Comparative evaluation of a new disposable rotating membrane oxygenator with bubble oxygenator

Area of Science:

• Biomedical Engineering
• Cardiovascular Surgery
• Medical Devices

Background:

• Cardiopulmonary bypass (CPB) is essential for cardiac surgery.
• Oxygenators are critical components of CPB circuits.
• Traditional bubble oxygenators have known limitations.

Purpose of the Study:

• To compare the in vivo performance of adult-size bubble and rotating membrane oxygenators.
• To evaluate gas exchange efficiency and blood trauma during CPB.
• To assess the incidence of complications associated with each oxygenator type.

Main Methods:

• Adult dogs underwent closed-chest CPB for six hours.
• Two groups were studied, each using a different oxygenator type (bubble vs. rotating membrane).
• Performance was assessed by gas transfer, blood trauma markers, and complication rates.

Main Results:

• The rotating membrane oxygenator demonstrated efficient oxygen and carbon dioxide transfer.
• Minimal blood trauma, including low hemolysis and platelet destruction, was observed with the membrane oxygenator.
• The bubble oxygenator was associated with significant platelet destruction and hemolysis.
• Cerebral, cardiac, and respiratory complications were frequent with the bubble oxygenator but absent with the membrane oxygenator.

Conclusions:

• The rotating membrane oxygenator is a safer and more effective device for CPB compared to the bubble oxygenator.
• Membrane oxygenators minimize blood trauma and associated complications during CPB.
• Rotating membrane oxygenators represent an advancement in CPB technology.