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(A) Size-adjusted sponge with pore size of 400–600 μm. (B) A nasogastric tube inserted into one nostril after applying a lubricating gel, then extracted through the oral cavity with forceps. (C) Endoscopic vacuum therapy (EVT) sponge-fixed using an applied 3-way nylon suture to a nasogastric tube with the side-hole removed.
