Broderick G A, McGahan J P, Stone A R, White R D
Department of Urology, University of California School of Medicine, Davis.
J Urol. 1992 Jan;147(1):57-61. doi: 10.1016/s0022-5347(17)37132-x.
Duplex ultrasound with pulsed Doppler and color flow sonography were used to image the penis and conduct blood flow velocity studies in 5 patients. Cavernous body cross sectional area, cavernous artery diameters and peak systolic velocities were measured in the flaccid shaft, after transient exposure to negative pressure in a vacuum constriction device, and with a vacuum constriction device band applied to the tumescent shaft. We found that exposure to vacuum transiently increased central cavernous arterial blood flow velocities compared to baseline values in all patients. After a trial of a vacuum constriction device and application of the constricting band cavernous body cross sectional areas doubled. Despite increased cavernous arterial diameters in 4 of 5 patients and increased blood flow in all patients after vacuum-induced tumescence alone, we could not visualize arterial inflow in the penile shaft once the constricting band was in place. Color Doppler ultrasound can detect cavernous artery systolic flow as low as 2 to 9 cm. per second. Our data suggest that the erectile state maintained distal to the vacuum constriction device band is low flow and relatively ischemic.
使用带有脉冲多普勒和彩色血流超声的双功超声对5例患者的阴茎进行成像并进行血流速度研究。在疲软阴茎体部、短暂暴露于真空缩窄装置中的负压后以及在勃起阴茎体部应用真空缩窄装置束带时，测量海绵体横截面积、海绵体动脉直径和收缩期峰值流速。我们发现，与所有患者的基线值相比，暴露于真空会使海绵体中央动脉血流速度暂时增加。在试用真空缩窄装置并应用缩窄束带后，海绵体横截面积增加了一倍。尽管5例患者中有4例海绵体动脉直径增加，且仅在真空诱导勃起后所有患者的血流均增加，但一旦放置缩窄束带，我们就无法在阴茎体部观察到动脉血流。彩色多普勒超声可检测低至每秒2至9厘米的海绵体动脉收缩期血流。我们的数据表明，在真空缩窄装置束带远端维持的勃起状态是低流量且相对缺血的。
