Abstract
Objective
Protein sparing, the major goal of nutritional support, may be affected by the glucose/lipid ratio. This study in critically ill patients compared the efficacy and tolerance of two isocaloric isonitrogenous total parenteral nutritions (TPN) having different glucose/lipid ratios.
Design
Multicentric prospective randomized study.
Patients
47 patients with SAPS I score higher than 8 and requiring exclusive TPN.
Interventions
Patients received glucose/lipid ratios of 50/50 or 80/20. For 7 days all patients received 32 glucidolipidic kcal/kg and 0.27 g/kg nitrogen daily. All-in-one bags were prepared using industrial mixtures and a fat emulsion.
Measurements and results
We determined TPN efficacy by nitrogen balance, urinary 3-methylhistidine/creatinine ratio, transthyretin and tolerance by glycemia, and liver enzymes. After controlling for five variables with significant effects, patients receiving the 50/50 ratio during TPN had significantly higher nitrogen balance than those receiving the 80/20 ratio. The daily difference in mean nitrogen sparing effect in favor of the latter group was 1.367 g (95% CI 0.0686–2.048). Glycemia on day 4 and γ-glutamyltranspeptidase on day 8 were higher in group receiving the the 80/20 ratio.
Conclusions
In critically ill patients TPN at a glucose/lipid ratio of 80/20 ratio induces a small nitrogen sparing effect compared to the ratio of 50/50, at the expense of poorer glycemic control. The clinical significance is unclear.
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This research was supported by a grant from Fresenius Laboratories
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Boulétreau, P., Chassard, D., Allaouchiche, B. et al. Glucose-lipid ratio is a determinant of nitrogen balance during total parenteral nutrition in critically ill patients: a prospective, randomized, multicenter blind trial with an intention-to-treat analysis. Intensive Care Med 31, 1394–1400 (2005). https://doi.org/10.1007/s00134-005-2771-5
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DOI: https://doi.org/10.1007/s00134-005-2771-5