[Plasma amino acids and nitrogen balance during the postoperative period in metabolically healthy patients. 2nd communication (author's transl)].

Under parenteral and following oral nutrition in ten metabolically healthy patients the plasma amino acids were determined before and after vaginal hysterectomy. Starting from normal preoperative values there is a fall in the plasma concentration of most amino acids. The branched-chain amino acids decreased significantly, but under oral feeding they rose above the initial values. With increased plasma phenylalanine and methionine levels the concentration of cystine and tyrosine remained nearly unchanged. Glycine showed no increased levels while serine concentration was decreased even under substitution.