Abstract
Background and aims
The HybridKnife water-jet system (ERBE, Tubingen, Germany) has been shown to increase dissection speed and decreased the risk of perforation during endoscopic submucosal dissection (ESD). Glycerol mixture is a viscous, long-lasting solution preferentially used by Japanese ESD experts. The combination of the HybridKnife system with a glycerol solution has not been evaluated to date.
Materials and methods
A prospective non-randomised comparative study of ESD with HybridKnife injecting of either a glycerol mixture or normal saline was performed. Twenty dissections (ten per group) were performed on four anaesthetised domestic mini-pigs. Dissection speed (mm2/min), size of the specimen (mm2), duration (min), en bloc resection rate, and bleeding and perforation rates were prospectively recorded. An evaluation of operator comfort and perception of safety (dissection score) was performed using a visual analogue scale with 0 being the worst score and 10 the best.
Results
High-pressure injection of the glycerol mixture and dissection with the HybridKnife was feasible without complications. Dissection was significantly more rapid (1.67-fold) with glycerol injection than normal saline injection (27.44 vs. 16.44 mm2/min; p < 0.001). The dissection score was significantly higher in the glycerol group than in the normal saline group (5.9 vs. 2.9; p < 0.001). No differences were observed in the rates of en bloc resection, bleeding and perforation. Seven first human cases were also easy without need of preliminary incision and technical complication.
Conclusion
High-pressure jet injection of glycerol with HybridKnife for ESD is feasible and increases the speed and safety of the procedure compared with use of normal saline.
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Disclosures
ERBE, Tübingen, Germany, provides HybridKnifes, VIO 300D and erbe jet 2 system free of charge. Karl Stortz Endoscopy, Tuttlingen, Germany, provides upper gastrointestinal endoscope Karl Stortz 13821PKS and video processor 22203011-114 free of charge. The authors have nothing to disclose.
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VIDEO 1: High-pressure injection of glycerol with hybridknife initiating pig gastric ESD (MOV 30401 kb)
VIDEO 2: High-pressure injection of glycerol with hybridknife helped by a preliminary incision (MOV 29444 kb)
VIDEO 3: High-pressure injection of glycerol with hybridknife during an ESD for a large human rectal LST (MOV 37196 kb)
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Jacques, J., Sautereau, D., Carrier, P. et al. High-pressure injection of glycerol with HybridKnife for ESD is feasible and increases the ease and speed of the procedure: an in vivo study in pigs and first use in human. Surg Endosc 29, 3382–3385 (2015). https://doi.org/10.1007/s00464-015-4072-6
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DOI: https://doi.org/10.1007/s00464-015-4072-6