Median Versus Ulnar Sensory and Motor Latency Difference in Early Diagnosis of Carpal Tunnel Syndrome

Aim: This study proposed to detect sensitivity of different electrophysiological techniques in early diagnosis of Carpal Tunnel Syndrome (CTS) compared to the standard technique as Median Sensory Latency.   Methods and Instrument: The present study included ۷۰ hands (۴۰ hands with clinical evidence of idiopathic CTS and ۳۰ hands as control group). The following tests were done for both groups: ۱- Sensory nerve conduction study: median nerve, ulnar nerve, median versus ulnar latency difference between second and fifth digits, median versus ulnar latency difference (ring finger)  ۲- Motor nerve conduction study: median nerve, ulnar nerve, median versus ulnar motor latency difference. Findings: The most sensitive (۹۲%) two tests were median-ulnar sensory latency difference recorded from second and fifth digits and median-ulnar sensory latency difference recorded from fourth digit, while median-ulnar motor latency difference and median motor latency showed lowest sensitivity  (۶۱, ۵۳%) respectively.  Conclusion: Median-ulnar sensory latency difference recorded from digit two and digit five and that recorded from digit ۴ have highest sensitivity for early detection of CTS.   Keywords:  Carpal Tunnel Syndrome; Median Versus Ulnar Latency Differences; Nerve Conduction Study.  

کلیدواژه ها:

Carpal Tunnel Syndrome ، Median Versus Ulnar Latency Differences ، Nerve Conduction Study.