A prospective, randomized platelet-function study of heparinized oxygenators and cardiotomy suction

Area of Science:

• Cardiovascular Surgery
• Hematology
• Biomedical Engineering

Background:

• Cardiopulmonary bypass (CPB) circuits can negatively impact platelet function.
• Optimizing CPB circuits may preserve platelet function during cardiac surgery.

Purpose of the Study:

• To evaluate the impact of a heparin-coated oxygenator and salvaged autologous blood on platelet function during CPB.

Main Methods:

• Prospective, randomized trial involving 60 adult patients undergoing coronary artery bypass graft surgery.
• A 2x2 factorial design compared heparinized vs. non-heparinized oxygenators and cardiotomy suction vs. salvaged autologous blood.
• Platelet function was assessed using multiple assays, including glass-bead retention and aggregometry.

Main Results:

• Platelet function generally decreased during and immediately after CPB across all groups.
• A minor, transient difference in glass-bead assay results was observed between groups before CPB discontinuation.
• No significant differences were found in blood transfusion requirements or chest-tube drainage.

Conclusions:

• Modifications to the CPB circuit, including heparin-coated oxygenators and salvaged blood, had minimal and inconsequential effects on platelet function in this patient cohort.
• Further research may be needed to identify more effective strategies for preserving platelet function during CPB.