경피적 전기 신경 자극 전후에 시행한 H-반사 측정치 변화값의 검사자간 변이 = Inter-examiner Variability of H-reflex Changes by Transcutaneous Electrical Nerve Stimulation

다국어 초록 (Multilingual Abstract)

Background : This study was designed to research the inter-examiner variability of H-reflex changes by the transcutaneous electrical nerve stimulation (TENS).
Materials and Methods : The H-reflexes were recorded in a healthy subjects by a standardized method of Braddom and Johnson. Electromyelogram was performed on a healhty man by 30 examiners. A healthy man were stimulated by TENS for 20 min. The onset latency, amplitude, and H/M ratio of H-reflex were measured before, and immediately, after TENS. Statistical analysis was done with paired t-test and student t-test of SPSS for windows (version 11.0).
Result : Onset latency of H-wave and M-wave was significantly delayed immediately after TENS (p<0.05) but H-amplitude, M-amplitude and H/M ratio was not significantly changed (p>0.05). Onset latency of H-wave showed no inter-examiner bias (p>0.05), but H-amplitude, M-amplitude and M-latency showed inter-examiner bias on repeated test (p<0.05).
Conclusion : In the H-reflex measurements, only H-latency showed no inter-examiner bias. These results suggest that H-latency can be used as a experimental value, but not H-amplitude, M-amplitude and M-latency. And H- reflex measurements should optimally be performed by a skilled examiner to minimize the degree of variability associated with different examiner.