Antireflux metallic biliary stents: Where do we stand?
Ampulla of Vater is a tricky location to insert a biliary stent as it can disrupt the function of the sphincter of Oddi, preventing reflux of duodenal contents. Therefore, it might increase the risk of cholangitis, induced by post-ERCP. In order to resolve concern of the reflux, EGIS M-valve stent is invented. Overall reflux of barium was significantly lower in ARVMS with M-valve stents than cSEMS group with conventional stents (7.7% vs 100%, P < .001). The patency of the M-valve stents was significantly longer compared with conventional SEMSs. (407 vs 220 days, P = .013). (Boumitri, C., Gaidhane, M., & Kahaleh, M. (2016). Gastrointestinal Endoscopy, 83(2), 413–415)
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