Endoscopic Ultrasound Guided Colorectal ESD and Traditional Colorectal ESD Surgery

The experimental group first underwent endoscopic ultrasound examination, with a small ultrasound probe inserted into the intestinal cavity through the biopsy port. After water injection, the lesion was scanned and (1) the direction of gravity was determined. (2) fibrosis/infiltration under the mucosa, and the fibrosis was divided into F0 (no fibrosis), F1 (cold fibrosis), or F2 (severe fibrosis). (3) The lesion was divided into nine compartments. Mark submucosal fibrosis/infiltration sites, according to nine compartments. (4) Based on the results of endoscopic ultrasound scanning of the lesion, the surgeon draw up surgical approach and perform injection and dissection.

The control group underwent injection and dissection directly.