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Flow chart of stent implantation. (A-C), red arrows indicate anastomotic fistula; (D), yellow arrows indicate the stent guidewire; (E, F) denote the release of the stent under colonoscopy. This stent is a nickel-titanium memory alloy self-expanding stent, which is modified from a nickel-titanium memory alloy esophageal stent and is a coated stent. It is 10cm in length with a diameter of 32 to 35mm on the proximal port side and 28 to 30mm on the distal anal side.
