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Factors Influencing Performance of Cholangioscopy-Guided Lithotripsy Including Available Different Technologies: A Prospective Multicenter Study with 94 Patients

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Abstract

Background

Peroral cholangioscopy (POC)-guided lithotripsy is an effective treatment for difficult biliary stones. A clear definition of factors associated with the efficacy of POC-guided lithotripsy in one session and the performance of electrohydraulic lithotripsy (EHL) and laser lithotripsy (LL) have not clearly emerged.

Methods

This was a non-randomized prospective multicenter study of all consecutive patients who underwent POC lithotripsy (using EHL and/or LL) for difficult biliary stones. The primary endpoint of the study was the number of sessions needed to achieve complete ductal clearance and the factors associated with this outcome. Secondary endpoints included the evaluated efficacies of LL and EHL.

Results

Ninety-four patients underwent 113 procedures of EHL or LL. Complete ductal clearance was obtained in 93/94 patients (98.94%). In total, 80/94 patients (85.11%) achieved stone clearance in a single session. In the multivariate analysis, stone size was independently associated with the need for multiple sessions to achieve complete ductal clearance (odds ratio = 1.146, 95% confidence interval: 1.055–1.244; p = 0.001). Using ROC curves and the Youden index, 22 mm was found to be the optimal cutoff for stone size (95% confidence interval: 15.71–28.28; p < 0.001). The majority of the patients (62.8%) underwent LL in the first session. Six patients failed the first session with EHL after using two probes and therefore were crossed over to LL, obtaining ductal clearance in a single additional session with a single LL fiber. EHL was significantly associated with a larger number of probes (2.0 vs. 1.02) to achieve ductal clearance (p < 0.01). The mean procedural time was significantly longer for EHL than for LL [72.1 (SD 16.3 min) versus 51.1 (SD 10.5 min)] (p < 0.01).

Conclusions

POC is highly effective for difficult biliary stones. Most patients achieved complete ductal clearance in one session, which was significantly more likely for stones < 22 mm. EHL was significantly associated with the need for more probes and a longer procedural time to achieve ductal clearance.

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Availability of data and material

The datasets generated and/or analyzed in the present study are available from the corresponding author on reasonable request.

Abbreviations

POC:

Peroral cholangioscopy

EHL:

Electrohydraulic lithotripsy

LL:

Laser lithotripsy

EST:

Endoscopic sphincterotomy

EPLBD:

Endoscopic papillary large balloon dilation

SOC:

Single-operator cholangioscopy

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Funding

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Authors and Affiliations

Authors

Contributions

Gonçalo Alexandrino contributed to performing procedures, collection of data, analysis and interpretation of data, and drafting the manuscript; Luis Lopes contributed to conception and design of the study, performing procedures, collection of data, analysis and interpretation of data, and drafting the manuscript; João Fernandes contributed to conception and design of the study, collection of data, critical revision of the manuscript, and approval of the final draft submitted; Marta Moreira contributed to collection of data, critical revision of the manuscript, and approval of the final draft submitted; Tarcísio Araújo contributed to collection of data, preforming procedures, critical revision of the manuscript, and approval of the final draft submitted; Sara Campos contributed to collection of data, preforming procedures, critical revision of the manuscript, and approval of the final draft submitted; Rui Loureiro contributed to collection of data, preforming procedures, critical revision of the manuscript, and approval of the final draft submitted; Luísa Figueiredo contributed to collection of data, critical revision of the manuscript, and approval of the final draft submitted; Luís Carvalho Lourenço contributed to collection of data, preforming procedures, critical revision of the manuscript, and approval of the final draft submitted; David Horta contributed to collection of data, preforming procedures, critical revision of the manuscript, and approval of the final draft submitted; Tiago Bana e Costa contributed to collection of data, preforming procedures, critical revision of the manuscript, and approval of the final draft submitted; Patricio Costa contributed to statistical analysis, critical revision of the manuscript, and approval of the final draft submitted; and Jorge Canena contributed to conception and design of the study, collection of data, analysis and interpretation of data, performing procedures and drafting the manuscript.

Corresponding author

Correspondence to Jorge Canena.

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Conflict of interests

Jorge Canena is an International Consultant for Boston Scientific but did not receive any financial arrangements for this research, or any assistance with manuscript preparation. The remaining authors declare that they have no competing interests.

Ethics approval

This study was conducted in compliance with the International Conference on Harmonization guidelines for Good Clinical Practice (E6) and the 2013 Declaration of Helsinki. All patients provided written informed consent before inclusion in the study. This observational study was approved by local Ethics Committees of 6 hospitals (ULSAM 44/2018, EDOC/ULSBA/15191, EC/56-2018, HGO 23/18, HEM-CHLO 060618 and HBA 2121/18).

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Video showing bursts of an electrohydraulic probe for fragmentation of a stone. (MPG 14432 kb)

video showing complete setting of Cholangioscopy-guided laser lithotripsy for multiples stones of the bile duct. (MPG 20756 kb)

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Alexandrino, G., Lopes, L., Fernandes, J. et al. Factors Influencing Performance of Cholangioscopy-Guided Lithotripsy Including Available Different Technologies: A Prospective Multicenter Study with 94 Patients. Dig Dis Sci 67, 4195–4203 (2022). https://doi.org/10.1007/s10620-021-07305-7

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