Beckett S D, Reynolds T M, Bartels J E
Am J Vet Res. 1978 Dec;39(12):1950-4.
Serial angiography was used to determine blood flow patterns to the penis of rams and bucks. Animals were anesthetized and the internal pudendal artery was catheterized so that contrast medium could be injected toward the crus penis area. By comparing vascular patterns of the ram and buck during erection, it was found that flow patterns of the corpus cavernosum penis (CCP) and corpus spongiosum penis (CSP) were similar for both species. Contraction of the ischiocavernosus muscles occluded the arterial inflow and venous outflow to the CCP, making it a closed system during peak erection. However, during erection, the contrast medium continued to flow into the CSP, showing that it is not a closed system. In the vasodilatation phase, the CSP usually filled before and more intensely than did the CCP.
采用连续血管造影术来确定公羊和雄鹿阴茎的血流模式。动物被麻醉，阴部内动脉被插入导管，以便向阴茎脚区域注入造影剂。通过比较勃起过程中公羊和雄鹿的血管模式，发现两种动物阴茎海绵体（CCP）和尿道海绵体（CSP）的血流模式相似。坐骨海绵体肌的收缩阻塞了CCP的动脉流入和静脉流出，使其在勃起高峰期成为一个封闭系统。然而，在勃起过程中，造影剂继续流入CSP，表明它不是一个封闭系统。在血管舒张期，CSP通常比CCP更早且更强烈地充盈。
