Development of a Microporous Compliant Small Bore Vascular Graft

Purpose: To produce biodurable small diameter microporous vascular grafts with self-sealing properties for vascular access, for peripheral vascular and potentially for coronary artery bypass. The prosthesis should retain compliance and pulsatile flow in situ using a unique modus operandi permitting wall compression which accommodates changes in volume. Method: We have utilised efficient low temperature coagulation technology to develop a unique range of small diameter microporous vascular grafts using ChronoFlex, a biodurable polycarbonate urethane. Results: Grafts have been subjected to a range of in vitro and in vivo testing, demonstrating excellent physical and mechanical characteristics, self-sealing, maintenance of compliance and pulsatile flow in situ and patency up to twenty-two weeks.