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Randomized controlled trial comparing submucosal endoscopy with mucosal resection and endoscopic submucosal dissection in the esophagus and stomach: Animal study.
Digestive Endoscopy : Official Journal of the Japan Gastroenterological Endoscopy Society 2018 January
BACKGROUND AND AIM: In Western countries, endoscopic submucosal dissection (ESD) has not prevailed as a result of training problems and a target patient population. We have previously reported a hybrid ESD technique, submucosal endoscopy with mucosal resection (SEMR), in which the submucosal dissection is carried out chiefly by blunt balloon dissection. We have also reported successful application in the porcine colon. In the present study, we compared the safety and efficacy of SEMR with ESD in the porcine esophagus and stomach.
METHODS: SEMR and ESD were carried out in eight domestic pigs under general anesthesia. Resection sites were marked by circumferential coagulation. After circumferential ESD knife mucosal incision, submucosal fluid cushion (SFC) was created. In the SEMR group, the balloon catheter was inserted deep into the SFC. The balloon was then inflated and pulled back toward the endoscope tip repeatedly, altering the direction, to disrupt the submucosa. Residual strands were cut with an IT-knife. En bloc resection rates, procedure times, complications and dissection difficulty scales (DDS) were recorded prospectively. DDS were rated using a visual analog scale.
RESULTS: Thirty-two resections (8 SEMR/8 ESD in the esophagus; 8 SEMR/8 ESD in the stomach) were done with no major adverse events. There was no statistical difference between the two techniques in either location in the above categories measured.
CONCLUSIONS: SEMR and traditional ESD are comparable techniques in safety and effectiveness when carried out in the esophagus and stomach. SEMR may serve as a more appealing technical option for endoscopists who are unable to sustain a traditional ESD practice volume.
METHODS: SEMR and ESD were carried out in eight domestic pigs under general anesthesia. Resection sites were marked by circumferential coagulation. After circumferential ESD knife mucosal incision, submucosal fluid cushion (SFC) was created. In the SEMR group, the balloon catheter was inserted deep into the SFC. The balloon was then inflated and pulled back toward the endoscope tip repeatedly, altering the direction, to disrupt the submucosa. Residual strands were cut with an IT-knife. En bloc resection rates, procedure times, complications and dissection difficulty scales (DDS) were recorded prospectively. DDS were rated using a visual analog scale.
RESULTS: Thirty-two resections (8 SEMR/8 ESD in the esophagus; 8 SEMR/8 ESD in the stomach) were done with no major adverse events. There was no statistical difference between the two techniques in either location in the above categories measured.
CONCLUSIONS: SEMR and traditional ESD are comparable techniques in safety and effectiveness when carried out in the esophagus and stomach. SEMR may serve as a more appealing technical option for endoscopists who are unable to sustain a traditional ESD practice volume.
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