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Square Wrist Sign

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Other Names

  • Square Wrist Sign


  • To help characterize the size of the wrist pain patients with suspected median neuropathy or carpal tunnel syndrome


Measurements of the square wrist test with anterior-posterior (D) and medial-lateral (C)[1]
  • Patient is seated or standing
  • Measure anterior-posterior dimension of the wrist (at the distal wrist crease)
  • Measure the medio-lateral dimension
  • Positive Test:
    • The ratio of the wrist thickness to the wrist width is greater than 0.7.



Carpal Tunnel Syndrome

  • Kulman et al[2], Radecki et al[3]
  • Sensitivity: 47 - 69%
  • Specificity: 73 - 83%

See Also


  1. Kamolz, L-P., et al. "Carpal tunnel syndrome: a question of hand and wrist configurations?." Journal of hand surgery 29.4 (2004): 321-324.
  2. Kuhlman KA, Hennessey WJ. Sensitivity and specificity of carpal tunnel syndrome signs. Am J Phys Med Rehabil. 1997;76(6):451–7.
  3. Radecki P. A gender specific wrist ratio and the likelihood of a median nerve abnormality at the carpal tunnel. Am J Phys Med Rehabil. 1994;73(3):157–62
Created by:
John Kiel on 10 October 2019 14:33:35
Last edited:
21 May 2023 17:45:41