Safety of endoscopic procedures with monopolar versus bipolar instruments in an ex vivo porcine model

BMC Gastroenterology

Table 1 Tissue damage due to endoscopic resection using a monopolar or bipolar snare

Size of the target lesion	Monopolar		Monopolar		Bipolar		Bipolar
	polypectomy		EMR		Polypectomy		EMR
	Dist	Area	Dist	Area	Dist	Area	Dist	Area
	(mm)	(mm²)	(mm)	(mm²)	(mm)	(mm²)	(mm)	(mm²)
5 mm	–	0.09	0.1	0	1.18	0	0.36	0
5 mm	0.6	0	0.2	0	1.05	0	0.18	0
10 mm	–	1.06	–	0.88	0.4	0	0.08	0
10 mm	–	1.36	–	0.77	1.3	0	–	0.24
15 mm	–	P	–	P	1.35	0	–	0.06
15 mm	–	2.56	–	0.66	0.93	0	–	0.07

Dist, distance from the muscularis propria to the thermal denaturation of the submucosal layer; Area, area of tissue damage to the muscularis propria; P, perforation; −, unmesurable

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