摘要
目的再评价潜伏期、节段距离的测量误差对神经传导速度(NCV)的影响,以确定神经传导检测的最佳距离。方法选取健康成年人行尺神经运动传导检测,分别在腕部和肘下刺激,20名检测者分别独立测量运动潜伏期和传导距离,计算传导时间和传导距离的平均值。将获得的Δt(平均传导时间标准差的2倍值)、Δd(平均传导距离标准差的2倍值)代入公式ΔC=C×(Δt/T+Δd/D),建立数学模型。不同的神经节段长度(D)和NCV(C)作为变量代入公式(其中T=D/C),以理论推导各种情况下的NCV误差(ΔC)。结果健康成年人尺神经运动传导检测,肘下腕节段传导时间为(3.71±0.08)ms,距离为(229.85±2.28)mm。数学模型推导表明:当神经节段距离缩短,NCV误差(考虑检测误差存在,神经传导速度与实际情况相比的误差)增大。当节段距离在6cm时,只要NCV不高于65m/s,NCV误差就低于25%。结论在设备条件更新和整体误差水平下降的情况下,短于10cm的节段距离可用于神经传导检测并使误差水平控制在25%左右,最适距离在6cm左右。
Objective To reestablish the optimal distance using current technology.Methods 20 physicians measured the proximal and distal onset latencies of the same stored ulnar compound muscle action potentials,as well as the forearm skin distance.The mean and standard deviation of the errors in conduction time and distance were determined.A spreadsheet was constructed,determining the error in NCV for a variety of distances and NCVs.Results The average conduction time between proximal and distal stimulation was 3.71 ms,with a standard deviation of 0.08 ms.The mean distance measurement was（229.85±2.28） mm.The experimental error increased as distance decreased.In our study,the experimental error in conduction velocity does not exceed 25% for conduction velocities less than 65 m/s even at distances as short as 6 cm.Conclusion With advances in electrodiagnostic equipment,NCV can reasonably be calculated at distances less than 10 cm,perhaps as low as 6 cm.
出处
《海南医学》
CAS
2011年第11期9-11,共3页
Hainan Medical Journal
关键词
最佳距离
神经传导检测
肌电图
Optimal distance
Nerve conduction studies
Electromyography
