Licht M R, Lewis R W, Wollan P C, Harris C D
Department of Urology, Mayo Clinic, Rochester, Minnesota, USA.
J Urol. 1995 Nov;154(5):1740-3.
We evaluated the relative use of RigiScan measurement of radial rigidity compared to sleep laboratory measurement of axial rigidity and trained observer determination of erectile function in the diagnosis of organic impotence.
A total of 28 patients underwent simultaneous 2-night formal sleep laboratory nocturnal penile tumescence and RigiScan monitoring. Standard normal values for radial rigidity and axial rigidity were tested for accuracy in predicting normal nocturnal penile tumescence compared to trained observer determination of the adequacy of an erection for penetration.
RigiScan tip measurements correlated poorly with buckling pressure, while base measurements strongly correlated (p = 0.0005). Observer determination of a functional erection was strongly associated with tip (p = 0.002), base (p = 0.0005) and buckling pressure measurements (p = 0.0005). Using observer determination as the gold standard receiver operating curves were generated to select RigiScan base and buckling pressure measurements that predicted functional erections with the highest sensitivity and specificity.
RigiScan is a useful tool for measuring nocturnal penile tumescence. However, base measurements are more accurate than tip measurements for evaluating erectile function. The currently accepted level of rigidity used to define a normal erection (70% or greater) overestimates organic erectile dysfunction.
我们评估了与睡眠实验室测量轴向硬度以及训练有素的观察者判定勃起功能相比，使用RigiScan测量阴茎根部硬度在器质性阳痿诊断中的相对应用情况。
共有28例患者同时接受了为期两晚的正规睡眠实验室夜间阴茎勃起监测和RigiScan监测。将阴茎根部硬度和轴向硬度的标准正常值与训练有素的观察者判定勃起是否足以进行性交的结果进行比较，以检验其在预测正常夜间阴茎勃起方面的准确性。
RigiScan尖端测量值与弯曲压力的相关性较差，而基部测量值相关性较强（p = 0.0005）。观察者判定功能性勃起与尖端测量值（p = 0.002）、基部测量值（p = 0.0005）和弯曲压力测量值（p = 0.0005）密切相关。以观察者判定为金标准生成接受者操作曲线，以选择预测功能性勃起具有最高敏感性和特异性的RigiScan基部测量值和弯曲压力测量值。
RigiScan是测量夜间阴茎勃起的有用工具。然而，对于评估勃起功能，基部测量比尖端测量更准确。目前公认的用于定义正常勃起的硬度水平（70%或更高）高估了器质性勃起功能障碍。
