Technical Reports of Endoscopic Retrograde Cholangiopancreatography Guidewires on the Basis of Physical Properties
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Background/Aims: Using an appropriate guidewire can increase the success rate of selective cannulation in endoscopic retrogradecholangiopancreatography. The purpose of this technical study was to investigate the characteristics of each guidewire type and toevaluate its effciency and rapidity of insertion. Methods: We conducted a three-point bending test using a universal testing machine to investigate the flexibility and bending featuresof each guidewire. 3D-printed silicone tubes with various types of stricture and a hand-made biliary tree silicone model with sixstrandedintrahepatic ducts were used to evaluate the success rate and insertion time of each guidewire. Results: In the three-point bending test, the characteristics of each guidewire were classified. We found that the bending strengthsand times were independent of shaft thickness. Using two in vitro biliary duct models, we determined that the success rate and totalinsertion time were better for guidewires with a resilient shaft and angled tip than for other types of guidewires (p<0.001). Althoughthickness of the guidewire affected the success rate (p<0.05), it did not affect the total insertion time (p≥0.05). Conclusions: Among several types of guidewire, some factors (resilient shaft, highly flexible, and angled tip) appeared to be associatedwith the effciency and rapidity of the guidewire insertion.
Abstract
Background/Aims: Using an appropriate guidewire can increase the success rate of selective cannulation in endoscopic retrogradecholangiopancreatography. The purpose of this technical study was to investigate the characteristics of each guidewire type and toevaluate its effciency and rapidity of insertion. Methods: We conducted a three-point bending test using a universal testing machine to investigate the flexibility and bending featuresof each guidewire. 3D-printed silicone tubes with various types of stricture and a hand-made biliary tree silicone model with sixstrandedintrahepatic ducts were used to evaluate the success rate and insertion time of each guidewire. Results: In the three-point bending test, the characteristics of each guidewire were classified. We found that the bending strengthsand times were independent of shaft thickness. Using two in vitro biliary duct models, we determined that the success rate and totalinsertion time were better for guidewires with a resilient shaft and angled tip than for other types of guidewires (p<0.001). Althoughthickness of the guidewire affected the success rate (p<0.05), it did not affect the total insertion time (p≥0.05). Conclusions: Among several types of guidewire, some factors (resilient shaft, highly flexible, and angled tip) appeared to be associatedwith the effciency and rapidity of the guidewire insertion.
참고문헌 (11)
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