Djurhuus J C, Constantinou C E
Invest Urol. 1979 Sep;17(2):103-7.
The response of the healthy pyeloureteral system of the pig to stepwise increments of urine flow was measured using a flow-velocity, diameter probe. The following urodynamic parameters were measured: renal pelvic pressure, ureteral flow-velocity and diameter, and associated bolus volume in the range of urine flow rates of 0.3 to 10 ml per min. The results show that the diameter sensoring portion of this probe can reliably sense ureteral peristalsis over the entire range of urine flow rates; small alterations in ureteral diameter occurring in dilated ureters after high diuretic loads can also be detected. Data obtained using the flow-velocity portion of this probe indicate that at urine flow rates less than 0.5 ml per min flow-velocity changes of a bolus can be reliably identified. At these flow rates the maximum flow-velocity occurs at the leading edge of the bolus and is invariant with the size of the bolus. At urine flow rates more than 1 ml per min the flow-velocity curve is polyphasic, indicative of an alteration in the mechanism of urine transport by the ureter at these flows. Collectively, data obtained using this probe provide dynamic information concerning the physiologic properties of the upper urinary tract not currently attainable in existing pressure/flow methodologies.
使用流速 - 直径探头测量猪健康肾盂输尿管系统对尿量逐步增加的反应。测量了以下尿动力学参数：肾盂压力、输尿管流速和直径，以及在每分钟0.3至10毫升尿量范围内的相关团块体积。结果表明，该探头的直径传感部分能够在整个尿量流速范围内可靠地感知输尿管蠕动；高利尿负荷后扩张输尿管中发生的输尿管直径的微小变化也能被检测到。使用该探头流速部分获得的数据表明，在尿量流速低于每分钟0.5毫升时，能够可靠地识别团块的流速变化。在这些流速下，最大流速出现在团块的前缘，并且与团块大小无关。在尿量流速超过每分钟1毫升时，流速曲线呈多相性，表明在这些流速下输尿管尿液输送机制发生了改变。总体而言，使用该探头获得的数据提供了有关上尿路生理特性的动态信息，这是现有压力/流量方法目前无法获得的。
