Concentric needle single fiber electromyography in carpal tunnel syndrome / Aliaa Ali Tawfeek Hussein ; Supervised Saly Hassan Elkholy , Lamiaa Medhat Afifi , Amani Mahmoud Nawito

Thesis (Ph.D.) - Cairo University - Faculty of Medicine - Department of Neurophysiology

To assess CTS suspected patients; in whom the routine nerve conduction studies are inconclusive, if concentric needle single fiber EMG could help in confirming the diagnosis?. Sixty subjects were studied, thirty controls,with a mean age of 30.7±5.9 years, and thirty patients with a mean age of 35.4±7.8 years with early starting or mild degree of CTS. Sensorimotor nerve conduction studies of the median and ulnar nerves and conventional needle EMG examination for the abductor pollicis brevis (APB), abductor digiti minimi (ADM) and extensor digitorum communis (EDC) muscles using concentric needle were peformed. Single fiber electromyography for the APB, ADM and EDC muscles was obtained in the control and patients groups by the volitional technique using a disposable facial concentric needle In comparing the patients to the control groups; the motor nerve conduction studies showed statistically significant P value as regards median distal latency (0.000) and amplitude (0.046), while the sensory studies showed significant P value as regards median onset (0.000) and peak latency (0.000), median amplitude (0.003) and conduction velocity (0.000), and the difference between median and ulnar sensory peak latencies (0.000). Only the mean consecuative difference (MCD) of the APB muscle showed a significant difference between the patients and control groups 28.1±3.0 vs 23.6±2.5 P value 0.001

Issued also as CD