成人肾小球血管结构参数

Structural Parameters of Renal Glomerulus in Human

以形态学和数学的方法,研究了10例正常成人肾的肾小球结构参数,在扫描电镜和光镜下测量了300个肾小球直径,50个肾小球的表面结点数、结点间距、毛细血管直径以及不同直径毛细血管比例,并进行了相应计算。实验结果:正常成人肾小球直径平均为159.74±10.21μm;每个肾小球约有340个结点,620支毛细血管;一个肾小球毛细血管总长度约为17,300μm,总面积500,000μm^2,总容积1,260,000ηm^3;毛细血管容积约占肾小球容积的60％。从入球小动脉到出球小动脉血流平均经过9次毛细血管结点。本文讨论了诸参数的可信性和意义。

To get the structural parameters of the human renal glomerulus, the morphological and mathemetical methods were used. 10 normal kidneys of adult human were used. The diameter of 300 renal glomeruli was estimated. The number of the surface capillary nodes, the inter ndde distance and the capillarydiameter of 50 glomeruli were measured under scanning electron microscopy and light, microscopy and estimated by formulas developed.The diameter of glomerular in normal human was 159.74±10.21um. On the average, there were about 340 capillary nodes and 620 capilaries in each glomenlus. The total length of capillaries in each glomerulus was about 17300 um, covering an area about 500 000 um^2 with the volume of 1281260000 um^3 according to the calulation.The capillary volume was abdut 60% of a renal glomerulus.The blood flow of the glomerulus, on the-average, goes through 9 capillaries longitudinally from the afferent arterial to the efferent arterial, and the maxium number of capillaries through which the blood passes transversely is about 140. The significance of the findings was discussed.