Evidence map›Paper›PMID 32426140›Full record

ArticleJournal of intensive care2020

Association between low pH and unfavorable neurological outcome among out-of-hospital cardiac arrest patients treated by extracorporeal CPR: a prospective observational cohort study in Japan.

Yohei Okada, Takeyuki Kiguchi, Taro Irisawa, Kazuhisa Yoshiya, Tomoki Yamada, Koichi Hayakawa, Kazuo Noguchi, Tetsuro Nishimura, Takuya Ishibe, Yoshiki Yagi and 18 more

Open access · goldAbstract read
In one paragraph

Article in Journal of intensive care, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 26 papers.

0numbers the graph read from it
0cells of the map it votes in
26citing papers in PubMed
4.8field-weighted citation impact, top 4% of its field
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

26 citing papers in PubMed, 48 citations in OpenAlex.

  1. Observational
  2. Reevaluating basic life support termination criteria using post-arrival data in Japanese out-of-hospital cardiac arrest patients.Critical care and resuscitation : journal of the Australasian Academy of Critical Care Medicine · 2026
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  6. Clinical Outcomes of Out-of-Hospital Cardiac Arrest with ROSC: Insights from a Specialized Referral Center in Vietnam.Acta informatica medica : AIM : journal of the Society for Medical Informatics of Bosnia & Herzegovina : casopis Drustva za medicinsku informatiku BiH · 2025
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  12. Intra-arrest blood-based biomarkers for out-of-hospital cardiac arrest: A scoping review.Journal of the American College of Emergency Physicians open · 2024
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  14. Review
  15. Observational
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  17. Association between stress hyperglycemia on admission and unfavorable neurological outcome in OHCA patients receiving ECPR.Clinical research in cardiology : official journal of the German Cardiac Society · 2023
    Article
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  19. Observational
  20. Observational
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

28 authors at 12 institutions in 1 country.

Yohei Okada1Department of Preventive Services, School of Public Health, Kyoto University, Kyoto, Japan.
Takeyuki Kiguchi3Kyoto University Health Service, Yoshida Honmachi, Sakyo, Kyoto, 606-8501 Japan.
Taro Irisawa5Department of Traumatology and Acute Critical Medicine, Osaka University Graduate School of Medicine, Suita, Japan.
Kazuhisa Yoshiya5Department of Traumatology and Acute Critical Medicine, Osaka University Graduate School of Medicine, Suita, Japan.
Tomoki Yamada6Emergency and Critical Care Medical Center, Osaka Police Hospital, Osaka, Japan.
Koichi Hayakawa7Department of Emergency and Critical Care Medicine, Takii Hospital, Kansai Medical University, Moriguchi, Japan.
Kazuo Noguchi8Department of Emergency Medicine, Tane General Hospital, Osaka, Japan.
Tetsuro Nishimura9Department of Critical Care Medicine, Osaka City University, Osaka, Japan.
Takuya Ishibe10Department of Emergency and Critical Care Medicine, Kindai University School of Medicine, Osaka, Sayama Japan.
Yoshiki Yagi11Osaka Mishima Emergency Critical Care Center, Takatsuki, Japan.
Masafumi KishimotoOsaka Prefectural Nakakawachi Medical Center of Acute Medicine, Higashi-, Osaka, Japan.
Hiroshi ShintaniSenshu Trauma and Critical Care Center, Osaka, Japan.
Yasuyuki HayashiSenri Critical Care Medical Center, Saiseikai Senri Hospital, Suita, Japan.
Taku Sogabe15Traumatology and Critical Care Medical Center, National Hospital Organization Osaka National Hospital, Osaka, Japan.
Takaya Morooka16Emergency and Critical Care Medical Center, Osaka City General Hospital, Osaka, Japan.
Haruko Sakamoto17Department of Pediatrics, Osaka Red Cross Hospital, Osaka, Japan.
Keitaro Suzuki18Emergency and Critical Care Medical Center, Kishiwada Tokushukai Hospital, Osaka, Japan.
Fumiko Nakamura19Department of Emergency and Critical Care Medicine, Kansai Medical University, Hirakata, Osaka Japan.
Norihiro Nishioka1Department of Preventive Services, School of Public Health, Kyoto University, Kyoto, Japan.
Tasuku Matsuyama20Department of Emergency Medicine, Kyoto Prefectural University of Medicine, Kyoto, Japan.
Junya Sado21Division of Environmental Medicine and Population Sciences, Department of Social and Environmental Medicine, Graduate School of Medicine, Osaka University, Osaka, Japan.
Satoshi Matsui21Division of Environmental Medicine and Population Sciences, Department of Social and Environmental Medicine, Graduate School of Medicine, Osaka University, Osaka, Japan.
Takeshi Shimazu5Department of Traumatology and Acute Critical Medicine, Osaka University Graduate School of Medicine, Suita, Japan.
Kaoru Koike2Department of Primary care and Emergency Medicine, Graduate School of Medicine, Kyoto University, Kyoto, Japan.
Takashi Kawamura1Department of Preventive Services, School of Public Health, Kyoto University, Kyoto, Japan.
Tetsuhisa Kitamura21Division of Environmental Medicine and Population Sciences, Department of Social and Environmental Medicine, Graduate School of Medicine, Osaka University, Osaka, Japan.
Taku Iwami1Department of Preventive Services, School of Public Health, Kyoto University, Kyoto, Japan.
CRITICAL Study Group Investigators
Kyoto University · JPKansai Medical University · JPOsaka Gakuin University · JPOsaka City University · JPOsaka National Hospital · JPOsaka Prefectural Medical Center · JPThe University of Osaka · JPKishiwada Tokushukai Hospital · JPKyoto Prefectural University · JPOsaka City General Hospital · JPOsaka Mishima Emergency and Critical Care Center · JPSaiseikaisenri Hospital · JP

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundWe aimed to identify the association of pH value in blood gas assessment with neurological outcome among out-of-hospital cardiac arrest (OHCA) patients treated by extracorporeal cardiopulmonary resuscitation (ECPR).

methodsWe retrospectively analyzed the database of a multicenter prospective observational study on OHCA patients in Osaka prefecture, Japan (CRITICAL study), from July 1, 2012 to December 31, 2016. We included adult OHCA patients treated by ECPR. Patients with OHCA from external causes such as trauma were excluded. We conducted logistic regression analysis to identify the odds ratio (OR) and 95% confidence interval (CI) of the pH value for 1 month favorable neurological outcome adjusted for potential confounders including sex, age, witnessed by bystander, CPR by bystander, pre-hospital initial cardiac rhythm, and cardiac rhythm on hospital arrival.

resultsAmong the 9822 patients in the database, 260 patients were finally included in the analysis. The three groups were Tertile 1: pH ≥ 7.030, Tertile 2: pH 6.875-7.029, and Tertile 3: pH < 6.875. The adjusted OR of Tertiles 2 and 3 compared with Tertile 1 for 1 month favorable neurological outcome were 0.26 (95% CI 0.10-0.63) and 0.24 (95% CI 0.09-0.61), respectively.

conclusionsThis multi-institutional observational study showed that low pH value (< 7.03) before the implementation of ECPR was associated with 1 month unfavorable neurological outcome among OHCA patients treated with ECPR. It may be helpful to consider the candidate for ECPR.

Indexed as

Blood gas assessmentExtracorporeal life supportExtracorporeal membrane oxygenation (ECMO)Percutaneous cardiopulmonary support (PCPS)Ventricular fibrillation

Identifiers

PMID32426140
PMCPMC7212572
OpenAlexW3025130426

What OpenQuestion holds

Textmetadata
LicenceCC BY
Read underepoch 390

Registered trials

None linked

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.