Nojima, Tsuyoshi - OU Author List - OKAYAMA UNIVERSITY SCIENTIFIC ACHIEVEMENT REPOSITORY

Decline in rescue breathing and its impact on outcomes in pediatric out-of-hospital cardiac arrest due to drowning: a nationwide study, 2012–2023

FullText URL	fulltext.pdf
Author	Obara, Takafumi\| Nojima, Tsuyoshi\| Matsumoto, Naomi\| Tsukahara, Kohei\| Hongo, Takashi\| Yumoto, Tetsuya\| Yorifuji, Takashi\| Nakao, Atsunori\| Naito, Hiromichi\|
Keywords	Drowning Out-of-hospital cardiac arrest Cardiopulmo naryresuscitation Child Asphyxia
Published Date	2026-08
Publication Title	Resuscitation
Volume	volume225
Publisher	Elsevier BV
Start Page	111049
ISSN	0300-9572
NCID	AA00817253
Content Type	Journal Article
language	English
OAI-PMH Set	岡山大学
Copyright Holders	©2026 The Author(s).
File Version	publisher
PubMed ID	41819340
DOI	10.1016/j.resuscitation.2026.111049
Web of Science KeyUT	001808362200001
Related Url	isVersionOf https://doi.org/10.1016/j.resuscitation.2026.111049

Cervical Clue in Spontaneous Pneumomediastinum

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Author	Nojima, Tsuyoshi\| Obara, Takafumi\| Hongo, Takashi\| Nakao, Atsunori\|
Keywords	spontaneous pneumomediastinum throat tightness cervical imaging chest radiography
Published Date	2026-03-01
Publication Title	Internal Medicine
Volume	volume65
Issue	issue5
Publisher	Japanese Society of Internal Medicine
Start Page	762
End Page	763
ISSN	0918-2918
NCID	AA10827774
Content Type	Journal Article
language	English
OAI-PMH Set	岡山大学
Copyright Holders	© 2026 by The Japanese Society of Internal Medicine
File Version	publisher
PubMed ID	40707230
DOI	10.2169/internalmedicine.5921-25
Web of Science KeyUT	001537519000001
Related Url	isVersionOf https://doi.org/10.2169/internalmedicine.5921-25

Reducing Hesitation in Resuscitation: Educational Effects of a Female-Appearing Simulator in Basic Life Support Training

JaLCDOI	10.18926/AMO/70854
FullText URL	80_3_185.pdf
Author	Kubo, Takuya\| Tsukahara, Kohei\| Hongo, Takashi\| Obara, Takafumi\| Kosaki, Yoshinori\| Nojima, Tsuyoshi\| Yumoto, Tetsuya\| Naito, Hiromichi\| Nakao, Atsunori\|
Abstract	Women are less likely than men to receive timely defibrillation during out-of-hospital cardiac arrest. We investigated whether using a simulator that is visually modified to resemble a female affects learners’ attitudes, knowledge, and performance in basic life support (BLS) training. In a BLS simulation training, first-year medical students (n=220) used a standard gender-neutral simulator (control group) or a modified simulator with a female-like appearance (intervention group). Pre- and post-training questionnaires concerning attitudes and knowledge plus a post-training skills evaluation assessed the students’ training outcomes. The intervention group initiated chest compressions significantly faster than the control group (33.1 vs. 39.8 sec, p<0.01) and achieved a significantly higher rate of correct AED pad placement (64.2% vs. 38.5%, p<0.01). While performing the resuscitation on the female-appearing manikin, the intervention group showed significantly greater increases in self-efficacy (p<0.01) and larger decreases in discomfort about removing the patient’s clothes (p<0.01). They were also significantly more likely to recognize that chest compressions can be performed (p=0.016) and AED pads can be applied (p=0.015) without removing the patient’s underwear. Using a female-appearing simulator in BLS training was thus associated with faster chest compression initiation, more accurate AED pad placement, and improved gender-sensitive attitudes and knowledge.
Keywords	resuscitation basic life support female simulator medical education gender bias
Amo Type	Original Article
Publication Title	Acta Medica Okayama
Published Date	2026-06
Volume	volume80
Issue	issue3
Publisher	Okayama University Medical School
Start Page	185
End Page	193
ISSN	0386-300X
NCID	AA00508441
Content Type	Journal Article
language	English
Copyright Holders	Copyright Ⓒ 2026 by Okayama University Medical School
File Version	publisher
Refereed	True

Biliverdin supplementation in perfusate and preservation solution attenuates ischemia-reperfusion injury in a rat donation-after-circulatory-death heart transplantation model

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Author	Tokioka, Kohei\| Nojima, Tsuyoshi\| Hirayama, Takahiro\| Hongo, Takashi\| Obara, Takafumi\| Ageta, Kohei\| Igawa, Takuro\| Aokage, Toshiyuki\| Tsukahara, Kohei\| Yumoto, Tetsuya\| Naito, Hiromichi\| Nakao, Atsunori\|
Published Date	2026-07
Publication Title	Surgery
Volume	volume195
Publisher	Elsevier BV
Start Page	110231
ISSN	0039-6060
NCID	AA00853880
Content Type	Journal Article
language	English
OAI-PMH Set	岡山大学
Copyright Holders	© 2026 The Authors.
File Version	publisher
PubMed ID	42114235
DOI	10.1016/j.surg.2026.110231
Web of Science KeyUT	001768042400001
Related Url	isVersionOf https://doi.org/10.1016/j.surg.2026.110231

Pseudoaneurysm of the thoracoacromial artery associated with habitual shoulder dislocation: a case report

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Author	Wada, Honoka\| Hamasaki, Aya\| Okamoto, Soichiro\| Yamamoto, Shunki\| Nojima, Tsuyoshi\| Yumoto, Tetsuya\| Nakao, Atsunori\|
Keywords	Pseudoaneurysm Thoracoacromial artery Shoulder dislocation Anticoagulation Endovascular embolization
Published Date	2026-04-09
Publication Title	International Journal of Emergency Medicine
Volume	volume19
Issue	issue1
Publisher	Springer Science and Business Media LLC
Start Page	139
ISSN	1865-1380
Content Type	Journal Article
language	English
OAI-PMH Set	岡山大学
Copyright Holders	© The Author(s) 2026.
File Version	publisher
PubMed ID	41952115
DOI	10.1186/s12245-026-01202-4
Web of Science KeyUT	001765260200001
Related Url	isVersionOf https://doi.org/10.1186/s12245-026-01202-4

Revisiting Adrenal Crisis Triggered by Influenza Infection: Lessons from Two Fatal Cases

JaLCDOI	10.18926/AMO/70458
FullText URL	80_2_153.pdf
Author	Ueda, Yoshiyuki\| Yumoto, Tetsuya\| Hongo, Takashi\| Obara, Takafumi\| Nojima, Tsuyoshi\| Tsukahara, Kohei\| Hasegawa, Kosei\| Futagawa, Natsuko\| Naito, Hiromichi\| Nakao, Atsunori\|
Abstract	Adrenal crisis is a life-threatening endocrine emergency that can progress within hours despite a prior diagnosis and maintenance therapy. We describe a fatal influenza-triggered adrenal crisis in two patients: a child with panhypopituitarism and an adult with prior pituitary surgery, both presenting in cardiac arrest. Despite resuscitation and intravenous hydrocortisone, a fatal hypoxic-ischemic injury or multiorgan failure occurred. These cases highlight the fulminant course of an adrenal crisis and underscore the importance of early recognition, clinician awareness, prompt parenteral hydrocortisone administration, and reinforcement of education for patients, caregivers, and healthcare providers to improve preparedness and prevent avoidable deaths.
Keywords	adrenal insufficiency cardiac arrest hydrocortisone influenza shock
Amo Type	Case Report
Publication Title	Acta Medica Okayama
Published Date	2026-04
Volume	volume80
Issue	issue2
Publisher	Okayama University Medical School
Start Page	153
End Page	157
ISSN	0386-300X
NCID	AA00508441
Content Type	Journal Article
language	English
Copyright Holders	Copyright Ⓒ 2026 by Okayama University Medical School
File Version	publisher
Refereed	True
PubMed ID	42025437
Web of Science KeyUT	001761342100009

Oculogyric Crisis During Chronic Aripiprazole Therapy: A Diagnostic Challenge in the Emergency Department

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Author	Tokioka, Kohei\| Nojima, Tsuyoshi\| Matsuo, Ippei\| Tsukahara, Kohei\| Nakao, Atsunori\|
Keywords	acute dystonia aripiprazole drug-induced movement disorder oculogyric crisis
Published Date	2026-02
Publication Title	Clinical Case Reports
Volume	volume14
Issue	issue2
Publisher	Wiley
Start Page	e72067
ISSN	2050-0904
Content Type	Journal Article
language	English
OAI-PMH Set	岡山大学
Copyright Holders	© 2026 The Author(s).
File Version	publisher
PubMed ID	41710502
DOI	10.1002/ccr3.72067
Related Url	isVersionOf https://doi.org/10.1002/ccr3.72067

Association of Wet-Bulb Globe Temperature with heat-related illness hospitalizations in Japan: a time-stratified, case-crossover study

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Author	Yamamura, Yuka\| Hongo, Takashi\| Yumoto, Tetsuya\| Sasai, Fumiya\| Tokioka, Kohei\| Obara, Takafumi\| Nojima, Tsuyoshi\| Kanda, Jun\| Yokobori, Shoji\| Naito, Hiromichi\| Yorifuji, Takashi\| Nakao, Atsunori\|
Keywords	Wet-Bulb Globe Temperature Heat stroke Heat related illness Global warming
Published Date	2026-01-05
Publication Title	International Journal of Emergency Medicine
Volume	volume19
Issue	issue1
Publisher	Springer Science and Business Media LLC
Start Page	11
ISSN	1865-1380
Content Type	Journal Article
language	English
OAI-PMH Set	岡山大学
Copyright Holders	© The Author(s) 2025.
File Version	publisher
PubMed ID	41491406
DOI	10.1186/s12245-025-01112-x
Web of Science KeyUT	001663188000001
Related Url	isVersionOf https://doi.org/10.1186/s12245-025-01112-x

Association of Carboxyhemoglobin With Severity and Outcomes in Hypothermic Patients: A Retrospective Cohort Study

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Author	Miyoshi, Yuya\| Yumoto, Tetsuya\| Hongo, Takashi\| Obara, Takafumi\| Nojima, Tsuyoshi\| Naito, Hiromichi\| Nakao, Atsunori\|
Keywords	carbon monoxide carboxyhemoglobin heme oxygenase hypothermia sepsis
Published Date	2025-11-27
Publication Title	Cureus
Volume	volume17
Issue	issue11
Publisher	Springer Science and Business Media LLC
Start Page	e97962
ISSN	2168-8184
Content Type	Journal Article
language	English
OAI-PMH Set	岡山大学
Copyright Holders	© Copyright 2025 Miyoshi et al.
File Version	publisher
PubMed ID	41458777
DOI	10.7759/cureus.97962
Related Url	isVersionOf https://doi.org/10.7759/cureus.97962

Characteristics of out-of-hospital cardiac arrest due to cerebrovascular disorders: a nationwide, retrospective, observational study

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Author	Ueda, Yoshiyuki\| Nojima, Tsuyoshi\| Obara, Takafumi\| Hongo, Takashi\| Yumoto, Tetsuya\| Tsukahara, Kohei\| Yorifuji, Takashi\| Nakao, Atsunori\| Naito, Hiromichi\|
Keywords	Cardiac arrest Cardiopulmonary resuscitation Cerebral hemorrhage Stroke Subarachnoid hemorrhage
Published Date	2025-11
Publication Title	Resuscitation Plus
Volume	volume26
Publisher	Elsevier BV
Start Page	101145
ISSN	2666-5204
Content Type	Journal Article
language	English
OAI-PMH Set	岡山大学
Copyright Holders	© 2025 The Author(s).
File Version	publisher
PubMed ID	41312446
DOI	10.1016/j.resplu.2025.101145
Web of Science KeyUT	001619366500001
Related Url	isVersionOf https://doi.org/10.1016/j.resplu.2025.101145

Subcutaneous and Periorbital Emphysema Following a Dental Procedure

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Author	Obara, Takafumi\| Nojima, Tsuyoshi\| Nakatsuji, Kazuki\| Hongo, Takashi\| Yumoto, Tetsuya\| Nakao, Atsunori\|
Keywords	air pressure antibiotic prophylaxis dental procedures operative subcutaneous emphysema
Published Date	2025-04-27
Publication Title	Cureus
Volume	volume17
Issue	issue4
Publisher	Springer Science and Business Media LLC
Start Page	e83089
ISSN	2168-8184
Content Type	Journal Article
language	English
OAI-PMH Set	岡山大学
Copyright Holders	© Copyright 2025 Obara et al.
File Version	publisher
PubMed ID	40438807
DOI	10.7759/cureus.83089
Related Url	isVersionOf https://doi.org/10.7759/cureus.83089

Hydrogen-rich gas enhances mitochondrial membrane potential and respiratory function recovery in Caco-2 cells post-ischemia-reperfusion injury

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Author	Seya, Mizuki\| Aokage, Toshiyuki\| Meng, Ying\| Hirayama, Takahiro\| Obara, Takafumi\| Nojima, Tsuyoshi\| Yoshinori, Kosaki\| Yumoto, Tetsuya\| Watanabe, Akihiro\| Yamada, Taihei\| Naito, Hiromichi\| Nakao, Atsunori\|
Keywords	Intestinal ischemia-reperfusion injury Molecular hydrogen Hydrogen gas therapy Caco-2 cells Mitochondrial function Hypoxia-inducible factor-1α (HIF1α)
Published Date	2025-10
Publication Title	Biochemical and Biophysical Research Communications
Volume	volume786
Publisher	Elsevier BV
Start Page	152753
ISSN	0006-291X
NCID	AA00564395
Content Type	Journal Article
language	English
OAI-PMH Set	岡山大学
Copyright Holders	© 2025 The Authors.
File Version	publisher
PubMed ID	41043278
DOI	10.1016/j.bbrc.2025.152753
Web of Science KeyUT	001588631300004
Related Url	isVersionOf https://doi.org/10.1016/j.bbrc.2025.152753

Pediatric stroke risk and neurotrauma from roller coasters in amusement parks

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Author	Morikawa, Tomoki\| Obara, Takafumi\| Nojima, Tsuyoshi\| Tokioka, Kohei\| Nakao, Atsunori\| Tsukahara, Kohei\|
Keywords	amusement parks brain injuries carotid artery dissection stroke vertebral artery dissection
Published Date	2025-01
Publication Title	Pediatrics International
Volume	volume67
Issue	issue1
Publisher	Wiley
Start Page	e70221
ISSN	1328-8067
NCID	AA11320483
Content Type	Journal Article
language	English
OAI-PMH Set	岡山大学
Copyright Holders	© 2025 The Author(s).
File Version	publisher
PubMed ID	41045005
DOI	10.1111/ped.70221
Web of Science KeyUT	001587547500001
Related Url	isVersionOf https://doi.org/10.1111/ped.70221

Successful Transplantation of Multiple Organs from Donor after Helium Asphyxiation: First Case Report in Japan

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Author	Jinno, Shunta\| Hongo, Takashi\| Obara, Takafumi\| Nojima, Tsuyoshi\| Tsukahara, Kohei\| Yumoto, Tetsuya\| Naito, Hiromichi\| Nakao, Atsunori\|
Keywords	brain death heart arrest helium
Published Date	2025-04-28
Publication Title	JMA Journal
Volume	volume8
Issue	issue2
Publisher	Japan Medical Association
Start Page	650
End Page	653
ISSN	2433-3298
Content Type	Journal Article
language	English
OAI-PMH Set	岡山大学
Copyright Holders	© Japan Medical Association
File Version	publisher
PubMed ID	40416025
DOI	10.31662/jmaj.2024-0395
Web of Science KeyUT	001450822700001
Related Url	isVersionOf https://doi.org/10.31662/jmaj.2024-0395

Compression only CPR and mortality in pediatric out-of-hospital cardiac arrest during COVID-19 pandemic

FullText URL	fulltext.pdf
Author	Obara, Takafumi\| Naito, Hiromichi\| Matsumoto, Naomi\| Tsukahara, Kohei\| Hongo, Takashi\| Nojima, Tsuyoshi\| Yumoto, Tetsuya\| Yorifuji, Takashi\| Nakao, Atsunori\|
Keywords	Cardiopulmonary resuscitation Out-of-hospital Pediatrics Artificial respiration COVID-19 pandemic
Published Date	2025-10
Publication Title	Resuscitation
Volume	volume215
Publisher	Elsevier BV
Start Page	110706
ISSN	0300-9572
NCID	AA00817253
Content Type	Journal Article
language	English
OAI-PMH Set	岡山大学
Copyright Holders	© 2025 The Author(s).
File Version	publisher
PubMed ID	40619060
DOI	10.1016/j.resuscitation.2025.110706
Web of Science KeyUT	001534174600001
Related Url	isVersionOf https://doi.org/10.1016/j.resuscitation.2025.110706

Mid-term (30- to 90-day) neurological changes in out-of-hospital cardiac arrest survivors receiving extracorporeal cardiopulmonary resuscitation: a nationwide retrospective study (the JAAM-OHCA registry)

FullText URL	fulltext.pdf
Author	Hongo, Takashi\| Yumoto, Tetsuya\| Nojima, Tsuyoshi\| Obara, Takafumi\| Ueda, Yoshiyuki\| Yorifuji, Takashi\| Nakao, Atsunori\| Naito, Hiromichi\|
Keywords	Post-cardiac arrest syndrome Cardiac arrest ECPR Patient outcome assessment Prognostication Venoarterial ECMO
Published Date	2025-09
Publication Title	Resuscitation Plus
Volume	volume25
Publisher	Elsevier BV
Start Page	101057
ISSN	2666-5204
Content Type	Journal Article
language	English
OAI-PMH Set	岡山大学
Copyright Holders	© 2025 The Author(s).
File Version	publisher
PubMed ID	40978708
DOI	10.1016/j.resplu.2025.101057
Web of Science KeyUT	001561245500001
Related Url	isVersionOf https://doi.org/10.1016/j.resplu.2025.101057

Organ Donation after Extracorporeal Cardiopulmonary Resuscitation: Clinical and Ethical Perspectives

JaLCDOI	10.18926/AMO/69147
FullText URL	79_4_221.pdf
Author	Yumoto, Tetsuya\| Naito, Hiromichi\| Hongo, Takashi\| Obara, Takafumi\| Kosaki, Yoshinori\| Ageta, Kohei\| Nojima, Tsuyoshi\| Tsukahara, Kohei\| Nakao, Atsunori\|
Abstract	Extracorporeal cardiopulmonary resuscitation (ECPR) has evolved into a life-saving therapy for select cardiac arrest patients, yet a growing body of evidence suggests it also holds promise as a bridge to organ donation in non-survivors. This review explores the clinical outcomes, ethical complexities, and evolving policies surrounding organ donation after ECPR. We summarize recent international and Japanese data demonstrating favorable graft function from ECPR donors, with the exception of lung transplantation. The ethical challenges — particularly those involving brain death determination on extracorporeal membrane oxygenation and adherence to the dead donor rule — are discussed in the context of Japan’s recent regulatory reforms. Additionally, we highlight the importance of structured end-of-life communication through multidisciplinary team meetings in facilitating ethically sound transitions from rescue efforts to donation pathways. Moving forward, improvements in donor management, standardized legal frameworks, and public and professional education are essential to optimizing the life-saving and life-giving potential of ECPR.
Keywords	brain death end-of-life care ethical dilemmas extracorporeal cardiopulmonary resuscitation
Amo Type	Review
Publication Title	Acta Medica Okayama
Published Date	2025-08
Volume	volume79
Issue	issue4
Publisher	Okayama University Medical School
Start Page	221
End Page	229
ISSN	0386-300X
NCID	AA00508441
Content Type	Journal Article
language	English
Copyright Holders	Copyright Ⓒ 2025 by Okayama University Medical School
File Version	publisher
Refereed	True
PubMed ID	40859438
Web of Science KeyUT	001566286400001

Association of emergency intensive care unit occupancy due to brain-dead organ donors with ambulance diversion

FullText URL	fulltext.pdf
Author	Yumoto, Tetsuya\| Obara, Takafumi\| Hongo, Takashi\| Nojima, Tsuyoshi\| Tsukahara, Kohei\| Hisamura, Masaki\| Nakao, Atsunori\| Yorifuji, Takashi\| Naito, Hiromichi\|
Keywords	Ambulance diversion Bed occupancy Brain death Emergency medical services Intensive care units Organ donation
Published Date	2025-04-12
Publication Title	Scientific Reports
Volume	volume15
Issue	issue1
Publisher	Nature Portfolio
Start Page	12633
ISSN	2045-2322
Content Type	Journal Article
language	English
OAI-PMH Set	岡山大学
Copyright Holders	© The Author(s) 2025
File Version	publisher
PubMed ID	40221631
DOI	10.1038/s41598-025-97198-7
Web of Science KeyUT	001466042000027
Related Url	isVersionOf https://doi.org/10.1038/s41598-025-97198-7

Association of blood carboxyhemoglobin levels with mortality and neurological outcomes in out-of-hospital cardiac arrest

FullText URL	fulltext.pdf
Author	Hongo, Takashi\| Yumoto, Tetsuya\| Naito, Hiromichi\| Hiraoka, Tomohiro\| Murakami, Yuya\| Obara, Takafumi\| Nojima, Tsuyoshi\| Aokage, Toshiyuki\| Nakao, Atsunori\|
Keywords	brain injury carbon monoxide carboxyhemoglobin cardiac arrest resuscitation
Published Date	2025-03-23
Publication Title	Acute Medicine & Surgery
Volume	volume12
Issue	issue1
Publisher	Wiley
Start Page	e70053
ISSN	2052-8817
Content Type	Journal Article
language	English
OAI-PMH Set	岡山大学
Copyright Holders	© 2025 The Author(s).
File Version	publisher
PubMed ID	40130086
DOI	10.1002/ams2.70053
Web of Science KeyUT	001450042700001
Related Url	isVersionOf https://doi.org/10.1002/ams2.70053

Transversal Survey of Emergency Medicine Policy and Quality Metrics in Japan' s Regional Health Care Plans

FullText URL	fulltext.pdf
Author	Iida, Atsuyoshi\| Saito, Shinya\| Hamada, Jun\| Nakamura, Shunsuke\| Nojima, Tsuyoshi\| Naito, Hiromichi\| Mikane, Takeshi\|
Keywords	emergency medicine indicator measure quality assurance quality improvement
Published Date	2023
Publication Title	JMA Journal
Volume	volume6
Issue	issue3
Publisher	Japan Medical Association
Start Page	284
End Page	291
ISSN	2433-3298
Content Type	Journal Article
language	English
OAI-PMH Set	岡山大学
Copyright Holders	© Japan Medical Association
File Version	publisher
PubMed ID	37560366
DOI	10.31662/jmaj.2022-0172
Web of Science KeyUT	001163814800013
Related Url	isVersionOf https://doi.org/10.31662/jmaj.2022-0172