Mean time required to achieve a loop shape was as follows: MICHISUJI, 6.2 seconds M-through, 8.7 seconds VisiGlide 2, 11.0 seconds and Revowave, 7.1 seconds.Д¬onclusion In conclusion, characteristics of flexibility and stiffness among guidewires were significantly different in the ex-vivo study.

During an experimental study regrading deformation behavior before forming a loop shape, maximum load was lower for MICHISUJI (6.8 g) than for other guidewires (Jagwire, M-through, VisiGlide 2, Revowave, and Pathcorse ). Results Flexibility and stiffness of each guidewire differed significantly. Deformation behavior was also recorded on video, and factors suitable for making a loop shape in each guidewire were evaluated. Flexibility of the tip, shaft stiffness, and the ability to form a loop were evaluated for each type in an ex vivo model. Methods This experimental study evaluated six guidewires (0.025-inch, angle type): MICHISUJI VisiGlide 2 Jagwire Pathcorse RevoWave-О± UltraHard 2 and M-through. The aim of this experimental study was thus to evaluate which types of guidewire can most easily form a loop shape. To prevent duct penetration, making a loop shape with the guidewire might provide a useful technique. All rights reserved.Д«ackground and study aims Duct penetration by the guidewire sometimes occurs during endoscopic retrograde cholangiography, which might lead to adverse events such as acute pancreatitis. The use of Visiglide 2 guidewire might facilitate the selective biliary cannulation compared to conventional guidewire in terms of reducing cannulation time and papilla attempts. The number of papillary attempts for cannulation was significantly fewer in group V (1.84) than those of group C (3.44 P<0.01). The mean times for biliary cannulation were 174.9 sec for group V and 363.5 sec for group C (P=0.04).

The final success rate for biliary cannulation was 100% in both groups. The primary selective biliary cannulation of group V tends to show a higher success rate than that of group C (group V, 96% (48/50) group C, 86% (43/50) P=0.08). The primary success rate of biliary cannulation, cannulation time, number of papillary attempts, number of pancreatic duct cannulations, total procedure time and final success rate were recorded during the endoscopic procedure.ДЄ total of 100 patients were enrolled and assigned to group V (n=50) and C (n=50) in the current study. We randomly allocated the patients to the Visiglide 2 group (Group V) or conventional guidewire group (Group C). We conducted a prospective, randomized controlled study involving patients with a naГЇve papilla who required biliary cannulation in a single center. In the current study, we evaluated the effectiveness of a stiff-shaft and flexible-tip guidewire (Visiglide2(В®) ) for selective biliary access. Endoscopic access to the common bile duct remains difficult in 10% of cases undergoing endoscopic retrograde cholangiopancreaticography (ERCP).

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