Application and usefulness of a new eight‐wire basket catheter for endoscopic extraction of small common bile duct stones: A retrospective multicenter study

Abstract

Objectives Distally located small common bile duct stones are often difficult to treat or grasp endoscopically. Therefore, multiple devices, such as baskets or balloon catheters, are frequently used in such cases. However, it is desirable to use a single device for stone extraction from the perspective of cost‐effectiveness. In this multicenter study, we evaluated the efficacy of a new eight‐wire basket catheter for extracting small (≤10 mm) common bile duct stones. Methods We retrospectively analyzed the records of 144 patients who underwent stone extraction using the eight‐wire basket catheter for common bile duct stones ≤10 mm. The success rate of complete stone extraction and the risk factors for the difficulty in stone extraction with the eight‐wire catheter alone were mainly evaluated. Results The success rate of stone extraction with the eight‐wire catheter alone was 86.1%. The final rate of complete stone extraction was 98.0%. The mean of the maximum diameter of the common bile duct and the largest stone dimension were 10.5 ± 3.5, and 5.1 ± 2.1 mm, respectively. Common bile duct diameter ≥12 mm and stone diameter ≥6 mm were identified as independent risk factors for the difficulty in stone extraction with the eight‐wire catheter alone. Conclusions The success rate of the new eight‐wire basket for small common bile duct stone extraction was acceptable. The device is beneficial and could be used from the start for the extraction of small stones < 6 mm.

Novel 8‐wire basket catheter is useful for endoscopic removal of common bile duct stones up to 10 mm: A multicenter prospective study

“…A bile duct diameter ≥12 mm was a significant factor for incomplete stone removal, similar to the results shown by Inatomi et al 9 Among the cases of incomplete stone removal, four had bile duct diameters ≥12 mm; in three of these cases, although the target stones were removed, smaller stones, such as bile mud, could only be removed using the balloon catheter removal maneuver. Regarding small stones, such as bile mud, we believe that there are limitations to their removal using basket catheters, especially for large bile ducts.…”

“…The size of the basket catheter used in this study was 30 mm, which is a larger basket size than that reported previously, and this difference in size may have contributed to edema in the duodenal papillary region. Indeed, cholangitis was not observed in the study by Inatomi et al., 9 which used a 20 mm version of the same basket catheter. Regarding the perforation cases, in one of them, perforation of the pancreatic duct was caused by a guidewire during initial bile duct intubation, while in another one, perforation of the duodenal papilla occurred during insertion of the 8WB.…”

“…Inatomi et al 9 reported a high stone removal rate of 86.1% in a retrospective study using a 20-mm diameter 8WB for stones ≤10 mm. Moreover, failure of stone removal by 8WB was associated with stone diameters >6 mm and bile duct diameters >12 mm.…”

“…The material and design of the basket portion of this catheter are expected to provide a higher stone removal capacity by adhering more easily to the bile duct wall. Since there is only one retrospective report on this device, 9 we aimed to evaluate the usefulness of this novel basket catheter in a multicenter prospective study.…”

Comparison of Outcomes between a Basket Catheter and a Balloon Catheter for Endoscopic Common Bile Duct Stone Removal

“…A basket catheter can provide a sturdier grasp and reliable traction force to remove CBDSs from the bile duct orifice. Furthermore, new 8-wire spiral-type basket catheters allow removal of difficult CBDSs such as small CBDSs <6 mm in size or CBDSs impacted in the distal bile duct’s corner pocket [13, 14]. In this study, stone removal in all patients was successful because an optimal device was used, such as the new 8-wire spiral-type basket catheters, in patients with difficult to remove CBDSs.…”