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%</p> Signup and view all the answers

    What is a common cause of posterior dislocation?

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

    What is a key clinical feature of posterior dislocation?

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

    Which type of radiograph is better for diagnosing posterior dislocation?

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

    What is the usual treatment for glenohumeral dislocation?

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

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

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

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

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

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