Learning Curve in a Western Training Center of the Circumferential En Bloc Esophageal Endoscopic Submucosal Dissection in an In Vivo Animal Model

Table 1

Circumferential ESD in the esophagus using Hook knife (KD-620LR).

Size of specimen (mm)	Procedural duration (min)	Complications
(1) 15 mm × 40 mm	235 min	Perforation
(2) 17 mm × 45 mm	232 min	Perforation
(3) 15 mm × 50 mm	233 min	Perforation
(4) 15 mm × 60 mm	215 min	Perforation
(5) 17 mm × 50 mm	200 min	Perforation
(6) 15 mm × 60 mm	169 min	Perforation
(7) 15 mm × 50 mm	150 min	Perforation
(8) 17 mm × 45 mm	180 min	None
(9) 17 mm × 50 mm	173 min	None
(10)    18 mm × 60 mm	140 min	None