Dislocations

Question 0

Gleno-humeral dislocation

Answer 0

Most common dislocation. 
Usually anterior (subcoracoid)
MOI excessive abduction and external rotation. 
May involve axillary nerve. 
Sling 3-5 weeks in internal rotation

Question 1

Dislocation vs Subluxation

Answer 1

Dislocation: complete dissociation of articular surfaces

Subluxation: partial dissociation

Question 2

Bankart lesion

Answer 2

Damage to anterior glenoid labrum due to dislocation.

Question 3

Patellar dislocation

Answer 3

Most commonly lateral

MOI external rotation of tibia and foot when knee is flexed.

Question 4

Dislocation of lunate

Answer 4

Most commonly dislocated carpal
MOI: FOOSH
Lunate displaced anteriorly into wrist, between flexor tendons and capitate.

May result in median nerve lesion and avascular necrosis.

Question 5

Elbow dislocation

Answer 5

MOI usually FOOSH or MVA
Usually accompanies fractures.

Ulna and radius displace posteriorly.

May involve brachial artery, median and/or ulnar nerve.

Question 6

Hip dislocation

Answer 6

Uncommon.
Seated, femur pushed posteriorly.
Often involves acetabular fracture and sciatic nerve damage.

Question 7

Apprehension test

Answer 7

To test for joint stability in chronic stage following dislocation

AF: Active movement into position of injury. If apprehensive expression no PROM testing

PR: passive movement into position of injury. If apprehensive expression end feel is empty and joint may not be healed and/or stable.