[H reflex in the diagnosis of lumbosacral nerve root entrapment].
This article was to obtain the normal values of H reflex and verify its reliability. The normal values for the H reflex were obtained from 103 healthy subjects. Statistical analysis was performed using stepwise regression. If the practical time interval H-M in ms was higher 1.8ms than the estimate, this S1 root was considered as abnormality. According to this normal value, we obtained 89% accuracy in 28 S1 roots compression when compared with operative findings. For this group patients, the myelography achieved an accuracy of 86%, the accuracy of CT was 72%. The diagnostic index of this diagnostic method was 176. Our investigation suggests that H reflex latency testing is a valuable tool in helping to diagnosing S1 root entrapment.
Wang
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Third Hospital, Beijing Medical University.
Dang
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GD
D000293:Adolescent; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D005260:Female; D006181:H-Reflex / Q000502:physiology*; D006801:Humans; D008161:Lumbosacral Region; D008297:Male; D008875:Middle Aged; D009408:Nerve Compression Syndromes / Q000175:diagnosis*; D012016:Reference Values; D013126:Spinal Nerve Roots / Q000503:physiopathology*