Osamu Nomura

Dr. Osamu Nomura

Department of Emergency and Disaster Medicine, Hirosaki University, 5 Zaifu-cho, Hirosaki, Aomori 036-8562, Japan
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Research Focus & Metrics

Academic Career Length

14Years (2013-Present)

(Calculated once Scilit publication data is synced: current year − year of first publication + 1)

Representative Publications

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22 October 2013 in European Journal of Pediatrics
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Journal Article
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ONOsamu Nomura
Osamu Nomura
NHNaoya Hashimoto
Naoya Hashimoto
AIAkira Ishiguro
Akira Ishiguro
MMMikiko Miyasaka
Mikiko Miyasaka
SNShunsuke Nosaka
Shunsuke Nosaka
JTJohn Ichiro Takayama
John Ichiro Takayama

15 June 2017 in BMC Medical Education
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Journal Article
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ONOsamu Nomura
Osamu Nomura
Hirotaka OnishiHirotaka Onishi
Hirotaka Onishi
HKHiroyuki Kato
Hiroyuki Kato
Cross-year peer tutoring (CYPT) of medical students is recognized as an effective learning tool. The aim of this study is to investigate the non-inferiority of the objective outcome of medical interview training with CYPT compared with the results of faculty-led training (FLT), and to explore qualitatively the educational benefits of CYPT. We conducted a convergent mixed methods study including a randomized controlled non-inferiority trial and two focus groups. For the CYPT group, teaching was led by six student tutors from year 5. In the FLT group, students were taught by six physicians. Focus groups for student learners (four tutees) and student teachers (six tutors) were conducted following the training session. One hundred sixteen students agreed to participate. The OSCE scores of the CYPT group and FLT group were 91.4 and 91.2, respectively. The difference in the mean score was 0.2 with a 95% CI of −1.8 to 2.2 within the predetermined non-inferiority margin of 3.0. By analyzing the focus groups, we extracted 13 subordinate concepts and formed three categories including ‘Benefits of CYPT’, ‘Reflections of tutees and tutors’ and ‘Comparison with faculty’, which affected the interactions among tutees, tutors, and faculty. CYPT is effective for teaching communication skills to medical students and for enhancing reflective learning among both tutors and tutees.

ONOsamu Nomura
Osamu Nomura
JIJin Irie
Jin Irie
YPYoonsoo Park
Yoonsoo Park
HNHiroshi Nonogi
Hiroshi Nonogi
HHHiroyuki Hanada
Hiroyuki Hanada
(1) Background: This study aimed to evaluate the effectiveness of using a pre-existing video on CPR to support preclinical resuscitation education for medical students; (2) Methods: In total, 129 students selected to learn CPR using a pre-existing YouTube video or the conventional screencast video by their university faculties. All students responded to the pre- and post-training multiple-choice questionnaire on the basic knowledge of CPR, and, based on their responses, an analysis of covariance (ANCOVA) was conducted to assess the comparability of effectiveness across learning modalities. (3) Results: Among the students, 49 (38.0%) students selected the YouTube video to learn about CPR and were treated as the intervention group. The mean pre-test scores and post-test scores of the YouTube and the instructor’s video groups were 6.43 and 6.64, and 9.06 and 9.09, respectively. After controlling for the pre-test score effects, the results of ANCOVA did not show statistically significant differences between groups (p = 0.927), indicating comparable performance between groups that used YouTube and the instructor’s videos. (4) Conclusion: Utilizing YouTube videos is a useful teaching strategy for teaching CPR knowledge, which would reduce the burden on faculty of creating screencast lecture videos for online learning on resuscitation.

6 May 2022 in Emergency Medicine Journal
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TMTakaaki Mori
Takaaki Mori
TITakateru Ihara
Takateru Ihara
ONOsamu Nomura
Osamu Nomura
Background Previous studies have examined the utility of ultrasonography performed by radiologists for diagnosing paediatric testicular torsion. While point-of-care ultrasound (POCUS) is used in paediatric emergency medicine, its diagnostic accuracy is still unknown. Objectives The present systematic review and meta-analysis aimed to clarify the accuracy of POCUS in diagnosing testicular torsion in children. Methods Following the Preferred Reporting Items for Systematic Review and Meta-analysis of Diagnostic Test Accuracy guidelines, a systematic review was performed using the indices of MEDLINE, EMBASE plus EMBASE classics, PubMed and the Cochrane database from inception to November 2020. Any study investigating the diagnostic accuracy of POCUS for paediatric testicular torsion was extracted. The primary outcome was the assessment of the diagnostic accuracy of POCUS for paediatric testicular torsion. The pooled sensitivity and specificity were calculated. Quality analysis was conducted using Quality Assessment of Diagnostic Accuracy Studies-2 (QUADAS-2). Results Four studies enrolling 784 patients in total were included. The pooled sensitivity, specificity, and positive and negative likelihood ratios of POCUS were 98.4% (95% CI: 88.5% to 99.8%), 97.2% (95% CI: 87.2% to 99.4%), 34.7 (95% CI: 7.4 to 164.4) and 0.017 (95% CI: 0.002 to 0.12), respectively. Risk-of-bias assessment using QUADAS-2 revealed that two of the studies had a high risk of bias in patient selection. Conclusion The present systematic review and meta-analysis showed that POCUS had high sensitivity and specificity for identifying testicular torsion in paediatric patients although the risk of bias was high in the studies analysed.

1 March 2019 in The American Journal of Emergency Medicine
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Journal Article
Closed access
TMTakaaki Mori
Takaaki Mori
ONOsamu Nomura
Osamu Nomura
TITakateru Ihara
Takateru Ihara

1 September 2016 in Medicine
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Journal Article
Open access
ONOsamu Nomura
Osamu Nomura
HMHiroki Mishina
Hiroki Mishina
YKYoshinori Kobayashi
Yoshinori Kobayashi
AIAkira Ishiguro
Akira Ishiguro
HSHirokazu Sakai
Hirokazu Sakai
HKHiroyuki Kato
Hiroyuki Kato
Duty hour regulations have been placed in residency programs to address mental health concerns and to improve wellness. Here, we elucidate the prevalence of depressive symptoms after implementing an overnight call shift system and the factors associated with burnout or depression among residents.A sequential exploratory mixed methods study was conducted in a tertiary care pediatric and perinatal hospital in Tokyo, Japan. A total of 41 pediatric residents participated in the cross-sectional survey. We determined and compared the prevalence of depressive symptoms and the number of actual working hours before and after implementing the shift system. A follow-up focus-group interview with 4 residents was conducted to explore the factors that may trigger or prevent depression and burnout.Mean working hours significantly decreased from 75.2 hours to 64.9 hours per week. Prevalence of depressive symptoms remained similar before and after implementation of the shift system. Emotional exhaustion and depersonalization from the burnout scale were markedly associated with depression. High workload, stress intolerance, interpersonal difficulties, and generation gaps regarding work-life balance could cause burnout. Stress tolerance, workload monitoring and balancing, appropriate supervision, and peer support could prevent burnout.Although the overnight call shift system was effective in reducing working hours, its effectiveness in managing mental health issues among pediatric residents remains unclear. Resident wellness programs represent an additional strategy and they should be aimed at fostering peer support and improvement of resident-faculty interactions. Such an approach could be beneficial to the relationship between physicians of different generations with conflicting belief structures.