The procedure began in standard ESD fashion with the injection of a liquid cushion into the submucosa and initial entry into the submucosa with the electrocautery device. The procedure was then carried out using the new MAG-ESD technique.
The magnetic anchor was clipped to the free edge of the lesion in the stomach which now can be controlled by the large magnet outside the patient to provide an appropriate amount of tension. This makes it possible to peel back the portion of the lesion now separated from the submucosa, clearing the view of the endoscopist for safer removal of the lesion. After endoscopic resection, both the resected tissue and the magnetic anchor(s) were removed from the stomach.
The demographic and clinical features of each patient were recorded in a case report form. Two gastrointestinal endoscopists assessed the data as to whether the magnetic anchor facilitated a gastric ESD, and was classified either “supportive” or “not supportive.” The en bloc resection rate, complications, total operation time, bleeding, perforation and recurrence rate were also evaluated.