THE TRANSPORT OF RADIOPAQUE MEDIUM THROUGH THE INITIAL SEGMENT OF THE RAT EPIDIDYMIS
THE TRANSPORT OF RADIOPAQUE MEDIUM THROUGH THE INITIAL SEGMENT OF THE RAT EPIDIDYMIS
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不透射线介质通过大鼠附睾初始段的运输
DOI：
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发表时间：
1960
期刊：
影响因子：
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通讯作者：
J. Aukland
中科院分区：
文献类型：
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作者：
E. Macmillan;J. Aukland
（）在随机选择的成熟雄性大鼠的手术中，将50%Micropaque悬浮液（Damancy & Co Ltd）通过睾丸网引入右侧和左侧的输精管。在右侧，介质的流动被推进，直到看到一个量进入初始段。然后在结扎之间横切终末输出小管，并从近端导管系统的远端残余物中分离出起始段。在左侧，培养基的流动没有前进到末端输出小管之外。(2)在手术后4小时至15天内处死的43只动物中，有34只动物的手术侧和对照侧的血流速度几乎相同。(3)将大鼠附睾起始段与输出血管和睾丸分离并不能阻止其内容物向头曲的运动。然后，培养基通过附睾管运输，其流速与与与传出系统和睾丸仍然存在自由连通时的流速没有显著差异。(4)通过初始节段的运输基本上（如果不是完全的话）取决于肌肉的收缩。(5)所记录的结果是对以前调查结果的补充。在50%Micropaque混悬液的运输过程中，睾丸、输出血管和起始段的推进力在力学上是相互独立的。(6)这表明，大鼠睾丸流出道系统各部分之间存在的精子密度的变化并不一定反映睾丸产物运输速率的变化;它们很可能与整个睾丸发生的复杂的液体交换有关。
( ) At operation in a random selection of mature male rats, 50 % Micropaque suspension (Damancy & Co Ltd) was introduced through the rete testis into the vasa efferentia both on the right and left sides. On the right side, the flow of the medium was advanced until a quantity was seen to enter the initial segment. The terminal efferential tubule was then transected between ligatures and the initial segment isolated from the distal remnant of the proximal duct system. On the left side, the flow of the medium was not advanced beyond the terminal efferential tubule. (2) In thirty-four out of forty-three animals sacrificed at periods varying from 4 hr to 15 days after operation, the rates of flow as between the operated and the control sides were practically identical. (3) Isolation of the initial segment of the rat epididymis from the vasa efferentia and from the testis does not prevent the movement of its contents towards the caput flexure. The medium is then transported through the ductus epididymidis at a rate of flow not significantly different from that which obtains when free communication with the efferential system and with the testis still exists. (4) Transport through the initial segment depends essentially if not entirely on muscular peristalsis. (5) The results recorded are additional to previous findings. The propulsive forces existent in the testis, the vasa efferentia and the initial segment during the transport of 50 % Micropaque suspension are mechanically independent of one another. (6) It is suggested that the variations in sperm density which exist as between portions of the excurrent duct system of the rat testis do not necessarily reflect altera¬ tions in the rates of transport of testicular products ; they may well be associated with the complicated fluid exchanges which occur throughout.