Journal
CURRENT OPINION IN CLINICAL NUTRITION AND METABOLIC CARE
Volume 20, Issue 2, Pages 131-137Publisher
LIPPINCOTT WILLIAMS & WILKINS
DOI: 10.1097/MCO.0000000000000348
Keywords
diet; enteral nutrition; intestinal microbiome; parenteral nutrition; probiotics
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Funding
- National Institutes of Health [R21HD087802]
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Purpose of reviewThis review describes the relationship between nutritional therapies and the intestinal microbiome of critically ill patients.Recent findingsThe intestinal microbiome of the critically ill displays a near complete loss of health-promoting microbiota with overgrowth of virulent healthcare-associated pathogens. Early enteral nutrition within 24h of admission to the ICU has been advocated in medical and surgical patients to avoid derangements of the intestinal epithelium and the microbiome associated with starvation. Contrary to previous dogma, permissive enteral underfeeding has recently been shown to have similar outcomes to full feeding in the critically ill, whereas overfeeding has been shown to be deleterious in those patients who are not malnourished at baseline. Randomized clinical trials suggest that peripheral nutrition can be used safely either as the sole or supplemental source of nutrition even during the early phases of critical care. The use of probiotics has been associated with a significant reduction in infectious complications in the critically ill without a notable mortality benefit.SummaryFocus of research is shifting toward strategies that augment the intestinal environment to facilitate growth of beneficial microorganisms, strengthen colonization resistance, and maintain immune homeostasis.
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