A client is concerned about developing carpal tunnel syndrome. Which screening technique should the nurse perform to provide the client with useful information?

A. Contractures of the 4th and 5th fingers are more indicative of ulnar nerve involvement, not median nerve compression. Carpal tunnel syndrome primarily affects the thumb, index finger, middle finger, and part of the ring finger. Thus, asking about contractures of the 4th and 5th fingers would not provide useful information about carpal tunnel syndrome. B. This technique is used to assess the patency of the radial and ulnar arteries, commonly referred to as the Allen test. It is used to evaluate blood flow in the hand, particularly before performing procedures that may impact arterial circulation. This test is not specific to carpal tunnel syndrome and does not provide useful information about median nerve compression. C. While comparing the hands bilaterally for various signs can be useful in assessing general hand function and circulation, this method does not specifically target the symptoms or diagnostic tests associated with carpal tunnel syndrome. It provides a broad overview but is not specific enough to confirm CTS. D. This technique is known as the Phalen’s test, which is specifically used to assess for carpal tunnel syndrome. During the Phalen’s test, the client is asked to flex their wrists and hold the position for about 60 seconds. If the client experiences tingling, numbness, or pain in the median nerve distribution (thumb, index, middle finger, and part of the ring finger), it suggests carpal tunnel syndrome.