Albright R J, Peterson J R
Am J Physiol. 1977 May;232(5):F471-5. doi: 10.1152/ajprenal.1977.232.5.F471.
An application of a signal-processing system to the urethra is described which allows for real-time measurement of the average velocity of the urine at a particular location along the urethra during voiding through measurement of the average frequency in ultrasonic return from scatterers in the flowing urine. In addition, this comparatively simple system provides, without additional instrumentation, the relative urethral cross-sectional area at this location and the relative urine flow rate as functions of time throughout the voiding period. Tests indicate its potential as a valuable transcutaneous diagnostic aid in the detection, study, and treatment of various disorders and diseases of the lower urinary system. The key element of the system is a circuit having a voltage transfer function magnitude proportional to the square root frequency.
描述了一种将信号处理系统应用于尿道的方法，该方法通过测量流动尿液中散射体的超声回波平均频率，来实时测量排尿过程中尿道特定位置处尿液的平均流速。此外，这个相对简单的系统无需额外仪器，就能提供该位置的相对尿道横截面积以及整个排尿期内作为时间函数的相对尿流率。测试表明，它在检测、研究和治疗下尿路各种病症方面，有作为一种有价值的经皮诊断辅助手段的潜力。该系统的关键元件是一个电压传递函数幅度与频率平方根成正比的电路。
