健康人膈神经根传导时间初探

A primary study of phrenic nerve root conduction time in healthy subjects

目的 初步摸索检测膈神经根传导时间的方法及其在健康人的特点。方法 以表面电极记录 31位健康受试者的 61侧经项磁刺激膈神经根和经颈电刺激膈神经所得的远端运动潜伏期的差。结果 膈神经根传导时间不存在性别及侧别间差异 ,与年龄和身高间不相关。合并不同性别和侧别后健康人的正常值为 (1 .4± 0 .3)ms。结论 膈神经根传导时间是评价与呼吸有关的颈神经根功能的不可缺少的电生理指标。磁刺激膈神经根方法的引入使这一检测易为受试者接受 。

Objective To explore the method for testing phrenic nerve root conduction time (PNRCT) and its presentation in healthy people. Methods Distal motor latency(DML) was recorded during electrical stimulation of the phrenic nerve.Likewise, the phrenic nerve root latency(PNRL) was recorded by stimulating its nerve root magnetically. Parameters from 61 sides in 31 healthy subjects were then calculated and analyzed. Results No statistical PNRCT difference was found between the tested sides and different sexes. There was no correlation between PNRCT and the parameters of human body indices such as age,height, etc. The PNRCT of the healthy subjects was around 1.4ms±0.3ms, irrespective of different side and sex. Conclusion PNRCT is an essential index to evaluate the involving nerve root function during respiration. It makes the test more acceptable by using magnetic stimulation of phrenic nerve root rather than electric one. However, electric stimulation of phrenic nerve is easier to perform than the magnetic one.