单纤维肌电图中抖动计算所需的最佳迹线计数。

Optimum trace count necessary for jitter calculation in single-fiber electromyography.

作者信息

Baslo M B, Yalinay P, Yildiz N, Ertaş M

机构信息

Department of Neurology, Istanbul University, Istanbul Faculty of Medicine, Capa, Istanbul, 34390, Turkey.

出版信息

Acta Neurol Scand. 2003 Oct;108(4):262-6. doi: 10.1034/j.1600-0404.2003.00120.x.

DOI:10.1034/j.1600-0404.2003.00120.x

PMID:12956860

Abstract

OBJECTIVE

To clarify the optimum trace count for jitter calculation.

MATERIALS AND METHODS

Single-fiber electromyography was performed during voluntary contraction (VC-SFEMG) of extensor digitorum muscle in six healthy and five myasthenic subjects. Twenty single-fiber action potential (SFAP) pairs were recorded from each subject. For each pair, 100 consecutive traces were recorded and stored for off-line analysis. Ten different jitters were calculated in 10 consecutive steps for each SFAP pair by increasing the number of traces included to analysis (from 10 to 100). The jitter calculated in each step was compared with that calculated from 100 traces.

RESULTS

Sixty was the optimum number of trace count for both myasthenics and normal controls. Using less than 60 traces for jitter calculation revealed lower values.

CONCLUSION

Jitter calculation should be performed from at least 60 traces in VC-SFEMG. Less numbers yield lower jitter and may cause diagnostic error.

摘要

目的

明确用于抖动计算的最佳迹线数量。

材料与方法

对6名健康受试者和5名重症肌无力受试者的指伸肌进行随意收缩时的单纤维肌电图检查（VC-SFEMG）。从每位受试者记录20对单纤维动作电位（SFAP）。对于每一对，记录并存储100条连续的迹线用于离线分析。通过增加纳入分析的迹线数量（从10条到100条），对每对SFAP以10个连续步骤计算10种不同的抖动。将每个步骤中计算出的抖动与从100条迹线计算出的抖动进行比较。