Regnier C H, Susset J G, Ghoniem G M, Biancani P
J Urol. 1983 May;129(5):1060-2.
We describe a new probe made of several F5 Vinyl tubes glued and staggered together in such a way that the catheter progressively increases in size (from F5 to F30), as more tubes are joined. At each size, pressure is recorded through a single side hole in one of the tubes. Pressure within the urethra is thus successively recorded from F5 to F30 as the catheter is further introduced. A single pressure transducer is used since the lines of the probe are separately and successively connected to the transducer through a 6-channel manifold, as one proceeds to the next diameter. Pressure diameter curves are obtained and reported on a graph. The data are analyzed by fitting the graphs with a one exponential equation P = PoeaD; 2 parameters are computed: Po, the initial pressure when the urethra is catheter free, and a, the rate of exponential increase in pressure as higher diameters are introduced to measure urethral wall stiffness. This catheter was used to measure the maximum urethral pressure in 10 young nulliparous volunteers, at each level of stretch. The values of Po and a were found to be respectively 74.4 +/- 7.7 cm. H2O and 0.08 +/- 0.02. The quantitative measurement of urethral compliance constitutes for us an integral part in the urodynamics assessment of female patients presenting with lower urinary tract dysfunction.
我们描述了一种新的探头，它由几根F5乙烯管粘合在一起并交错排列而成，这样随着连接的管子增多，导管的尺寸逐渐增大（从F5到F30）。在每个尺寸下，通过其中一根管子上的单个侧孔记录压力。当进一步插入导管时，尿道内的压力因此从F5到F30依次记录。由于探头的线路通过一个6通道歧管分别并依次连接到传感器，所以使用单个压力传感器，随着直径的增大依次进行测量。获得压力-直径曲线并绘制在图表上。通过用单指数方程P = PoeaD拟合图表来分析数据；计算两个参数：Po，即尿道无导管时的初始压力，以及a，即随着引入更大直径来测量尿道壁硬度时压力的指数增加率。使用这种导管在10名年轻未生育志愿者的每个拉伸水平下测量最大尿道压力。发现Po和a的值分别为74.4 +/- 7.7 cmH2O和0.08 +/- 0.02。尿道顺应性的定量测量对我们来说是对患有下尿路功能障碍的女性患者进行尿动力学评估的一个组成部分。
