射精の研究 : 第9報 精管内における精子の移送のメカニズムについて
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In this paper an attempt was made to elucidate the mechanism of the transportation of spermatozoa in the vas deferens in male mongrel dogs. Methods: Intraluminal pressure of the vas deferens was measured in vivo by inserting one or two polyethylene tubes to the lumen of the vas deferens and the number of the spermatozoa transported to the end of the vas deferens or to the posterior urethra was measured. The autonomic drugs were administered intra-aortically. Results are as follows: 1. Autonomic contraction of the vas deferens. Measurement of the intraluminal pressure clarified that the vas deferens repeated autonomic contraction. This contraction was not so-called peristalsis but the entire portion of the vas deferens contracted simultaneously. When autonomic contraction was repeating, the posterior urethra was washed with physiologic saline every 15 minutes. One or two spermatozoa were present in every 400x field of the sediment of the saline. Then, the lumen of the vas deferens was irrigated with 2.5% and 10% formalin for 10 minutes to inhibit the cilial movement of the epithelium and the movement of the spermatozoa. Even after the irrigation the spermatozoa were present in the posterior urethra. These results indicate that the spermatozoa in the cauda epididymidis and the proximal portion of the vas deferens are continously transported by the autonomic contraction and that transportation of spermatozoa is not confined to ejaculation.
- 社団法人日本泌尿器科学会の論文
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