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Shoulder dislocation

Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]; Associate Editor(s)-in-Chief: Jumana Nagarwala, M.D., Senior Staff Physician, Department of Emergency Medicine, Henry Ford Hospital; Cafer Zorkun, M.D., Ph.D. [2]

Overview

Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]; Associate Editor(s)-in-Chief: Jumana Nagarwala, M.D., Senior Staff Physician, Department of Emergency Medicine, Henry Ford Hospital; Cafer Zorkun, M.D., Ph.D. [2]

Overview

A shoulder dislocation usually occurs as a result of force to a joint. The bone is pushed out of the socket, which may cause damage to the surrounding ligaments, tendons, and nerves.

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Historical Perspective

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Classification

Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]; Associate Editor(s)-in-Chief: Jumana Nagarwala, M.D., Senior Staff Physician, Department of Emergency Medicine, Henry Ford Hospital; Cafer Zorkun, M.D., Ph.D. [2]

Classification

Anterior dislocation is usually the result of direct or indirect trauma, with the arm forced into abduction and external rotation. It is the most frequent type of shoulder dislocation (represents more than 90% of injuries).

In posterior dislocation, the humeral head is forced posteriorly in internal rotation. Posterior dislocations account for 2%–4% of all shoulder dislocations. In adults, convulsive disorder is the most common cause. Electrocution is a classic but uncommon cause of posterior shoulder dislocation. Bilateral dislocations are not infrequent.

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Pathophysiology

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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]; Associate Editor(s)-in-Chief: Jumana Nagarwala, M.D., Senior Staff Physician, Department of Emergency Medicine, Henry Ford Hospital; Cafer Zorkun, M.D., Ph.D. [2]

Pathophysiology

Associated Conditions

  • Hill-Sach lesions (describes a characteristic defect of the posterolateral surface of the humeral head, and represents a compression fracture)
  • Labral lesions (i.e., Bankart lesion)
  • Bony glenoid lesions – Osseous anterior glenoid rim fractures (44%), bony Bankart lesions, fracture of the greater tuberosity
  • Intraarticular loose body
  • Rotator cuff lesions – Supraspinatus tears or subscapularis tears

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Causes

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Differentiating Shoulder Dislocation from other Conditions

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Epidemiology and Demographics

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Risk Factors

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Natural History, Complications and Prognosis

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Diagnosis

Diagnosis

History and Symptoms | Physical Examination | Laboratory Findings | X Ray | CT | MRI | Ultrasound | Other Imaging Findings | Other Diagnostic Studies

Treatment

Treatment

Medical Therapy | Surgery | Primary Prevention | Secondary Prevention | Cost-Effectiveness of Therapy | Future or Investigational Therapies

Case Studies

Case Studies

Case #1


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