II. Mechanism

  1. Occlusion of ulnar artery at the wrist
    1. Secondary to thrombosis of ulnar artery
  2. Due to repetitive Trauma to ulnar hand
    1. Example: hand is used as a hammer

III. Symptoms

  1. Hypothenar pain and pallor
  2. Hypothenar Paresthesias
  3. Affected digits are cool

IV. Signs

  1. Localized tenderness at hypothenar prominence
  2. Abnormal Allen Test

V. Differential Diagnosis

  1. Ulnar Tunnel Syndrome

VI. Management

  1. Eliminate precipitating factors
  2. Surgical resection of thrombosed section of vessel
    1. Indicated for persistent symptoms

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