Efficacy of a Novel Narrow Knife with Water Jet Function for Colorectal Endoscopic Submucosal Dissection

Table 2

Clinicopathological results of ESD with the Flush knife BT-S in two institutions.

Case number	39
Age, mean ± SD	69.9 ± 10.3
Gender, male/female (%) (n)	69.2 (27)/30.8 (12)
Tumor size, mm, mean ± SD	32.0 ± 14.3
Tumor size ≥ 50 mm (%) (n)	15.4 (6)
Operator expert/nonexpert (%) (n)	71.8 (28)/28.2 (11)
Morphology (%) (n); Nonpolypoid/polypoid	89.7 (35)/10.3 (4)
Tumor location (%) (n); Right-sided/left-sided/rectum	61.5 (24)/15.4 (6)/23.1 (9)
Severe fibrosis (%) (n)	15.4 (6)
Difficult manipulation (%) (n)	35.9 (14)
Severe breathing movement (%) (n)	28.2 (11)
Two devices (%) (n)	43.6 (17)
Number of knife insertion, mean (range)	4.7 (1–28)
Suction case with knife (%) (n)	59.0 (23)
Mean operation time, min (range)	80.2 (19–210)
En bloc resection rate (%) (n)	97.4 (38)
Histological diagnosis (%) (n); AD/SSAP/Tis/T1	5.1 (2)/30.8 (12)/43.6 (17)/20.5 (8)
Perforation (%) (n)	2.6 (1)
Postoperative hemorrhage (%) (n)	2.6 (1)

Right-sided: cecum to transvers colon; left-sided: descending colon to sigmoid colon; Ad: adenoma; SSAP: sessile-serrated adenoma and polyp.