What is the role of the Phalen sign in the diagnosis of carpal tunnel syndrome (CTS)?

Updated: Mar 30, 2020
  • Author: Nigel L Ashworth, MBChB, MSc, FRCPC; Chief Editor: Milton J Klein, DO, MBA  more...
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Phalen sign

  • Tingling in the median nerve distribution is induced by full flexion (or full extension for reverse Phalen) of the wrists for up to 60 seconds

  • This test has 80% specificity but lower sensitivity.

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