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Related Experiment Videos

Liquid drainage through the peritoneal diaphragmatic surface.

G Miserocchi1, D Negrini, S Mukenge

  • 1Istituto Fisiologia Umana I, Universita Degli Studi, Milano, Italy.

Journal of Applied Physiology (Bethesda, Md. : 1985)
|April 1, 1989
PubMed
Summary

The diaphragm

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Area of Science:

  • Physiology
  • Anatomy

Background:

  • The diaphragm plays a crucial role in respiration.
  • Peritoneal fluid dynamics are not fully understood.

Purpose of the Study:

  • To investigate fluid transport across the diaphragmatic tendinous portion.
  • To determine the influence of diaphragmatic tension on peritoneal fluid drainage.

Main Methods:

  • A fluid-filled capsule was attached to the rabbit diaphragm.
  • Flow (Fcap) and pressures (Pcap, Psup) were measured.
  • Diaphragmatic tension was manipulated by capsule placement (end-inspiration vs. end-expiration).

Main Results:

  • Fluid flow (Fcap) correlated positively with transdiaphragmatic pressure and breathing frequency.
  • Diaphragmatic fluid drainage was 10-fold higher when capsules were applied at end-inspiration compared to end-expiration.
  • Drainage was independent of capsular fluid protein concentration.

Conclusions:

  • The tendinous portion of the diaphragm acts as a peritoneal fluid drainage site.
  • Lymphatic stomata conductance is influenced by diaphragmatic tension.
  • Estimated average peritoneal fluid drainage is 43 microliters/min.

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