Abstract
Background: Carpal tunnel syndrome (CTS) is the commonest median nerve entrapment neuropathy with preponderance in females.

Aims & Objective: The present study was carried out for early conformation of clinically diagnosed patients of Carpal Tunnel Syndrome (CTS) by electrodiagnostic tests which include motor conduction, sensory conduction, and F-wave studies.

Materials and Methods: Early confirmation of clinically suspected patients of CTS by performing electrodiagnostic tests of median and ulnar nerves. 100 subjects of age group 30-50 years (50 clinically suspected patients of CTS, 50 as control group) were studied. Motor and Sensory conduction velocities, distal motor and sensory latencies and F wave latencies were performed using Medtronic Keypoint@ 2 EMG EP software.

Results: Statistically significant (P<0.001) slowing of motor conduction velocities for median nerve was seen in the CTS group as compared to control group. Statistically significant (P<0.001) increase in distal motor and sensory latencies was observed for both median and ulnar nerves in CTS group with more increase in distal motor latency than sensory latency. Increase in F wave latencies of both nerves was seen in CTS group.

Conclusion: Electrophysiological studies confirmed the early diagnosis of CTS with a high degree of sensitivity. Present results confirm selective slowing of sensory and motor conduction within wrist to palm segment in patients of CTS due to compression by the transverse carpel ligament or to disease process of terminal segment.

Key words: Carpal Tunnel, Distal latencies, Electrophysiological diagnosis, Nerve entrapments.