A Fully Biodegradable Patent Ductus Arteriosus Occlude

The purpose of this study was to develop a fully degradable occluder for the closure of PDA, which can be deployed percutaneously. The blends of biodegradable poly(ε-caprolactone) and poly(L-lactide-co-ε-caprolactone) with various compositions were studied as the potential material. The mechanical properties, i.e. elastic modulus and strain recovery, of the blends could be largely tailored by changing the continuous phase component. Moreover, the suitable blends were selected to fabricate a prototype and its in vitro biodegradation rate and blood compatibility, was evaluated. The current results indicate that no adverse effect on the platelet and leukocyte components of the blood. Biocompatibility implantation studies of the device showed acceptable tissue response. Finally, an artificial PDA conduit was created in a pig, and the device deployment was tested from a sheath: the device recovered within 2-3 min of unsheathing and fully sealed the conduit.