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Endotoxemia after major vascular operations

R M Roumen1, J T Frieling, H W van Tits

  • 1Department of Surgery, University Hospital Nijmegen, The Netherlands.

Journal of Vascular Surgery
|November 1, 1993
PubMed
Summary
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Systemic endotoxemia is common after major vascular surgery, particularly in hemorrhagic shock and aortic repair. Low endotoxin levels observed did not correlate with adverse outcomes in patients studied.

Area of Science:

  • Vascular Surgery
  • Critical Care Medicine
  • Immunology

Background:

  • Endotoxemia is linked to severe conditions like adult respiratory distress syndrome and multiple organ failure.
  • Gut endotoxin translocation is a known complication of splanchnic ischemia in experimental models.

Purpose of the Study:

  • To investigate the occurrence and levels of systemic endotoxemia in patients undergoing major vascular operations.
  • To determine if endotoxemia correlates with hemorrhagic shock, splanchnic ischemia, or aortic cross-clamping and reperfusion.

Main Methods:

  • Quantitative endotoxin measurement using a limulus assay (detection limit 12.5 pg/ml).
  • Study included 11 patients with hemorrhagic shock from ruptured abdominal aortic aneurysm and 5 patients after elective abdominal aortic aneurysm repair.

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Main Results:

  • Endotoxin was detected on admission in 7/11 patients with acute conditions before treatment.
  • In elective repair patients, endotoxin appeared post-aortic cross-clamping and increased after reperfusion (all 5 patients).
  • Electively treated patients recovered without organ failure or infectious complications despite endotoxemia.

Conclusions:

  • Systemic endotoxemia is a frequent finding following major vascular surgery, especially after aortic procedures.
  • Splanchnic ischemia from hemorrhagic shock and ischemia-reperfusion injury post-aortic cross-clamping contribute to endotoxin translocation.
  • Observed low endotoxin concentrations did not appear to cause adverse effects in either acute or elective surgical patient groups.