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50年代的研究提出电刺激(ES)能增加动物的血流量。Randall 等人观察了四种使狗血流量增加的ES 方式,即:(1)强直电流;(2)快脉冲电流〔每秒14次脉冲(PPS)〕;(3)中脉冲电流(7PPS);(4)起伏电流。所有ES 方式都使狗血流量增加。Wa-kim 研究了ES 的各种不同频率(4～256PPS)对狗刺激肢体血流的影响,发现16PPS 时,受刺激肌的血流增加最大;8和32 PPS 时,
In the 1950s, electrical stimulation (ES) increased blood flow in animals. Randall et al. Observed four ES modalities that increased dog blood flow: (1) intense current; (2) fast pulsed current [14 pulses per second (PPS)]; (3) medium pulsed current ; (4) ups and downs current. All ES methods increase dog blood flow. Wa-kim studied the effects of ES at various frequencies (4 to 256 PPS) on dog blood flow stimulation and found that muscle stimulation increased most significantly at 16 PPS; at 8 and 32 PPS,