Curriculum Vitaes

Masatoshi Okumura

  (奥村 将年)

Profile Information

Affiliation
Professor, Department of Quality and Safety in Healthcare, Fujita Health University Hospital
Degree
博士(医学)(Mar, 2021)
修士(理学)(Mar, 2001)

J-GLOBAL ID
201901014788024440
researchmap Member ID
B000367045

Papers

 20
  • Journal of the Japanese Society of Intensive Care Medicine, 33, Mar, 2026  Peer-reviewed
  • Daisuke Kawakami, Shigeki Fujitani, Hidenobu Koga, Hisashi Dote, Mumon Takita, Akihiro Takaba, Masaaki Hino, Michitaka Nakamura, Hiromasa Irie, Tomohiro Adachi, Mami Shibata, Jun Kataoka, Akira Korenaga, Tomoya Yamashita, Tomoya Okazaki, Masatoshi Okumura, Takefumi Tsunemitsu
    Critical care medicine, Jun 23, 2023  
    OBJECTIVES: This study aimed to examine the association between ABCDEF bundles and long-term postintensive care syndrome (PICS)-related outcomes. DESIGN: Secondary analysis of the J-PICS study. SETTING: This study was simultaneously conducted in 14 centers and 16 ICUs in Japan between April 1, 2019, and September 30, 2019. PATIENTS: Adult ICU patients who were expected to be on a ventilator for at least 48 hours. INTERVENTIONS: None. MEASUREMENTS AND MAIN RESULTS: Bundle compliance for the last 24 hours was recorded using a checklist at 8:00 am The bundle compliance rate was defined as the 3-day average of the number of bundles performed each day divided by the total number of bundles. The relationship between the bundle compliance rate and PICS prevalence (defined by the 36-item Short Form Physical Component Scale, Mental Component Scale, and Short Memory Questionnaire) was examined. A total of 191 patients were included in this study. Of these, 33 patients (17.3%) died in-hospital and 48 (25.1%) died within 6 months. Of the 96 patients with 6-month outcome data, 61 patients (63.5%) had PICS and 35 (36.5%) were non-PICS. The total bundle compliance rate was 69.8%; the rate was significantly lower in the 6-month mortality group (66.6% vs 71.6%, p = 0.031). Bundle compliance rates in patients with and without PICS were 71.3% and 69.9%, respectively (p = 0.61). After adjusting for confounding variables, bundle compliance rates were not significantly different in the context of PICS prevalence (p = 0.56). A strong negative correlation between the bundle compliance rate and PICS prevalence (r = -0.84, R2 = 0.71, p = 0.035) was observed in high-volume centers. CONCLUSIONS: The bundle compliance rate was not associated with PICS prevalence. However, 6-month mortality was lower with a higher bundle compliance rate. A trend toward a lower PICS prevalence was associated with higher bundle compliance in high-volume centers.
  • 高林 拓也, 奥村 将年, 森 一直, 牧野 悟士, 田中 千晶, 河村 佑太, 津下 和貴子
    医療の質・安全学会誌, 17(4) 431-437, Oct, 2022  Peer-reviewedCorresponding author
  • Kazunao Mori, Yoko Tsukamoto, Satoshi Makino, Takuya Takabayashi, Masahiro Kurosawa, Wataru Ohashi, Masatoshi Okumura, Yoshihito Fujita, Yoshihiro Fujiwara
    PLOS ONE, 17(1) e0262605-e0262605, Jan 21, 2022  Peer-reviewed
    Nurse practitioners are increasingly now members of intensive care teams in Japan, but no data exist about their effect on the outcomes for critically ill patients. This study aimed to compare the outcomes of postoperative patients on mechanical ventilators before and after the participation of nurse practitioners in intensive care teams. We retrospectively identified 387 patients who underwent postoperative mechanical ventilation at a University Hospital in Japan, using data from medical records from 1 April 2015 to 31 March 2017. We extracted data and compared patients’ length of stay in the intensive care unit and the hospital, mechanical ventilation days, postoperative rehabilitation start date, rehabilitation prescription, intensive care unit and hospital mortality, and intensive care unit readmission. Multiple regression analysis was used to analyze the factors affecting length of stay in the intensive care unit. Patients who received care from nurse practitioners and physicians had significantly shorter stays in intensive care (4.8 ± 4.8 days versus 6.7 ± 10.3 days, <italic>p</italic> &lt; 0.021). Mechanical ventilation days, total length of hospital stay, rehabilitation prescription, mortality in intensive care and hospital, and readmission to intensive care were all similar to those who received care only from physicians. The multiple regression analysis suggests that participation of nurse practitioners in intensive care reduced the length of stay in the unit by 2.6 days (<italic>p</italic> = 0.003). These findings could help to increase use of non-physician healthcare providers in intensive care. Our results demonstrated that it is both effective and safe for nurse practitioners to participate in intensive care teams that provide care for postoperative patients receiving mechanical ventilation.
  • 鏡味 真実, 奥村 将年, 森 一直, 藤田 義人, 藤原 祥裕
    日本救急医学会中部地方会誌, 17 21-25, Dec, 2021  Peer-reviewed
  • Nozomu Shima, Kyohei Miyamoto, Seiya Kato, Takuo Yoshida, Shigehiko Uchino, Tomonao Yoshida, Hiroshi Nashiki, Hajime Suzuki, Hiroshi Takahashi, Yuki Kishihara, Shinya Nagasaki, Tomoya Okazaki, Shinshu Katayama, Masaaki Sakuraya, Takayuki Ogura, Satoki Inoue, Masatoshi Uchida, Yuka Osaki, Akira Kuriyama, Hiromasa Irie, Michihito Kyo, Junichi Saito, Izumi Nakayama, Takahiro Masuda, Yasuyuki Tsujita, Masatoshi Okumura, Haruka Inoue, Yoshitaka Aoki, Takashiro Kondo, Isao Nagata, Takashi Igarashi, Nobuyuki Saito, Masato Nakasone
    Journal of Intensive Care, 9(1) 46-46, Dec, 2021  Peer-reviewed
    <title>Abstract</title><sec> <title>Background</title> Electrical cardioversion (ECV) is widely used to restore sinus rhythm in critically ill adult patients with atrial fibrillation, although its prognostic value is uncertain. This study aims to elucidate the clinical meaning of successful ECV. </sec><sec> <title>Methods</title> This is a sub-analysis of the AFTER-ICU study, a multicenter prospective study with a cohort of 423 adult non-cardiac patients with new-onset atrial fibrillation (AF). Patients that underwent ECV within 7 days after initial onset of AF were included in the sub-analysis. We compared intensive care unit (ICU) and overall hospital mortality, survival time within 30 days, cardiac rhythm at ICU discharge, and the length of ICU and overall hospital stay between patients whose sinus rhythm was restored immediately after the first ECV session (primary success group) and those in whom it was not restored (unsuccessful group). To find the factors related to the primary success of ECV, we also compared patient characteristics, the delivered energy, and pretreatment. </sec><sec> <title>Results</title> Sixty-five patients received ECV and were included in this study. Although 35 patients (54%) had primary success, recurrence of AF occurred in 24 of these patients (69%). At ICU discharge, three patients still had AF in the unsuccessful group, but no patients in the primary success group still had AF. ICU mortality was 34% in the primary success group and 17% in the unsuccessful group (<italic>P</italic> = 0.10). Survival time within 30 days did not differ between the groups. Delivered energy and pretreatment were not associated with primary success of ECV. </sec><sec> <title>Conclusions</title> The primary success rate of ECV for new-onset AF in adult non-cardiac ICU population was low, and even if it succeeded, the subsequent recurrence rate was high. Primary success of ECV did not affect the rate of mortality. Pretreatment and delivered energy were not associated with the primary success of ECV. </sec><sec> <title>Trial registration</title> UMIN clinical trial registry, the Japanese clinical trial registry (registration number: <ext-link xmlns:xlink="http://www.w3.org/1999/xlink" ext-link-type="uri" xlink:href="https://upload.umin.ac.jp/cgi-open-bin/ctr_e/ctr_view.cgi?recptno=R000030333">UMIN000026401</ext-link>, March 31, 2017). </sec>
  • Daisuke Kawakami, Shigeki Fujitani, Takeshi Morimoto, Hisashi Dote, Mumon Takita, Akihiro Takaba, Masaaki Hino, Michitaka Nakamura, Hiromasa Irie, Tomohiro Adachi, Mami Shibata, Jun Kataoka, Akira Korenaga, Tomoya Yamashita, Tomoya Okazaki, Masatoshi Okumura, Takefumi Tsunemitsu
    Critical Care, 25(1) 69-69, Dec, 2021  Peer-reviewed
    <title>Abstract</title><sec> <title>Background</title> Many studies have compared quality of life of post-intensive care syndrome (PICS) patients with age-matched population-based controls. Many studies on PICS used the 36-item Short Form (SF-36) health survey questionnaire version 2, but lack the data for SF-36 values before and after intensive care unit (ICU) admission. Thus, clinically important changes in the parameters of SF-36 are unknown. Therefore, we determined the frequency of co-occurrence of PICS impairments at 6 months after ICU admission. We also evaluated the changes in SF-36 subscales and interpreted the patients’ subjective significance of impairment. </sec><sec> <title>Methods</title> A prospective, multicenter, observational cohort study was conducted in 16 ICUs across 14 hospitals in Japan. Adult ICU patients expected to receive mechanical ventilation for &gt; 48 h were enrolled, and their 6-month outcome was assessed using the questionnaires. PICS definition was based on the physical status, indicated by the change in SF-36 physical component score (PCS) ≥ 10 points; mental status, indicated by the change in SF-36 mental component score (MCS) ≥ 10 points; and cognitive function, indicated by the worsening of Short-Memory Questionnaire (SMQ) score and SMQ score at 6 months &lt; 40. Multivariate logistic regression model was used to identify the factors associated with PICS occurrence. The patients’ subjective significance of physical and mental symptoms was assessed using the 7-scale Global Assessment Rating to evaluate minimal clinically important difference (MCID). </sec><sec> <title>Results</title> Among 192 patients, 48 (25%) died at 6 months. Among the survivors at 6 months, 96 patients responded to the questionnaire; ≥ 1 PICS impairment occurred in 61 (63.5%) patients, and ≥ 2 occurred in 17 (17.8%) patients. Physical, mental, and cognitive impairments occurred in 32.3%, 14.6% and 37.5% patients, respectively. Population with only mandatory education was associated with PICS occurrence (odds ratio: 4.0, 95% CI 1.1–18.8, <italic>P</italic> = 0.029). The MCID of PCS and MCS scores was 6.5 and 8.0, respectively. </sec><sec> <title>Conclusions</title> Among the survivors who received mechanical ventilation, 64% had PICS at 6 months; co-occurrence of PICS impairments occurred in 20%. PICS was associated with population with only mandatory education. Future studies elucidating the MCID of SF-36 scores among ICU patients and standardizing the PICS definition are required. <italic>Trial registration</italic> UMIN000034072. </sec>
  • Masatoshi Okumura, Tomonori Ishigaki, Kazunao Mori, Yoshihiro Fujiwara
    Intensive and Critical Care Nursing, 68 103128-103128, Aug, 2021  Peer-reviewedLead author
    OBJECTIVE: To investigate the relationship between personality traits and critical care nursing competence among critical care nurses. RESEARCH METHODOLOGY/DESIGN: Multicentre cross-sectional survey using a self-report questionnaire and path modelling, from August 2017 to December 2018. SETTING: Six intensive care units in Japan. MAIN OUTCOME MEASURES: We assessed relationships among the Big Five personality traits and four critical care nursing competencies in nurses. FINDINGS: We included 211 nurses (77.7% women, 59.2% in their 20 s); 62.6% had 1-5 years' critical care nursing experience. Among the four competencies, principles of nursing care had a direct positive effect on decision-making (0.77, p < 0.001); decision-making had a direct positive effect on collaboration (0.74, p < 0.001) and nursing interventions (0.77, p < 0.001). The personality traits openness to experience, agreeableness, and extraversion had a significantly positive effect (0.17, p < 0.05; 0.43, p < 0.001; 0.29, p < 0.01; respectively) on principles of nursing care, the key competency. The personality trait neuroticism had a direct or indirect negative effect on all four nursing competencies. CONCLUSION: Nursing competence in the critical care setting is affected by personality traits. Our findings can be applied in nursing education to improve competence based on individual personality traits.
  • Takuo Yoshida, Shigehiko Uchino, Yusuke Sasabuchi, AFTER-ICU study group
    Journal of Critical Care, 59 136-142, Oct, 2020  
    PURPOSE: Epidemiological information is lacking after identification of new-onset atrial fibrillation (AF) in critically ill patients. This study aimed to describe the clinical course after the identification of new-onset AF. MATERIALS AND METHODS: This prospective cohort study enrolled adult patients with new-onset AF in 32 Japanese ICUs during 2017-2018. We collected data on patient comorbidities, physiological information before and at the AF onset, interventions for AF, cardiac rhythm transition, adverse events and in-hospital death and stroke. RESULTS: We included 423 new-onset AF patients. At the AF onset, mean arterial pressure decreased and the heart rate increased. Eighty-four patients (20%) spontaneously restored sinus rhythm and 328 patients (78%) received various pharmacological interventions (rate-control drugs, 67%; rhythm-control drugs, 34%). Anticoagulants were administered in 173 patients (40%) and 13 patients (3%) experienced bleeding complications. Twenty-four patients (6%) were still in AF at 168 h after the onset (sustained AF 4%; recurrent AF 2%). The overall hospital mortality was 26% and the incidence of in-hospital stroke was 4.5%. CONCLUSIONS: Although the proportion of patients with AF continued to decrease with various treatments, these patients had high risk of death. Further research to assess the management of new-onset AF in critically ill patients is warranted.
  • Takuo Yoshida, Shigehiko Uchino, Yusuke Sasabuchi, Yasuhiro Hagiwara, AFTER-ICU study group
    Intensive Care Medicine, 46(1) 27-35, Jan, 2020  
  • Okumura M, Ishigaki T, Mori K, Fujiwara Y
    PloS one, 14(11) e0225668, 2019  Peer-reviewed
    BACKGROUND: Critical care nurses need a high level of medical competence, especially with regard to patient safety. There are several tools to measure general and critical care nursing competence, but the usability of these tools is inadequate because they include large numbers of questions. To maintain quality and safety in intensive care units (ICUs), it is necessary to be able to easily measure and evaluate critical care nursing competence. The purpose of this study was to develop an easy-to-use questionnaire assessing critical care nursing competence related to patient safety. METHODS: A cross-sectional, descriptive, explorative study was designed to collect data from nurses working in six ICUs in tertiary hospitals in Japan. Data were collected from August 2017 to December 2018. The Critical Care Nursing Competence Questionnaire for Patient Safety (C3Q-safety) is a 22-item instrument designed to assess nursing competence related to patient safety in ICUs. Items were developed based on previous work related to critical care nursing competence and were adjusted based on a pilot study. RESULTS: A total of 211 nurses working in ICUs participated in this study. Through descriptive statistics and factor analysis, the number of questions was reduced from 24 to 22. The C3Q-safety had four factors: decision making, collaboration, nursing intervention, and principles of nursing care. Cronbach's alpha ranged from 0.73 to 0.83. The four factors showed positive correlations with each other (0.47 to 0.72). Nurses licensed as certified nurses in intensive care and those with longer ICU work experience showed significantly higher scores on all four factors. CONCLUSIONS: We developed an easy-to-use questionnaire to assess critical care nursing competence related to patient safety. The C3Q-safety was able to detect four areas of competence. The C3Q-safety will make it possible to easily measure critical care nursing competence and can be utilized for efficient education.
  • 奥村将年, 藤谷茂樹
    ICUとCCU, 42(2) 107-115, Mar, 2018  Invited
  • Masatoshi Okumura, Atsushi Ujiro, Yasunori Otsuka, Hiroshi Yamamoto, Sho Wada, Hirofumi Iwata, Toshiaki Kan, Seiji Miyauchi, Atsushi Hashimoto, Yuko Sato, Yoshihito Fujita, Yoshihiro Fujiwara, Hideki Shimaoka
    Acute Medicine & Surgery, 4(3) 344-348, Apr, 2017  Peer-reviewed
  • Atsushi Kuhara, Masatoshi Okumura, Tsubasa Kimata, Yoshinori Tanizawa, Ryo Takano, Koutarou D. Kimura, Hitoshi Inada, Kunihiro Matsumoto, Ikue Mori
    SCIENCE, 320(5877) 803-807, May, 2008  Peer-reviewed
  • Eiji Kodama, Atsushi Kuhara, Akiko Mohri-Shiomi, Koutarou D. Kimura, Masatoshi Okumura, Masahiro Tomioka, Yuichi Iino, Ikue Mori
    GENES & DEVELOPMENT, 20(21) 2955-2960, Nov, 2006  Peer-reviewed
  • Ikue Mori, Masatoshi Okumura, Atsushi Kuhara
    Japanese Journal of Neuropsychopharmacology, 24(4) 239-241, Aug, 2004  Peer-reviewed
  • 奥村 将年, 大河内 善史, 森 郁恵
    蛋白質核酸酵素, 49(3) 444-449, Feb, 2004  
  • Okumura M, Okochi Y, Mori I
    Tanpakushitsu kakusan koso. Protein, nucleic acid, enzyme, 49(3 Suppl) 444-449, Feb, 2004  Peer-reviewed

Misc.

 1

Books and Other Publications

 17

Presentations

 40

Teaching Experience

 4

Research Projects

 1

Social Activities

 3