Montorsi F, Sarteschi M, Maga T, Guazzoni G, Fabris G F, Rigatti P, Pizzini G, Miani A
Department of Andrology, University of Milan School of Medicine, Italy.
J Urol. 1998 Mar;159(3):808-10.
We investigated the morphological and functional features of cavernous helicine arterioles in male potent subjects.
Ten young men reporting normal rigid erections which were confirmed by polysomnographic recording underwent power Doppler sonography of the cavernous helicine arterioles during flaccidity, after intracavernous injection of alprostadil, and after subsequent genital and audiovisual sexual stimulation.
During flaccidity the helicine arterioles were never detected by power Doppler imaging while they became evident in all cases after alprostadil injection. They usually originated from the cavernous artery forming an acute angle and showed 3 orders of ramifications. Systolic and diastolic flow was present. After genital and audiovisual sexual stimulation, and achievement of maximum rigidity, the helicine arterioles were still evident but with only 1 or 2 orders of distal ramifications. Only systolic flow was present. During penile tumescence the helicine arterioles disappeared in all cases.
Using power Doppler sonography it is possible to investigate the functional anatomy of the cavernous helicine arterioles during the various phases of the erectile cycle. Our preliminary study suggests that the helicine arterioles are functionally inactive during penile flaccidity while they are activated during penile tumescence and continue to supply blood to the corpora also during maximum penile rigidity.
我们研究了具有勃起功能的男性海绵体螺旋小动脉的形态和功能特征。
10名报告有正常坚硬勃起的年轻男性，其勃起情况经多导睡眠图记录证实，在阴茎疲软状态下、海绵体内注射前列地尔后以及随后进行生殖器和视听性刺激后，接受了海绵体螺旋小动脉的能量多普勒超声检查。
在阴茎疲软状态下，能量多普勒成像从未检测到螺旋小动脉，而在注射前列地尔后，所有病例中螺旋小动脉均变得明显。它们通常起源于海绵体动脉，形成锐角，并显示出三级分支。存在收缩期和舒张期血流。在生殖器和视听性刺激以及达到最大硬度后，螺旋小动脉仍然明显，但只有1或2级远端分支。仅存在收缩期血流。在阴茎肿胀期间，所有病例中的螺旋小动脉均消失。
使用能量多普勒超声可以研究勃起周期各阶段海绵体螺旋小动脉的功能解剖结构。我们的初步研究表明，螺旋小动脉在阴茎疲软状态下功能不活跃，而在阴茎肿胀期间被激活，并且在阴茎最大硬度时也继续向海绵体供血。
