Evidence map›Paper›PMID 40316750›Full record

ArticleSurgical endoscopy2025

Comparison of short-term outcomes for robotic rectal surgery between the hinotori™ surgical robot system and da Vinci surgical system: a single-center retrospective study using propensity score matching analysis.

Kazuki Tsujimura, Masaya Nakauchi, Junichiro Hiro, Ayaka Ito, Yuko Chikaishi, Yosuke Kobayashi, Megumu Kamishima, Gaku Inaguma, Yusuke Omura, Yeongcheol Cheong and 6 more

Abstract readComparative Study
PubMed Publisher
In one paragraph

Article in Surgical endoscopy, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 8 papers.

0numbers the graph read from it
0cells of the map it votes in
8citing 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

8 citing papers in PubMed.

  1. Article
  2. Review
  3. Review
  4. Article
  5. Article
  6. Article
  7. Article
  8. Experience with hinotoriJournal of the anus, rectum and colon · 2026
    Article
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

16 authors.

Kazuki TsujimuraDepartment of Surgery, Fujita Health University, Toyoake, Japan.
Masaya NakauchiDepartment of Advanced Robotic and Endoscopic Surgery, Fujita Health University, 1-98 Dengakugakubo, Kutsukake, Toyoake, Aichi, 470-1192, Japan.
Junichiro HiroDepartment of Surgery, Fujita Health University, Toyoake, Japan. junichiro.hiro@fujita-hu.ac.jp.ORCID http://orcid.org/0000-0002-0928-5394
Ayaka ItoDepartment of Surgery, Fujita Health University, Toyoake, Japan.
Yuko ChikaishiDepartment of Surgery, Fujita Health University, Toyoake, Japan.
Yosuke KobayashiDepartment of Surgery, Fujita Health University, Toyoake, Japan.
Megumu KamishimaDepartment of Surgery, Fujita Health University, Toyoake, Japan.
Gaku InagumaDepartment of Surgery, Fujita Health University, Toyoake, Japan.
Yusuke OmuraDepartment of Surgery, Fujita Health University, Toyoake, Japan.
Yeongcheol CheongDepartment of Surgery, Fujita Health University, Toyoake, Japan.
Tsutomu KumamotoDepartment of Surgery, Fujita Health University, Toyoake, Japan.
Koji MasumoriDepartment of Surgery, Fujita Health University, Toyoake, Japan.
Tsunekazu HanaiDepartment of Advanced Robotic and Endoscopic Surgery, Fujita Health University, 1-98 Dengakugakubo, Kutsukake, Toyoake, Aichi, 470-1192, Japan.
Ichiro UyamaDepartment of Advanced Robotic and Endoscopic Surgery, Fujita Health University, 1-98 Dengakugakubo, Kutsukake, Toyoake, Aichi, 470-1192, Japan.
Koichi SudaDepartment of Surgery, Fujita Health University, Toyoake, Japan.
Koki OtsukaDepartment of Advanced Robotic and Endoscopic Surgery, Fujita Health University, 1-98 Dengakugakubo, Kutsukake, Toyoake, Aichi, 470-1192, Japan.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundRobotic surgery for rectal cancer has grown popular in recent years and has primarily used the da Vinci Surgical System (Intuitive Surgical, CA, USA; da Vinci). In 2020, Japan introduced the hinotori™ Surgical Robot System (Medicaroid, Kobe, Japan; hinotori). We report our initial surgical experiences with robotic surgery using hinotori for rectal cancer and its feasibility and safety comparing with da Vinci.

methodsA single-institution retrospective study was conducted. Between November 2022 and November 2023, 38 and 96 patients with rectal cancer underwent robotic surgery using hinotori and da Vinci, respectively. The primary endpoint was the incidence of postoperative complications of the Clavien-Dindo classification (CD) grade ≥ II within postoperative 30 days. Secondary endpoints included surgical and console time, blood loss, conversion to other approaches, number of dissected lymph nodes, and postoperative hospital stay. A propensity score matching (PSM) analysis was used to adjust for imbalance in baseline characteristics.

resultsAfter PSM, a total of 76 patients (hinotori: 38, da Vinci: 38) were included. Compared to the da Vinci group, the hinotori group showed a similar postoperative complication rate of CD ≥ II (15.8% vs. 18.4%), comparable operative time (280.5 vs. 258 min), comparable console time (166 vs. 156 min), and less blood loss (9 vs. 17.5 mL, p = 0.025). There was no conversion in either group. The number of dissected nodes and postoperative stay were similar between the two groups.

conclusionOur findings support that robotic surgery for rectal cancer using hinotori is as safe as surgery performed using the da Vinci system.

Indexed as

Postoperative ComplicationsRectal NeoplasmsRobotic Surgical ProceduresAgedFeasibility StudiesFemaleHumansJapanLength of StayMaleMiddle AgedOperative TimePropensity ScoreRetrospective StudiesTreatment OutcomeLymph node excisionRectum neoplasmsRobotic surgical procedure

Identifiers

PMID40316750

What OpenQuestion holds

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Registered trials

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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.