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Sixty-one patients with liver disorders receiving total parenteral nutrition (TPN) for about 14 postoperative days were divided into three groups based on the parenteral nutritional regimen. The influence of these TPN solutions on the liver function tests and the nutritional assessments, and the availability of the specially formulated amino acid solution were studied. Glucose alone as energy source was infused in Group Ia. The mixture of glucose and fructose was infused in Group Ib. In these patients (Group I), a commercially available amino acid solution was administered simultaneously. A specially formulated amino acid, rich in branched-chain amino acids but poor in aromatic amino acids was infused with the mixture of glucose and fructose in Group II. There was no remarkable elevation of blood glucose and lactate levels in all patients. Blood glucose levels in Group Ib were maintained lower than that in Group Ia. Except for serum alkaline phosphatase, no remarkable abnormality was observed in liver function tests. Body weight changes were less than 5% in each group. Average nitrogen balances were -44.5 mg/kg/day in Group Ia, -5.5 mg/kg/day in Group Ib, -51.5 mg/kg/day in Group II. While the abnormalities in serum amino acid pattern and molar ratio of leucine, isoleucine, and valine to phenylalanine and tyrosine tend to be more enhanced in Group I, these abnormalities returned to near normal in Group II during TPN. By multiple linear regression analyses, 45 kcal/kg/day of energy intake would be required to maintain nitrogen equilibrium and zero body weight change. And when nitrogen intakes were 159 mg/kg/day in Group Ia, 114 mg/kg/day in Group Ib, and 189 mg/kg/day in Group II at 45 kcal/kg/day in energy intake, nitrogen balances were expected to be equivalent. These results suggest that postoperative TPN is good for nutritional support in patients with liver disorders. And also, the combination of glucose and fructose has better effect on nitrogen balance. The postoperative TPN with a specially formulated amino acid solution may be a valuable way of maintaining the nutritional status as well as normal serum amino acid pattern in patients with liver disorders.
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