Phalen’s Test: Interpretation and Limitations

What does Phalen’s test assess?

The test places the wrist in sustained flexion to see whether this provokes altered sensation in the median nerve distribution. It is a symptom-provocation manoeuvre, rather than a direct measurement of nerve damage or the amount of compression within the carpal tunnel. Its usual target is tingling or numbness extending into the hand, not simply discomfort from bending the wrist. (Zhang et al., 2020.)

How is the test performed?

Explain the purpose, obtain consent and establish which symptoms are already present. In a commonly used version, the client brings the backs of their hands together, allowing the wrists to flex with the fingers pointing down. The position is held for up to 60 seconds. Published protocols vary, so record the position and duration used. Do not force a painful or restricted wrist into the test position. (Zhang et al., 2020.)

Ask the client to describe what they feel and where they feel it. Release the position when the relevant symptoms appear, if discomfort becomes excessive or if the client wishes to stop. Completing the full minute is unnecessary once the response has been established. Use the manoeuvre only within your training and scope of practice.

What counts as a positive finding?

A positive response involves reproduction of paraesthesia, such as pins and needles, in the median nerve distribution. This commonly involves the thumb, index and middle fingers and the thumb-side half of the ring finger. Check whether the sensation resembles the client’s usual complaint. Local wrist aching or a stretch across the back of the hand should be documented separately rather than automatically labelled positive. (Zhang et al., 2020; AAOS, OrthoInfo.)

Ask an open question such as “Where did you notice that?” before suggesting a finger or symptom. A drawing of the affected area can make the finding easier to interpret later. If the wrist cannot comfortably reach the chosen position, document the test as limited rather than presenting it as a standard negative result.

How accurate is it?

Dabbagh and colleagues’ 2023 systematic review reported pooled sensitivity of 57% and specificity of 67% for the Phalen test, based on seven studies. Estimates were imprecise and varied between studies. These findings support cautious interpretation rather than treating the manoeuvre as a reliable stand-alone answer. (Dabbagh et al., 2023.)

Sensitivity describes how often a test identifies people who have the condition. Specificity describes how often it is negative in people who do not. Neither figure tells you the probability that this particular client has carpal tunnel syndrome. That judgement also depends on the history, examination and clinical setting.

Putting the result into context

Consider two hypothetical clients with a positive response. One describes familiar night-time tingling and difficulty with small hand tasks. The other reports a new sensation only while holding an uncomfortable test position. Recording both simply as “Phalen positive” loses the information that makes their presentations different.

Ask about symptom duration, affected fingers, sleep disturbance and changes in everyday function. The 2024 AAOS guideline supports the CTS-6, which combines several clinical features, rather than relying on one provocative manoeuvre. This does not mean that every manual therapist should use a diagnostic scoring tool beyond their training. It reinforces the value of a structured assessment. (AAOS, 2024.)

When further assessment matters

Persistent numbness, increasing weakness or visible wasting around the base of the thumb warrant prompt medical assessment. A negative wrist-flexion test should not delay referral when the history or functional changes are concerning. Nor should a positive result be used to justify deep pressure intended to “release” the nerve. The test does not identify which treatment will help. (AAOS, OrthoInfo.)