Carpal tunnel syndrome
A "trapped nerve" at the wrist caused by pressure on the median nerve (nervus medianus).
- Cause
- The carpal bones and a ligament stretched across them form a narrow channel at the wrist for the median nerve. The exact cause of the compression is unknown — manual work, injuries and pregnancy are considered contributing factors.
- Symptoms
- CTS initially makes itself felt at night: pain in the fingers, radiating up to the elbow, plus numbness of the thumb, index and middle fingers. Later, difficulty gripping, loss of strength and wasting of the thumb-ball muscles follow.
- Treatment
- Non-surgical treatments offer no lasting success. Surgical treatment delivers very good results: through a 3–4 cm skin incision, the carpal ligament is divided (open technique), relieving pressure on the nerve and freeing it from adhesions. The complication rate is well below 1%.
