Grasper type scissors for endoscopic submucosal dissection of gastric epithelial neoplasia

Table 1 Characteristics of the enrolled patients n (%)

Characteristics	GTS	HKC	P value
Number of patients (total)	37	39	0.30
Operator 1 (Kim BW)	10	10
Operator 2 (Chung WC)	9	10
Operator 3 (Lim CH)	8	9
Operator 4 (Kim TH)	10	10
Male:female	26:11	23:16	0.19
Age (mean ± SD, yr)	62.3 ± 11.4	65.6 ± 10.1	0.58
Final pathologic diagnosis			0.68
Tubular adenoma, low grade dysplasia	22	20
Tubular adenoma, high grade dysplasia	3	6
Adenocarcinoma, well differentiated	6	8
Adenocarcinoma, moderately differentiated	6	5
Location of the lesion
Antrum	24	28
Angle	5	3
Body	8	8
Long axis (cm)	3.59 ± 1.10	3.68 ± 0.98	0.70
Short axis (cm)	2.75 ± 0.83	2.79 ± 0.84	0.83
Area (cm2)	8.30 ± 4.52	8.59 ± 4.43	0.78
Total elapsed time (mean ± SD, min)	44.54 ± 21.72	43.77 ± 21.84	0.88
Elapsed time/cm2 (mean ± SD, min/cm2)	7.53 ± 6.35	6.92 ± 5.93	0.66
En bloc resection	37/37 (100)	39/39 (100)
Incomplete resection	0/37 (0)	0/39 (0)
Complications	1/37 (2.7)	2/39 (5.1)
Perforation	1	1
> 2.0 g/dL Hb decrease 1 d after procedure	0	1

GTS: Grasper type scissors; HKC: Hook knife plus coagrasper.