Evidence map›Paper›PMID 41521508›Full record

ArticleClinical endoscopy2026

Predictive factors for the necessity of peroral cholangioscopy-guided lithotripsy in the endoscopic treatment of cystic duct confluence stones: a retrospective study in Japan.

Kazuaki Miyamoto, Takahisa Ogawa, Shinsuke Koshita, Yoshihide Kanno, Hiroaki Kusunose, Toshitaka Sakai, Keisuke Yonamine, Fumisato Kozakai, Haruka Okano, Yuto Matsuoka and 3 more

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In one paragraph

Article in Clinical endoscopy, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 1 paper.

0numbers the graph read from it
0cells of the map it votes in
1citing papers in PubMed
–field-weighted citation impact
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

1 citing paper in PubMed.

  1. Review
4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

13 authors.

Kazuaki MiyamotoDepartment of Gastroenterology, Sendai City Medical Center, Sendai, Japan.
Takahisa OgawaDepartment of Gastroenterology, Sendai City Medical Center, Sendai, Japan.
Shinsuke KoshitaDepartment of Gastroenterology, Sendai City Medical Center, Sendai, Japan.
Yoshihide KannoDepartment of Gastroenterology, Sendai City Medical Center, Sendai, Japan.
Hiroaki KusunoseDepartment of Gastroenterology, Sendai City Medical Center, Sendai, Japan.
Toshitaka SakaiDepartment of Gastroenterology, Sendai City Medical Center, Sendai, Japan.
Keisuke YonamineDepartment of Gastroenterology, Sendai City Medical Center, Sendai, Japan.
Fumisato KozakaiDepartment of Gastroenterology, Sendai City Medical Center, Sendai, Japan.
Haruka OkanoDepartment of Gastroenterology, Sendai City Medical Center, Sendai, Japan.
Yuto MatsuokaDepartment of Gastroenterology, Sendai City Medical Center, Sendai, Japan.
Kento HosokawaDepartment of Gastroenterology, Sendai City Medical Center, Sendai, Japan.
Hidehito SumiyaDepartment of Gastroenterology, Sendai City Medical Center, Sendai, Japan.
Kei ItoDepartment of Gastroenterology, Sendai City Medical Center, Sendai, Japan.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundThe treatment of cystic duct confluence stones often requires peroral cholangioscopy (POCS)-guided lithotripsy. This study evaluated the efficacy of endoscopic treatment for cystic duct confluence stones and identified predictive factors for the need for POCS-guided lithotripsy.

methodsThis retrospective cohort study included 38 patients with cystic duct confluence stones treated endoscopically between September 2007 and December 2023. The primary outcome was the rate of complete stone removal. Secondary outcomes included the number of sessions, total procedure time, adverse events, and predictive factors for POCS-guided lithotripsy.

resultsThe complete stone removal rate was 100%. POCS-guided lithotripsy was required in 50% of the cases. The mean number of sessions needed for stone removal was 2.05. The mean procedure time was 93.9 minutes. The incidence of adverse events was 13%. Multivariate analysis showed that a minor axis length of the stone relative to the distal bile duct diameter greater than 1.2 was an independent predictive factor for requiring POCS-guided lithotripsy.

conclusionsEndoscopic treatment is highly effective for cystic duct confluence stones. However, POCS-guided lithotripsy was necessary when the minor axis of the stone relative to the distal bile duct diameter exceeded 1.2.

Indexed as

Cystic duct confluence stoneElectrohydraulic lithotripsyImpacted stonePeroral cholangioscopy-guided lithotripsy

Identifiers

PMID41521508
PMCPMC13054501

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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.