AngioDynamics, Inc., and Navilyst Medical, Inc., Port Catheter Products Liability Litigation

The causation theory for port catheter failures involves material degradation and biomechanical stresses leading to microfractures, device fracture, and migration. Material breakdown, often involving polymers and possibly accelerated by biomechanical stresses such as flexion, compression, or repeated movement within the body, causes structural failure. These failures result in device migration, embolization, thrombosis, infection, and organ perforation. FDA adverse event reports and expert witness statements suggest that design flaws and inadequate warnings contribute to these failure mechanisms, with long-term material stability and biomechanical stress management being central to preventing such failures.