Evaluation of antithrombogenic thermodilution catheter

Area of Science:

• Biomaterials Science
• Medical Devices
• Cardiovascular Research

Background:

• Pulmonary artery catheterization, using Swan-Ganz catheters, carries risks of thrombosis and catheter malfunction.
• Developing effective antithrombogenic coatings is crucial for improving patient safety and device longevity.

Purpose of the Study:

• To evaluate the antithrombogenic properties and functional performance of a novel heparin-releasing coating, Anthron, for thermodilution catheters.
• To compare the efficacy of Anthron-coated catheters against standard poly (vinyl chloride) catheters in preventing thrombus formation.

Main Methods:

• Development and application of an antithrombogenic coating (Anthron) onto thermodilution catheters.
• In vivo animal experiments comparing Anthron-coated catheters with control (poly (vinyl chloride)) catheters.
• Assessment of thrombus formation on catheter surfaces and surrounding blood vessels, and evaluation of catheter sensing function over time.

Main Results:

• Anthron-coated thermodilution catheters demonstrated complete freedom from thrombus formation.
• Control catheters exhibited severe thrombus formation on both the catheter surface and blood vessels.
• Anthron-coated catheters maintained excellent sensing functions for over 3 days, while control catheters showed functional deterioration due to blood constituent deposition.

Conclusions:

• The Anthron coating provides excellent antithrombogenicity and maintains catheter function, significantly reducing the risk of complications associated with pulmonary artery catheterization.
• Anthron represents a promising advancement in medical device coatings for cardiovascular applications.
• Continuous heparin release from the Anthron surface is effective in preventing thrombus formation in vivo.