Glomerular vessels of the rat kidney with special reference to double efferent arterioles. A scanning electron microscope study of corrosion casts.
Glomerular vessels of the rat kidney with special reference to double efferent arterioles. A scanning electron microscope study of corrosion casts.
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大鼠肾脏的肾小球血管，特别是双传出小动脉。
DOI：
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发表时间：
1971
期刊：
影响因子：
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通讯作者：
T. Fujita
中科院分区：
文献类型：
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作者：
T. Murakami;M. Miyoshi;T. Fujita
采用甲基丙烯酸甲酯树脂制备大鼠肾脏血管床腐蚀模型。分离单个肾小球管型，涂上碳和金，在扫描电镜下观察。 1．在检查的 1, 200 个肾小球中，有 11 个遇到了与肾小球分开产生的真正的双传出小动脉。它们是由不同肾小球小叶的毛细血管分别形成的独立血管。 2．在 1, 200 个肾小球中的 55 个中，单独从肾小球发出的正常传出小动脉在肾小球门处表现出早熟分支。在以前的光学显微镜研究中，这种类型的血管可能被错误地描述为两个传出小动脉。3．狭窄经常出现在传入小动脉的肾小球旁段，很少出现在传出小动脉中。这表明在这些部位出现了括约肌。4．对幼年大鼠的肾小球管型进行了初步描述。 8日龄大鼠偶见传出小动脉重复。5．对酒精软化的孤立肾小球管型进行显微解剖，可以观察肾小球小叶及其毛细血管连接。为此，建议使用不含增塑剂的树脂。
Corrosion casts of the blood vascular beds of the rat kidney were prepared with methacrylic methyl ester resin. The casts of the individual glomeruli were isolated and coated with carbon and gold to be observed under the scanning electron microscope.1. True double efferent arterioles arising separately from the glomerulus were encountered in 11 out of the 1, 200 glomeruli examined. They were independent vessels formed separately by the capillaries of different glomerular lobules.2. In 55 out of the 1, 200 glomeruli, the normal efferent arteriole arising singly from the glomerulus showed precocious branching at the hilum of the glomerulus. This type of vessel perhaps was described erroneously as two efferent arterioles in previous light microscope studies.3. Constrictions were often found in the juxtaglomerular segment of the afferent arteriole and rarely in the efferent arteriole. This suggests the occurrence of a sphincter at these sites.4. A preliminary description of the glomerular casts in juvenile rats was made. Occasional duplication of efferent arterioles was found in 8-day-old rats.5. Microdissection of the isolated glomerular casts softened by alcohol enabled the observation of glomerular lobules and their capillary connections. For this purpose the use of resin not containing plasticizer was recommended.