Application of ultrasonic shift Doppler technique to record velocity changes of intrauretral urine flow

Velocity Changes of intraluminal urine flow were recorded using the ultrasonic shift Doppler principle on exposed ureters of five adult mongrel dogs. This method has been used for further understanding of the speed of urine transport within the ureter when it is affected by ureteral peristalsis and the level of diuresis. Simultaneous recording of urine velocity curves and electroureterograms were performed. The results indicate that there is a direct relationship between intraluminal urine flow and peristaltic contraction. The results also show that the velocity of a urine bolus is highest during olguric conditions (urine flow1 ml/min), and, at polyuric conditions (urine flow 3 ml/min) the flow through the ureter is continuous.