低强度中频电刺激健康男性腰交感神经节后下肢远端皮肤血流的改变

Effects of an intermediate-frequency stimulation with low intensity to lumbar sympathetic ganglion on distal skin blood stream in the lower extremity of healthy males

背景:飞行人员由于长时间保持固定坐姿,腿部活动范围受限,易引起腿部血液循环不畅,产生疲劳感。研究显示中频电流具有明显的促进局部血液循环的作用。目的:探讨低强度中频电刺激腰交感神经节对健康男性下肢远端皮肤血液循环的影响,并与静态干扰电疗法作比较。方法:在39名健康男性腰部交感神经节(T10～L2)放置中频电电极,右内踝关节上方2cm处放置激光多普勒血流监测仪探头,电流强度为感觉阈。分别给予调制中频电刺激、静态干扰电刺激及不通电刺激。激光多普勒血流监测仪记录静息15min后及电刺激20min末的血流值。结果与结论:与基线值比较,经调制中频电刺激的受试者下肢远端皮肤血流灌注量有所增加,而未给予电刺激及静态干扰电刺激的受试者下肢远端皮肤血流灌注量有所减少,尤其是经静态干扰电刺激后,明显低于基线值(P<0.05)。说明调制中频电刺激可以改善下肢的血液循环,对长时间保持固定坐姿产生的疲劳有缓解功能。

BACKGROUND：Pilots,especially fight pilots,have to maintain a fixed position for a long time,so the scope of legs＇ activities is limited,easily causing the bad blood circulation of legs.Thus,it causes muscle soreness and the feeling of tiredness.Previous studies found that intermediate frequency electric can promote local blood circulation significantly.OBJECTIVE：To explore the effect of low intensity of medium frequency electric stimulating on lumbar osympathetic ganglia of the healthy males,and compare the outcomes with static interferential electrotherapy.METHODS：A total of 39 healthy men were randomly divided into three groups.On the lumbar sympathetic ganglion （T10-L2） placed the electrodes,and above the right ankle 2-cm put laser doppler probe.The current intensity was sensory threshold.The subjects accepted modulated medium frequency current stimulation,static interferential current stimulation,or no stimulation.The skin blood flow after 15minutes of resting and at the end of electrical stimulation was recorded.RESULTS AND CONCLUTION：Compared with the baseline,the amount of blood on distal lower extremity flow of modulated medium frequency current group was increased after the electric stimulating.However,it was decreased in the static interferential current group and the control group,especially the static interferential current group,which was obviously lower than the baseline （P0.05）.The findings demonstrated that modulated medium frequency current stimulation can improve blood circulation in lower extremity and relieve fatigue caused by a long-time fixed position.