Biomaterial development for cardiopulmonary bypass

Area of Science:

• Biomaterials Science
• Immunology
• Cardiovascular Surgery

Background:

• Cardiopulmonary bypass (CPB) utilizes foreign materials, potentially triggering adverse inflammatory responses.
• The exact cause of this inflammatory response during CPB is not fully understood.
• Current strategies to mitigate CPB-induced inflammation include surface modifications and pharmacological interventions.

Purpose of the Study:

• To investigate the role of plasticizers in polyvinyl chloride (PVC) tubing in CPB-related inflammation.
• To evaluate the impact of plasticizer removal on the biocompatibility of CPB circuits.
• To compare the efficacy of plasticizer removal with established anti-inflammatory strategies.

Main Methods:

• Washing plasticizer from the surface of PVC tubing used in CPB circuits.
• Assessing biocompatibility by measuring the upregulation of CD11b on neutrophils.
• Utilizing non-plasticized PVC substitutes in CPB circuits.

Main Results:

• Washing plasticizer from PVC tubing significantly enhanced biocompatibility.
• Non-plasticized PVC substitutes also demonstrated improved biocompatibility.
• The observed benefits of plasticizer removal were comparable to heparin surface coating.

Conclusions:

• Plasticizers in PVC tubing contribute to the inflammatory response during CPB.
• Removing plasticizers or using non-plasticized alternatives is an effective strategy to improve CPB biocompatibility.
• This approach offers an alternative or adjunct to conventional methods like heparin coating for reducing CPB-induced inflammation.