Nutrition in clinical practice : official publication of the American Society for Parenteral and Enteral Nutrition
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Historical Article
Effect of glutamine-supplemented parenteral nutrition on mortality in critically ill patients.
Glutamine is recognized as a critical amino acid involved in immunity, intestinal health, and nitrogen transport between organs. Prior to the pivotal study by Griffiths and colleagues in 1997, no clinical trials had demonstrated a positive effect from glutamine supplementation on improving long-term survival in critically ill intensive care unit patients receiving parenteral nutrition. Subsequent investigations have confirmed these findings, but further data are needed to determine the optimal dose and timing of glutamine as well as the form of glutamine (ie, free vs dipeptide) that produces the most significant improvement in outcome parameters.
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Traditionally, enteral nutrition (EN) goal rates have been calculated based on an intended continuous 24-hour infusion rate. Many factors in the care of critically ill patients result in interruption of EN infusions, often for several hours daily, which may lead to significant underfeeding. The objective of this study was to evaluate the difference of daily EN volume deficits between a traditionally calculated infusion rate and a compensatory, higher calculated infusion rate in which the 24-hour volume was delivered over a 20-hour infusion period. ⋯ Calculating and prescribing higher EN infusion rates, assuming 20 hours of actual infusion daily, promoted delivery of optimal nutrient provisions and avoidance of unintended malnutrition by significantly reducing caloric deficit from frequent EN holding.
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Inadvertent rapid infusion of parenteral lipid emulsion is an inherent risk when fats are infused separately from the dextrose-amino acid solution. Patients may experience hypertriglyceridemia that resolves upon discontinuation of the infusion; in other cases, complications such as fat overload syndrome can occur. Since 2004, fish oil-based emulsions have been used investigationally for the treatment of parenteral nutrition-associated liver disease. Anecdotal reports suggest that patients who receive rapid infusions of this emulsion do not develop symptoms consistent with fat overload syndrome. The aim of this investigation was to determine whether infants receiving a rapid infusion of a fish oil lipid emulsion exhibited symptoms consistent with fat overload syndrome. ⋯ Rapid infusion of a fish oil-based emulsion in 6 infants were well tolerated. No patients developed signs or symptoms of fat overload syndrome.
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Intestinal failure is a complex disease state for which extensive therapy is often required. Parenteral nutrition is one of these therapies, but with its long-term use, life-threatening complications may develop. ⋯ For patients who develop complications from parenteral nutrition and fail intestinal rehabilitation interventions, intestinal transplantation may be the best option. In this review, therapies available for intestinal failure and the use of a multidisciplinary approach to the patient with intestinal failure will be reviewed.
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Parenteral nutrition-associated liver disease (PNALD) is a potentially fatal complication for children with intestinal failure. Fish oil-based lipid emulsions have shown promise for the treatment of PNALD but are not readily available. Six cases are presented in which cholestasis resolved after soybean lipid emulsion (SLE) was removed from parenteral nutrition (PN) and enteral fish oil was given. ⋯ Temporary elimination of SLE and supplementation with enteral fish oil improved cholestasis in PN-dependent infants. Further trials are needed to evaluate this management strategy.