Final answer:
A positive Phalen's sign is a diagnostic test for carpal tunnel syndrome, indicating the presence of the condition.
Step-by-step explanation:
A positive Phalen's sign is a diagnostic test for carpal tunnel syndrome. It is not a treatment, nor does it indicate the absence of carpal tunnel syndrome. When performing the Phalen's test, the patient flexes their wrist and holds this position for one minute. If tingling or numbness is experienced in the thumb, index, and middle fingers within this timeframe, it is considered a positive Phalen's sign and may indicate the presence of carpal tunnel syndrome.