Hashimoto T, Irisawa C, Yoshimura Y, Yamaguchi O, Shiraiwa Y
Department of Urology, Fukushima Medical College.
Hinyokika Kiyo. 1992 May;38(5):531-4.
Although many urodynamic techniques have been used to evaluate the function of the lower urinary tract, the principles of these measurements are only based on a relationship between flow rate and pressure. In addition to these measurements, the intravesical urine stream would provide useful information on urodynamics. We have experimentally attempted to visualize the urine stream in a bladder using transrectal ultrasound examination. Since an air-particle is a good target for ultrasound visualization, we instillated a 10% glycerine solution into the bladder for the maintenance of air-particles. Before instillation, this glycerine solution was strongly shaken so that air-particles were kept in the solution. The urine stream was successfully observed throughout the whole process of voiding. In video-recording analysis, the velocity of urine stream was measured by tracing some air-particles. The velocity of urine stream was approximately 28.4 cm/sec in the body and increased to 116.6 cm/sec at the bladder neck. Thus, the urine stream was accelerated toward the urethra during voiding. Therefore, it seems that visualization of the urine stream offers a new parameter for evaluation of urodynamic studies.
尽管许多尿动力学技术已被用于评估下尿路功能，但这些测量原理仅基于流速与压力之间的关系。除了这些测量之外，膀胱内尿流将为尿动力学提供有用信息。我们已通过经直肠超声检查对膀胱内的尿流进行实验性可视化。由于空气颗粒是超声可视化的良好目标，我们向膀胱内注入10%的甘油溶液以维持空气颗粒。注入前，将该甘油溶液剧烈摇晃以使空气颗粒保持在溶液中。在排尿的整个过程中成功观察到了尿流。在视频记录分析中，通过追踪一些空气颗粒来测量尿流速度。尿流速度在体内约为28.4厘米/秒，在膀胱颈处增至116.6厘米/秒。因此，排尿期间尿流向尿道加速。所以，尿流可视化似乎为尿动力学研究评估提供了一个新参数。
