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Related Experiment Videos

Blood flow does not limit peritoneal transport.

M F Flessner1, J Lofthouse

  • 1Department of Medicine, University of Rochester Medical Center, New York 14642, USA.

Peritoneal Dialysis International : Journal of the International Society for Peritoneal Dialysis
|July 16, 1999
PubMed
Summary

Reduced blood flow does not significantly impact solute or water exchange in the peritoneum, suggesting peritoneal dialysis is suitable for critically ill patients in shock and renal failure.

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The role of extracellular matrix in transperitoneal transport of water and solutes.

Peritoneal dialysis international : journal of the International Society for Peritoneal Dialysis·2002

Area of Science:

  • Physiology
  • Renal Medicine
  • Critical Care

Background:

  • Peritoneal dialysis (PD) is a life-sustaining treatment for renal failure.
  • The role of peritoneal microvascular blood flow in solute and water exchange during PD is not fully understood.
  • Assessing the impact of reduced blood flow is crucial for PD efficacy in critically ill patients.

Purpose of the Study:

  • To investigate whether reduced peritoneal microvascular blood flow limits solute and water exchange.
  • To determine the impact of significant blood flow reduction on peritoneal transport.

Main Methods:

  • Anesthetized rats underwent surgical placement of chambers on peritoneal tissues (liver, cecum, stomach, abdominal wall).
  • Labeled solutes and hypertonic solutions were introduced into chambers to measure transfer rates.

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  • Laser Doppler flowmetry monitored local blood flow during control, reduced flow (50%-70%), and postmortem conditions.

    • Main Results:

    • Urea transfer was unaffected by a 70% blood flow reduction in most tissues but decreased significantly at zero blood flow.
    • Osmotic water flow showed minimal, insignificant decreases with reduced blood flow.
    • The liver exhibited transport limitations with a 70% blood flow reduction.

    Conclusions:

    • Significant reductions in peritoneal blood flow do not impede overall solute or water transfer across the peritoneum.
    • Acute peritoneal dialysis is a viable option for intensive care unit patients experiencing shock and renal failure.