Nagami K
Department of Physiology, School of Medicine, Tokai University, Kanagawa, Japan.
Tokai J Exp Clin Med. 1990 Mar;15(1):35-44.
The present study was designed to clarify the venous return, filling velocity (Maximum Inflow Rate: MIR), and post-contraction hyperemia following brief concentric contractions of human calf muscles, using a double-stranded mercury-in-silastic gauge. The subject, in a prone position, extended the right ankle joint to 5, 10, 15, and 20 degrees at 20 degrees.sec-1 with a load of 20% of maximum voluntary contraction in ankle extensors. There was a significant relation between increase in calf girth at contraction and the amount of decrease, increase, total change (decrease plus increase), and MIR in calf volume after relaxation, and also between the MIR and amount of decrease, increase and total change in calf volume. The amplitude of the volume pulse wave apparently increased immediately after muscle relaxation, then progressively decreased. The maximum value appeared with the greatest increase in ankle extension. It was found that with increased muscle contraction, there was accelerated venous return, filling velocity of blood, and post-contraction hyperemia. Pulsatile blood flow into muscle tissue after brief muscle contractions might be qualitatively measured by the amplitude of the volume pulse wave.
本研究旨在使用双链硅橡胶汞应变计，阐明人体小腿肌肉短暂等长收缩后的静脉回流、充盈速度（最大流入速率：MIR）和收缩后充血情况。受试者俯卧，在踝关节伸肌最大自主收缩量20%的负荷下，以20度·秒⁻¹的速度将右踝关节伸展至5度、10度、15度和20度。收缩时小腿围度的增加与放松后小腿体积的减少量、增加量、总变化量（减少量加增加量）和MIR之间存在显著关系，MIR与小腿体积的减少量、增加量和总变化量之间也存在显著关系。肌肉放松后，体积脉搏波的幅度明显立即增加，然后逐渐减小。最大值出现在踝关节伸展增加最大时。研究发现，随着肌肉收缩增加，静脉回流、血液充盈速度和收缩后充血加速。短暂肌肉收缩后进入肌肉组织的搏动性血流可通过体积脉搏波的幅度进行定性测量。
