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Acid-base monitoring of open-heart surgery
  1. H. G. Morgan,
  2. R. R. Ogilvie,
  3. W. F. Walker
  1. Department of Pathology of the University of St. Andrews at the Royal Infirmary, Dundee
  2. Department of Surgery of the University of St. Andrews at the Royal Infirmary, Dundee

    Abstract

    The techniques and interpretation of acid-base studies on patients undergoing open-heart surgery with extracorporeal circulation are described. The `normal' range and duration of changes in 35 surviving patients are given; these were essentially of respiratory rather than of metabolic origin, being a respiratory alkalosis induced by the anaesthetist before perfusion, and a respiratory acidosis after assisted respiration was stopped. Gross metabolic acidosis was seen only where clinically severe complications had occurred.

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