[Toxicological study of materials for artificial heart valves]

Area of Science:

• Biomaterials Science
• Cardiovascular Engineering
• Toxicology

Background:

• Artificial heart valves require thromboresistant surfaces to prevent blood clots.
• Titanium is a common material for cardiovascular implants, but requires effective coatings.
• Carbon coatings are promising for improving biocompatibility and reducing thrombogenicity.

Purpose of the Study:

• To determine the optimal carbon coating for titanium used in artificial heart valves.
• To evaluate the biological activity and thromboresistance of different carbon coating techniques.
• To establish the best method for creating durable and biocompatible artificial heart valve components.

Main Methods:

• Fabrication of various carbon coatings on titanium substrates using different techniques.
• Toxicological evaluation of coated titanium samples under chronic experimental conditions.
• Assessment of biological activity and thromboresistance of the carbon-coated titanium samples in vivo using albino rats.

Main Results:

• Multiple carbon coating methods were investigated for their effectiveness.
• Only carbon coatings produced by ionoplasmic spraying using a chemically pure carbon target demonstrated significant biological activity.
• This specific coating method proved superior in creating a thromboresistant surface on titanium.

Conclusions:

• Ionoplasmic spraying with a pure carbon target is the optimal method for creating thromboresistant carbon coatings on titanium for artificial heart valves.
• This technique enhances the biological compatibility of cardiovascular implants.
• Further development of artificial heart valves can benefit from this optimized coating technology.