erecta

Luxatio Erecta

Epidemiology

 

Rare, inferior shoulder dislocation

 

Aetiology

 

Forced abduction injury

 

Pathology

 

Shoulder is hyperabducted

- humeral shaft abuts the acromion

- humeral head is levered inferiorly

- tears inferior capusle

 

Head becomes locked inferior to glenoid

 

May button hole through inferior capsule

- becomes irreducible