Neurophysiological classification and sensitivity in 500 carpal tunnel syndrome hands

• Published in: Acta Neurologica Scandinavica
• Main Authors: Padua, L, Lomonaco, M, Gregori, B, Padua, R, Tonali, P., VALENTE, ENZA MARIA
• Other Authors: Valente, ENZA MARIA
• Format: Article in Journal/Newspaper
• Language: English
• Published: 1997
• Subjects: DML
• Online Access: http://hdl.handle.net/11571/1180703; https://doi.org/10.1111/j.1600-0404.1997.tb00271.x

Objectives - To evaluate the following points about carpal tunnel syndrome (CTS): 1) characterization of a wide population; 2) sensitivity of electrodiagnostic tests, and particularly the contribution of disto-proximal ratio test; 3) validity of a neurophysiological classification developed by us. Material and methods - Prospective study in 500 hands with CTS symptoms. Neurophysiological ''standard'' tests were always performed: sensory nerve conduction velocity (SNCV) first- and third digit-wrist and distal motor latency (DML). In ''standard negative'' hands disto-proximal ratio technique (R) was performed. Neurophysiological classification: Extreme CTS (absence of median motor, sensory responses), Severe (absence of sensory response, abnormal DML), Moderate (abnormal SNCV, abnormal DML), Mild (abnormal SNCV, normal DML), Minimal (abnormal R or other segmental/comparative test, normal standard tests). Results - Sensibility of standard tests: 77%. R increased the diagnostic yield by 20%. CTS classification appeared reliable with significant differences between groups. Conclusion - R is a useful test, the classification may be useful in clinical/therapeutical decisions.