Dislocations Flashcards
(32 cards)
most common dislocation
GHJ
98% of GHJ dislocations are
anterior
trauma mechanism that causes GHJ dislocation
severe external rotation and fall on elbow
2 signs of axillary nerve palsy
badge patch numb and decreased deltoid function
detachment of anterior labrum and shoulder capsule =
Bankart lesion
in <20yo with GHJ dislocation __% redislocate so offer __
80
Sx stabilisation
management of majority of GHJ dislocations =
3 wk sling -> physio
mechanism of injury for posterior GHJ dislocation
posterior force on adducted and internally rotated shoulder
perhaps due to a seizure
light bulb sign on xray
posterior GHJ dislocation
ACJ dislocation mechanism of injury
fall onto shoulder
Rx of ACJ dislocation
coracoclavicular lig intact = conservative
not = reconstruction
possible complications of posterior sternoclavicular J dislocation
compress trachea, oesophagus, brachiocephalic vein
Rx for posterior sternoclavicular dislocation =
reduce - clamp bone and pull
empty cup sign =
Rx =
lunate with capitate not in it - perilunate dislocation
urgent reduction and wire stabilisation
most common finger dislocation
common in __+__
dorsal PIPJ dislocation
rugby and cricket
swan neck deformity if ___ disrupted
volar plate
native hip dislocation often ass with ___ and sometimes ____
posterior acetabulum wall #
femoral head avulsion # from lig teres
risks after native hip dislocation =
AVN (up to 2yrs later)
heterotrophic ossification
Rx of native hip dislocation =
emergency reduction
may need internal fixation if # ass is large
1st time hip replacement dislocation Rx =
closed reduction and knee splint (decrease hip flexion and ext rotation)
___ hip replacement decreases ROM and dislocation rate but may need replaced sooner
constrained cup
mechanism of lateral patellar dislocation
sudden quad contraction +/- direct blow
predispositions to patellar dislocations
F <20yo ligament laxity valgum femoral neck anteversion shallow trochlea
Rx of patellar dislocations
reduce > 3 wk splint > physio
