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在80年代初期,有文献报道应用神经肌肉电刺激(NMES)能改变周围血流动力学,并显示供给受刺激肌肉的动脉血流增加,未受刺激肢体的动脉血流减少,但并不了解其微血管床的具体反应.血流量与血流速度和灌流血管的横截面积成正比,但血流速度不能反应血液与实质组织的空间关系,而灌流血管的横截面积或微血管灌流程度可指示扩散距离、血液和实质组织的空间关系。肌肉微血管灌流程度是实质组织的氧、营养物质和代谢物的扩散距离为指示物,微血管灌流增加,则扩散距离减少,因而提高肌肉对氧、营养物质的利用,并提高代谢产物的清除率。供血与肌肉组织之间的扩散距
In the early 1980s, it was reported in the literature that application of neuromuscular electrical stimulation (NMES) altered peripheral hemodynamics and showed increased arterial blood flow to the stimulated muscle and decreased arterial blood flow in the unstimulated limbs, but did not understand The specific response of the microvascular bed, which is proportional to the velocity of the blood flow and the cross-sectional area of the perfused vessel, but the velocity of the blood flow does not reflect the spatial relationship of the blood to the parenchymal tissue, whereas the cross-sectional area of the perfusion vessel or the degree of microvascular perfusion can indicate Diffusion distance, spatial relationship between blood and parenchyma. Muscle microvascular perfusion is the degree of tissue oxygen, nutrients and metabolites diffusion distance as an indicator of microvascular perfusion increases, the diffusion distance decreases, thereby increasing the use of oxygen to the muscles, nutrients, and increase the clearance rate of metabolites. Diffusion between blood and muscle tissue