Evidence map›Paper›PMID 42406101›Full record

ArticleSurgery today2026

Comparison of the short-term outcomes of robotic colorectal surgery between the hinotori™ surgical robot system and da Vinci Xi surgical system: a retrospective propensity score matching analysis and inverse probability of treatment weighting.

Chie Hagiwara, Hiroki Uehara, Norikazu Yamada, Yuto Igarashi, Yusuke Fujita, Toshinori Kobayashi, Yoshihiro Mori, Hisanori Miki, Jun Watanabe

Abstract readComparative Study
PubMed Publisher
In one paragraph

Article in Surgery today, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.

0numbers the graph read from it
0cells of the map it votes in
0citing papers in PubMed
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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

0 citing papers in PubMed.

No citing paper in PubMed yet.

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

9 authors.

Chie HagiwaraDepartment of Colorectal Surgery, Kansai Medical University, 2-5-1, Shinmachi, Hirakata, 573-1010, Osaka, Japan.
Hiroki UeharaDepartment of Colorectal Surgery, Kansai Medical University, 2-5-1, Shinmachi, Hirakata, 573-1010, Osaka, Japan.
Norikazu YamadaDepartment of Colorectal Surgery, Kansai Medical University, 2-5-1, Shinmachi, Hirakata, 573-1010, Osaka, Japan.
Yuto IgarashiDepartment of Colorectal Surgery, Kansai Medical University, 2-5-1, Shinmachi, Hirakata, 573-1010, Osaka, Japan.
Yusuke FujitaDepartment of Colorectal Surgery, Kansai Medical University, 2-5-1, Shinmachi, Hirakata, 573-1010, Osaka, Japan.
Toshinori KobayashiDepartment of Colorectal Surgery, Kansai Medical University, 2-5-1, Shinmachi, Hirakata, 573-1010, Osaka, Japan.
Yoshihiro MoriDepartment of Colorectal Surgery, Kansai Medical University, 2-5-1, Shinmachi, Hirakata, 573-1010, Osaka, Japan.
Hisanori MikiDepartment of Colorectal Surgery, Kansai Medical University, 2-5-1, Shinmachi, Hirakata, 573-1010, Osaka, Japan.
Jun WatanabeDepartment of Colorectal Surgery, Kansai Medical University, 2-5-1, Shinmachi, Hirakata, 573-1010, Osaka, Japan. watanabe.jun@kmu.ac.jp.ORCID http://orcid.org/0000-0002-7187-3664

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

purposeThe hinotori™ surgical robot system (hinotori) is the first Japanese-made surgical robot. We conducted this study to compare the short-term outcomes of robotic surgery for colorectal cancer between the hinotori and da Vinci Xi systems during the same period.

methodsThis retrospective study included 204 patients who underwent robotic colorectal cancer surgery at our institution between June 2024 and September 2025. Patients were classified into hinotori (n = 78) and da Vinci Xi (n = 126) groups. Propensity score matching (PSM) and inverse probability of treatment weighting (IPTW) were used to adjust for patient and tumor characteristics.

resultsAfter adjustment, the baseline demographics were well-balanced between the groups. No significant intergroup differences were observed in operative time, console time, blood loss, or postoperative hospital stay. Both groups had comparable histopathological outcomes. The incidence of Clavien-Dindo grade ≥ II complications did not differ significantly between the two groups after PSM or IPTW adjustments.

conclusionsThis study showed that robotic colorectal surgery using the hinotori system is as safe and feasible as surgery performed using the da Vinci Xi system.

Indexed as

Colorectal NeoplasmsPropensity ScoreRobotic Surgical ProceduresAgedColorectal Surgical ProceduresFemaleHumansLength of StayMaleMiddle AgedOperative TimeProbabilityRetrospective StudiesTime FactorsTreatment OutcomeColorectal cancerhinotori™IPTWPropensity scoreRobotic surgery

Identifiers

PMID42406101

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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.