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Related Experiment Videos

[Visualization of the intravesical urine stream].

T Hashimoto1, C Irisawa, Y Yoshimura

  • 1Department of Urology, Fukushima Medical College.

Hinyokika Kiyo. Acta Urologica Japonica
|May 1, 1992
PubMed
Summary

This study visualizes urine flow within the bladder using transrectal ultrasound and glycerine solution. This novel method successfully measured urine stream velocity, offering a new parameter for urodynamic evaluation.

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Area of Science:

  • Urology
  • Medical Imaging
  • Fluid Dynamics

Background:

  • Current urodynamic studies primarily rely on flow rate and pressure.
  • Visualizing the intravesical urine stream could offer valuable insights into lower urinary tract function.

Purpose of the Study:

  • To experimentally visualize the urine stream within the bladder using transrectal ultrasound.
  • To establish a new method for evaluating urodynamics by analyzing urine stream characteristics.

Main Methods:

  • Instillation of a 10% glycerine solution containing air-particles into the bladder.
  • Utilization of transrectal ultrasound to visualize the urine stream during voiding.
  • Analysis of video recordings to measure urine stream velocity by tracking air-particles.

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Main Results:

  • Successful visualization of the urine stream throughout the entire voiding process.
  • Measured urine stream velocity of approximately 28.4 cm/sec in the bladder.
  • Observed acceleration of the urine stream to 116.6 cm/sec at the bladder neck.

Conclusions:

  • Visualization of the intravesical urine stream is feasible using transrectal ultrasound.
  • The measured urine stream velocity and acceleration provide a new potential parameter for urodynamic assessment.
  • This technique may enhance the understanding and evaluation of lower urinary tract function.