Pre-emptive Endoscopic Vacuum Therapy Reduces the Incidence of Anastomotic Leakage After Colorectal Cancer Surgery: a Randomized Controlled Study

"PEVT Procedures~After the anastomosis is completed and endoscopy confirms that the anastomotic site is intact and without bleeding, the following procedures are carried out immediately (usually within 30 minutes after the completion of the anastomosis):~1. EVT device selection: Use an open-pore polyurethane sponge (OPPS) connected to a 16Fr nasogastric tube, with the sponge cut to a size of 2 cm × 3 cm.~2. Placement method: Insert the sponge through the anus to the anastomotic site in the intestinal lumen, set the negative pressure to low intensity (-50 to -100 mmHg), and connect to an external negative pressure suction device for continuous suction."