Perioperative Parenteral Nutrition. Ann Intern Med. 1987;107:252-253. doi: 10.7326/0003-4819-107-2-252
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Published: Ann Intern Med. 1987;107(2):252-253.
Parenteral feeding bypasses the enteral steps of digestion and absorption by delivering predigested nutrients directly into the bloodstream by way of central or peripheral venous access. Parenteral nutrition generally provides adequate amounts of glucose, amino acids, fat, electrolytes, vitamins, and trace elements to simulate a diet that meets the patient's nutritional needs (1). The optimal amount of each nutrient that should be provided varies in different clinical situations. Most patients, however, are given 1 to 2 g/kg body weight of a high quality protein daily in a crystalline amino acid solution. Nonprotein calories are generally given in a mixture of
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