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Hiroshi Nakagawara,Kenji Yamao,Takuji Gotoda,Daiichiro Kikuta,Akinori Takei,Kunio Iwatsuka,Toshimi Takahashi,Masahiro Ogawa,Akihiro Henmi,Makio Kobayashi,Mitsuhiko Moriyama 소화기인터벤션의학회 2019 Gastrointestinal Intervention Vol.8 No.2
Background: Endoscopic-guided placement of metal stents for unresectable malignant hilar biliary obstruction (UMHBO) is performed using partial stent-in-stent or side-by-side (SBS) techniques. The latter involves placing sequential stents within the bile duct. Excessive dilation of the bile duct during stent placement can have serious effects on the surrounding organs.Methods: This study details seven cases of SBS placement of 8.0 mm metal stents for UMHBO. Histopathological examinations were performed to identify the effects on the bile duct and surrounding tissues.Results: The mean post-placement diameter of the bile ducts was 13.86 mm, and no compression necrosis or thrombi were observed in surrounding tissues. Cholangitis occurred in five cases, and death occurred as a result of cholecystitis in one case. Conclusion: The use of 8.0-mm stents for SBS is unlikely to have major negative effects on peribiliary tissues and blood vessels. However, post-placement cholecystitis can result in increased mortality; thus, gallbladder drainage should be considered.
Hiroshi Nakagawara,Kenji Yamao,Takuji Gotoda,Daiichiro Kikuta,Akinori Takei,Kunio Iwatsuka,Toshimi Takahashi,Masahiro Ogawa,Akihiro Henmi,Makio Kobayashi,Mitsuhiko Moriyama 소화기인터벤션의학회 2019 International journal of gastrointestinal interven Vol.8 No.2
Background: Endoscopic-guided placement of metal stents for unresectable malignant hilar biliary obstruction (UMHBO) is performed using partial stent-in-stent or side-by-side (SBS) techniques. The latter involves placing sequential stents within the bile duct. Excessive dilation of the bile duct during stent placement can have serious effects on the surrounding organs.Methods: This study details seven cases of SBS placement of 8.0 mm metal stents for UMHBO. Histopathological examinations were performed to identify the effects on the bile duct and surrounding tissues.Results: The mean post-placement diameter of the bile ducts was 13.86 mm, and no compression necrosis or thrombi were observed in surrounding tissues. Cholangitis occurred in five cases, and death occurred as a result of cholecystitis in one case. Conclusion: The use of 8.0-mm stents for SBS is unlikely to have major negative effects on peribiliary tissues and blood vessels. However, post-placement cholecystitis can result in increased mortality; thus, gallbladder drainage should be considered.