Lecture 5: UE Injuries Part 2 Flashcards
What joints are found in the elbow?
- Ulnohumeral & Rapdiocapitellar articulation: Flex/Extend + Pronate/Supinate
- Proximal radioulnar articulation: Pronate/Supinate
a Rad Cap = radius articulates with capitellum
Main 3 ligaments of the elbow
- Ulnar collateral ligament
- Radial ollateral ligament
- Annular ligament
Main 3 nerves of the elbow
- Ulnar
- Median
- Radial
Main 3 arteries of the elbow
- Brachial
- Radial
- Ulnar
XRAY views for the elbow
- AP
- Lateral
- Oblique (radcap view, 45deg): best for radial head visualization
Interpreting elbow imaging rules
- Anterior humeral line should bisect middle third of capitellum
- Radcap line should pass through center of capitellum (3-4)
- Disruption may indicate fx
Lateral Elbow XR
AP Elbow XR
Top 3 MC Elbow complaints
- Pain
- Stiffness
- Swelling
Order of Elbow Assessment
- Inspect
- Palpate
- ROM
What does flexion/supination of the elbow use? Extension? Pronation?
Muscles & Nerves
- Flexion/supination: Biceps, C5-C6, musculocutaneous nerve
- Extension: Triceps, C7-C8
- Pronation: Pronator teres, median nerve, C6-C7
Describe a valgus stress test on the elbow.
- Tests medial ligament strength. (UCL)
- Elbow 20deg flexed with supinated forearm
- Apply pressure LATERALLY
VaL = Lateral
Describe a varus stress test on the elbow.
- Tests lateral collateral ligament
- Elbow 20 deg flexed and supinated forearm
- Apply pressure from the MEDIAL SIDE
FOOSH
Falling on an outstretched hand
MCC of distal humerus factures
- Direct trauma
- Axial loading during FOOSH
MC Fracture patterns seen for distal humerus
- Type A: supracondylar is MC in children.
- Type B: epicondylar is medial/lateral.
- Type C: intercondylar is MC overall.
Growth plate = looks like type A location
What nerves can get injured with a distal humerus fx?
- Ulnar nerve: sensory + flexion/adduct of wrist, 4/5 DIP joint flexion, finger abduction
- Radial nerve: sensory + wrist extension
How does a distal humerus fx present?
- Pain, swelling, tender, bruising, crepitus
- ROM limited
- Shortening if displaced fx
- Make sure to check NV status above and below!
supracondylar - radial artery/med nerve
epicond - uln nerve, rad nerve
XRAY findings for distal humerus fx
- Fat pad sail sign indicates intra-articular bleeding or occult fx, MC in kids
- If you see a posterior fat pad: ALWAYS PATHOLOGIC
AP and lateral
Type A supracondylar fx XR
Type B Epicondylar fx XR
Type C intercondylar fx XR
Management of Type A/supracondylar elbow fx
- If no displacement/angulation: long arm cast at 90 deg
- If displaced/angulated/NV compromise: ORIF
Management of type B epicondylar elbow fx
- Isolated, minimal displacement (< 2 mm): 90 deg splint.
- For medial condyle: Pronate forearm
- For lateral condyle: Supinate forearm
- Mod displacement (2-4mm): Perc pinning or ORIF
- Severe: ORIF
Long Arm Posterior Splint
Type A supracondylar fx
If epi: you would pronate for medial, supinate for lateral
Top 2 MOI for olecranon fx
- Falling on a semi-flexed, supinated forearm (avulsion)
- Direct trauma
Triceps contracting, yanking a piece of olecranon off
How does an olecranon fx present?
- Normal stuff over olecranon process
- Limited ROM
- Deformity if associated dislocation
- MC Nerve affected: Ulnar
How to image an olecranon fx?
- Start with AP and lateral views
- Radcap view if unclear or complicated
Management of a nondisplaced olecranon fx with minimal displacement (< 2 mm displacement)
- Long arm posterior with elbow at any deg of flexion.
- Forearm neutral
- Squeeze rubber ball 5 mins/d
- Repeat XR in 7-10 days
Management of displaced olecranon fx
- Closed fx: Splint and ORIF
- Open: IV abx and consult ortho
CI to surgery for olecranon fx
- Elderly
- Too many comorbidities
Sling and start ROM as pain allows
What is the MC fx of the elbow?
Radial Head/Neck Fx
What is the MOI for a radial head/neck fx?
FOOSH resulting in compression of radial head into capitellum
What are the 4 Mason classifications for radial head/neck fx?
- Type 1: < 2 mm displacement
- Type 2: Displaced > 2 mm
- Type 3: Comminuted
- Type 4: radial head fx + elbow dislocation
How does a radial head/neck fx present? (3)
- Pain/tenderness along lateral aspect of elbow
- Limited ROM, esp with pronation/supination
- +/- swelling/ecchymosis
What is often seen on AP and lateral views of the elbow for a radial head/neck fx?
- Fx line
- Fat pad line
A posterior fat pad is always pathological.
How do we manage a Mason Type 1 Radial head/neck fx? (4)
1 = < 2 mm displacement
- Sling (can be w/ or w/o posterior splint)
- AROM after 24-48h (full extension + flexion, Pronation and supination with elbow flexed at 90d)
- Ortho f/u in 1 week
- Can aspirate if hemarthorsis is blocking early ROM
How do we manage a Mason type 2-3 Radial head/neck fx? (2)
2 = > 2 mm displacement, 3 = comminuted
- Sling + splint
- Ortho f/u in 2-3 days to dicuss ORIF
How do we manage a type IV radial head/neck fx? (1)
Fx + dislocation
CONSULT ORTHO IMMEDIATELY
What is Radial Head subluxation more colloquially known as?
Nursemaid’s elbow
What ligament does the radial head sublux through in nursemaid’s elbow?
Annular ligament
Who is radial head subluxation MC in?
Children under 5 years
What is the MOI for a radial head subluxation?
Pulling on a pronated forearm with elbow extended
Like you’re holding a kid’s hand as they walk
Once radial head subluxation occurs, how does it present? (4)
- Arm held semi-flexed, adducted, pronated
- Refusing ROM
- Tenderness over radial head
- No swelling or ecchymosis
It is not a fx, so swelling is rare.
Dx of radial head subluxation
Clinical
Only need imaging if you suspect a different injury.
Management of radial head subluxation (3)
- Reduction via supination-flexion or hyperpronation
- Make sure to premedicate with tylenol or motrin
- You can try 3-4 times, but less likely to succeed if its been 1+ day since injury
You want to reduce it IMMEDIATELY
Describe the supination-flexion reduction technique.
Radial head subluxation
- Hold elbow with thumb over radial head
- Quickly supinate forearm completely
- Quickly flex forearm
Describe the hyperpronation technique (3)
- Hold elbow with your thumb over the radial head
- Hyperpronate forearm
- Completely extend and then flex the forearm.
EBM prefers this for the first attempt.
If reduction fails for a radial head subluxation, what do we do? (2)
- Order XRs
- Splint (posterior long-arm) and refer
If reduction succeeds for a radial head subluxation, what do we do? (3)
- Tylenol/motrin PRN
- +/- sling
- Parent education
What tendinosis is MC: Lateral wrist (extensors) or Medial wrist (flexors)?
Lateral epicondylitis, aka tennis elbow
Medial is golfer’s elbow
What is the usual MOI for epicondylitis?
Chronic repetitive overuse
When is epicondylitis MC? (age range)
30-50
What causes pain in lateral epicondylitis? (2)
- Wrist extension
- Gripping (shaking hands, computer mouse, screwdriver, back-handed tennis swing)
Extension and supination
Where does point tenderness occur in epicondylitis?
1 cm distal to the epicondyle
Medial is the same.
What causes pain in medial epicondylitis? (2)
- Pronation and wrist flexion (golf, overhead throw, bowling)
- Gripping weakness
Dx of epicondylitis
Clinically
Managment of epicondylitis (5)
- Activity modification
- NSAIDs + Ice
- PT if failure of conservative tx
- Counterforce brace
- Steroids x 3 max
When should you refer to ortho regarding epicondylitis?
Symptoms persists for 6 months despite conservatie therapy
MOIs for olecranon bursitis (3)
- Trauma: fall, direct blow
- Inflammation: excessive leaning, RA, gout
- Infection: Septic bursitis MC d/t staph or strep
Presentation of chronic olecranon bursitis (2)
- Gradual swelling of bursa up to 6cm
- +/- pain, mild tenderness, limited ROM
Presentation of acute olecranon bursitis
- Sudden swelling of bursa
- Pain/tenderness/limited ROM
- Redness and warmth
When is aspiration indicated for olecranon bursitis? (1)
Large & Symptomatic
Analyze fluid with CBC, gram stain, C&S, and for crystals
When is AP and lateral XR indicated for olecranon bursitis? (1)
Hx of trauma
Tx of non-septic olecranon bursitis with mild swelling (2)
- Activity modification
- NSAIDs
Tx of non-septic, large edematous olecranon bursitis (5)
- Aspirate
- Compression bandage
- f/u in 2-7 days
- Negative culture = reaspirate and reculture
- Negative culture x 2 with persistent swelling = aspirate + 1 mL corticosteroid
ABX for immunocompetent patient with mild, septic bursitis
Bactrim PO
Alt: keflex
What is considered a severe septic bursitis?
- Systemic toxicity
- Rapid progression in 48hrs
- Unable to tolerate PO
- Close indwelling medical device
- Immunosuppressed
ABX for severe septic bursitis (2)
- IV Vancomycin
- Add cipro or zosyn if hx of trauma
Need pseudomonal coverage for trauma
What is in a forearm XR series?
- AP
- Lateral
What is in a wrist/hand/finger XR series? (3)
- PA
- Oblique
- Lateral
What is a Galeazzi fx? (2)
- Radial midshaft fx
- Unstable distal radioulnar joint (DRUJ)
What is a monteggia fx? (3)
- Promixal 1/3 ulnar shaft
- Dislocation of radial head
- Unstable promixal radioulnar joint (PRUJ)
MUGGER Mnemonic
- MU = monteggia ulnar (A is proximal)
- GR = Galeazzi radial (Z is distal)
How does a forearm fx present? (3)
- Deformtity, swelling, ecchymosis
- Point tenderness overlying fx
- Decreased ROM above and below
Make sure to check NV status + compartments
What two indications require Emergent referral for ortho for a forearm fx?
- Arterial compromise
- Open fx
What 4 indications recommend an urgent referral to ortho for a forearm fx?
- Ulnar fx with < 50% apposition or > 10d angulation
- Any DRUJ or PRUJ instability
- Peripheral nerve injury
- Both bones got fx + displaced
What 3 indications are just priority referrals to ortho for a forearm fx?
- Isolated radial fx
- Both bones fx, but mnimal/no displacement
- Isolated proximal 1/3 ulnar fx
What is considered a simple, isolated fx of the ulnar shaft? (4)
- Middle-distal 1/3
- < 50% displacement
- < 10d angulation
- No joint involvement
How do we manage a simple isolated, non-proximal fx of the ulnar shaft?
- Long-arm posterior splint with neutral forearm + slight wrist extension + 90d elbow
- After 1-3 wks, change to a functional forearm brace for 4-6 wks
- F/u Xrays at 1 week and q4wks until healing is done.
Usually 8 weeks to heal.
When do we do a double sugar tong splint for a forearm fx?
- Isolated radial fx
- Combined radial + ulnar fx
- Galeazzi or Monteggia fx
Carpal bones mnemonic
- Some (scaphoid)
- Lovers (Lunate)
- Try (Triquetrum)
- Position (pisiform)
- That (Trapezium)
- They (Trapezoid)
- Cant (Capitate)
- Handle (Hamate)
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Nerve distribution of the hand (3)
- Ulnar: Medial (medial half of 4th digit + pinky)
- Median: Palmar Lateral (Lateral half of 4th digit to thumb)
- Radial: Dorsal Lateral hand (Thumb + 2nd and 3rd digit up to PIP joint)
Palmar vs Dorsal Blood flow
- Palmar has two arches and is fed by both ulnar and radial arteries
- Dorsal has 1 arch and is fed solely by radial artery
MC MOI for a wrist fx?
FOOSH
MC type of wrist fx between Colles and Smith
Colles fx: distal radial fx is tilted dorsally
Dinner fork deformity (collard greens for dinner)
Describe a smith’s fx
Distal radial fragment tilted volarly/palmarly
Garden spade deformity
How does a wrist fx present clinically? (3)
- Acute pain
- Tenderness
- Swelling
Colles Fx XR
Smith Fx XR
Management of a non/miminally displaced non-articular wrist fx
- Sugar tong or short arm cast for 2-3 weeks (but wait 72hrs to allow swelling)
- AP and lateral XR weekly for 2 weeks
Wrist fx swell a lot!
Management for displaced or open wrist fx?
ORIF
What is the MC type of carpal bone fx?
Scaphoid
in young men ):
What are the 3 main complications of untreated scaphoid fx?
- High incidence of a delayed dx
- Non-union
- Avascular necrosis
What is the MOI for a scaphoid fx?
FOOSH onto hyperextended hand.
What 3 things are seen on clinical presentation of a scaphoid fx?
- Wrist pain/swelling along radial aspect
- Tenderness along anatomical snuff box
- Grip/ROM is painful/limited/weak
What XRs do you order for a scaphoid fx? (2)
- Wrist series
- Scaphoid/navicular view (PA with wrist ulnar deviated)
CT/MRI if neg but suspicious still.
Management of a nondisplaced fx/negative XRAY scaphoid fx (4)
- Thumb spica splint/cast x 6 wk
- Refer to ortho
- Repeat XR in 1-2 weeks if it was initially negative
- If XR is negative AGAIN but still tender, CT/MRI.
Managment for a displaced scaphoid fx (2)
- ORIF
- Percutaneous pin placement
What nerve is compressed in carpal tunnel syndrome? (CTS)
Median nerve
What 4 physical tests are used to evaluate CTS?
- Tinel’s
- Phalen’s
- Carpal compression test
- Hand elevation test
What physical sign suggest late CTS?
Thenar atrophy
Besides activity, what can aggravate CTS?
Nighttime
To diagnose CTS, what must be done?
EMG/NCS
What are the primary management options for CTS? (3)
- Activity modification
- Cock-up wrist splint
- Corticosteroid injections
When do you refer to ortho for CTS release? (2)
- Failure of 3 months of conservative therapy
- Objective neuro findings/thenar atrophy
What is the MC hand fx?
Boxer’s fx = fx of 4th +/- 5th metacarpal
In children, which part of the 5th phalange is typically injured?
physis of the 5th phalange
In adults, which part of the 5th phalange is MC injured?
Distal phalanx
How do Boxer’s fx tend to appear?
Malrotated
Note the pinky rotation
For a metacarpal neck fx, when can you reduce it vs splint it?
- > 30deg angulation => reduce it
- < 30deg angulation = splint for 2-3 weeks
What metacarpal neck fx requires an ulnar gutter splint? Radial gutter splint?
- Ulnar gutter = 4th or 5th metacarpal
- Radial gutter = 2nd and 3rd metacarpal
For a non-displaced fx of 2-5th metacarpal/phalangeal shafts, what is the management? (2)
- Metacarpals: Gutter splints for 3-4 weeks
- Phalangeal: Buddy tape/aluminum splint
For a non-displaced fx of the 1st metacarpal/phalange, what is the splint?
Thumb-spica + wrist in 30deg extension
For a non-displaced/non-articular fx of the 1st metacarpal base, what is the management?
Thumb spica splint/cast x 4 weeks
For any displaced/angulated metacarpal/phalangeal shaft fx or intra-articular fx, what do you do for management?
Call Ortho :)
What causes gamekeeper’s thumb and what occurs?
Also called skier’s thumb
- MOI: Forced radial abduction
- Rupture of UCL of 1st MCP joint
Clinical presentation of gamekeeper’s thumb (3)
- Pain/swelling/tenderness along medial 1st MCP joint
- Weak pincer function
- Stress test after local anesthesia
Management for gamekeeper’s thumb (2)
- Thumb spica splint
- Refer to Ortho
Cause and pathology of mallet finger (2)
- MOI: Hyperflexion of DIP
- Pathology: Rupture/lac/avulsion of extensor tendon at distal phalanx
Clinical presentation of Mallet finger (4)
- DIP flexed at around 40deg + inability to actively extend
- PROM is intact
- Mild tenderness over dorsal DIP
- May be associated with avulsion fx
Managment of mallet finger (2)
- Splint of DIP in full extension for 4-8 wks
- CANNOT REMOVE SPLINT
What will occur with an improperly treated mallet finger?
Swan neck deformity
Cause and pathology of boutonniere deformity (2)
- MOI: foced flexion of PIP
- Pathology: Rupture of central extensor tendon on middle insertion
The PIP version of mallet finger
How does Boutonniere deformity present? (4)
- Finger partially flexed at PIP but extended at DIP
- Swelling/pain/point tenderness along dorsal PIP
- Limited ROM
- Inability to fully extend PIP
Management of Boutonniere deformity
Splint PIP in extension but leave DIP free for 4-8 weeks
A more proximal version of mallet finger splinting
When do you refer to ortho for boutonniere deformity? (3)
- Failed conservative
- Associated irreducible PIP dislocation
- Open fx
Describe the pathology of De Quervain’s tenosynovitis
Inflammation of tendon sheath covering extensors and ABductors of the thumb
Clinical presentation of De Quervain’s Tenosynovitis (3)
- Aching pain/point tenderness along radial wrist
- Pain can radiate up arm
- Thickened 1st dorsal compartment
What physical test is diagnostic of De Quervain’s tenosynovitis?
Finkelstein test
Ulnar deviation of adducted thumb = pain
Management of De Quervain’s tenosynovitis (3)
- Thumb spica splint
- Modify activity
- NSAIDs
What 2 things can ortho do for De Quervain’s?
- Corticosteroid injections into tendon sheath
- Surgical release of 1st dorsal compartment
What do ganglion cysts overly?
Joints or tendon sheaths
MC location and age for a ganglion cyst?
Female 10-40 over their dorsal aspect of wrist
Also called bible cyst so you smack it with your bible
How can you differentiate a ganglion cyst from a solid lesion?
Transillumination
Clinical dx
Management of a ganglion cyst (3)
- Observe it until it regresses
- Aspiration +/- corticosteroid
- Surgical removal
What is the underlying pathology of trigger finger? (2)
- Idiopathic dysfunction of flexor tendon as it glides through sheath
- Usually due to tendon size and sheath discrepancy
MC digits affected with trigger finger? (2)
- 3rd
- 4th
How does trigger finger present? (4)
- Catching/snapping/locking of finger
- Worse at night
- Painful nodule on palm
Management of Trigger Finger (3)
- NSAIDs
- Corticosteroid injection (1 max if hx of RA, otherwise 2nd in 3-4 wk)
- Surgical release if above fails
What is Dupuytren’s coontracture and who is it MC in?
- Progressive fibrosis of palmar fascia
- MC in men older than 50.
RFs for Dupuytren’s (6)
- Epilepsy
- DM
- Pulmonary disease
- ETOH
- Smoking
- Repetitive vibrational trauma (like a jackhammer)
MC phalange affected in Dupuytren’s
4th
How does Dupuytren’s contracture present?
- Painless nodules near distal palmar crease
- Cord that contracts as nodules thickens
- Limited extension, normal flexion
Management of Dupuytren’s (2)
- Night splinting at night to help slow progression
- Surgical release indicated if MCP is flexed more than 30deg
3 MOIs that can cause brachial plexus syndrome
- Traction force
- Direct blow to top of shoulder
- Stretching of plexus during arm ABduction (grabbing when falling)
What are the primary nerves that make up the brachial plexus?
C5-T1
Which MOIs for brachial plexus syndrome cause C5-C7 damage typically?
- Traction force
- Direct blow
Classic symptoms seen in brachial plexus syndrome (2)
- Sharp, burning pain with radiculopathy in affected nerve root distribution
- Weakness
Injuries to what part of the brachial plexus may also cause Horner’s syndrome?
C8-T1
PAM (ptosis, andhidrosis, miosis)
What physical finding might suggest the spinal cord is injured instead of just the brachial plexus?
Ipsilateral leg spasticity or weakness
Image of C-spine nerve root physical tests
When is MRI indicated in diagnosinsg brachial plexus syndrome? (2)
- Abnormal XRs
- Persistent symptoms
What test might help us pinpoint specific locations of nerve dysfunction?
EMG/NCS
Management of Brachial plexus syndrome (3)
- Strengthening and stretching
- Splinting neutral position if any joints are affected by paralyzed muscles
- Encourage PROM
Atheletes cannot return to activity until fully resolved.
What is in the thoracic outlet? (5)
- First rib
- Subclavian artery/vein
- Brachial plexus
- Clavicle
- Lung apex
What is thoracic outlet syndrome and who is it MC in?
- Compression of brachial plexus and/or subclavian vessels in shoulder girdle/1st rib
- MC in women 20-50
How does thoracic outlet syndrome present?
- Compression of brachial plexus
- Compression of vascular structures (swelling/discoloration)
- Fatigue, weakness, aching pain
- Exacerbated by lifting arm above head
What must you palpate for if you suspect thoracic outlet syndrome?
Supraclavicular fossa to assess for a mass
What is the physical test used to check for thoracic outlet syndrome?
Elevated arm stress test
Management of Thoracic outlet syndrome (3)
- Home exercise programs
- Muscle strengthening + posture exercises
- NSAIDs, muscle relaxers, TENS