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Parenteral Structured Triglyceride Emulsion Improves Nitrogen Balance and Is Cleared Faster from the Blood in Moderately Catabolic Patients

Department of Gastroenterology, University Medical Center Nijmegen, Nijmegen, The Netherlands

Ton H. Naber, MD, PhD

Department of Gastroenterology, University Medical Center Nijmegen, Nijmegen, The Netherlands, T.Naber{at}gastro.azn.nl

J. Adam van der Vliet, MD, PhD

Department of Surgery, University Medical Center Nijmegen, Nijmegen, The Netherlands

Claes Carneheim, PhD

Fresenius-Kabi, Stockholm, Sweden

Martijn B. Katan, PhD

Department of Gastroenterology, University Medical Center Nijmegen, Nijmegen, The Netherlands

Jan B. Jansen, MD, PhD

Department of Gastroenterology, University Medical Center Nijmegen, Nijmegen, The Netherlands

Background: Most postoperative patients lose net protein mass, which reflects loss of muscle tissue and organ function. Perioperative parenteral nutrition may reduce the loss of protein, but in general, with conventional lipid emulsions a waste of protein still remains. Methods: We compared the effects on nitrogen balance of an emulsion containing structured triglycerides, a new type of synthesized triglycerides, with an emulsion of a physical mixture of medium- and long-chain triglycerides as part of parenteral feeding in moderately catabolic patients. The first 5 days after placement of an aortic prosthesis patients received total parenteral nutrition (TPN) providing 0.2 g of nitrogen per kg body weight per day; energy requirement was calculated using Harris and Benedict's equation, adding 300 kcal per day for activity. Twelve patients were treated with the structured triglyceride emulsion and 13 patients with the emulsion of the physical mixture of medium- and long-chain triglycerides. The design was a randomized, double-blind parallel study. Results: In the patients who completed the study, the mean cumulative nitrogen balance over the first 5 postoperative days was -8 ± 2 g in 10 patients on the structured triglyceride emulsion and -21 ± 4 g in 9 patients on the emulsion of the physical mixture of medium- and long-chain triglycerides; the mean difference was 13 g of nitrogen (95% confidence interval 4 to 22, p = .015) in favor of the structured triglyceride emulsion. On the first postoperative day serum triglyceride and plasma medium-chain free fatty acid levels increased less during infusion of the structured triglyceride emulsion than with the physical mixture emulsion. Conclusions: The parenteral structured triglyceride emulsion improves the nitrogen balance and is cleared faster from the blood, compared with the emulsion of the physical mixture of medium- and long-chain triglycerides, in moderately catabolic patients. (Journal of Parenteral and Enteral Nutrition 25:237-244, 2001)

Journal of Parenteral and Enteral Nutrition, Vol. 25, No. 5, 237-244 (2001)
DOI: 10.1177/0148607101025005237


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