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Related Experiment Videos

Effects of massive transfusion on oxygen availability

J O Auler Júnior1, E Bonetti, A C Hueb

  • 1Heart Institute, Hospital das Clínicas, Faculdade de Medicina, Universidade de São Paulo, Brazil.

Sao Paulo Medical Journal = Revista Paulista De Medicina
|October 21, 1998
PubMed
Summary

Massive blood transfusions after cardiac surgery can impair oxygen transport, leading to high lactate and low P50 levels in non-survivors. These findings suggest cell oxygenation disturbances in patients receiving massive transfusions.

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Area of Science:

  • Cardiovascular Surgery
  • Transfusion Medicine
  • Critical Care Medicine

Background:

  • Massive blood replacement is a critical intervention in complex cardiovascular surgeries.
  • Understanding the physiological impact of massive transfusions is crucial for patient outcomes.
  • Oxygen-derived parameters, hemodynamics, and biochemical markers provide insights into cellular function post-transfusion.

Purpose of the Study:

  • To investigate oxygen-derived parameters, hemodynamic, and biochemical data in patients undergoing massive blood replacement after cardiac surgery.
  • To identify potential markers associated with adverse outcomes in this patient cohort.

Main Methods:

  • Prospective study conducted at the Heart Institute, University of São Paulo, Brazil.
  • Involved twelve patients after cardiac surgery requiring massive transfusion.

Related Experiment Videos

  • Monitored oxygen parameters, 2,3 Diphosphoglycerate (2,3 DPG), lactate, and blood gases.

    • Main Results:

    • Non-survivors (n=6) exhibited significantly higher lactate and lower P50 levels compared to survivors (p < 0.05).
    • Both groups showed increased oxygen consumption and O2 extraction, with no significant intergroup differences.
    • Slightly reduced 2,3 Diphosphoglycerate levels were observed in both survivor and non-survivor groups.

    Conclusions:

    • Massive transfusions in cardiovascular surgery patients are associated with disturbances in cellular oxygenation.
    • Inadequate oxygen transport appears to be a contributing factor to these observed disturbances.
    • Lactate and P50 levels may serve as indicators of oxygen transport adequacy post-massive transfusion.