C Cope1. 1. Department of Radiology, University of Pennsylvania Medical Center, Philadelphia 19104, USA.
Abstract
PURPOSE: To assess the efficacy of rare-earth magnets for creating a cholecystogastrostomy (CG) or cholecystojejunostomy (CJ) in nine swine. MATERIALS AND METHODS: Neodymium-iron-boron magnets or rare-earth cobalt magnets of various configuration and strength were coupled in pairs to form four CGs and five CJs. Magnets were implanted surgically in the gallbladder and jejunum, and perorally in the stomach. Gross and histologic examinations of anastomoses were performed 8-16 days later. RESULTS: All anastomoses showed good adhesion with no leakage and minimal inflammation. Anastomoses were fully patent in four CJs and one CG (mean, 12 days), partially patent in one CJ and one CG (mean, 15 days), and not patent in two CGs. Best results were noted with jacketed disc magnets with cutting rims and a 400-600-g pull. The rare-earth magnets were significantly weakened by gas sterilization in the first four CG experiments. Two of four magnets used in CJ were retained despite a fully patent anastomosis. CONCLUSION: Leak-free patent or partially patent cholecystenteric anastomoses were created by magnet compression in 9-16 days. This technique may have clinical interventional applications.
PURPOSE: To assess the efficacy of rare-earth magnets for creating a cholecystogastrostomy (CG) or cholecystojejunostomy (CJ) in nine swine. MATERIALS AND METHODS:Neodymium-iron-boron magnets or rare-earth cobalt magnets of various configuration and strength were coupled in pairs to form four CGs and five CJs. Magnets were implanted surgically in the gallbladder and jejunum, and perorally in the stomach. Gross and histologic examinations of anastomoses were performed 8-16 days later. RESULTS: All anastomoses showed good adhesion with no leakage and minimal inflammation. Anastomoses were fully patent in four CJs and one CG (mean, 12 days), partially patent in one CJ and one CG (mean, 15 days), and not patent in two CGs. Best results were noted with jacketed disc magnets with cutting rims and a 400-600-g pull. The rare-earth magnets were significantly weakened by gas sterilization in the first four CG experiments. Two of four magnets used in CJ were retained despite a fully patent anastomosis. CONCLUSION: Leak-free patent or partially patent cholecystenteric anastomoses were created by magnet compression in 9-16 days. This technique may have clinical interventional applications.