Outcome of simple use of mechanical lithotripsy of difficult common bile duct stones

Table 1 Characteristics of success and failure of patient groups.

	Success (n = 272)	Failure (n = 32)	P value
Mean age	69.7	71.2	0.236
Sex(F/M)	156/116	20/12
Mean of stone size	17.1 mm	21.9 mm	<0.0001
Juxtapapillary diverticulum	109 (40.1%)	14 (43.7%)	0.689
Cholangitis	9 (3.3%)	4 (12.5%)	0.037
Pancreatitis	19 (7.0%)	5 (15.6%)	0.154
Delay bleeding	10 (3.7%)	2 (6.2%)	0.366
Perforation	0	0

Table 2 Characteristics of single and multiple session mechanical lithotripsy groups.

	Group A (n = 211)	Group B (n = 61)	P value
Mean age	69.3	70.8	0.202
Sex (F/M)	122/89	34/27
Juxtapapillary diverticulum	82 (38.9%)	27 (44.2%)	0.448
Mean of stone size	16.7 mm	18.3 mm	<0.0001
Cholangitis	3 (1.4%)	6 (9.8%)	0.0012
Pancreatitis	7 (3.3%)	12 (19.6%)	<0.0001
Delay bleeding	1 (0.4%)	9 (14.7%)	<0.0001
Perforation	0	0

Group A: single session of mechanical lithotripsy; Group B: multiple sessions of mechanical lithotripsy.