APPLICATION OF ULTRASONIC SHIFT DOPPLER TECHNIQUE TO STUDY THE DYNAMICS OF LOWER URINARY TRACT
1976 Volume 67 Issue 5 Pages 326-332
Details
1976 Volume 67 Issue 5 Pages 326-332
Feasibility of ultrasonic Doppler shift technique to study the dynamics of lower urinary tract is demonstrated. Model experiment was performed to examine an error, lag time and response time of urine velocity curves recorded by this technique with the use of frequencymeter. In addition, some clinical experience were reported. The results are as follows.
1) Measured values of urine velocity were 9 to 13% higher than mean velocity.
2) Both lag time and response time were generally the same as those by magnetic flow meter recording.
3) Values of urine velocity at the transducer location along male urethra during voiding were about 195cm/sec, 150cm/sec and 130cm/sec at the plans, pendulum and perineum respectively.
4) There was a significant correlation between exit velocity and velocity of intraurethral urine flow at the plans.
5) Elevation of intravesical pressure and initiation of voiding were simultaneously observed on a patient with stress incontinence.
