Foaming biocompatible and biodegradable PBAT/PLGA as fallopian tube stent using supercritical carbon dioxide

Tubal pregnancy is a common abnormal pregnancy manifestation, and the ordinary conservative treatment of tubal adhesion usually leads to the rupture of fallopian tube, which increases the risk of a second ectopic pregnancy. To avoid this symptom, it is suitable to implant a stent to separate the adhesion. Here we prepared the PBAT/PLGA foam as the stent material using supercritical CO2 foaming technology. With uniform macroporous structure and thin-wall feature, the foam possessed low compressive modulus in prevention of the possible second injury to the fallopian tube. The introduction of PLGA 50/50 improved the biodegradable capability of the foam, with a mass loss about 20% after a 12-week hydrolysis. After implanted into the ruptured fallopian tube of the rabbit model, the foam displayed excellent biocompatibility, and provided a good support to prevent tubal adhesion. As such, this work provides the foam material as a promising candidate for fallopian tube stent to remedy the tubal adhesion.