Shoulder Dyslocation Flashcards
How does shoulder dislocation occur?
The humeral head dislodges from the glenoid cavity of the scapula.
What is subluxation?
Partial dislocation of the shoulder, the ball pops back into the socket naturally
How does anterior dislocation of the shoulder occur?
The head of the humerus moves anteriorly (forward) in relation to the glenoid cavity
What are anterior dislocations usually due to?
Trauma (fall)
How does the arm usually present after an anterior dislocation?
Abducted and externally rotated
How is an anterior dislocation usually diagnosed?
Humeral head is seen in a subcortacoid position
What is the most common shoulder dislocation?
Anterior dislocation
What injuries are associated with Anterior shoulder dislocations?
Hill-sachs deformity
Bankart lesions
Axillary nerve damage
What is a Hill-sachs deformity?
Compression fractures of the posterolateral part of the head of the humerus
What is the consequence of Hill-sachs deformity?
Makes the shoulder less stable and at risk of further dislocations.
What are Bankart lesions?
Tears to the anterior portion of the labrum
What is the result of damage to the axillary nerve?
Damage causes a loss of sensation in the “regimental badge” area over the lateral deltoid
What are posterior shoulder dislocations associated with?
Electric shocks and seizures.
What is the problem with posterior shoudler dislocations and x-rays?
They are usually missed on x-rays.
Need to do AP and lateral view
What signs would you see on an x-ray of someone with posterior shoulder dislocation?
Light bulb sign
Rim sign
Trough line sign
