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Triglyceride absorption in transperitoneal alimentation.

E S Adkins1, F T Salman, E W Fonkalsrud

  • 1Division of Pediatric Surgery, UCLA School of Medicine 90024.

American Journal of Surgery
|February 1, 1990
PubMed
Summary
This summary is machine-generated.

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Triglyceride absorption primarily occurs via the visceral peritoneum into lymphatic vessels, not the portal vein. Intestinal resection significantly slows this absorption process in rabbits.

Area of Science:

  • Gastroenterology
  • Physiology
  • Nutrition Science

Background:

  • Intralipid (a lipid emulsion) is used for parenteral nutrition.
  • The primary route of triglyceride absorption following administration into the peritoneal cavity is not fully elucidated.
  • Understanding absorption pathways is crucial for optimizing nutritional support.

Purpose of the Study:

  • To investigate the absorption pathway and rate of triglycerides administered into the peritoneal cavity.
  • To compare triglyceride absorption in rabbits with intact intestines versus those with intestinal resection.

Main Methods:

  • Administration of a 20% Intralipid solution into the peritoneal cavity of fasted rabbits.
  • Serial sampling of serum and peritoneal fluid to measure triglyceride levels.

Related Experiment Videos

  • Comparison between rabbits with intact viscera and those with 50% intestinal resection.

    • Main Results:

    • Half of the administered triglyceride was absorbed within 1 hour in rabbits with intact viscera, compared to 2 hours in those with intestinal resection.
    • A consistently positive caval-arterial gradient for triglycerides was observed in intact intestine rabbits, indicating systemic absorption.
    • The portal-arterial gradient was not significantly different from zero, suggesting minimal portal venous absorption.

    Conclusions:

    • Triglyceride absorption from the peritoneal cavity predominantly occurs across the visceral peritoneum into the lymphatic system.
    • Transperitoneal absorption provides substantial nutritional supplementation in rabbits with intact intestines.
    • Intestinal resection impairs the rate of transperitoneal triglyceride absorption.