Gastrointestinal endoscopy · 2008
Chemically assisted endoscopic mechanical submucosal dissection by using mesna.
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Sumiyama Kazuki, Gostout Christopher J, Rajan Elizabeth, Bakken Timothy A, Knipschield Mary A
Аннотация
BACKGROUND: A class of thiol compounds, mesna (sodium-2-mercaptoethanesulfonate), has been used to facilitate tissue dissection in surgical fields.
OBJECTIVES: To evaluate the technical feasibility and efficacy of chemically assisted endoscopic mechanical submucosal dissection (CAEMSD) by using mesna.
DESIGN: An in vivo controlled blind trial by using porcine models.
SETTINGS: Nonsurvival study in an animal laboratory.
INTERVENTIONS: Six pigs were studied. Mucosal targets of about 2 cm (estimated) for treatment were created with a circle of cauterized spots along the greater curvature of the gastric body and the antrum. A mesna solution or the control hydroxypropyl methylcellulose solution was submucosally injected. The target mucosa was mechanically isolated with balloon dissection and removed by circumferential incision with a hook-knife inserted into the submucosal space. Necropsy and mucosal specimens from both groups were examined by histology.
RESULTS: En bloc resection of the target was achieved in all 8 attempts of the mesna group and in 7 of 8 attempts of the control group. Use of mesna significantly reduced tissue resistance to the initial balloon-catheter insertion into the submucosa and the technical difficulty of subsequent submucosal balloon dissection by using a subjective grading system (P < .05). There was no difference in histology between both groups.
CONCLUSIONS: CAEMSD is a unique methodology to facilitate mucosal resection.
OBJECTIVES: To evaluate the technical feasibility and efficacy of chemically assisted endoscopic mechanical submucosal dissection (CAEMSD) by using mesna.
DESIGN: An in vivo controlled blind trial by using porcine models.
SETTINGS: Nonsurvival study in an animal laboratory.
INTERVENTIONS: Six pigs were studied. Mucosal targets of about 2 cm (estimated) for treatment were created with a circle of cauterized spots along the greater curvature of the gastric body and the antrum. A mesna solution or the control hydroxypropyl methylcellulose solution was submucosally injected. The target mucosa was mechanically isolated with balloon dissection and removed by circumferential incision with a hook-knife inserted into the submucosal space. Necropsy and mucosal specimens from both groups were examined by histology.
RESULTS: En bloc resection of the target was achieved in all 8 attempts of the mesna group and in 7 of 8 attempts of the control group. Use of mesna significantly reduced tissue resistance to the initial balloon-catheter insertion into the submucosa and the technical difficulty of subsequent submucosal balloon dissection by using a subjective grading system (P < .05). There was no difference in histology between both groups.
CONCLUSIONS: CAEMSD is a unique methodology to facilitate mucosal resection.