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Related Experiment Videos

Superior hemodynamics in left heart bypass without systemic heparinization.

L K von Segesser1, B M Weiss, A Gallino

  • 1Department of Surgery, University Hospital, Zurich, Switzerland.

European Journal of Cardio-Thoracic Surgery : Official Journal of the European Association for Cardio-Thoracic Surgery
|January 1, 1990
PubMed
Summary

Heparin-coated tubing for left heart bypass surgery significantly improves hemostasis and reduces blood loss without systemic heparinization. This approach enhances hemodynamics and lowers transfusion needs in patients.

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Area of Science:

  • Cardiovascular Surgery
  • Biomaterials Science
  • Hematology

Background:

  • Systemic heparinization during cardiopulmonary bypass can lead to bleeding complications.
  • Heparin-bonded surfaces offer a potential alternative to reduce systemic anticoagulation needs.

Purpose of the Study:

  • To evaluate the efficacy of end-point attached heparin surfaces in left heart bypass without systemic heparinization.
  • To assess the impact on hemostasis, hemodynamics, and blood loss.

Main Methods:

  • Canine experiments (n=10) using a servo-controlled roller pump for 6-hour left heart bypass.
  • Comparison of standard tubing with systemic heparinization versus heparin-coated tubing without systemic heparinization.
  • Continuous hemodynamic monitoring and serial blood sampling.

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Main Results:

  • No increased fibrin production observed with heparin-coated surfaces without systemic heparinization.
  • Superior hemodynamics, improved hemostasis, and reduced blood loss in the heparin-coated group.
  • Lower transfusion requirements in the group without systemic heparinization.

Conclusions:

  • Left heart bypass using heparin-coated equipment without systemic heparinization is feasible and safe.
  • This method offers improved hemostasis and reduced complications.
  • Successful clinical application demonstrated in patients undergoing thoracoabdominal aneurysm resection.