Torry M, Wilcock A, Cooper B G, Tattersfield A E
Respiratory Medicine Unit, City Hospital NHS Trust, Nottingham, UK.
Respir Physiol. 1996 Apr-May;104(1):23-8. doi: 10.1016/0034-5687(95)00100-x.
We studied the effects of transcutaneous electrical nerve stimulation (TENS) over the chest wall on breathlessness in normal subjects during exercise. Eleven male subjects performed a progressive incremental exercise test to break point on four consecutive days. TENS (continuous form, frequency 100 Hz, pulse width 200 microseconds) was applied during three of these tests-over the second intercostal spaces during inspiration ('in phase' with the underlying inspiratory muscle contraction) or expiration ('out of phase' with contraction) or over the deltoid muscles during inspiration (control), and not on the fourth occasion in random order. Breathlessness (Borg scale), heart rate, respiratory frequency, tidal volume, minute ventilation and minute oxygen uptake were measured. No significant differences were found for any of the measured variables between the four study days. We conclude that TENS under these circumstances has no effect on the sensation of breathlessness or on the measured physiological variables in normal subjects during exercise.
我们研究了经皮电刺激神经（TENS）作用于胸壁对正常受试者运动期间呼吸困难的影响。11名男性受试者连续四天进行递增运动试验直至极限。在其中三次试验中施加TENS（连续模式，频率100赫兹，脉冲宽度200微秒）——在吸气时施加于第二肋间间隙（与潜在的吸气肌收缩“同步”）或呼气时（与收缩“不同步”），或在吸气时施加于三角肌（对照），第四次试验不施加，顺序随机。测量了呼吸困难程度（Borg量表）、心率、呼吸频率、潮气量、分钟通气量和分钟摄氧量。四个研究日之间，所测量的任何变量均未发现显著差异。我们得出结论，在这些情况下，TENS对正常受试者运动期间的呼吸困难感觉或所测量的生理变量没有影响。
