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Related Experiment Videos

Vacuum-assisted venous return reduces blood usage.

Michael K Banbury1, Jennifer A White, Eugene H Blackstone

  • 1Departments of Thoracic and Cardiovascular Surgery, The Cleveland Clinic Foundation, 9500 Euclid Avenue/Desk F25, Cleveland, OH 44195, USA. banburm@ccf.org

The Journal of Thoracic and Cardiovascular Surgery
|September 23, 2003
PubMed
Summary
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Vacuum-assisted venous return significantly improves patient outcomes by increasing hematocrit levels and reducing the need for red blood cell and total blood product transfusions during cardiac surgery.

Area of Science:

  • Cardiovascular Surgery
  • Medical Device Technology
  • Anesthesiology

Background:

  • Conventional gravity drainage in cardiac surgery necessitates larger cannulas and longer tubing.
  • Vacuum-assisted venous return (VAVR) offers a potential alternative to gravity drainage.
  • Previous VAVR versions allowed for smaller cannulas and shorter tubing, but clinical advantages beyond this were unclear.

Purpose of the Study:

  • To evaluate the clinical advantages of VAVR compared to conventional gravity drainage.
  • To assess if VAVR offers benefits beyond enabling smaller cannulas and shorter tubing.
  • To compare priming volume, hematocrit, and blood product usage between VAVR and gravity drainage techniques.

Main Methods:

  • A comparative study involving 150 valve operations using small-cannula VAVR.

Related Experiment Videos

  • Comparison groups included prior VAVR implementations (83 operations) and conventional gravity drainage (124 operations).
  • Multivariable analysis, covariate adjustment, and propensity-matched pairs were used to compare priming volume, hematocrit, and blood product usage.
  • Main Results:

    • VAVR with small cannulas resulted in significantly lower priming volumes (1.4 L) compared to initial VAVR (1.7 L) and gravity drainage (2.0 L).
    • Higher hematocrit values were observed during cardiopulmonary bypass with VAVR.
    • Red cell and total blood product usage were significantly reduced in patients undergoing VAVR (17% and 19%, respectively) compared to gravity drainage (37% and 39%, respectively).

    Conclusions:

    • Vacuum-assisted venous return leads to higher hematocrit values during cardiopulmonary bypass.
    • VAVR significantly decreases the requirement for red cell and total blood product transfusions.
    • These findings highlight VAVR as a beneficial technique in cardiac surgery, independent of cannula size or tubing length.