Initial experience from the transgastric endoscopic peritoneoscopy and biopsy: a stepwise approach from the laboratory to clinical application.

ABSTRACT

BACKGROUND AND AIM: Natural-orifice translumenal endoscopic surgery (NOTES) is a newly minimally invasive technique that gives access to the abdominal cavity via transgastric, transcolonic, transvaginal or transvesical routes. The aim of the present study was to evaluate the safety and feasibility of transgastric endoscopic peritoneoscopy and biopsy from laboratory to clinical application. METHODS: With the animals under general anesthesia, a sterile esophageal overtube was placed and a gastric antibiotic lavage was performed. Subsequently, a needle-knife and through-the-scope dilating balloon were used to make an anterior gastric wall incision through which a therapeutic gastroscope was advanced into the peritoneal cavity. After 2 weeks, another transgastric endoscopic exploration was performed in a different location of the stomach. The peritoneal cavity was examined before the gastric incision was closed. After 4 weeks of observation, necropsy was performed. In the clinical application, after gastric lavage, the first step was the creation of the gastrotomy under general anesthesia, sometime under direct vision of the laparoscopic scope. Then the endoscope can be maneuvered in the peritoneal cavity. And peritoneoscopy and biopsy were performed. Biopsies can be obtained from any suspicious areas using punch biopsy forceps. The gastrotomy was then closed with clips. The gastroscopy was examined after one week. RESULTS: Twenty-eight transgastric endoscopic peritoneoscopies and biopsies in pigs and a total of five transgastric human endoscopic peritoneoscopies and biopsies have been performed. All procedures were completed satisfactorily in the pig model and all patients. There were no intraoperative or postoperative complications. CONCLUSIONS: The advantages of peritoneoscopy and biopsy appeared to be enhanced by this approach. Patients had minor postoperative pain and minimal scarring. It is safe and feasible for us to use transgastric endoscopic peritoneoscopy and biopsy in humans.