Endoscopic knot tying: In vitro assessment in a porcine stomach model

Figure 1 Endoscope. A: The “in vitro” pig stomach model with the endoscope in place; B: View over muscularis propria from the gastric lumen in the submucosal space created by endoscopic submucosal dissection. Muscularis propria is about to be punctured (“peritoneoscopy”); C: Endoscope outside of the stomach simulating peritoneoscopy, with the dilated balloon in the working channel.