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Procedure for creating a gastric residue suction device. (A) Remove the overtube-mounted balloon section using scissors. (B,C) Make a 10 × 10 mm cross incision with scissors 10 cm from the base of the overtube. (D) Insert the ultrathin endoscope into the tube through the cross incision. (E,F) Fix the scope to the tube with silk thread 2 mm from the distal tip. (G) Reinforce the cross-incision with vinyl tape. (H) Connect the suction tube to the base of the overtube.
