ortho eopt revision Flashcards
define open fracture
fracture or its hematoma that communicates with the external environment
classification for open fractures
gustilo anderson classification
what is gustilo I
size: wound < 1 cm minimal ST damage mild contaimination low impact risk of amputation: 5%
what is gustilo II
size: wound 1-10cm moderate ST injury, no flap or avulsion moderate contamination moderate commintion risk of amputation: 10%
what is gustilo III
size; wound > 10cm
extensive ST injury
significant contamination
high impact
IIIA:
adequate ST coverage of bone
risk of amputation: 20%
IIIB:
inadequate ST coverage
risk of amputation: 30%
IIIC:
arterial injury (regardless of wound size)
prophylactic faciotomy
risk of amputation: >40%
management of open fracture
1) primary survey (ABCDE, remove gross debris, tro open fracture, escalate to consultant)
2) check neurovascular status + apply direct pressure on bleeding wound
3) early management (analgesia according to WHO pain ladder, splint fracture)
4) AMPLE + XR + photograph wound
5) prepare for EOT (antibx = 1st gen cephalosporin cephalaxin +/- gentamycin for GIII, tetanus, nbm)
6) debridement + wound culture
7) repair vascular injuries + amputate crush injuries
8) remove comminuted fragments
9) dilute bacterial load with 10L saline
10) reduce, maintain & stabilise
11) 48h later: relook operation (repeat I&D? wound cover)
12) 4-6 weeks: bone graft
bone complications of open fractures
1) OM
2) arthritis
3) malunion
4) delayed union
5) non union: SPLINTS
6) AVN
causes of nonunion
SPLINTS
1) soft tissue interposition
2) position of reduction
3) location
4) infection
5) nutrition
6) tumor
7) severity of injury
regional complications of open fractures
1) neurovascular injury
2) ST blisters/fracture blisters (haemorrhagic/non)
3) complex regional pain syndrome
4) heterotopic ossification
5) joint stiffness
6) compartment syndrome (after wound closure)
7) surgical site infection
complications of compartment syndrome
1) rhabdomyolysis
2) volksmann ischaemic contracture
3) permanent functional impairment
systemic complications of open fracture
1) hypovolemic shock
2) fat embolisation
3) DVT/PE
4) MODS
5) ARDS
position of fragments in femoral shaft fracture of proximal 1/3 or midshaft
proximal: flexed, abducted, externally rotated (iliopsoas @ lesser trochanter, gluteus medius/minimus @ greater troch)
distal: adducted
position of fragmenst in distal 1/3 femoral shaft fracture
proximal: adducted
distal: flexed (gastroc)
management of femoral shaft fracture in infant
1-2 weeks: gallow’s traction
3-4 weeks: hip spica
management of femoral shaft fracture in child
3-4 weeks: traction
- child < 12kg : gallow’s traction
- older children: thomas’s splint + pearson knee attachment
6 weeks: hip spica
management of femoral shaft fracture in adolescent
traction + spica followed by ORIF + plate/screws (if reduction unsatisfactory)
management of femoral shaft fracture in adults
1) thomas splint at scene
2) ABCDEs of trauma
3) analgesia
4) manipulation & reduction with conscious sedation
5) hold with traction with thomas’ splint
6) intramedullary nail within 24h (ext fixation if open fracture)
7) early mobilisation
general complications of femoral shaft fracture
1) haemorrhage
2) shock
3) fat embolism
4) ARDS
5) MODS
6) DIVC
early complications of femoral shaft fracture
1) vascular injury: femoral artery
2) neurological injury: sciatic nerve
late complications of femoral shaft fractures
1) thromboembolism
2) fat embolism
3) infection
4) delayed union/non-union
5) malunion
6) joint stiffness (joint injury or ST adhesion)
types of proximal femur fractures
1) neck of femur
2) intertrochanteric
3) subtrochanteric
types of neck of femur fractures
1) subcapital
2) transcervical
3) basicervical
risk factors for proximal femur fractures
1) non modifiable
- old age
- F
- early menopause
- nulliparity
- family history or personal history of fractures
2) modifiable
- factors increasing risk of falls
- factors reducing bone strength (osteoporosis, steroids/smoking/alc, hypo/hyperthyroidism, physical immobility, pathological bone conditions, chronic liver/kidney conditions)
bruising suggestive of intra or extra capsular proximal femoral fracture?
extra capsular
classification for neck of femur fractures
garden’s classification
garden’s classification
type 1: incomplete impacted fracture
type 2: complete fracture, not displaced
type 3: complete fracture, moderately displaced (head in varus, internally rotated, abducted; distal externally rotated)
type 4: complete fracture, severely displaced
management of NOF fracture in <60
undisplaced: hip spica
displaced: m&r > internal fixation (cancellous screws)
management of NOF fracture in > 60
undisplaced
- 65: cancellous screw
- 90: hemiarthroplasty
displaced
- hemiarthroplasty
- THR
why is internal fixation contraindicated in displaced NOF fracture of old (>60)
risk of AVN + nonunion
general complications of NOF fracture
1) thromboembolism
2) pneumonia
3) bed sores
4) uti
fracture related complications of NOF fracture
1) AVN of femoral head (NOF fracture can sever both nutrient artery + retinacular artery, leaving ligamentum teres vessels insufficient)
2) nonunion (SPLINTS)
- <50: bone graft across fracture
- >50: hemiarthroplasty or THR
3) secondary OA
management for intertrochanteric or subtrochanteric fractures
m&r under anaesthesia + internal fixation with PFNA
causes of hip dislocation
1) septic arthritis
2) muscle imbalance
3) trauma
4) post THR (THR unstable in flexion, adduction, internal rotation)
mechanism of injury of posterior hip dislocation
dash board injury
associated injuries with posterior hip dislocation
1) PCL injury
2) posterior wall of acetabulum
3) femoral fracture
4) sciatic nerve injury
signs of posterior hip dislocation
1) shortened limb
2) hip adducted, internally rotated and flexed
management of posterior hip dislocation
m&R with bigelow’s maneuver
- relax muscles w conscious sedation (IV fentanyl/GA/spinal)
- stabilise pelvis
- flex + upward traction + abduct + externally rotate
signs of anterior hip dislocation
abduction + external rotation + flexion of hip
management of anterior hip dislocation
m&r with barlow’s maneuver
- relax muscles
- stabilise pelvis
- flex + downward pressure + adduct + internally rotate
complications of hip dislocation
1) early
- fractures
- vascular injury
2) late
- avn of femoral head
- myositis ossificans
- coxa magna
- recurrent dislocations
- secondary OA (cartilage injury + intraarticular loose bodies)
differential diagnosis of hip pain
1) referred pain
- discogenic (sciatic nerve)
2) joint disorders
- septic arthritis
- oa
- ra
- perthe’s disease
- slipped capital femoral epiphysis
- osteonecrosis
3) bone
- fracture
- dislocation
4) periarticular disorders
- hernia
- iliotibial band tendinitis
- trochanteric bursitis
- LN
- PID
- gluteal muscle strain
- SI pathology
risk factors for avascular necrosis of hip
main: FRACTURE, DIABETES, ALCOHOL ABUSE, STEROIDS, IDIOPATHIC
V: haemoglobinopathies (e.g. sickle cell)
I - septic arthritis
T - fracture/dislocation
A - SLE, RA
M - alcohol abuse > hyperlipidemia, obesity, smoking, caisson’s disease, gaucher’s disease, cushing’s disease
I - steroids
N - malignant infiltration (leukemia/lymphoma)
C - perthes, scfe, factor v leiden
pathophysiology of avascular necrosis
1) metabolic factors
2) local factors
- arterial supply interruption/vascular damage
- venous stasis/occlusion
- capillary compression (2ndary to marrow swelling)
> increase interosseous pressure > ischaemia
most reliable modality in picking up AVN
MRI
T1: low density area (edema)
T2: double line sign
- high intensity inner line: reparative granulation tissue
- low intensity peripheral line: sclerotic bone
staging system for avascular necrosis of hip
ficat arlat (mri + xr + clinical)
ficat arlat stage 0
preclinical: at risk
normal imaging
ficat arlat stage 1
preradiographic: bone death within 48h without structural changes
- s/s: pain
xr+ ct = normal
mri = edema
bone scan = increased uptake
ficat arlat stage 2
precollapse: repair and early structural failure
- s/s: pain, stiffness
xr = sclerosis + cyst formation
mri = geographic defect
bone scan = increased uptake
ficat arlat stage 3
collapse: major structural collapse of necrostic bone
- s/s: pain, stiffness, limping
xr = crescent sign + flattening of femoral head mri = crescent sign + cortical collapse
management for ficat arlat stage 1 and 2
1) conservative
- non pharmacological: bed rest, physiotherapy, splintage, weight relief (crutches)
- pharmacological: NSAIDs, bisphosphonates
2) surgical
- core decompression + bone grafting (indication: avn from venous stasis/marrow edema)
management for ficat arlat stage 3
surgical
- femoral head resurfacing
- hemiarthroplasty
- transtrochanteric rotational osteotomy
- realignment osteotomy
ficat arlat stage 4
osteoarthritis: articular destruction
- s/s: v painful, stiffness, limp
xr = LOSS mri = 2ndary degenerative changes
management for ficat arlat stage 4
surgical
- resurfacing arthroplasty
- THR
differentials for hip pain in child <3 yo
1) infection
2) trauma
3) toddler’s fracture (1-4)