Pollmaecher T, Steiert H, Buzello W
Br J Anaesth. 1986 Dec;58(12):1443-6. doi: 10.1093/bja/58.12.1443.
A pocket-size, battery-powered peripheral nerve stimulator featuring a calibrated constant current floating output (max. 80 mA) was evaluated in unanaesthetized volunteers. Modes of stimulation included continuous 1 Hz, continuous train-of-four every 15 s, and on-demand tetanus (50 Hz per 5 s). Within the limits of 0-250 V, voltage adjusted automatically for 0.2-ms monophasic square pulses. Between 20 and 80 mA, the dial error of current intensity was less than +/- 5%. Maximum allowable resistance for the generation of 40-mA pulses was 5 k omega--that is five times the average tissue impedance as measured in 15 volunteers. With surface electrodes, the current intensity required for maximal indirect muscle stimulation in another 50 individuals was 38 +/- 23 mA (mean +/- SD). With up to 80 mA stimulus current, supramaximal nerve stimulation was obtained in 94% of the volunteers.
一款袖珍、电池供电的外周神经刺激器，具有校准的恒流浮动输出（最大80 mA），在未麻醉的志愿者身上进行了评估。刺激模式包括连续1 Hz、每15秒连续四个成串刺激以及按需强直刺激（每5秒50 Hz）。在0 - 250 V范围内，自动调整电压以产生0.2毫秒的单相方波脉冲。在20至80 mA之间，电流强度的刻度误差小于±5%。产生40 mA脉冲的最大允许电阻为5 kΩ，即15名志愿者测量的平均组织阻抗的五倍。使用表面电极时，另外50名个体最大间接肌肉刺激所需的电流强度为38±23 mA（平均值±标准差）。在高达80 mA的刺激电流下，94%的志愿者获得了超强神经刺激。
