

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Question 7

What are options of surgical fixation of calcaneus fractures

Answer 7

• Goals of surgery
  
  • Return to function
  • Heel width/height
    
    • Can cause irritation on the peroneals
  • Ability to fit into shoe​
• CRPP
  
  • in tongue-type fxs or those with mild shortening
• ORIF after 5-10 days (when swelling gone)
  
  • indications
    
    • extra-articular fx with detachment of Achilles tendon and/or > 2mm displacement
    • Sanders Type II and III
  • techniques
    
    • no benefit to early surgery due to significant soft tissue swelling
    • wait until swelling/blisters resolves and wrinkle sign present (10-14 days )
    • Nothing to show that you need to use bone graft
    • Nothing to show that you need to lock it…nonunion rates are low
• primary subtalar arthrodesis
  
  • indicated in Sanders Type IV
  • technique
    
    • combined with ORIF to restore height
    • keep in mind that you can’t get compression across the joint

Question 8

What are the common complications with calcaneus ORIF?

Answer 8

• **Wound complications (10-25%) **
  
  • increased risk in smokers, diabetics, and open injuries
  • Keep hardware away from the corner of the incision
  • Initial treatment
    
    • Wound care, antibiotics, debridement as needed
  • Deep infect without union
    
    • Requires hardware removal
• **Subtalar post-traumatic arthritis **
  
  • 5% of patients post-op will require subtalar fusion
  • 20% of patients non-op will reqire subtalar fusion
  • Can try orthotics, supportive footware and cortisone injections first
• Compartment syndrome (10%)
  
  • results in clawing of the toes
  • insensate foot, chronic pain syndrome

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Question 9

What deformity can you get with calcaneal malunion?

Answer 9

• Heel widening
• Loss of height
• Calcaneocuboid impingement
• Varus Heel
• Post-traumatic Arthrosis

Question 10

What is the classification system for calcaneus malunion

Answer 10

Stevenson and saunders

• A, Type I malunion demonstrating a large lateral wall exostosis, no malalignment, and little or no subtalar arthrosis.
• B, Type II malunion demonstrating lateral wall exostosis, significant subtalar arthrosis, and varus malalignment ≤10°.
• C, Type III malunion is similar to type II but with varus malalignment >10°.
• D, Coronal CT scan demonstrating type III malunion

Question 11

What are associated with subtalar dislocations

Answer 11

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• **associated dislocations **
  
  • talonavicular
  • talocalcaneal
• **associated fractures **
  
  • with medial dislocation
    
    • dorsomedial talar head fx
    • posterior tubercles of talus fx
    • navicular fx
  • with lateral dislocation
    
    • cuboid fx
    • anterior calcaneus fx
    • lateral process of talus fx
    • fibula fx

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Question 12

What are the blocks to reduction of a subtalar dislocation

Answer 12

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medial dislocation - reduction blocked by

peroneal tendons
extensor digitorum brevis
talonavicular joint capsule

lateral dislocation - reduction blocked by

posterior tibialis tendon
flexor hallucis longus
flexor digitorum longus

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Question 13

What is the treatment of a subtalar dislocation?

Answer 13

Closed reduction

Open if unable to get closed

Cast/NWB for 4-6 weeks

Question 14

What is the long term risk of OA for subtalar dislocation

Answer 14

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ankle joint 89% (31% symptomatic)
subtalar joint 89% (63% symptomatic)
midfoot 72% (15% symptomatic)

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Question 15

What is the blood supply to the talus

Answer 15

• posterior tibial artery
  
  • via artery of tarsal canal (dominant supply)
  • supplies majority of talar body
• deltoid branch of posterior tibial artery
  
  • supplies medial portion of talar body
  • may be only remaining blood supply with a displaced fracture - a posteromedial appraoch would disrupt this, so if you need to, do a med mall osteotomy
• anterior tibial artery
  
  • suplies head and neck
• perforating peroneal arteries via artery of tarsal sinus
  
  • suplies head and neck

Question 16

What is the best view to assess the talar neck

Answer 16

canale view

• equinus
• 15 deg pro
• 75 deg cephalic tilt of image intensifier
• Don’t forget to also get a CT to assess comminution or other associated foot fractures

Question 17

What is the hawkins classification

Answer 17

• Hawkins I
  
  • Nondisplaced
  • 0-13% AVN
• Hawkins II
  
  • Subtalar dislocation
  • 20-50%
• Hawkins III
  
  • Subtalar and tibiotalar dislocation
  • 20-100%
• Hawkins IV
  
  • Subtalar, tibiotalar, and talonavicular dislocation
  • 70-100%

Question 18

What are the approaches and fixation generally used for a talar neck fracture

Answer 18

• can put a bump under the knee to help with flouro
• anteromedial
  
  • between tibialis anterior and posterior tibialis
  • preserve soft tissue attachments, especially deltoid
  • Can use a medial malleolar osteotomy if you need to get access without disrupting the deltoid artery
• anterolateral
  
  • between tibia and fibula proximally, in line with 4th ray
  • sharply incise the inferior retinaculum
  • elevate EDB
  • debride sinus tarsi and elevate extensor digitorum brevis - this is important to get your reduction, need an antomical reduction to prevent AVN
• Fixation
  
  • provisional anatomic reduction with k-wires
  • ​two lateral lag screws with a lateral minifrag plate is most common
    
    • can use a tricortical graft if there is medial comminution
  • retrograde fixation is biomechanicially stronger, but can’t get reduction, use posterolateral approach
  • medial plate can help with prevention of varus, but is hard to get access to, need to do osteotomy and keep plate low
• Post-op
  
  • ​NWB 10-12 week

Question 19

What is Hawkin’s sign

Answer 19

• subchondarl lucency in the talar dome best seen on AP
• 6-8 weeks
• evidence that there is vascularity, good sign
• Bad sign if you get relative sclerosis

Question 20

What are complications associated with talar neck fractures?

Answer 20

• Osteonecrosis
  
  • hawkins sign
    
    • subchondral lucency best seen on mortise Xray at 6-8 weeks
    • indicates intact vascularity with resorption of subchondral bone
  • associated with talar neck comminution and open fractures
• Posttraumatic arthritis
  
  • subtalar arthritis (50%)
    
    • most common complication
  • tibiotalar arthritis (33%)
• Varus malunion (25-30%)
  
  • can be prevented by anatomic reduction
  • treatment includes medial opening wedge osteotomy of talar neck
  • leads to
    
    • decreased subtalar eversion
    • decreased motion with locked midfoot and hindfoot
    • weight bearing on the lateral border of the foot

Question 21

What is the option for exposure if there is comminution of the talar body

Answer 21

Medial malleolus osteotomy

Question 22

What is your landmark to determine talar neck or talar body

Answer 22

lateral process

Question 23

What is your approach to lateral process fractures

Answer 23

• Snowboarder’s fracture
• Mechanism
  
  • dorsiflexion, axial loading, inversion, and external rotation
  • often misdiagnosed as ankle sprain
  • presents as ankle sprain that is not improving after 6 week
• Imaging
  
  • Radiographs - may be falsely negative
  • CT scan
    
    • should be performed when suspicion is high (snowboarder) and radiographs are negative
• Treatment
  
  • SLC for 6 weeks (NWB first 4 weeks)
    
    • indicated if nondisplaced (< 2mm)
  • ORIF/Kirshner wires via lateral approach
    
    • indicated if displaced (> 2mm)
  • Fragment excision
    
    • indicated if comminuted
    • incompetence of the lateral talocalcaneal ligament is expected with excision of a 1 cm fragment; no ankle or subtalar joint instability is created, however

Question 24

What is your approach to a posterior process fracture

Answer 24

• Often confused with os trigonum
• Radiographs or CT
• Treatment
  
  • Nondisplaced (< 2mm)
    
    • SLC for 6 weeks (NWB first 4 weeks)
  • Displaced (> 2mm)
    
    • Kirshner wires via posterolateral approach
  • Comminuted
    
    • excise

Question 25

What is your appraoch to AVN of the talus

Answer 25

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• highly controversial
• You can usually WB them as soon as you get fracture healing
  
  • Just because there is AVN doesn’t mean you won’t get healing
• Treat symptomatically with pain control
  
  • explain this may not help with ANV
  • Then follow with serial XR
• Blair fusion
  
  • Uses the remaining neck of the talus
• Others have described filling the void with graft and doing a TTC

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Question 26

What is your approach to ARDS

Answer 26

• Causes include
  
  • trauma
  • shock
  • infection
  • fat emboli
  • thromboembolism
  • multi-system organ failure
• Presentation
  
  • tachypmea, dyspnea, hypoxemia
  • decreased lung compliance
• Labs
  
  • diagosis after long bone fracture made with ABGs
• Imaging
  
  • diffuse infiltrative changes on CXR
• Treatment
  
  • ex-fix femur fracture and consult ICU for supportive care until clincial improvement
  • PEEP ventilation and steroids

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Question 27

What is your approach to fat emboli syndrome

Answer 27

• Etiology
  
  • Caused by release of fat and inflammatory mediators from the marrow of long bone fractures
• Presentation
  
  • Skin Rash
  • Confusion
  • Respiratory Distress
• Treatment
  
  • Fixation of long bone - or stabilizaiton with ex-fix
  • supportive care with positive pressure ventilation in ICU
  • In the acute situation the trauma of the guide wire can make them worse
  • Sometimes it’s better to put an ex-fix on, they will do better in the short term ICU stay, but requires another surgery
  • Can consider pelvic Ex-fix for femoral neck fractures

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Question 28

Diagnosis? Classification?

Answer 28

• AVN of the talus with associated sclerosis (taken 6-8 weeks post-op)
• Ficat classification

Question 29

Diagnosis?

Answer 29

Lisfranc injury - stress views can help make the diagnosis if the injury is low energy and subtle

Instability test - just for motion along this joint dorsal and volar, if volar ligaments are still intact and no dorsal dislocation can treat non-op

Question 30

This healthy patient had a fall from height onto a plantar-flexed foot. What are the key things you need to look for on XR?

Answer 30

five critical radiographic signs that indicate presence of midfoot instability

1. disruption of the continuity of a line drawn from the medial base of the second metatarsal to the medial side of the middle cuneiform (diagnostic of lisfranc)
2. widening of the interval between the first and second ray (may see a fleck sign diagnosic of lisfranc)
3. medial side of the base of the fourth metatarsal does not line up with medial side of cuboid on oblique view
4. metatarsal base dorsal subluxation on lateral view
5. disruption of the medial column line (line tangential to the medial aspect of the navicular and the medial cuneiform)

Don’t forget WB or stress veiws if you have concerns and there is nothing obvious on XR

Question 31

Inidcations for non-op treatment of Lisfranc?

Answer 31

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nonambulatory patients
presence of serious vascular disease
severe peripheral neuropathy
instability in only the transverse plane

If there is just boney invovlement with no evidence of ligamentous disruption or instaiblity you can treat it in a cast with start WB at 6 weeks (like any #)

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Question 32

What are the indications and surgical option for a lisfranc injury?

Answer 32

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timing

• ​usually wait 2 weeks to allow tissues to settle unless otherwise indicated
• ex-fix if very unstable
• **open reduction and rigid internal fixation **
  
  • indications
    
    • any evidence of instability (> 2mm shift)
    • favored in fracture-dislocations as opposed to purely ligamentous injuries
  • outcomes
    
    • anatomic reduction required for a good result
• primary arthrodesis of the first, second and third tarsometatarsal joints
  
  • indications
    
    • purely ligamentous arch injuries
• midfoot arthrodesis
  
  • indications
    
    • destabilization of the midfoot’s architecture with progressive arch collapse and forefoot abduction
    • chronic Lisfranc injuries that have led to advanced midfoot arthrosis and have failed conservative therapy

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Question 33

What is true about primary fusion in a lisfranc injury?

Answer 33

• level 1 evidence of arthrodesis over ORIF for purely liagmentous injury
  
  • equivalent functional outcomes
  • decreased rate of hardware removal
  • decreased rate of revision surger
• primary arthodesis is an alternative to ORIF in patients with any evidence of instability with possible benefits
• medial column tarsometatarsal fusion shown to be superior to combined medial and lateral column tarsometatarsal arthrodesis

Question 34

Complications associated with this injury?

Answer 34

• Arthritis
  
  • most common, treat with arthrodesis
• Nonuion
  
  • uncommon

Question 35

Post-op care for a lisfranc injury

Answer 35

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• early midfoot ROM, protected weight bearing, and hardware removal (k-wires in 6-8 weeks, screws in 3-6 months)
• gradually advance to full weight bearing at 8-10 weeks
• if patient is asymptomatic and screws transfix only first through third TMT joints, they may be left in place
• preclude return to vigorous athletic activities for 9 to 12 months

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Question 36

Diagnosis and Treatment?

Answer 36

• Chopart joint dislocation
  
  • ​get stress views if worried (MVA/brake)
• ​Treatment​
  
  • ​pins TN 6-8 weeks
  • pins CC 12 weeks
  • NWB 12 weeks

Question 37

Ways to assess length of fibula

Answer 37

• Shenton’s line - should be equal space around talus on mortis
• Dime Sign - assess’s length of fibula
• Talocrural Angle - 81 degrees, short lateral malleloi will increase talocrural angle
  
  • need an XR of the contralateral ankle to do this

Question 38

Radiological features to assess the syndesmosis

Answer 38

• Most important in OR is to visualize the syndesmosis
• Assess 1cm above joint line
  
  • Should be overlap of tib-fib on mortis
  • Overlap > 10mm on AP
  • has been reported that this has no correlation
• ER/abduction stress test with dorsiflexion
  
  • better than other medial mall tenderness or ecchymosisis
  • Should be done in OR
  • Manual=stress

Question 39

Lauge-Hansen Classficiation

Answer 39

• SAD (Supination-Adduction)
  
  • ATFL sprain or distal fibular avulsion
  • Verticle medial malleolus
• SER (Supination-External Rotation)
  
  • ATFL Sprain
  • A-P oblique fibula fracture
  • PTFL or posterior malleolus avulsion
  • Medial Mall transverse fracture (or deltoid)
• PAD (Pronation-Abduction)
  
  • Medial Mall transverse fracture (or deltoid)
  • ATFL sprain
  • Comminuted fibula fracture (above syndesmosis)
• PER (Pronation-External Rotation)
  
  • Medial Mall transverse fracture (or deltoid)
  • ATFL
  • Oblique or spiral fibular fracture (above joint)
  • PTFL or posterior malleolus

Question 40

Approach to this injury

Answer 40

• Nonoperative
  
  • short-leg walking cast/boot
  • indications
    
    • isolated nondisplaced medial malleolus fracture or tip avulsions
    • isolated lateral malleolus fracture with < 3mm displacement and no talar shift
    • posterior malleolar fracture with < 25% joint involvement or < 2mm step-off
• Operative
  
  • open reduction internal fixation
    
    • indications
      
      • any talar displacement
      • displaced isolated medial malleolar fracture
      • displaced isolated lateral malleolar fracture
      • bimalleolar fracture and bimalleolar-equivalent fracture
      • posterior malleolar fracture with > 25% or > 2mm step-off [q]
      • Bosworth fracture-dislocations
      • open fractures
  • technique
    
    • goal of treatment is stable anatomic reduction of talus in the ankle mortise
    • 1 mm shift of talus leads to 42% decrease in tibiotalar contact area
    • overall success rate of 90%
    • prolonged recovery expected (2 years to obtain final functional result)
    • significant functional impairment often noted
• ORIF superior to closed treatment of bimalleolar fractures

Question 41

Braking time after injury

Answer 41

• returns to baseline at nine weeks for operatively treated ankle fractures
• braking travel time is significantly reduced until 6 weeks after initiation of weight bearing in both long bone and periarticular fractures of the lower extremity

Question 42

Prognositc factors in ankle fractures

Answer 42

worse outcomes with:

smoking
decreased education
alcohol use
increased age
presence of medial malleolar fracture

Question 43

Injury type? Outcomes?

Answer 43

supination-adduction fractures

restoration of marginal impaction of the anteromedial tibial plafond leads to optimal functional results after surgery

Use a lag screw on the fibular and an antiglide plate on the tibia

Question 44

Indications for surgery and plate choices and reasons for this fracture

Answer 44

• Indications for surgery
  
  • ​>3mm displacement
  • talar shift
  • syndesmosis injury
• lateral
  
  • lag screw fixation with neutralization plating
  • bridge plate technique
    
    • ​comminution
  • posterior antiglide technique
    
    • peroneal irritation (distal plate)
    • biomechanically superior
  • lag screw fixation with neutralization plating

Question 45

Approach to posteior malleolus fracture

Answer 45

• indications for fixation
  
  • > 25% of articular surface involved
  • > 2 mm articular stepoff
  • syndesmosis injury
• approach
  
  • posterolateral approach
  • posteromedial approach
  • decision of approach will depend on fracture lines and need for fibular fixation
• fixation
  
  • anterior to posterior lag screws to capture fragment (if nondisplaced)
  • posterior to anterior lag screw and buttress plate
  • antiglide plate
• syndesmosis injury
  
  • stiffness of syndesmosis 70% versus 40% with isolated syndesmosis fixation
  • stress examination of syndesmosis still required after posterior malleolar fixation

Question 46

Approach to syndesmosis injury

Answer 46

• **Overview **
  
  • suspect injury in all ankle fractures
  • most common in _Weber C _fracture patterns
  • fixation usually not required when fibula fracture within 4.5 cm of plafond
  • up to 25% of tibial shaft fractures will have ankle injury
• Evaluation
  
  • measure clear space 1 cm above joint
  • it has also been reported that there is no actual correlation between syndesmotic injury and tibiofibular clear space or overlap measurements
  • lateral stress radiograph has more interobserver reliability than an AP/mortise stress film - best to do in OR
  • instability of the syndesmosis is greatest in the _anterior-posterior direction _
• **Treatment **
  
  • operative
    
    • syndesmotic screw fixation
      
      • indications
        
        • widening of medial clear space
        • tibiofibular clear space (AP) greater than 5 mm
        • tibiofibular overlap (mortise) narrowed
        • any postoperative malalignment or widening should be treated with open debridement, reduction, and fixation
      • technique
        
        • length and rotation of fibula must be accurately restored.
          
          • “Dime sign”/Shentons line to determine length of fibula
        • open reduction required if closed reduction unsuccessful or questionable
    • one or two cortical screw(s) 2-4 cm above joint, angled posterior to anterior 20-30 degrees
  • maximum dorsiflexion of ankle not required during screw placement (can’t overtighten a properly reduced syndesmosis)
• postoperative
  
  • screws should be maintained in place for at least 8-12 weeks
  • must remain non-weight bearing, as screws are not biomechanically strong enough to withstand forces of ambulation
• **controversies **
  
  • _number of screws _
    
    • 1 or 2 most commonly reported
  • _number of cortices _
    
    • 3 or 4 most commonly reported
  • _size of screws _
    
    • 3.5 mm or 4.5 mm screws
  • implant material (stainless steel screws, titanium screws, suture, bioabsorbable materials)
  • _need for hardware removal _
    
    • no difference in outcomes seen with hardware maintenance (breakage or loosening) or removal at 1 year

Question 47

You perform this procedure. What are the complications?

Answer 47

• Wound problems (4-5%)
• Deep infections (1-2%)
  
  • up to 20% in diabetic patients
  • largest risk factor for diabetic patients is presence of peripheral neuropathy
• Post-traumatic arthritis
  
  • rare with anatomic reduction and fixation
  • corrective osteotomy requires anatomic fibular and mortise correction for optimal outcomes

Question 48

Measures of adequate resusitation

Answer 48

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• MAP > 60
• HR < 100
• urine output 0.5-1.0 ml/kg/hr (30 cc/hr)
• serum lactate levels
  
  • most sensitive indicator as to whether some circulatory beds remain inadequately perfused (normal < 2 mmol/L)
• gastric mucosal ph
• base deficit
  
  • normal -2 to +2
• pH < 7.24

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Question 49

Classes of shock

Answer 49

Question 50

Diagnosis? Classification? Indications/Options for surgery?

Answer 50

Radial Head Fracture

• Physical
  
  • check ROM
    
    • 30-130 flex-ex
    • 45-45 sup-pro
  • check the pin
• Imaging
  
  • ​can get a greenspan view to help assess
    
    • 45 deg oblique center over the RC joint
  • CT
• Classification - Mason Allen
  
  • Type 1 - nondisplaced
  • Type II - partial head fx
  • Type III - complete head
  • Type IV - radial head fx with elbow dislocatoin
• short period of immobilization followed by early ROM
  
  • Nondisplaced, stable (30-130)
  • no mechanical block
  • complications
    
    • nonunion
      
      • new studies have shown a higher rate of nonunion in nonoperative managmeent than previously expected
• ORIF
  
  • Indications
    
    • Simple fracture
    • < 3 fragments
    • Mechanical block
  • technique
    
    • plate in safe zone
    • countersink screws in articular surface
• Fragment Excision (partial excision)
  
  • indicated if fragment < 1/3 of head
  • Cannot be a part of the PRUJ
  • complications
    
    • even small fragment excision may lead to instability
• radial head replacement
  
  • indications
    
    • for comminuted fracture with 3 or more fragments
  • complications
    
    • overstuffing of joint that leads to capitellar wear problems and malalignment instability
• radial head resection
  
  • indications
    
    • older patients with limited demands
    • in a delayed setting for continued pain of an isolated radial head fracture
  • contraindications
    
    • forearm ligament injury (identify with radius pull test)
    • coronoid fracture
    • MCL deficiency
  • complications
    
    • muscle weakness
    • wrist pain
    • valgus elbow instability
    • heterotopic ossification
    • arthritis

Question 51

When would you consider radial head excision? What are the complications?

Answer 51

• indications
  
  • older patients with limited demands
  • in a delayed setting for continued pain of an isolated radial head fracture
• contraindications
  
  • forearm ligament injury (identify with radius pull test)
  • coronoid fracture
  • MCL deficiency
• complications
  
  • muscle weakness
  • wrist pain
    
    • proximal migration of radius leads to ulanr positive variance and ulnocarpal abutment
  • valgus elbow instability
  • heterotopic ossification
  • arthritis

Question 52

Other indications for radial head arthroplasty? How can you size the head?

Answer 52

• Indications
  
  • comminuted radial head fracture
  • nonunion/maluion
  • instabilty (essex-lopraseti)
  • rheumatoid or osteoarthritis
  • tumour
• ​Modular metallic head
  
  • ​allows you to size the canal
  • then size the radial head
• ​Sizing the radial head​
  
  • Size the contralateral joint
  • Size to original radial head - thickness and cup
  • Trial reduction
    
    • Proximally should line up with less sigmoid notch
    • Lateral UH joint are opposed
  • Flouro
    
    • Medial and lateral UH joint lines (can’t see this until >6mm)
    • Look for congruency of the medial UH joint

Question 53

Approach to radial head arthroplasty

Answer 53

• Approach for Surgery
  
  • ​kocher will allow you to see LUCL
  • EDC split will all you to see more anterior
  • Arm held in pronation to protect the PIN, 2.6cm distal to the RC joint
• indications
  
  • for comminuted fracture with 3 or more fragments
  • technique include two type of metal prosthesis, both are in use
    
    • loose stemmed prosthesis that acts as a stiff spacer
    • bipolar prosthesis that is cemented into the neck of the radius
    • silicon replacements are no longer used
• Sizing radial head
  
  • Size the contralateral head pre-op
  • Size to original radial head - thickness and cup
  • Trial reduction
    
    • Proximally should line up with less sigmoid notch
    • Lateral UH joint are opposed
  • Flouro
    
    • Medial and lateral UH joint lines (can’t see this until >6mm)
    • Look for congruency of the medial UH joint
• complications
  
  • overstuffing of joint that leads to capitellar wear problems and malalignment instability

Question 54

Describe mechanism of proximal tib-fib dislocation. Features on exam, reduction mechanism and treatment?

Answer 54

• Mechanism: Twisting of flexed knee (athletic injury)
• Physical Exam:
  
  • Prominent lateral mass
  • Pain worse with ankle DF (proximal fibular migration)
  • Pain worse with knee extension
  • Examine stability at 90 degrees (relaxes LCL)
  • Translation of prox fibula
  • Peroneal nerve
  • Ankle exam
  • LCL and PLC instability to rule out other injuries
• Closed Reduction:
  
  • Flex btw 80-110 to relax LCL
  • Reduce opposite direction of dislocation
  • immobilize for 3 weeks (controversial)
• Open Reduction:
  
  • Screw with repair of joint capsule
  • immobilize for 6 weeks
  • ​remove in 12 weeks
• Chronic Dislocation
  
  • ​usually non-op with activity modificaiton and strap
  • arthrodesis with mid-fibular resection is an option in older patients
  • attempts have been made to use the IT or biceps to create a sling for the head of the fibula
• Results are improved with LCL/PLC pathology and repair

Note that actue and chronic entities are two seperate issues and should be treated differented. The IT band can be use

Question 55

What are the forces acting on this fracture? What is the classification? Options for treatment?

Answer 55

Subtrochanteric fracture

• 5cm distal to LT
• high non-union rate
• Deforming forces
  
  • ​abduction (abductors)
  • flexion (iliopsoas)
  • external rotation (short ERs)
• Russel-Taylor
  
  • Type I - no extension into piriformis fossa
  • Type II - extension into greater trochanter with involvement of piriformis fossa
    
    • look on lateral xray to identify piriformis fossa extension
• ​​Treatment
  
  • ​intramedullary nailing (usually cephalomedullary)
    
    • historically Russel-Taylor type I fractures
    • newer design of intramedullary nails has expanded indications
    • most subtrochanteric fractures treated with IM nail
    • Techniques
      
      • 1st generation nail (rarely used)
      • 2nd generation reconstruction nail
      • cephalomedullary nail
        
        • trochanteric or piriformis entry portal
        • piriformis nail may mitigate risk of iatrogenic malreduction from proximal valgus bend of trochanteric entry nail
      • pros
        
        • preserves vascularity
        • load-sharing implant
        • stronger construct in unstable fracture patterns
      • cons
        
        • reduction technically difficult
        • nail can not be used to aid reduction
        • fracture must be reduced prior to and during passage of nail
        • may require percutaneous reduction aids or open clamp placement to achieve and maintain reduction
        • mismatch of the radius of curvature
          
          • nails with a larger radius of curvature (straighter) can lead to perforation of the anterior cortex of the distal femur
  • fixed angle plate
    
    • surgeon preference
    • associated femoral neck fracture
    • narrow medullary canal
    • pre-existing femoral shaft deformity
    • approach
      
      • lateral approach to proximal femur
      • may split or elevate vastus lateralis off later intermuscular septum
      • dangers include perforating branches of profunda femoris
    • technique
      
      • 95 degree blade plate or condylar screw
      • sliding hip screw is contraindicated due to high rate of malunion and failure
      • blade plate may function as a tension band construct
        
        • femur eccentrically loaded with tensile force on the lateral cortex converted to compressive force on medial cortex
    • cons
      
      • compromise vascularity of fragments
      • inferior strength in unstable fracture patterns

Question 56

Diagnosis?

Answer 56

Bisphosphanate fracture

lateral cortical thickening
transverse fracture orientation
medial beaking
lack of comminution

stenotic canal

Question 57

What are the options for positioning of this fracture?

Answer 57

• lateral positioning
  
  • advantages
    
    • allows for easier reduction of the distal fragment to the flexed proximal fragment
    • allows for easier access to entry portal, especially for piriformis nail
• Fracture tablw
  
  • advantages
    
    • protective to the injured spine
    • address other injuries in polytrauma patients
    • easier to assess rotation

Question 58

How to get reduction and assess reduction in a subtroch fracture

Answer 58

• Acceptable reduction
  
  • ​strive for perfect
  • <10 deg varus
  • 1cm shortening
  • <15 deg of rotation
• ​Reduction techniques
  
  • Ensure start point is at the tip of the GT or slightly medial (NOT LATERAL)
    
    • piriformis start site might be better
  • ​Closed
    
    • ​traction, bumps and towels
    • sharp reduction forcep, spikes, pushers, bone clamps
    • ER of the leg
  • ​Open
    
    • ​clamps, cirlage wires
    • Stimen pins/joystick

Question 59

Complications associated with subtroch fractures

Answer 59

**Varus/ procurvatum malunion **

the most frequent intraoperative complication with antegrade nailing of a subtrochanteric femur fracture is varus and procurvatum (or flexion) malreduction

**Nonunion **

can be treated with plating

Question 60

4 long term complications of radial head fracture in adults

Answer 60

• Elbow stiffness
  
  • reasons to transpose the nerve when you do your release
    
    • < 90 deg arc
    • if releasing > 30 deg arc
• Heterotopic Ossification
  
  • Concurrent injury
  • Recurrent surgery
  • Delay to surgery
  • Prolonged immobilization
• PIN Palsy
• Ulnar nerve injury
• Infection
• Instability
• Elbow OA
• Fracture displacement

Question 61

What is the triad of death?

Answer 61

blood loss

coagulopathy

hypothermia

Question 62

What are clinical parameters to help determine a borderline patient?

Answer 62

• Clinical parameters of a borderline patient
  
  • ISS >40
  • Multiple injuries (ISS >20) in association with thoracic trauma (AIS >2)
  • Multiple injuries in association with severe abdominal or pelvic injury and hemorrhagic shock at presentation (systolic blood pressure <90 mm Hg)
  • Bilateral femoral fractures
  • Radiographic evidence of pulmonary contusion
  • Hypothermia (temperature <35°C [95°F])
  • Additional moderate or severe head injuries (AIS ≥3)

Question 63

What are the parameters that are looked at when deciding DCO vs ETO

Answer 63

Blood pressure (mm Hg)

Blood units given in a 2-hr period

Lactate levels (mg/dL)

Base deficit level (mmol/L)

ATLS classification

Platelet count

Factor II and V (%)

Fibrinogen (g/L) D-dimer (μg/mL)

Temperature °C (°F)

Lung function (Pao2/Fio2 [mm Hg])

Chest trauma scores (AIS)

Chest trauma score (thoracic trauma severity score)

Abdominal trauma (Moore classifi- cation)

Pelvic trauma (AO classification)

External Injury (abraision, crush, burn)

Question 64

Approach to ATLS

Answer 64

• 2 large bore IV’s, O2, monitors, c-collar and spinal precautions
  
  • ​call for imaging
• Airway
  
  • includes cervical spine control
  • Introduce yourself, ask their name
  • Assess for any obvious facial trauma
• Breathing
  
  • O2 sats, resp rate
  • Look for bruising, chest movement
  • Listen to the lungs
  • Things that can kill them
    
    • Hemothorax - decreased sounds on one side
    • Tension Penumo - decreased sounds, tachy, low BP, trach deviation
• Circulation
  
  • BP, listen to chest
  • includes hemorrhage control and resuscitation (below)
  • pregnant women should be placed in the left lateral decubitus position to limit positional hypotension
  • Things that can kill them
    
    • Hemorrahage
    • Cover bleeding wounds, give antibiotics
    • Cardiac Tamponade
      
      • Muffled heart sounds, low BP, JVP distension (Beck’s triade)
    • assess stability of the pevlis in the rotational and vertical plane
• Disability - GCS
• Exposure
  
  • exposue while preventing hypothermia
• Once they are stable, reassess vitals
• Ask for initial blood work
• Foley, NG tube
• CXR, Pelvic XR, C-spine XR
• Then proceed to secondary survery
• Examine head, eyes, facial trauma
• Examine c-spine while maintaining precations, logroll the patient to assess back and do a rectal
• Examine all upper extremity joints
• Chest for trauma, abdo exam, FAST
• Pelvis - put on a binder if unstable
• Examine lower extremity joints
• Log roll, rectal exam
• Reduce fractures as needed, keep patient warm
• Check imaging, repeat blood work
  
  • Make sure imaging is adequate
• ​CT chest, abdo pelvis
  
  • ​spine, head
• Call appropriate services

Question 65

What are indications for ampuation

Answer 65

Number one indication is the degree of ispsilateral soft tissue injury

• Indications for amputation (LEAP)
  
  • Warm ischemia > 6 hours
  • Tibial nerve disruption with crush
  • OR two of the following
    
    • serious poly- trauma
    • severe injury of the ipsilateral foot
  • anticipation of a protracted course to obtain soft-tissue coverage and tibial reconstruction
• 7 considerations
  
  • Severe Open Tibia with a Mangled Foot (foot not salvageable)
  • Massive Non-reconstructable soft tissue loss
  • Warm Ischemia Time > 6-8 hours
  • Patient with multiple medical comorbities – elderly, renal failure, DM – unable to undergo multiple surgeries
  • Medically unstable patient
  • Rapid progressive infection of the limb in a septic patient
  • IIIB or IIIC with confirmation of lacerated Tibial Nerve
• LEAP
  
  • No difference in outcomes comparing amputation to reconstruction
  • Higher risk of re-admission, complications and longer time to recovery with reconstruction
  • If the patient is at high risk for amputation it’s better to do it earlier

Question 66

What is the complete gustilo classification

Answer 66

<!--StartFragment-->

• Grade 1
  
  • skin lesion < 1 cm
  • clean
  • simple bone fracture with minimal comminution
• Grade 2
  
  • skin lesion > 1 cm
  • no extensive soft tissue damage
  • minimal crushing
  • moderate comminution and contamination
• Grade 3
  
  • Extensive skin damage with muscle and neurovascular involvement AND/OR
  • High-speed crush injury
  • Segmental or highly comminuted fracture
  • Segmental diaphyseal loss
  • Wound from high velocity weapon
  • Extensive contamination of the wound bed
  • Any size open injury with farm contamination
• A
  
  • Extensive laceration of soft tissues with bone fragments covered
  • usually high-speed traumas with severe comminution or segmental fractures
• B
  
  • Extensive lesion of soft tissues with periosteal stripping and contamination
  • severe comminution due to high-speed traumas
  • usually requires replacement of exposed bone with a local or free flap as a cover
• C
  
  • Exposed fracture with arterial damage that requires repair

<!--EndFragment-->

Question 67

What is the criteria of SIRS

Answer 67

<!--StartFragment-->

• Heart rate > 90 beats/min
• WBC count less than 4000 cells/mm³ OR greater than 12,000 cells/mm³
• Respiratory rate > 20 or PaCO2 < 32mm (4.3kPa)
• Temperature less than 36 degrees or greater than 38 degrees

<!--EndFragment-->

Question 68

Approach to an irreducible talus

Answer 68

• Attempt in emerg
• Stimen pin in the calcaneus
• femoral distractor
  
  • two small pins in each segment
• medial malleolar osteotomy is your open approach

Question 69

What are the risk factors for radioulnar synostosis

Answer 69

<!--StartFragment-->

• trauma related
  
  • Monteggia fracture
  • both bone forearm fractures at the same level
  • open fracture,
  • significant soft-tissue lesion
  • comminuted fracture
  • high energy fracture
  • associated head trauma
  • bone fragments on the interosseous membrane
• treatment related
  
  • use of one incision for both radius and ulna
  • delayed surgery > 2 weeks
  • screws that penetrate interosseous membrane
  • bone grafting into interosseous membrane
  • prolonged immobilization

<!--EndFragment-->

Question 70

Diagnosis? Management?

Answer 70

Radioulnar Synostosis

• History
  
  • previous trauma or surgery in forearm
  • Take a complete history of the circumstances of the break and associated risk factors
  • Pain
    
    • pain with incomplete synostosis
    • no pain with complete synostosis
• Physical exam
  
  • pronation and supination blocked both actively and passively
  • Limited supnation is more limiting
  • Usually ned 45/45
• Radiographs
  
  • recommended views
    
    • AP and lateral of forearm, elbow, and wrist
  • bony bridge between radius and ulna
• CT to help clarify location
• Historically people would get bone scan, but this is no longer recommended
• No longer need to wait until maturation, this only causes further atrophy and weakness
• surgical resection of synostosis
  
  • indications
    
    • post-traumatic synostosis that impairs function
  • excision indicated at 4-6 months
  • Approaches
    
    • Distal - ECU/FCU, watch for ulnar nerve
    • Middle - Henry approach
    • Proximal - boyd
  • Interposition
    
    • fascia lata is best
    • Fat not recommended, but should be used other than nothing
    • If not comfortable can use bone wax or gelfoam
  • Adjunt
    
    • Proximal radial head excision
    • Darrach, sauve kapanji
    • Some authors have tried TEA with variable success, but this is not routinely recommended due to limited function and complications
• Small cases series of proximal radius resection distal to synostosis - rehab with brace
  
  • Contraindicated with essex-lopreseti lesion
• Post-op
  
  • Nighttime splinting alternating sup/pro
  • Aggressive PT, strength starting at 6 weeks
• Recurrence/Prevention
  
  • No good evidence to show prophlaxis following hip surgery
  • No good evidence for radiation post-excision of synostosis except in TBI
  • Some people use indomethecin, but this is not well established
  • Recurrence is treated with repeat excision after disucssion with the patient
    
    • May require a more aggressive procedure
    • Beware risk of nerve injury and infection, especially around the elbow
• results
  
  • results of resection are poor except for midshaft synostosis

Question 71

Work-up for this fracture?

Answer 71

• Full PMHx, smoker, amulatory status
• Physical exam
  
  • 10% open
  • neurovascular
  • may need to do ABI
• Plain XR
  
  • 30% will miss a hoffa’s fracture
• CT
  
  • obtain with frontal and sagittal reconstructions
  • useful for
    
    • establish intra-articular involvement
    • identify separate osteochondral fragments in the area of the intercondylar notch
    • identify coronal plane fx (Hoffa fx)
      
      • 38% incidence of Hoffa fx’s in Type C fractures
    • preoperative planning
• Angiography
  
  • indicated when diminished distal pulses after gross alignment restored​

Question 72

Benefits of a fixed angle locking construct over DCS

Answer 72

<!--StartFragment-->

• Locks to plate - better varus control
• Better control of comminution with multiple points of fixation
• Lock or compress as needed
• Less invasive insertion, less tissue disruption
• Has the versatility to use around TKA

<!--EndFragment-->

Question 73

Pros and cons of treating a distal femur fracture non-operatively

Answer 73

<!--StartFragment-->

• **indications (rare) **
  
  • nondisplaced fractures
  • nonambulatory patient
  • patient with significant comorbidities
  • Severe osteoporosis
• Significant complications associated with immobility
  
  • Decubitus ulcers
  • Thromboelmbolic disease
  • Loss of knee function
• Recent evidence supports fixation of these fractures to avoid complications

<!--EndFragment-->

Question 74

Options for fixation and post-op plan for this fracture (include approaches)

Answer 74

• ORIF Approaches
  
  • anterolateral
    
    • fxs without or with simple articular extension
    • incision from tibial tubercle to anterior 1/3 of distal femoral condyle
  • lateral parapatellar
    
    • fxs with complex articular extension
    • extend incision into quad tendon to evert patella
  • medial parapatellar
    
    • typical TKA approach
    • used for complex medial femoral condyle fractures
    • Can also use a subvastus approach for a less comlicated fracture pattern
  • medial/lateral posterior
    
    • used for very posterior Hoffa fragment fixation
    • patient placed in prone position
    • midline incision over popliteal fossa
    • develop plane between medial and lateral gastrocnemius m.
    • capsulotomy to visualize fracture
• Blade Plate Fixation
  
  • indications
    
    • not commonly used, technically difficult
    • contraindicated in type C3 fractures
  • technique
  • placed 1.5cm from articular surface
• Dynamic Condylar Screw Placement
  
  • indications
    
    • identical to 95 degree angled blade plate
  • technique
    
    • precise sagittal plane alignment is not necessary
    • placed 2.0cm from articular surface
  • cons
    
    • large amount of bone removed with DCS
    • Not good fixation in porotic bone
• Locked Plate Fixation
  
  • indications
    
    • fixed-angle locked screws provide improved fixation in short distal femoral block
  • Benefits
    
    • Locks to plate - better varus control
    • Better control of comminution with multiple points of fixation
    • Lock or compress as needed
    • Less invasive insertion, less tissue disruption
    • Less bone remove for central lag screw
    • Has the versatility to use around TKA
  • Technique
    
    • lag screws with locked screws (hybrid construct)
    • useful for intercondylar fractures (usually in conjunction with locked plate)
    • useful for coronal plane fractures
    • helps obtain anatomic reduction of joint
    • required in displaced articular fractures
• Retrograde interlocked IM nail
  
  • indications
    
    • good for supracondylar fx without significant comminution
    • preferred implant in osteoporotic bone
  • approach
    
    • medial parapatellar
    • no articular extension present
    • 2.5cm incision parallel to medial aspect of patellar tendon
      
      • stay inferior to patella
      • no attempt to visualize articular surface
    • articular extension present
      
      • continue approach 2-8cm cephalad
    • incise extensor mechanism 10mm medial to patella
    • eversion of patella not typically necessary
  • pros
    
    • requires minimal dissection of soft tissue
    • Greater stiffness
    • Trend toward fewer infections and nonunions when used appropriately
  • cons
    
    • Can fail with loss of fixation of distal construction
      
      • Nail can migrate into the knee
    • less axial and rotational stability
    • postoperative knee pain
  • Causes for malalignment
    
    • Insufficient fracture reduction
    • Poor starting point
    • Eccentric reaming
• Post-op
  
  • Immediate ROM with quads and hamstring strengthening
  • WB at 12 weeks when evidence of union
  • Can start PWB prior to this

Question 75

Complications of distal femur fracture

Answer 75

<!--StartFragment-->

• Failed hardware (in varus)
  
  • Causes of failure
    
    • Extensive metaphyseal comminution
    • Poor reduction
    • Poor plate position
    • Early weight bearing
• Symptomatic hardware
  
  • lateral plate
  • pain with knee flexion/extension due to IT band contact with plate
  • medial screw irritation
  • excessively long screws can irritate medial soft tissues
  • determine appropriate intercondylar screw length by obtaining an AP radiograph of the knee with the leg internally rotated 30 degrees
• Malunions
  
  • most commonly associated with plating
  • functional results satisfactory if malalignment is within 5 degrees in any plane
• Nonunions
  
  • treatment with revision ORIF and autograft indicated
  • consider changing fixation technique to improve biomechanics

<!--EndFragment-->

Question 76

What are the recommendations for safe tourniquette use

Answer 76

• Pressure
  
  • Anticipated inflation time <2.5 h
    
    • Upper extremity ≤250 mm Hg
    • Lower extremity ≤300 mm Hg
  • Anticipated inflation time >2.5 h
    
    • Consider measuring limb occlusion pressure and using a safety margin of 50–75 mm Hg
    • Consider using a wide, shaped cuff
• Inflation time
  
  • Assess the operative situation at 2 h
  • Anticipated duration >2.5 h
    
    • 10-min deflation interval at that point
    • and at subsequent 1-h intervals.

Question 77

What is the leading cause of death in pelvic fractures?

Answer 77

hemorrhage

Question 78

What are factors associated with poor prognosis following a pelvic fracture (mortality)

Answer 78

• systolic BP <90 on presentation
• age >60 years
• increased Injury Severity Score (ISS) or Revised Trauma Score (RTS)
• need for transfusion > 4 units

Question 79

What are the risks of injuries associated with pelvis fractures; what are you looking for on physical exam

Answer 79

• hemmorage is the leading cause of death
• chest injury in up to 63%
• long bone fractures in 50%
• head and abdominal injury in 40%
• spine fractures in 25%
• urogenital injuries in 12-20%
• inspection
  
  • test stability by placing gentle rotational force on each iliac crest; then gently pull axial traction on the legs to assess for vertical instability
    
    • low sensitivity for detecting instability
    • perform only once
  • look for abnormal lower extremity positioning
    
    • external rotation of one or both extremities
    • limb-length discrepancy
  • skin
    
    • scrotal, labial or perineal hematoma, swelling or ecchymosis
    • flank hematoma
    • lacerations of perineum
    • degloving injuries (morel-lavelle)
• neurologic exam
  
  • rule out lumbosacral plexus injuries (L5 and S1 are most common)
  • rectal exam to evaluate sphincter tone and perirectal sensation
• urogenital exam
  
  • most common finding is gross hematuria
  • more common in males (21% in males, 8% in females)
• vaginal and rectal examinations
  
  • mandatory to rule out occult open fracture

Question 80

What are the ligaments of the pelvis?

Answer 80

• anterior
  
  • symphyseal ligaments
    
    • resist external rotation
• pelvic floor
  
  • sacrospinous ligaments
    
    • resist external rotation
  • sacrotuberous ligaments
    
    • resist shear and flexion
• posterior sacroiliac complex (posterior tension band)
  
  • strongest ligaments in the body
  • more important than anterior structures for pelvic ring stability
  • anterior sacroiliac ligaments
    
    • resist external rotation after failure of pelvic floor and anterior structures
  • interosseous sacroiliac
    
    • resist anterior-posterior translation of pelvis
  • posterior sacroiliac
    
    • resist cephalad-caudad displacement of pelvis
  • iliolumbar
    
    • resist rotation and augment posterior SI ligaments

Question 81

What are adequate inlet/outlet views and what are they used for?

Answer 81

• inlet view
  
  • X-ray beam angled ~45 degrees caudad (may be as little as 25 degrees)
    
    • adequate image when S1 overlaps S2 body
  • ideal for visualizing:
    
    • anterior or posterior translation of the hemipelvis
    • internal or external rotation of the hemipelvis
    • widening of the SI joint
    • sacral ala impaction
• outlet view
  
  • X-ray beam angled ~45 degrees cephalad (may be as much as 60 degrees)
    
    • adequate image when pubic symphysis overlies S2 body
  • ideal for visualizing:
    
    • vertical translation of the hemipelvis
    • flexion/extension of the hemipelvis
    • disruption of sacral foramina and location of sacral fractures

Question 82

What on a pelvic XR would make you think it is unstable? What further imaging can you do?

Answer 82

• > 5 mm displacement of posterior sacroiliac complex
• presence of posterior sacral fracture gap
• avulsion fractures
• CT
  
  • can help you determine if there is occult posterior invovlement
• Analysis under anesthesia
  
  • IR for LC
    
    • overlaps 1-2cm then fix front
    • >2cm fix front and back
  • ER in frog leg for APC1
    
    • if opens >2.5cm fix front
  • pull legs for vertical instability APC2
    
    • fix back if presence of saggital instability
  • windswept can apply different stress to each side
• Single leg standing views can help determine in clinic instability

Question 83

What it the tile classification?

Answer 83

<!--StartFragment-->

• A - stable
  
  • A1-fracture not involving the ring (avulsion or iliac wing fracture)
  • A2-stable or minimally displaced fracture of the ring
• B - rotationally unstable, vertically stable
  
  • B1-open book
  • B2-lateral compression, ipsilateral
  • B3-lateral compression, contralateral (bucket-handle injury)
• C - rotationally and vertically unstable
  
  • C1-unilateral
  • C2-bilateral
  • C3-associated acetabular fracture

<!--EndFragment-->

Question 84

What is the young-burgess classification?

Answer 84

• Anterior Posterior Compression (APC)
  
  • APC I
    
    • Symphysis diastasis < 2 cm
    • Non-operative. Protected weight bearing
  • APC II
    
    • Anterior SI joint diastasis
    • Posterior SI ligaments remain intact.
    • Anterior symphyseal plate or external fixator
  • APC III
    
    • Disruption of anterior and posterior SI ligaments (SI dislocation).
    • APCIII injuries associated with vascular injury
    • Anterior symphyseal plate or external fixator and posterior stabilization with SI screws
• Lateral Compression (LC)
  
  • LC Type I
    
    • Oblique ramus fracture and ipsilateral anterior sacral ala compression fracture.
    • Non-operative. Protected weight bearing
  • LC Type II
    
    • Ramii fracture and ipsilateral posterior ilium fracture dislocation (Crescent fracture).
    • Open reduction and internal fixation of ilium
  • LC Type III
    
    • Ipsilateral lateral compression and contralateral APC (windswept pelvis).
    • Common mechanism is rollover vehicle accident or pedestrian vs auto.
    • Posterior stabilization with plate or SI screws as needed. Percutaneous or open based on injury pattern and surgeon preference.
• Vertical Shear (VS)
  
  • Posterior and superior directed force.
  • Associated with the highest risk of hypovolemic shock (63%); mortality rate up to 25%
  • Posterior stabilization with plate or SI screws as needed. Percutaneous or open based on injury pattern and surgeon preference.

Question 85

Which pelvic injury is associated with the highest chance of hypovolemic shock

Answer 85

vertical shear

Question 86

What is the appropriate technique for placing a pelvic binder

Answer 86

<!--StartFragment-->

• centered over greater trochanters to effect indirect reduction
• do not place over iliac crest/abdomen
  
  • ineffective and precludes assessment of abdomen
• may augment with internal rotation of lower extremities and taping at ankles
• transition to alternative fixation as soon as possible
  
  • prolonged pressure from binder or sheet may cause skin necrosis
• working portals may be cut in sheet to place percuatneous fixation

<!--EndFragment-->

Question 87

Technique for pelvic ex-fix

Answer 87

• required if you need to do angio or stabilize the pelvis for positioning/packig
  
  • ​definative if
    
    • open injury
    • bladder rupture requiring surgical repair
• theoretically works by decreasing pelvic volume
• stability of bleeding bone surfaces and venous plexus in order to form clot
• Don’t reduce with the pins because you can open in the back, push from behind as well
• pins inserted into ilium
  
  • Supra-acetabular
    
    • single pin in column of supracetabular bone from AIIS towards PSIS
      
      • obturator outlet or “teepee” view to visualize start point
      • iliac oblique - trajectory
      • obturator oblique inlet - path of wire
    • Risk - hip capsule, LFCN
  • Iliac Crest
    
    • multiple half pins in the superior iliac crest
    • place in thickest portion of anterior ilium, gluteus medius tubercle or gluteal pillar
    • faster in a more urgent situation
• should be placed before emergent laparatomy

Question 88

Indications for pelvic fixation

Answer 88

• Definative Ex-fix
  
  • contaminated open pelvis
  • extraperitoneal bladder rupture
• ORIF
  
  • symphysis diastasis > 2.5 cm
  • SI joint displacement > 1 cm
  • sacral fracture with displacement > 1 cm
  • displacement or rotation of hemipelvis
  • open fracture
• Can do assessment under anesthesia to rule out instabilty
• diverting colostomy may be requried in an open fracture
• start posterior and work anterior

Question 89

Options for anterior stabilization of the pelvis

Answer 89

• single superior plate - pubic symphyis widening
  
  • supine, make sure you can get all the necessary views before starting
  • apply through rectus-splitting Pfannenstiel approach (Modified stoppa)
  • may perform in conjunction with laparotomy or GU procedure
  • technique
    
    • confirm reduction with flouro
    • contour plate or use pre-contoured plates
    • two medial screws adjacent to the syphysis are placed first and eccentrically
      
      • use finger feel for proper screw placement
  • Controversy
    
    • 2 plates - better for rotational stability
    • 4 or 6 holes - better to use a 6 hole plate and can tailor your construct
• Ex-fix
  
  • inferior, but can be used if needed
  • can also be used if the patient becomes unstable
• Retrograde Screw vs plate
  
  • Ramii fractures can be often be treated non-op, but may need stabilization
  • Sometimes won’t heal

Question 90

Pfannsteil approach

Answer 90

• transverse incision 2 cm above the pubis
• develop subcutenous plane, incise the linea alba longitudianlly
• inspect the bladder, use a blunt malleable retractor to protect the space of reitz
• be cautionous for the corona mortise
• homans over the superior pubic ramii to retract the retus, then subperiosteial disection
• some will remove the cartilage in the pubis to promote fusion
• Options for reduction
  
  • use a large tenaculum to reduce the symphysis
  • jugabluth clamp
  • c-clamp
  • ex-fix pins

Question 91

What are your options for posterior ring stabilization of the pelvis

Answer 91

<!--StartFragment-->

• **anterior SI plating **
  
  • risk of L4 and L5 injury with placement of anterior sacral retractors
• iliosacral screws (percutaneous)
  
  • good for sacral fractures and SI dislocations
  • safe zone is in S1 vertebral body
  • outlet radiograph
    
    • superior-inferior screw placement
  • inlet radiograph
    
    • anterior-posterior screw placement
  • L5 nerve root injury complication with errors in screw placement
  • entry point best viewed on lateral sacral view and pelvic outlet views
  • risk of loss of reduction highest in vertical sacral fracture patterns
• posterior SI “tension” plating
  
  • can have prominent HW complications

<!--EndFragment-->

Question 92

What are poor prognostic factors for pelvic fractures?

Answer 92

SI joint incongruity of > 1 cm
high degree initial displacement
malunion or residual displacement
leg length discrepancy > 2 cm
nonunion
neurologic injury
urethral injury

Question 93

How do pediatric pevlic fractures differ from adult fractures?

Answer 93

• if triradiate cartilage is open the iliac wing is weaker than the elastic pelvic ligaments, resulting in bone failure before pelvic ring disruption
• for this reason fractures usually involve the pubic rami and iliac wings and rarely require surgical treatment

Question 94

Long term complications associated with pelvic fractures

Answer 94

• Dyspyruneia
• exctretory dysfuction
• sexual/erectile dysfunction
• decreased quality of life
• chronic pelvic pain
• Neurologic injury
  
  • L5 nerve root runs over sacral ala joint
  • may be injured if SI screw is placed to anterior
• DVT and PE
  
  • DVT in ~ 60%, PE in ~ 27%
  • prophylaxis essential
  • mechanical compression
  • pharmacologic prevention (LMWH or Lovenox)
  • vena caval filters (closed head injury)
• Chronic instability
  
  • rare complication; can be seen in nonoperative cases
  • presents with subjective instability and mechanical symptoms
  • diagnosed with alternating single-leg-stance pelvic radiographs

Question 95

What are bladder injuries associated with pelvis injuries

Answer 95

• Present in 12-20% of patients with pelvic fractures
  
  • higher incidence in males (21%)
• posterior urethral tear
  
  • most common urogenital injury with pelvic ring fracture
    
    • retrograde urethrogram
• bladder rupture
  
  • may see extravasation around the pubic symphysis
  • associated with mortality of 22-34%
  • diagnosis
    
    • retrograde cystogram
    • CT retrograde cystogram
      
      • can be done more quickly and gives more information
• Diagnosis
  
  • made with retrograde urethrocystogram
  • indications
    
    • blood at meatus
    • high riding or excesively mobile prostate
    • hematuria
  • technique
    
    • supine, flouro
    • flush 16/18 french foley with radioopaque dye
    • insert foley and dilate balloon at distal penis (don’t overfill, 2-3cc)
    • take a scout film, inject the dye through the foley and take static films as the dyes move through the urethra

Question 96

What are the complications and treatment of urogential injuries<!--StartFragment-->

Answer 96

<!--StartFragment-->

• Treatment
  
  • _suprapubic catheter placement _
    
    • suprapubic catheter is a relative contraindication to anterior ring plating
  • surgical repair
    
    • rupture should be repaired at the same time or prior to definitive fixation in order to minimize infection risk
• Complications - 35%
  
  • urethral stricture - most common
  • impotence
  • anterior pelvic ring infection
  • incontinence

<!--EndFragment-->

Question 97

What are the safe zones for SI screws

Answer 97

anterior - iliac cortical densities on lateral

posterior - upper nerve root canal

Question 98

What is the most important prognostic factor associated with Sacral fracture?

Answer 98

neurologic injury

Question 99

Neurological injuries associated with sacral fractures

Answer 99

<!--StartFragment-->

• Structures at risk
  
  • Cauda, filem terminale
  • Sarcal plexus
  • Sciatic nerve
• L5/S1
  
  • L5 - EHL
  • S1 - plantarflexion/achilles
• Lower sacral nerve root function (S2-S5)
  
  • S1/2 are 1/3 of the foramina and carry higher risk than S3/4 which are 1/6 diameter of foramina
  • Sympathetic
    
    • Inferior hypogastric plexus
  • Parasympathetic
    
    • Sexual function
    • anal sphincter tone / voluntary contracture
    • bulbocavernosus reflex
    • perianal sensation
• Unilateral sacral nerve root preservation is adequate for bowel and bladder control
• preservation of at least one S3 root in bilateral resection preserves bowel and bladder function in the majority of patients

<!--EndFragment-->

<!--EndFragment-->

Question 100

What is your order of fixation for combined pelvis/acetabulum?

Answer 100

• posterior ring
• acetabulum
• anterior ring

Question 101

What are indicators on plain radiographs that there might be a sacral fracture?

Answer 101

• AP(sacrum at 45 degree)/Inlet/Outlet views
• Low yeild on AP pelvis and plain radiology alone
• Signs concerning for sacral fracture
  
  • L4/5 TP fracture
  • Anterior pelvic ring disruption
  • Stepladder sign
    
    • Foraminal and lumbar facet disruption
  • sacral arcuate lines
  • asymmetric foramina

Question 102

What is the dennis classification?

Answer 102

• Zone I
  
  • a sacral alar fracture lateral to foramina 50%
  • 97% undiagnosed
  • often minimally displaced with APC and LC types
  • can be more displaced with vertical shear fractures
  • nerve injury rare (6%) and are usually L5 nerve root
• Zone II - transforaminal
  
  • 97% undiagnosed
  • 28% neuro deficits usually involving L5, S1 and S2
• Zone III (spinal canal)
  
  • 57% neuro deficits with cauda equina syndrome (bowel, bladder, sexual dysfunction) being the most common

Question 103

What are the classification systems for sacral fractures?

Answer 103

• Associated with pelvis ring
  
  • Tile/Young-Burgess
• Isler classification - Lumbar-sarcral junction
  
  • A - lateral to facet
  • B - L5/1 facet
  • C - medial to facet
    
    • Very unstable
• ​Denis - best to classifiy risk of neuro
• Descriptive classification
  
  • H pattern = lumbopelvic dissociation
  • transverse = higher neuro complications
  • lambda
  • verticle

Question 104

What are 4 principles that will guide your treatment of sacral fractures

Answer 104

1) those with an associated stable or unstable pelvic ring injury,
2) those with associated lumbosacral facet injury
3) those with associated lumbosacral dislocation
4) those with neurologic injury and persistent cauda equina or spinal cord compression.

Question 105

What are options for surgical fixation of the sacrum

Answer 105

• Indications
  
  • ​>1 cm displacement
  • unstable pelvic ring
  • comprimised soft tissues
  • persistent pain with non-op
  • displacement following non-op
  • neurological damage
    
    • requires decompression
• Percutaneous screw fixation
  
  • screws may be placed as sacroiliac, trans-sacral or trans-iliac trans-sacral
  • useful for sagittal plane fractures
  • technique
    
    • screws placed percutaneously under fluoroscopy
    • beware of L5 nerve root
    • avoid overcompression of fracture
      
      • may cause iatrogenic nerve dysfunction
  • cons
    
    • may result in loss of fixation or malreduction
    • does not allow for removal of loose bone fragments
    • do not use in osteoporotic bone
• Posterior tension band plating
  
  • approach
    
    • posterior two-incision approach
  • technique
    
    • may use in addition to iliosacral screws
  • pros
    
    • allows for direct visualization of fracture
  • cons
    
    • wound healing complications
• Iliosacral and lumbopelvic fixation
  
  • approach
    
    • posterior approach to lower lumbar spine and sacrum
  • technique
    
    • pedicle screw fixation in lumbar spine
    • iliac screws parallel to the inclination angle of outer table of ilium
    • longitudinal and transverse rods
  • pros
    
    • shown to have greatest stiffness when used for an unstable sacral fracture
  • cons
    
    • invasive
• Decompression of neural elements
  
  • indirect
    
    • reduction through axial traction
  • ​direct
    
    • posterior approach followed by laminectomy or foraminotomy

Question 106

What are the indications for non-op or operative fixation of sacral fracture

Answer 106

• Non-op
  
  • <1cm
  • no neuro
  • insufficiency
• Operative
  
  • ​>1 cm displacement
  • unstable pelvic ring
  • comprimised soft tissues
  • persistent pain with non-op
  • displacement following non-op
  • neurological damage
    
    • requires decompression

Question 107

What is the definition of a cresent fracture

Answer 107

<!--StartFragment-->

• combination of vertical iliac fx and SI dislocation
• posterior superior spine (sometimes iliac crest) remain attached to sacrum by posterior SI ligaments
• lateral ilium dislocates from sacrum as anterior SI ligament rupture
• When large ilium fragment remains with sacrum and a vertical fracture pattern is seen it is termed a crescent fracture

<!--EndFragment-->

Question 108

What are the view necessary for SI fixation? What nerve root is at risk?

Answer 108

• inlet view
  
  • shows anterior-posterior position of SI joint(s) for screw placement
• outlet view
  
  • shows cephalad-caudad position of SI joint(s) for screw placement
• lateral sacral view
  
  • ensures safe placement of SI or sacral screws relative to the anterior cortex of the sacral ala and the nerve root tunnel

Question 109

Options for treatment of an ilium fracture

Answer 109

• Wound Management
  
  • evaluation
    
    • soft tissue disruption or internal degloving injury
    • possible soft tissue or bowel entrapment in the fracture site
  • prophylactic antibiotics as appropriate
  • serial debridements as necessary
• Open Reduction Internal Fixation
  
  • approach
    
    • posterior approach
    • ilioinguinal approach
    • Stoppa approach (lateral window)
  • recommend early reconstruction
    
    • single pelvic reconstruction plate or lag screw along the iliac crest
    • supplemented with a second reconstruction plate or lag screw at the level of the pelvic brim or sciatic buttress
  • coordination with trauma team
    
    • injury to bowel may require diversion procedures
    • plan surgical intervention with trauma team to minimize recurrent trips to the operating room

Question 110

What are complications and injuries associated with ilium fractures

Answer 110

• Iliac wing fractures have high incidence of associated injuries
  
  • open injuries
  • bowel entrapment
  • soft tissue degloving
• Complications
  
  • Malunion with deformity of the iliac wing
  • Internal iliac artery injury
  • Bowel perforation
  • Lumbosacral plexus injury

Question 111

Complications associated with fracture table use

Answer 111

• Difficult to assess length and reduction
• Difficult to get reduction
  
  • posterior translation distal fragment
• Significant perineal soft tissue injury
• Pudendal nerve palsy
  
  • erectile dysfunction
  • reduced by intraoperative muscle relaxants
• Hemilithotomy
  
  • sciatic nerve in well leg
  • compartment syndrome in well leg
    
    • direct compression on calf
    • low SBP intra-op
• Lateral decubitus
  
  • crush syndrome

Question 112

Causes of complications associated with misuse of the fracture table

Answer 112

• Prolonged duration of traction
  
  • release when no longer needed
  • periodic release during long procedures
• Excessive traction
  
  • more important than prolonged traction
  • adequate muscle relaxants
• Excessive adduction
  
  • reduced with abduction of affected limb
• Small post
• hemilithotomy position

Question 113

Recommendations to decrease risk of complications with traction table

Answer 113

• obese patient use flat-top
• place post between genitals and contralateral leg
• well-padded post (>10cm)
• do not adduct past neutral
• surgery >120min should release traction periodically
• avoidance of hemilithotomy when possible

Question 114

When can you not nail an open tibia at time of initial surgery

Answer 114

• Open segmental fracture, irrespective of the size of the wound
• Gunshot wounds -high velocity and short-range shotgun injuries
• Open fracture with neurovascular injury
• Farm injuries, with soil contamination, irrespective of the size of the wound
• Traumatic amputations
• Open fractures over 8 hours old
• Mass casualties; eg, war and tornado victims

Question 115

Acceptable alignment for humeral shaft fracture and contraindications to coaptation splinting

Answer 115

• < 20° anterior angulation
• < 30° varus/valgus angulation
• < 3 cm shortening
• contraindications to functional bracing
  
  • severe soft tissue injury or bone loss
  • unreliable patient
  • polytrauma
  • brachial plexus injury
  • proximal one-third humeral fracture
  • inability to maintain reduction (segmental fracture)
  • radial nerve palsy is NOT a contraindication to functional bracing

Question 116

Relative indication for operative fixation of humeral shaft fractures

Answer 116

• Open fracture
• Associated articular fracture Neurovascular injury
• Floating elbow
• Impending pathologic fracture Polytrauma
• Failure of closed management

Question 117

Prevelance of nonunion and risk factors in humeral shaft fracture treatment

Answer 117

• Nonunion
  
  • ​no evidence of interval healing of serial XR taken 6-8 weeks apart
• defined as lack of union after 6 months
  
  • 2 to 10% in nonoperative managment
    
    • proximal
      
      • medial comminution
      • medial displacement
      • 2 part fracture
  • 15% with primary ORIF
• risk factors
  
  • axial distraction on injury films represents high level of soft tissue injury and increase chance of nonunion
  • open fx
  • unstable or segmental fx
  • infection
  • initial treatment with hanging cast
  • shoulder or elbow stiffness (motion directed to fracture site)
  • patient factors (smoking, obesity, alcoholism, malnutrition, noncompliance)
• treatment
  
  • compression plating with bone grafting
    
    • shown to be superior to both IM nailing with bone grafting and compression plating alone
    • use anterolateral approach (allows exploration of radial nerve)
  • vascularized fibula bone graft and compression plating
    
    • indicated if > 6 cm bone defect
    • technique
      
      • use bone graft as an intramedullary dowel (1-2 cm inside each end)
      • stabilize with 4.5 dynamic compression plate
    • peroneal artery (fibula) is anastomosed to brachial artery
    • peroaneal vein anastomosed with basilic or cephalic vein

Question 118

Indications for exploration of the radial nerve

Answer 118

• Open fracture
• High-velocity gunshot or penetrating injury
• Vascular injury
• Nerve deficit after closed reductiona Distal third (Holstein-Lewis) fractures

Question 119

Compare Humeral shaft IM nail and plates

Answer 119

• Nerve injury same risk
• Reports of higher rates of nonunion with IM nail
• reports of better function with plate

Question 120

What is the blood supply to the patella?

Answer 120

anterior to quads, posterior to the patellar tendon

form a ring around the patellar and penetrate anteriorly

avoid anterior soft tissue stripping

25% necrosis rate with fracture

Question 121

Indications for patellar fracture fixation

Answer 121

• >4mm distraction
• >2mm stepoff
• intra-articular fragments
• osteochondral fragment
• lose of extensor mechanism

no data exist on post-op rehab protocols

Question 122

What is the strongest construct for a patella fracture

Answer 122

figure of 8 wires with cannulated screws

interfrag screws for comminution

Question 123

What is the most appropriate treatment for a comminuted inferior pole patellar fracture

Answer 123

• debridement with tendon re-attachement to the extra-articular surface
• don’t take more than 40% of the patella
• +/- circlage wire re-inforcement

Question 124

What are indications for total patellectomy

Answer 124

• failed ORIF
• infection
• tumor
• PF OA
• 47% of the strength of the quads is lost
• should reinforce with VMO over the defect (shown to have better outcomes)

Question 125

complications of patellar ORIF

Answer 125

• hardware irritation
• hardware migration is rare
• stiffness
  
  • strength
  • pain
  • not associated with immobilization
• Nonunion
• deep infection
• association with OA is unclear

Question 126

What is the appropriate dosing for tetanus

Answer 126

• Clean wound/G1
  
  • update vaccine (Toxoid) if no hx or if > 10yrs
• Dirty wound/G2/G3
  
  • Unknown
    
    • Toxoid (vaccine)
    • TIG (immunoglobulin)
  • > 5 yrs
    
    • Toxoid (vaccine)

Question 127

What are options for segmental bone defects

Answer 127

• Acute shortening: 1-3 cm
  
  • problems with function after
• Autologous bone graft < 5cm
  
  • more than that gets resobed
  • has no structural capacity
• Induced membrane 5-24 cm
  
  • can use a RIA to fill the void
  • don’t exceed 3:1 allograft:autograft
  • Requires more than one procedure
• Bone transport 5-10cm
  
  • long time
  • can correct alignment and used with comprimised tissues
• Vascularized fib graft 10-20 cm
  
  • donor site morbidity
• Allograft bone is not useful due to unknown issues with incorperation
• BMP unknown…interfere with membrane formation

Question 128

What is the ladder of soft tissue reconstruction

Answer 128

• secondary closure
• primary closure
• delayed closure
• STSG
• FTSG
• Random flap
• Axial Flap
• Free muscle flap
• Perforator flap

Question 129

What are the pros and cons of various bone augmentation

Answer 129

• Autologous (<5cm)
  
  • One-stage reconstruction; no disease transmission; no immunologic rejection; low cost; standard of care with osteoinductive, osteoconductive, and osteogenic properties
  • Donor site morbidity, limited volume available, no structural capability
• Induced membrane (5-24cm)
  
  • adequate volume, internal or external fixation can be used, reconstruction time is independent of length of defect, low cost
  • Donor site morbidity, two-stage technique, long reconstructive period (average, 9 mo), described using external fixation, ratio of allograft to autograft cannot exceed 3:1 with theoretic defect limits
• Distraction osteogenesis (5-10cm)
  
  • No donor site morbidity, no restrictions on defect length, reliable technique, can be used with a compromised soft-tissue envelope (STSG or free tissue flap), can decrease reconstructive time with multiple osteotomies and transport segments
  • Long reconstructive period, reconstructive period is length- dependent, high rate of complications with prolonged external fixation, cost of ring or spatial external fixation frame
• Acute shortening (1-3cm)
  
  • Simplest and fastest method, allows early primary closure of soft-tissue wounds, well tolerated in upper extremity, well tolerated in single bone extremity segment, no donor site morbidity, low cost
  • Limb dysfunction especially in lower extremities, defect length is limited, may require secondary lengthening procedures to correct limb-length discrepancy
• Vascularized fibular graft (10-20cm)
  
  • Substantially shorter reconstruction time for large defect compared with Masquelet and Ilizarov techniques, fibular hypertrophy to support weight-bearing, low cost
  • Donor site morbidity, requires specialized microsurgical capability, high rate of regenerated bone fracture, typically limited to tibial defects

Question 130

What is considered a critical segmental bone loss

Answer 130

• bone loss requiring augmentation
• >50%
• >2cm
• depends on bone and patient

Question 131

What are not acceptable bone augments for critical deficiets

Answer 131

• Allograft alone
  
  • Limited graft incorporation/ remodeling, potential disease transmission, no osteoinductive or osteogenic properties, cost/expense
• Demineralized bone matrix
  
  • No structural property, no evidence for segmental bone defect reconstruction, cost/expense
• BMP
  
  • Interferes with Masquelet technique, no structural capability, cost/expense

Question 132

What are common marine organisms

Answer 132

• The most common infections are still staph aureus and strep pyogenes
  
  • but need extra coverage for the strange bugs
• A hydrophilia - fresh
• pseudomonas
• mycobacterium marinum - swimming pool
  
  • chronic or occult
• Vibrio - salt water

Question 133

What are approapriate antibiotics for open wounds

Answer 133

• Gustilo 1
  
  • cefazolin
  • clinda if allergy
• Gustilo 2/3
  
  • cefazolin
  • gentamycin
  • Farm wounds - penicillin or flagyl
• Freshwater (A hydrophilia)
  
  • cipro or ceftazidime
• Salt water (vibrio)
  
  • Doxycycline
  • ceftaxidime or cipro

Question 134

What are the 4 C’s of muscle viability

Answer 134

contracility

colour

consistency

capacity to bleed

Question 135

What is the best stictch for primary closure of an open fracture

Answer 135

• Donati allgower
• No difference in infection rates with primary or delayed closure
• primary closure is recommended for Gustilo I-IIIa**​

Question 136

Indications for delayed closure with VAC or bead pouch

Answer 136

• limited soft tissue viability
• lack of soft tissue coverage
• severe contamination
• Note - bead pouch or abx PMMA can significantly decreased risk of infection with delayed closure

Question 137

What are options for local antibiotic delivery

Answer 137

bead pouch

PMMA

calcium sulfate

demineralized bone matrix

fibrin clot

Question 138

What is the most important determinant for prevention of infection of >gustilo 3b

Answer 138

soft tissue coverage < 7 days

Question 139

What is the algorythim for treament of open tibia fractures

Answer 139

• Abx, tetanus
• Abx as soon as possible
• IM Nailing
  
  • has been shown to be safe initially for treatment gustilo I-IIIb
  • no consensus reamed vs unreamed
• Ex-fix
  
  • If ex-fix required change to IM nail as soon as possible
• Plates not recommended
• Indications for Ex-fix
  
  • gross conatmination

Question 140

Compare IM nail to plate fixation for distal tibia fractures

Answer 140

• Plates have lower malunion rate
  
  • better for a very distal fracture
    
    • use anterolateral and MIPO
  • cause hardware irritation
• Nails better for elderly patients with thin skin and poor soft tissues
  
  • fracture blisters, diabetes, open
  • cause knee pain
• How to increase nail stability
  
  • locked screws
  • more screws
  • multi-planar screws

Question 141

How does treatment of the fibula affect the outcome of distal tibia fractures

Answer 141

• With IM nails
  
  • improved stiffness
  • improved alignment
  • increased risk of nonunion
    
    • avoid if causes tibial fracture gapping
• Absolute indications
  
  • evidence of syndesmotic injury
  • medial tibial plating
    
    • to avoid valgus

Question 142

Techniques to reduce a proximal tibia fracture

Answer 142

• Blocking screws
• Schantz pins/Femoral distractor
• unicortical plate
• more proximal/lateral start point
• suprapatellar nailing
• reduced herzog bend
• reduction clamp

Question 143

How can you avoid malreduction when nailing a distal tibial fracture

Answer 143

• improved outcomes with reaming
  
  • ​may even be better than plates
• no difference with weight bearing early
• avoid eccentric reaming
• stabilize posterior malleolus first
• blocking screws
• bone reduction forceps
• distal locking screw first with appropriate technique
• femoral distractor
• unicortical plates
• multiple screws
• multiple planes
• use of a VAC can decrese edema

Question 144

What are your anatomical landmarks for positioning your humoral hemiarthroplasty

Answer 144

• Normal alignment
  
  • 140 deg Neck shaft angle
  • 30 deg retroversion
• humeral head is 5.6cm above pec major
  
  • >10mm proud = increased tuberosity failure
  • 15mm shortening tolerated
• Use bicipetal groove or long head biceps to access version compared to fin
  
  • 20-30 deg retroversion
• Tuberosity placement 1-1.5cm distal to superior margin
  
  • wire or sutures can augment fixation

Question 145

What factors predict survival of humeral head following fracture displacement

Answer 145

• primarily anterior circumflex, although head debate becasue arcuate artery has significant anastomosis with the posterior circumflex
• >2mm metaphyseal segment
• valgus impaction
• intact medial hinge

Question 146

Indications for hemiarthroplasty in proximal humerus fracture

Answer 146

• varus malalignment >20° in whom anatomic reduction cannot be achieved intraoperatively
• moderate or severe osteopenia
• aged >55 years with Neer three or four-part fracture dislocations
• malunion
• nonunion
• hardware failure
• osteonecrosis of the humeral head fol- lowing osteosynthesis

Question 147

What is the unhappy shoulder triad

Answer 147

prosthesis too proud

too retroverted

GT positioned too low

Question 148

complications of humeral head arthroplasty

Answer 148

tuberosity nonunion

deep infection

HO

proxmial migration humeral head

Question 149

What are the common injuries associated with a tibial plateau fracture

Answer 149

• meniscal tears
  
  • lateral meniscal tear
    
    • more common than medial
    • associated with Schatzker II fracture pattern
  • medial meniscal tear
    
    • most commonly associated with Schatzker IV fractures
• ACL injuries
  
  • more common in type V and VI fractures (25%)
• compartment syndrome

Question 150

What are the complications associated with TEA

Answer 150

prosthetic loosening

polyethylene wear of the bushing

periprosthetic fracture

infection

Question 151

Compare TEA and ORIF for distal humerus fractures

Answer 151

• No difference in complication rate
• Negligable data to suggest TEA decreases reoperation
• Main difference is that TEA has improved functional outcomes (Level 1 evidence)

Question 152

Classification of distal humerus fractures

Answer 152

AO classification
Jupiter Classficiation

High T
Low T
Y
H
Lambda - medial and lateral

Question 153

What imaging can help you assess distal humerus fractures

Answer 153

Medial column - 45deg
Lateral column - 20 deg
Single arch sign - capitellum alone

Double arch sign - both capitellum and trochlea invovled

Question 154

Complications associated with distal humerus fractures

Answer 154

• Watch for wound break down
  
  • Medial flap is more tenuous than the lateral flap, so tend your incision medially
  • If there is wound breakdown the most robust flap is the radial forearm rotational flap
• Heterotopic ossification
  
  • Rads vs indomethecin
• Ulnar neuropathy
  
  • Usually resolves
  • No evidence for transposition
• Elbow stiffness
  
  • Infection

Question 155

Options for approaches for distal humerus fractures

Answer 155

• use posterior approach - workhorse of the elbow
  
  • Consider nerve transposition (don’t need to do it)
  • Identify proximally and release 6cm proximal and 6cm distal
  • Release osborne’s ligament
• olecranon osteotomy
  
  • provides the best exposure of the articular surface
  • chevron vs transvers - (pollock says transverse is better because you can come threw the bare area)
  • use a plate to close this back up (the screw tends to have a nonunion)
  • still preferable for posterior trochlea fx and medial epiconyle fx
• bryan-morray
  
  • Release the triceps off the olecranon without doing the osteomty
• triceps split for higher fractures
• lateral muscles interval
  
  • is an alternative to visualize the articular
  • elevate ECRB and part of ECRL of supracondylar ridge
  • usually able to work anterior to and sacrifice LCL
  • if fx of lateral column, utilize and mobilize
  • sublux joint to assist in articular visualization

Question 156

technical pearls of fixing distal humerus fractures

Answer 156

• Every screw in the distal fragments should pass through a plate
• Engage a fragment on the opposite side that is also fixed to a plate
• As many screws as possible should be placed in the distal fragments
• Each screw should be as long as possible
• Each screw should engage as many articular fragments as possible
• The screws in the distal fragments should lock together by interdigitation, creating a fixed-angle structure
• Plates should be applied such that compression is achieved at the supracondylar level for both columns
• The plates must be strong enough and stiff enough to resist breaking or bending before union occurs at the supracondylar level

Question 157

Options for fixation of a distal humerus fracture

Answer 157

• Bag of bones
• ORIF
  
  • olecranon osteotomy best but don’t use if considering TEA
  • parallel or orthoganol no awsner
• TEA
  
  • elderly, low demand
  • Maximum 10 lbs
  • Better functional outcomes with no increase in complications for revision surgery compared to ORIF
• Arthrodesis
  
  • ​severe post-traumatic OA
  • severe soft tissue/bone loss
  • persistent/chronic infection
  • neurlogical comprimise
  • failed TEA

Question 158

Rehab following distal humerus fixation

Answer 158

• depends on nature of fracture ORIF
  
  • if secure fixation begin early passive motion 7-10 days
  • Don’t immobilize for longer than 3 weeks
  • Restrict lifting for 12 weeks
• TEA
  
  • Limit ROM for 1 week to allow healing and then AROM
  • Permanent restriction of 5lb limit

Question 159

Options for coverage around the ankle

Answer 159

• Dorsalis pedis flap
  
  • covers medial and lateral ankle
  • campbells says can cover heel as well
• EDB - cover lateral ankle
• Heel
  
  • supramalleolar
  • sural flap
  • FHB or abductor hallucis
• Peroneal flap is also a good option for distal coverage

Question 160

What is the best reason for poor prognosis following clubfoot treatment

Answer 160

gastroc weakness from repeated heelcord lengthening

Question 161

Where is the corona mortis and what are the vessels

Answer 161

4-6 cm lateral to the symphesis along the superior pubic ramus

external iliac/inferior epigastric

obturatot

Question 162

What is the emergent management of pelvic ring fractures

Answer 162

• resuscitation
  
  • superior gluteal injury most common (APC, vertical shear)
  • internal pudental or obturator (lateral compression)
  • 80% from venous bleeding
  • 10% bone
  • 10% from arterial bleeding
  • transfusion
    
    • PRBC:FFP:Platelets ideally should be transfused 1:1:1
  • pelvic binder/sheet
    
    • flat sheet around GT, don’t tie a knot and keep away from the belly
    • IR the lower extremity and can tape the ankles
    • remove as soon as possible
    • contraindications
      
      • hypothetical risk of over-rotation of hemipelvis and hollow viscus injury (bladder) in pelvic fractures with internal rotation component (LC)
• external fixation
  
  • indications
    
    • pelvic ring injuries with an external rotation component (APC, VS, CM)
    • unstable ring injury with ongoing blood loss
  • contraindications
    
    • ilium fracture that precludes safe application
    • acetabular fracture
  • technique
    
    • theoretically works by decreasing pelvic volume
    • stability of bleeding bone surfaces and venous plexus in order to form clot
  • should be placed before emergent laparotomy
• angiography / embolization
  
  • controversial and based on multiple variables including:
    
    • protocol of institution, stability of patient, proximity of angiography suite , availability and experience of IR staff
  • CT angiography useful for determining presence or absence of ongoing arterial hemorrhage (98-100% negative predictive value)
  • complications
    
    • _​_gluteal necrosis
    • impotence

Question 163

Henry Approach

Answer 163

• Supine, tourniquette, flouro
• Mark the fracture site
• Incision centered over fracture in line with biceps tendon and radial styloid
• Be cautious of lateral antebrachial cutanous nerve
• Ulnar border of BR is identified and fascia is divided
  
  • pronator teres proximally
  • FCR distally
• identify the radial nerve and vessels
  
  • plane is between the nerve and vessels
  • ligate perforators
• Subperiosteal disection
  
  • supnator proximally - supinate to protect the PIN
  • Pronator mid shaft - need to pronate to see the insertion
  • FPL and PQ distally

Question 164

Thompson approach

Answer 164

• Planes
  
  • Proximally between
    
    • ECRB (radial nerve)
    • EDC (pin nerve)
  • Distally between
    
    • ECRB (radial nerve)
    • EPL (pin nerve)
• Incision from listers tubercle to lateral epicondyle
  
  • superficial radial nerve and cephalic vien

Question 165

Indications for fixation of clavicle fractures

Answer 165

• absolute
  
  • unstable Group II fractures (Type IIA, Type IIB, Type V)
  • open fxs
  • displaced fracture with skin tenting
  • subclavian artery or vein injury
  • floating shoulder (clavicle and scapula neck fx)
  • symptomatic nonunion
  • posteriorly displaced Group III fxs
  • displaced Group I (middle third) with >2cm shortening
• relative and controversial indications
  
  • brachial plexus injury (questionable b/c 66% have spontaneous return)
  • closed head injury
  • seizure disorder
  • polytrauma patient

Question 166

Outcomes with operative fixation of clavicle fractures

Answer 166

• improved functional outcome / less pain with overhead activity
• faster time to union
• decreased symptomatic malunion rate
• improved cosmetic satisfaction
• improved overall shoulder satisfaction
• increased shoulder strength and endurance
• increased risk of need for future procedures
• implant removal
• debridement for infection

Question 167

Options for fixation of a clavicle fracture

Answer 167

• plate and screw fixation
  
  • superior vs anterior plating
    
    • superior plating biomechanically higher load to failure and bending
    • superior plating better for inferior bony comminution
    • superior plating has higher risk of neurovascular injury during drilling
  • limited contact dynamic compression plate
    
    • 3.5mm reconstruction plate
    • locking plates
    • precontoured anatomic plates
    • lower profile needing less chance for removal surgery
• intramedullary screw or nail fixation
  
  • higher complication rate including hardware migration
• hook plate
  
  • AC joint spanning fixation

Question 168

Post-operative course of clavicle fracture

Answer 168

sling for 7-10 days followed by active motion
strengthening at ~ 6 weeks when pain free motion and radiographic evidence of union
full activity including sports at ~ 3 months

Question 169

Complications of clavicle ORIF

Answer 169

• hardware complications
  
  • ~30% of patient request plate removal
  • superior plates associated with increased irritation
• neurovascular injury (3%)
  
  • superior plates associated with increased risk of subclavian artery or vein penetration
  • compression can cause brachial plexus injury
  • examples
    
    • psuedoanyrsm
    • hematoma
• brachial plexus injury
• adhesive capsulitis
  
  • 4% in surgical group develop adhesive capsulitis requiring surgical intervention nonunion (1-5%)
• infection (~4.8%)
• mechanical failure (~1.4%)

Question 170

Approach to neurvascular comprimise following clavicle ORIF

Answer 170

• repeat history and physical
  
  • inspect wound drainage
  • hematoma in axilla
  • differential BP
• Post-op XR
  
  • AP
  • Zanca view
• CT angio
• Differential
  
  • hematoma
  • pseudoanuerysm
  • direct injury to brachial plexus
  • traction injury from positioning
• Operative treatment
  
  • call vascular, prep the other leg
  • open incision
  • remove hardware
  • osteotomize for access if need be then secure with larger plate ensureing your screws aren’t too long

Question 171

complications of monteggia fracture

Answer 171

• PIN neuropathy
  
  • up to 10% in acute injuries
  • treatment
    
    • observation for 2-3 months
    • spontaneously resolves in most cases
    • if no improvement obtain nerve conduction studies
• Stiffness
• HO
• Infection
• PLRI
• Malunion with radial head dislocation
  
  • usually caused by failure to obtain anatomic alignment of ulna
  • treatment
    
    • ulnar osteotomy and open reduction of the radial head

Question 172

Blocks to reduction of monteggia fracture

Answer 172

poor reduction ulna

annulus

PIN

osteochondral fragement

Question 173

Acceptable alignment for tibial shaft fracture

Answer 173

< 5 degrees varus-valgus angulation
< 10 degrees anterior/posterior angulation
> 50% cortical apposition
< 1 cm shortening
< 10 degrees rotational alignment
if displaced perform closed reduction under general anesthesia

Question 174

Benefits of IM nail for a tibial shaft fracture

Answer 174

• IM nailing leads to (versus external fixation)
  
  • decreased malalignment
• IM nailing leads to (versus closed treatment)
  
  • decrease time to union
  • decreased time to weight bearing
• reamed vs. unreamed nails
  
  • reamed possibly superior to unreamed nails for treatment of closed tibia fxs for decrease in future bone grafting or implant exchange (SPRINT trial)
  • recent studies show no adverse effects of reaming (infection, nonunion)
  • reaming with use of a tourniquet is not associated with thermal necrosis of the tibial shaft
  • reamed nails associated with
    
    • decreased hardware failure
    • superior union rate
    • decrease time to union

Question 175

Indications for amputation following lower extremity injury

Answer 175

significant soft tissue trauma (most important - LEAP)
warm ischemia > 6 hrs
severe ipsilateral foot trauma

not stable enough for long reconstructive surgery for dysvascular limb

Question 176

Complications associated with tibial nailing

Answer 176

• Knee pain
  
  • >50% anterior knee pain with IM nailing
  • occurs with patellar tendon splitting and paratendon approach
  • pain relief unpredictable with nail removal
  • lateral radiograph is best radiographic views to make sure nail is not too proud proximally
• Malunion
  
  • high incidence of valgus and procurvatum (apex anterior) malalignment in proximal third fractures
  • varus malunion leads to ipsilateral ankle pain and stiffness
  • chronic angular deformity is defined by the proximal and distal anatomical/mechanical axis of each segment
  • center of rotation of angulation is intersection of proximal and distal axes
  • treatment
    
    • reason to treat
      
      • arthritis
      • pain
      • cosmesis
    • treated with osteotomy and nailing
• Nonunion
  
  • definition
    
    • delayed union if union at 6-9 mos.
    • nonunion if no healing after 9 mos.
  • treatment
    
    • nail dynamization if axially stable
    • exchange nailing if not axially stable
    • reamed exchange nailing most appropriate for aseptic, diaphyseal tibial nonunions with less than 30% cortical bone loss.
    • posterolateral bone grafting if significant bone loss
    • non-invasive techniques (electrical stimulation, US)
    • BMP-7 (OP-1) has been shown equivalent to autograft
    • compression plating has been shown to have 92-96% union rate after open tibial fractures initially treated with external fixation
• Malrotation
  
  • most commonly occurs after IM nailing of distal 1/3 fractures
  • can assess tibial rotation by obtaining perfect lateral fluoroscopic image of knee, then rotating c-arm 105-110 degrees to obtain mortise view of ipsilateral ankle
• Compartment syndrome
  
  • incidence 1-9%
  • can occur in both closed and open tibia shaft fxs
  • diagnosis
    
    • high incidence of clinical suspicion
    • pain out of proportion
    • pain with passive stretch
    • compartment pressure within 30mm Hg of diastolic BP is most sensitive diagnostic test
  • treatment
    
    • emergent four compartment fasciotomy
  • outcome
    
    • failure to recognize and treat compartment syndrome is most common reason for successful malpractice litigation against orthopaedic surgeons
  • prevention
    
    • increased compartment pressure found with
      
      • traction (calcaneal)
      • leg positioning
• Nerve injury
  
  • LISS plate application without opening for distal screw fixation near plate holes 11-13 put superficial peroneal nerve at risk of injury due to close proximity
  • transient peroneal nerve palsy can be seen after closed nailing
    
    • EHL weakness and 1st dorsal webspace decreased sensation
    • treated nonoperatively; variable recovery is expected

Question 177

Indications for operative correction of tibial malunion

Answer 177

• valgus > 10-12 deg
• varus > 6-10 deg;
• external rotation > 15-20 deg;
• internal rotation > 10-15 deg;
• shortening of more than 2 cm;

Question 178

Risk factors for femoral neck nonunion

Answer 178

Non-anatomic Reduction – especially VARUS
Posterior Comminution
High Shear Angle(pauwel’s angle)

iv. Poor Implant positioning – TAD
v. High Energy Injury with significant fracture displacement

smoker

BMI

Question 179

What is the cruciate anastomosis

Answer 179

• medial circumflex artery
• lateral circumflex artery
• inferior gluteal artery
• first branch of femoris profundis

Question 180

Poor prognostic factors of amputation according to LEAP

Answer 180

Smoking
Non- white race
Poverty
lack of private health insurance
poor social support
involvement in disability litigation

Self-efficacy

Question 181

Complications of femoral head fracture

Answer 181

• Heterotopic ossification
  
  • overall incidence is 6-64%
  • anterior approach has increased heterotopic ossification compared with posterior approach
  • treatment
    
    • administer radiation therapy if there is concern for HO
  • especially if there is associated head injury
• AVN
  
  • 23%
  • risk is greater with delayed reduction of dislocated hip
  • the impact of anterior incision on AVN is unknown
• Sciatic nerve neuropraxia
  
  • incidence is 10-23%
  • usually peroneal division of sciatic nerve
  • spontaneous recovery of function in 60-70%
• DJD
  
  • incidence 8-75%
  • due to joint incongruity or initial cartilage damage
• Decreased internal rotation
  
  • may not be clinically problematic or cause disability

Question 182

Risk of nonunion

Answer 182

motion

vascularity

gap

infection

Question 183

Treatment of a femoral nonunion

Answer 183

Exchange nailing

• sequential reaming
  
  • stimulates bone graft
  • allows insertion of a larger, stiffer nail
• Ream 1-1.5mm larger than implant
• Larger, stiffer implant
• No need to bone graft unless atrophic
• dynamize the construct to try and get compression
• Reasons for plating
  
  • metaphyseal fractures
    
    • don’t get benefit of reaming
  • atrophic
    
    • becasue will consider compression and grafting
  • allows better debridement with presence of infection

Question 184

What is the treatment of an adult galeazzi fracture?

Answer 184

• Usually operative, requires operative fixation as it requires anatomic fixation of the DRUJ
  
  • volar approach to the radius
  • dorsal approach to the DRUJ
    
    • make sure to examine TFCC if does not reduce with the radius
• Treatment of the ulna
  
  • immobilization in supination (6 weeks)
    
    • indicated if DRUJ stable following ORIF of radius
  • percutaneous pin fixation
    
    • indicated if DRUJ reducible but unstable following ORIF of radius
    • cross-pin ulna to radius
    • examine the TFCC
    • leave pins in place for 4-6 weeks
  • open surgical reduction
    
    • indicated if reduction is blocked
    • suspect interposition of ECU Tendon
    • Examine and repair TFCC if still unstable
  • open reduction internal fixation
    
    • indicated if a large ulnar styloid fragment exists
    • fix styloid and immobilize in supination

Question 185

Incidence of DRUJ instability in a galeazzi fracture? What are signs of this on XR

Answer 185

• if radial fracture is
• unstable in 55%
• if radial fracture is >7.5 cm from articular surface
• unstable in 6%
• Signs of DRUJ injury
• ulnar styloid fx
• widening of joint on AP view
• dorsal or volar displacement on lateral view
• radial shortening (≥5mm)

Question 186

Complications associated with galeazzi fractures

Answer 186

• Compartment syndrome
  
  • increased risk with
    
    • high energy crush injury
    • open fractures
    • vascular injuries or coagulopathies
• Neurovascular injury
• uncommon except type III open fractures
• Refracture
  
  • usually occurs following plate removal
  • increased risk with
    
    • removing plate too early
    • large plates (4.5mm)
    • comminuted fractures
    • persistent radiographic lucency
  • prevention
    
    • do not remove plates before 18 months after insertion
      
      • amount of time needed for complete primary bone healing
• Nonunion
• Malunion
  
  • ​difficult to treat
  • if early enough can treat with osteotomy
  • later will require sauve-kapanji or darrach
• DRUJ subluxation
  
  • displaced by gravity, pronator quadratus, or brachioradialis

Question 187

Increased risk of galeazzi refracture with…

Answer 187

removing plate too early
large plates (4.5mm)
comminuted fractures
persistent radiographic lucency

Question 188

How to use a RIA

Answer 188

• Pre-op AP and lateral to measure canal size to determine what size of reamer to use
• Warn anesthesia of blood loss and 45 min additional OR time
• Supine on the OR table with adequate flouro access
• GT start point, careful reaming, severeal passes; change position of guide wire to harvest the entire canal
• Complications
  
  • blood loss
    
    • don’t suction when not reaming
  • perforation of canal with guide wire or reamer
  • Iatrogenic fracture

Question 189

Approach to proximal humerus malunion

Answer 189

• decide whether pain is due to soft tissue or boney
• assess ROM, NV
• CT - boney
• MRI - soft tissues, RC
• Arthroscopy
  
  • release capsule, rotator internal with subscap tenolysis
  • <15mm GT
    
    • soft tissue release with acromioplasty
  • >15mm GT
    
    • release RC, debride then reattach
    • acromioplasty
• Open Osteotomy
  
  • varus malunion
• Hemiarthroplasty
  
  • no OA present
  • can use an undersized, nonanatomic component so you don’t have to do a GT osteotomy
  • mixed results
• Reverse
  
  • RC tear with OA present
  • good results but technically very demanding

Question 190

Indications for Surgery in Scapula Fracture

Answer 190

Most (90%) treated non-op with no functional deficits

Glenohumeral instability:

>25% glenoid involvement with subluxation of humerus

>5mm of glenoid articular surface step off or major gap

Excessive medialization of glenoid

Displaced scapular neck fracture

>2.5cm medialization (1cm in the tests)

30-40o angulation on Y-view

Glenopolar angle <22o : controversial

Open fracture

Coracoid fracture with >1cm displacement

Loss of rotator cuff function

Question 191

Classification Systems for Scapula Fracture

Answer 191

Coracoid:

Type I: proximal to CC ligaments

Type II: Distal to CC ligaments (Tip)

Acromion:

Type I: avulsion

Type II: fracture not compormising subacromial space

Type III: fracutre compromises subacromial space

Body fractures: Ideberg classificationType I: Rim fractures (Like a Bankart)

Ia: anterior rim

Ib: posterior rim

Type II: Through the glenoid exiting laterally

Type III: Through the glenoid exiting superiorly

Type IV: Through the glenoid exiting medially

Type V: combination type injuries

Va: Combination of II & IV

Vb: Combination of III & IV

Vc: Combination of II, III & IV

Type VI: Severe comminution

Question 192

Describe Glenopolar angle and the normal value

Answer 192

Angle between:

Line connecting top and bottom of glenoid

Line connecting top of glenoid and most caudal part of scapula

N = 30-45^o

Question 193

Internervous Plane Judet Approach to Scapula

Answer 193

Judet = posterior approach to glenohumeral joint

Infraspinatus (suprascapular nerve)

Teres Minor (Lower subscapular nerve)

Question 194

Associations of Scapula Fractures

Answer 194

2-5% mortality rate

Usually pulmonary or head injury

Associated with Increased ISS score

No difference in:

• Mortality
• ICU stay
• Overall hospiital stay
• Head or abdominal injuries

Lower rate of extremity fractures

Orthopaedic injuries (90%)

• Rib 52%
• Ipsilateral clavicle fracture 25%
• Spine fracture 29%
• Brachial plexus injury 5%
• 75% of brachial plexus injuries resolve

Medical Injuries

• Pumonary injury
• Pneumothorax
• Pulmonary contusion
• Head injury
• Vascular injury

Question 195

X-ray Finding of Scapulothoracic Dissociation. What MUST you do on exam?

Answer 195

>1cm lateralization from SP of spine vs. other side

Must do neurovascular exam & generally a CT angio is warranted as neurovascular compromise common

Question 196

Most common vascular injury in scapulothoracic dissociation?

Answer 196

Subclavian artery injury

Question 197

Single most important factor in determining outcome in scapulothoracic injury

Answer 197

Neurologic compromise (esp Flail extremity) –> poor outcomes

Question 198

Treatment for Scapulothoraic dissociation

Answer 198

Early forequearter amputation for complete brachial plexus injury (flail chest)

High lateral thoracoctomy or Median sternotomy for vascular injury

ORIF of any other shoulder girlde injuries (SSSC)

Question 199

Outcomes in Scapulothoracic injury

Answer 199

Flail extremity: 52%

Early amputation: 21%

Death: 10%

Question 200

Most important risks for nonunion of PHF

Answer 200

Smoking: increases 5.5x

Age

Question 201

What are the risks and protective factors for AVN of the humeral head post PHF

Answer 201

Protective

>8mm calcar fragment on neck

Maintenance of the medial hinge

Simple fracture pattern

Risks:

4-part fractures

Angular displaceent >45o

Displacement of tuberosities >10mm

GH fracture dislocation

Head split

Question 202

Indications for ORIF of PHF

Answer 202

Indications:

GT > 5mm displaced

2, 3, 4part fractures in young patients

Head splitting fractures in young

Question 203

Common risks post PHF

Answer 203

Axillary nerve injury: most common

Screw penetration following ORIF with locked plates

Question 204

Acceptable alignment humeral shaft fracture

Answer 204

<20^o anterior angulation

<30^o varus/valgus angulation

<3cm shortening

Question 205

Risk factors for nonunion humeral shaft fracture (treated nonop)

Answer 205

Motion

Avascularity

Gap

Transverse fracture

Infection

Opern fracture

Smoking

Obesity

Metabolic abnormalities:

Vitamin D most common

Question 206

Indications for Operative Management humeral shaft fracture

Answer 206

Absolute:

Open fracture

Severe soft tissue injury or bone loss

Vascular injury requiring repair

Brachial plexus injury

Ipsilateral forearm fracture (floating elbow)

Compartment syndrome

Relative:

Bilateral humerus fractures

Polytrauma or associated lower extremity fracture

Allows early weight bearing through humerus

Pathologic fractures

Burns or soft tissue injury that precludes bracing

Fracture characteristics:

Distraction at fracture site

Short oblique or transverse pattern

Intraarticular extension

Question 207

IM Nail vs. ORIF Outcomes in Humeral shaft fracture

Answer 207

IM Nail has:

Higher rate of reoperation

Higher rate of impingement/shoulder pain

Higher rate of neurologic injury when locking distally

Higher rate of nonunion