The impact of delaying enteral feeding on gastric emptying, plasma cholecystokinin, and peptide YY concentrations in critically ill patients

Critical Care Medicine
Nam Q NguyenMichael Horowitz

Abstract

Enteral nutrient (EN) deprivation slows gastric emptying (GE) and increases plasma cholecystokinin (CCK) concentrations in healthy humans and may potentially contribute to the delayed GE in the critically ill. This study examined the impact of delayed feeding on GE, plasma CCK, and peptide YY (PYY) concentrations in the critically ill. Randomized controlled trial. Mixed medical and surgical intensive care unit (ICU). Twenty-eight critically ill patients were randomized to receive EN either within 24 hrs of admission ("early feeding": 54.9 +/- 3.3 yrs; Acute Physiology and Chronic Health Evaluation (APACHE) II = 23.0 +/- 1.8) or on day 4 of admission after GE assessment ("delayed feeding": 56.1 +/- 4.2 yrs, APACHE II = 21.7 +/- 1.8). GE of 100 ml of Ensure was measured using scintigraphy on day 4 of admission. Blood was sampled for measurement of plasma CCK, PYY, and glucose concentrations. Demographics, APACHE II score, use of inotrope and morphine sedation were similar between the groups. The mean administered/prescribed caloric ratio in the "early feeding" group was 72 +/- 4%. There were no differences in the retention of meal, intragastric meal distribution, proportion of patients with delayed GE (9/14 vs. 9/14), and plasma ...Continue Reading

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