Comparative analysis of endoscopic precut conventional and needle knife sphincterotomy

Table 4 Frequency of pre-cut sphincterotomy with a two-step approach, and efficacy of common bile duct cannulation (pre-cut conventional sphincterotomy and pre-cut needle knife procedures)

Ref.	PS freq.	PS technique	Two-step	Efficacy
Slot et al[1]	16.5%	PNK	12%	99%
Kasmin et al[14]	18.0%	PNK	32%	93%
Huigbregtse et al[21]	19.2%	PNK	47%	91%
Dowsett et al[25]	12.8%	PNK	54%	96.2%
Shakoor et al[26]	3.8%	PNK	13%	85%
Leung et al[27]	3.9%	PNK	15%	95%
Own material	20.9 %	PNK	48%	100%
	14.7%	PCS	8.5%	94.4%
Binmoeller et al[11]	38%	PCS	9%	100%
Goff et al[12]	44.0%	PCS	14%	97%

PS: Pre-cut sphincterotomy; PCS: Pre-cut conventional sphincterotomy; PNK: Pre-cut needle knife.