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Nutritional changes in nonhuman primates during mechanical ventilation.

G R Polk1, S G Jenkinson, W G Johanson

  • 1Department of Medicine, University of Texas Health Science Center, San Antonio.

The American Journal of Clinical Nutrition
|December 1, 1987
PubMed
Summary
This summary is machine-generated.

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Healthy baboons with acute lung injury showed early decreases in serum albumin levels. This suggests albumin may pool in the lungs after oleic acid-induced lung injury during mechanical ventilation.

Area of Science:

  • Veterinary Medicine
  • Pulmonary Medicine
  • Nutritional Science

Background:

  • Acute lung injury (ALI) models are crucial for understanding respiratory diseases.
  • Nutritional status significantly impacts recovery from critical illness.
  • Baboons serve as valuable models for human respiratory physiology.

Purpose of the Study:

  • To investigate early nutritional changes in baboons with oleic acid-induced ALI.
  • To assess the impact of mechanical ventilation on protein and lipid metabolism.

Main Methods:

  • Prospective evaluation of eight adult baboons with induced ALI.
  • Inclusion of mechanical ventilation for 8 days with hypocaloric feeding.
  • Serial measurements of muscle mass, visceral protein, and plasma lipids.

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Main Results:

  • Serum protein and albumin concentrations decreased for 3 days post-ventilation initiation, then stabilized.
  • Bronchoalveolar lavage fluid (BALF) protein concentrations significantly increased post-oleic acid administration.
  • Hypocaloric feeding with dextrose infusion led to marked serum albumin reduction.

Conclusions:

  • Baboons with ALI experience rapid declines in serum albumin during mechanical ventilation.
  • Albumin decrease may be attributed to extravascular sequestration within the injured lung.
  • Early nutritional support strategies need consideration in ALI management.