British Journal of Anaesthesia, 1994, Vol. 72, No. 6 697-699
© 1994 The Board of Management and Trustees of the British Journal of Anaesthesia
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The modifying influence of anaesthesia on postoperative protein catabolism
Department of Anaesthesiology, Huddingc Hospital S-141 86 Huddinge, Sweden
Department of Anaesthesiology, South Hospital
Department of Surgery, Karolinska Hospital Box 60 500, S-104 01 Stockholm, Sweden
Department of Clinical Chemistry, Huddinge Hospital S-141 86 Huddinge, Sweden
We studied two groups of six patients scheduled for gastrointestinal surgery; they were allocated randomly to receive high- or low-dose fentanyl anaesthesia. The confounding effect of protein balance, before the trauma of surgery, on postoperative nitrogen excretion was controlled by standardized protein intake before operation, supplemented by adequate calories. The high-dose group had significantly lower stress levels during surgery, assessed by arterial blood concentrations of cortisone, adrenaline and glucose. After operation, protein catabolism was measured for 7 days. The high-dose group had significantly lower postoperative excretion of ammonia and slightly lower excretion of urea and 3-methylhistidine. Low-stress anaesthesia may thus diminish postoperative catabolism, which could be important in frail patients by reducing mortality, ICU resources, or both.
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