Mier A, Brophy C
Department of Respiratory Muscle Physiology, Royal Brompton and National Heart Hospital, London.
Thorax. 1991 Sep;46(9):669-70. doi: 10.1136/thx.46.9.669.
The transdiaphragmatic pressure (Pdi) generated during bilateral supramaximal phrenic nerve stimulation at 1 Hz from surface stimulating electrodes was compared with pressures obtained from needle electrodes inserted under local anaesthesia. Surface electrodes were used to obtain diaphragmatic electromyograms and magnetometers to monitor rib cage and abdominal configuration. Twitch Pdi was recorded at functional residual capacity in three normal subjects. Mean (SD) twitch Pdi in the three subjects during stimulation with surface electrodes was 19.4 (1.8), 22.5 (1.1), and 29.3 (2.2) cm H2O compared with 12.9 (1.5), 17:4 (1.3), and 22.6 (3.0) cm H2O with needle stimulating electrodes. Thus phrenic nerve stimulation with needle electrodes was more complicated and more invasive than stimulation with surface electrodes and resulted in lower transdiaphragmatic pressures.
将通过表面刺激电极以1赫兹频率进行双侧超最大膈神经刺激时产生的跨膈压（Pdi）与在局部麻醉下插入针电极所获得的压力进行比较。使用表面电极获取膈肌肌电图，并使用磁力计监测胸廓和腹部形态。在三名正常受试者的功能残气量下记录抽搐Pdi。在三名受试者中，使用表面电极刺激时的平均（标准差）抽搐Pdi分别为19.4（1.8）、22.5（1.1）和29.3（2.2）厘米水柱，而使用针刺激电极时分别为12.9（1.5）、17.4（1.3）和22.6（3.0）厘米水柱。因此，与表面电极刺激相比，针电极膈神经刺激更复杂、侵入性更强，且导致更低的跨膈压。
