Prenatal developmental safety of functional polyurethanes for cardiovascular implants

Area of Science:

• Biomaterials Science
• Toxicology
• Cardiovascular Engineering

Background:

• Polyurethanes are widely used in cardiovascular implants due to their biocompatibility.
• Developmental toxicity data for polyurethanes is limited.
• Novel polycarbonate urethanes with functionalized side chains were developed for potential biomedical applications.

Purpose of the Study:

• To investigate the developmental toxicity of novel polycarbonate urethanes.
• To assess the safety of polyurethane degradation products in pregnant rats.
• To evaluate the potential of these materials for cardiovascular implant applications.

Main Methods:

• Two polycarbonate urethanes were synthesized and characterized.
• Materials were degraded via saline extraction.
• Degradation products were administered to pregnant Sprague-Dawley rats.
• Fetuses were examined for malformations.

Main Results:

• Polyurethane degradation was confirmed using spectroscopic and chromatographic methods.
• No maternal toxicity was observed in the treated rats.
• No significant external, skeletal, or visceral malformations were found in the fetuses.

Conclusions:

• The tested polycarbonate urethanes and their degradation products exhibit no developmental toxicity in rats.
• These materials demonstrate promising safety profiles for future cardiovascular implant development.
• Further studies are warranted for their application in vascular grafts.