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Urine storage mechanisms

C W Vaughan1, P M Satchell

  • 1Gordon Craig Laboratory, Department of Surgery, University of Sydney, Australia.

Progress in Neurobiology
|June 1, 1995
PubMed
Summary
This summary is machine-generated.

The bladder

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Area of Science:

  • Physiology
  • Urology

Background:

  • Urine storage relies on coordinated bladder body and outlet control.
  • Mechanisms of urine storage are not fully understood, impacting clinical significance.
  • Species vary in urine storage duration due to filling rates, with the bladder chamber key to capacity and compliance.

Purpose of the Study:

  • Investigate the mechanisms of urine storage.
  • Clarify the roles of intrinsic smooth muscle and extrinsic neural systems.
  • Address controversies arising from diverse experimental methodologies.

Main Methods:

  • Analysis of bladder function under various physiological conditions.
  • Examination of intrinsic myogenic factors and extrinsic neural drives.
  • Evaluation of how filling regimes and experimental factors influence storage.

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Main Results:

  • Myogenic factors enable bladder storage of increasing volumes at low pressure.
  • Extrinsic neural systems provide a sympatho-inhibitory drive during storage.
  • This drive reduces bladder wall tension sensed by mechanoreceptors, delaying the micturition threshold.

Conclusions:

  • Bladder storage involves both myogenic factors and a regulated sympatho-inhibitory neural drive.
  • The sympatho-inhibitory drive modulates mechanoreceptor activity rather than increasing bladder compliance.
  • Understanding these mechanisms is crucial for addressing urine storage disorders.