Glenohumeral Dislocation Quiz
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Questions and Answers

Which joint is the most frequently dislocated major joint?

  • Knee joint
  • Hip joint
  • Glenohumeral joint (correct)
  • Elbow joint

What is the usual mechanism for an anterior glenohumeral dislocation?

  • Fall on the extended arm with the shoulder in flexion
  • Fall on the extended arm with the shoulder in extension (correct)
  • Fall on the flexed arm with the shoulder in extension
  • Fall on the flexed arm with the shoulder in flexion

Where does the humeral head come to lie in an anterior glenohumeral dislocation?

  • Lateral to the glenoid, just above the coracoid process
  • Lateral to the glenoid, just below the coracoid process
  • Medial to the glenoid, just above the coracoid process
  • Medial to the glenoid, just below the coracoid process (correct)

What percentage of shoulder dislocations are accounted for by posterior dislocations?

<p>Around 5% (B)</p> Signup and view all the answers

What is a common cause of posterior dislocation?

<p>High-energy trauma (C)</p> Signup and view all the answers

Is glenohumeral dislocation a common injury in children?

<p>No, it is a very unusual injury in children (A)</p> Signup and view all the answers

What is a key clinical feature of posterior dislocation?

<p>Glenohumeral joint fixed in internal rotation (C)</p> Signup and view all the answers

Which type of radiograph is better for diagnosing posterior dislocation?

<p>Axillary or modified oblique views (B)</p> Signup and view all the answers

What are some complications of glenohumeral dislocation?

<p>Axillary nerve injury, brachial plexus palsy, and rotator cuff tears (B)</p> Signup and view all the answers

What is the usual treatment for glenohumeral dislocation?

<p>Closed reduction under sedation (A)</p> Signup and view all the answers

Which method is used for reducing a shoulder dislocation where the elbow is bent to 90 degrees and slowly rotated externally to 75 degrees?

<p>Kocher's method (D)</p> Signup and view all the answers

What is the recommended period of immobilization after closed reduction of a shoulder dislocation in younger patients?

<p>3-4 weeks (A)</p> Signup and view all the answers

What is the main risk in younger patients after closed reduction of a shoulder dislocation?

<p>Recurrent dislocation (C)</p> Signup and view all the answers

What is the most common nerve injury associated with shoulder dislocation?

<p>Axillary nerve (B)</p> Signup and view all the answers

What percentage of patients over the age of 50 with shoulder dislocation have nerve injuries?

<p>30% (B)</p> Signup and view all the answers

What is the recommended imaging modality to diagnose a rotator cuff tear in patients who have not regained active abduction by 4-6 weeks after injury?

<p>Ultrasound or MRI scan (A)</p> Signup and view all the answers

What is the frequency of rotator cuff tears or greater tuberosity fractures in glenohumeral dislocations?

<p>10-30% (A)</p> Signup and view all the answers

When is early mobilization encouraged after closed reduction of a shoulder dislocation?

<p>Patients over the age of 40 years (C)</p> Signup and view all the answers

What is the most common type of fracture associated with posterior dislocations of the shoulder?

<p>Impaction fracture of the humeral head (B)</p> Signup and view all the answers

What is the frequency of recurrent dislocation in patients under the age of 20 with shoulder dislocation?

<p>80% (B)</p> Signup and view all the answers

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