The nurse suspects that the patient has carpal tunnel syndrome and wants to perform the Phalen test. How should the nurse instruct the patient?

A. Hold hands back-to-back while flexing the wrists to 90 degrees for 60 seconds: This position increases pressure within the carpal tunnel and compresses the median nerve against the flexor retinaculum. The test is considered positive if the patient experiences numbness or tingling in the median nerve distribution. It is a specific diagnostic maneuver for entrapment. B. Press the palms together for 2-3 seconds: This action does not provide the necessary mechanical compression of the median nerve required for a provocative neurological test. Brief palm pressing lacks the specific anatomical positioning needed to elicit symptoms of nerve compression. It is not a recognized maneuver for carpal tunnel. C. Interlace the metacarpals for 2-3 seconds: Interlacing the fingers or metacarpals does not put the carpal tunnel under sufficient stress to reproduce neurological symptoms. This movement does not target the median nerve at the wrist joint. It is an irrelevant action for diagnosing upper extremity nerve entrapment syndromes. D. Internally rotate the shoulders, pressing the hands into the back: This movement assesses the internal rotation of the glenohumeral joint and the integrity of the rotator cuff. It has no diagnostic value for conditions affecting the distal upper extremity or the median nerve. It is used for shoulder rather than wrist evaluations.