A Novel Bioabsorbable Covered Stent for Advancing Bile Duct Injury Management: A Preclinical Study in a Porcine Model...

Area of Science:

• Gastroenterology and Hepatology
• Biomaterials Science
• Surgical Innovation

Background:

• Biliary tract injuries pose significant clinical challenges.
• Current treatments using metallic and plastic stents have limitations.
• Novel therapeutic approaches are needed for effective bile duct injury management.

Purpose of the Study:

• To evaluate the efficacy of a novel self-expandable bioabsorbable covered stent (SEBCS) for treating bile duct injuries.
• To assess the regenerative potential of SEBCS in extrahepatic bile duct injury models.
• To determine the safety and feasibility of SEBCS implantation.

Main Methods:

• Development of a novel SEBCS by covering a self-expandable bioabsorbable stent with a bioabsorbable tube.
• Surgical implantation of SEBCS into the extrahepatic bile ducts of five pigs under general anesthesia.
• Postoperative monitoring including hepatobiliary enzyme levels, histological evaluation, and cholangiography at 10 weeks.

Main Results:

• Successful SEBCS insertion into all animal subjects.
• Histological analysis revealed significant epithelial regeneration and peribiliary gland formation at the injury site.
• Cholangiography confirmed the absence of stenosis in the injured bile ducts.
• Hepatobiliary enzyme levels showed transient mild elevation, returning to baseline by 10 weeks.

Conclusions:

• The novel SEBCS demonstrated potential for promoting bile duct regeneration.
• SEBCS implantation appears to be a safe and feasible endoscopic treatment for extrahepatic bile duct injuries.
• This technology holds promise as an innovative therapeutic option for biliary tract injuries.