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The Journal of Thoracic and Cardiovascular Surgery, Vol 100, 777-780, Copyright © 1990 by The American Association for Thoracic Surgery and The Western Thoracic Surgical Association
L Nilsson, L Kulander, SO Nystrom and O Eriksson
Endotoxins are biologically active substances derived from the cell wall of
degraded gram-negative bacteria. Since sterile water may also contain large
amounts of endotoxins, these are easily introduced into the manufacturing
processes of technical medical material, such as the extracorporeal
components used in cardiopulmonary bypass. In hemodialysis, the presence of
endotoxins has been related to untoward effects in patients. Using the
limulus amebocyte lysate test, we determined the serum concentration of
endotoxin in 42 patients undergoing coronary bypass operations. The values
increased during cardiopulmonary bypass, exceeding the normal range of 0 to
20 ng/L in 10 patients with a maximum of 82 ng/L, which probably indicates
endotoxin release from the extracorporeal equipment. We found no obvious
relation to postoperative morbidity. The endotoxin levels of this study are
considerably lower than those reported in two other studies of patients
having cardiopulmonary bypass. This might be due to less intraoperative
contamination but possibly also to differences in analytic methods.
ARTICLES
Endotoxins in cardiopulmonary bypass
Department of Thoracic Surgery, University Hospital, Uppsala, Sweden.
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