Kohta Katayama

ORCID: 0000-0001-8076-7188
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About
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Research Areas
  • Long-Term Effects of COVID-19
  • Urinary Tract Infections Management
  • Innovations in Medical Education
  • Heart Rate Variability and Autonomic Control
  • Urinary Bladder and Prostate Research
  • Hospital Admissions and Outcomes
  • Thyroid Disorders and Treatments
  • Liver Disease Diagnosis and Treatment
  • Cardiovascular Syncope and Autonomic Disorders
  • Cardiovascular Function and Risk Factors
  • COVID-19 and Mental Health
  • Pelvic floor disorders treatments
  • Emergency and Acute Care Studies
  • Workplace Health and Well-being
  • Neurological and metabolic disorders
  • Healthcare professionals’ stress and burnout
  • Infective Endocarditis Diagnosis and Management
  • Healthcare cost, quality, practices
  • Cardiac Imaging and Diagnostics
  • Autopsy Techniques and Outcomes
  • Tracheal and airway disorders
  • Diet and metabolism studies
  • Sleep and Work-Related Fatigue
  • Radiology practices and education
  • Pediatric Urology and Nephrology Studies

St. Marianna University School of Medicine
2022-2025

Fukushima Medical University
2017-2025

University School
2024

Louisiana State University Health Sciences Center Shreveport
2024

Osaka Metropolitan University
2024

Yokohama City University
2024

General Department of Preventive Medicine
2023

International University of Health and Welfare
2021-2022

National Hospital Organization Mito Medical Center
2015-2021

Kurashiki Central Hospital
2017-2021

Abstract Long duty hours (DH) impair sleep and negatively affect residents’ health medical safety. This cross-sectional study investigated the association among DH, duration, insomnia, impairment, depressive symptoms, self-reported errors 5579 residents in Japan who completed General Medicine In-Training Examination (2021) participated training-environment survey. Weekly DH was classified under seven categories. Sleep duration insomnia from Athens Insomnia Scale, were analysed to determine...

10.1038/s41598-024-51353-8 article EN cc-by Scientific Reports 2024-01-17

Abstract Objectives Autopsy plays an essential role in detecting diagnostic errors and the findings from autopsies have potential to reduce future errors. However, there are few reports Japan on based autopsy diagnoses. This study aimed detail Japan. Methods descriptive utilized case report abstract database of Japanese Society Internal Medicine chapter meetings. cases 2002 2022 were included. We defined as discrepancies primary cause death between clinical diagnosis. Diagnostic error also...

10.1515/dx-2025-0013 article EN Diagnosis 2025-04-11

Catheter-associated urinary tract infection is a common and costly problem throughout the world. As limited data from Asia exist regarding prevalence appropriateness of catheters in critically ill patients, we sought to assess both Japan. Using independent observers, evaluated clinical necessity indwelling 7 Japanese intensive care units. Data were collected on 1289 catheter-days 1706 patient days participating units between August 2015 May 2016. Urinary catheter was 76% (range, 49%–94%)....

10.1093/cid/cix018 article EN Clinical Infectious Diseases 2017-03-16

Abstract Background Indwelling urinary catheters are commonly used in hospitalized patients, which can lead to the development of catheter complications, including catheter-associated tract infection (CAUTI). Limited reports on appropriateness use exist Japan. This study investigated prevalence and indwelling catheters, incidence CAUTI non-intensive care unit (non-ICU) wards Japanese hospitals. Methods prospective observational was conducted 7 non-ICU from 6 hospitals Japan October 2017 June...

10.1186/s12879-022-07162-3 article EN cc-by BMC Infectious Diseases 2022-02-21

Objective The relationship between the care of patients with COVID-19 and mental health among resident physicians in Japan is imperative for ensuring appropriate should be clarified. We herein assessed postgraduate year 1 (PGY-1) PGY-2 factors associated health. Design This nationwide cross-sectional study analysed data obtained using clinical training environment self-reported questionnaire. Setting An observational across (PGY-1 PGY-2) from 583 teaching hospitals. Participants Examinees...

10.1136/bmjopen-2022-066348 article EN cc-by-nc BMJ Open 2023-01-01

Coronavirus disease 2019 (COVID-19) sequelae, also known as long COVID, can present with various symptoms. Among these symptoms, autonomic dysregulation, particularly postural orthostatic tachycardia syndrome (POTS), should be evaluated. However, previous studies on the treatment of POTS complicated by COVID-19 are lacking. Therefore, this study aimed to investigate course COVID POTS.

10.1002/jgf2.670 article EN cc-by Journal of General and Family Medicine 2023-12-18

Abstract Empathy is essential for physicians to provide patient-centered care. Nevertheless, the degree which empathy varies among medical residents based on their desired future specialty remains undetermined. This nationwide cross-sectional study compared levels (Jefferson Scale of Empathy, JSE) 824 year one and two postgraduate in Japan by intended specialty, individual characteristics, training working environment characteristics. were with applicants general medicine, emphasizes...

10.1038/s41598-023-41011-w article EN cc-by Scientific Reports 2023-08-23

Tetanus is a potentially fatal infection. Approximately 100 cases are reported in Japan each year; however, little known about its clinical course and outcomes the current era of treatment. We herein report three tetanus elderly patients who survived after mechanical ventilation intensive care. These patients, together with six other similar cases, had median weaning period 31 days length stay 77 days. In severe systemic forms require prolonged hospitalization. To improve prevention,...

10.2169/internalmedicine.55.7131 article EN Internal Medicine 2016-01-01

Mentorship is a dynamic, reciprocal relationship in which an advanced careerist (mentor) encourages the growth of novice (mentee). may protect mental health residents at risk for depression and burnout, yet despite its frequent use known benefits, limited reports exist regarding prevalence effects mentorship on Japan. We conducted cross-sectional study involving postgraduate year 1 2 (PGY-1 PGY-2) Japan who took General Medicine In-Training Examination (GM-ITE) end 2021 academic year. Data...

10.1002/jgf2.671 article EN cc-by-nc-nd Journal of General and Family Medicine 2023-12-18

The effect of E3330 ((2E)-3-[5-(2,3-dimethoxy-6-methyl-1,4-benzoquinoyl)]-2-nonyl-2-++ +propenoic acid), a novel quinone derivative, was studied in the galactosamine-induced hepatitis model F344 rats, which endogenous endotoxin is believed to play critical pathogenetic role. Subcutaneous injection 300 mg/kg galactosamine into rats resulted liver injury. Oral treatment with (10-100 mg/kg) 1 hr after challenge attenuated also effective when administered p.o. 6 or 12 challenge. 1000 more severe...

10.1016/s0022-3565(25)10297-8 article EN Journal of Pharmacology and Experimental Therapeutics 1993-01-01

Abstract We conducted a preintervention–postintervention study to assess the effectiveness of multimodal approach reduce unnecessary urethral catheters in 5 Japanese intensive care units. After intervention catheter point prevalence decreased by 18%, from 79% preintervention 61% postintervention, and appropriateness increased 28%, 57% 85% postintervention.

10.1017/ice.2019.258 article EN Infection Control and Hospital Epidemiology 2019-09-27

A 52-year-old Japanese man with a history of type 2 diabetes mellitus (DM) presented mild dizziness. On admission, the physical examination only revealed tachycardia and right sided cervical lymphadenopathy. fifth day his mental status slightly worsened. Urgent Computed Tomography (CT) head neck multiple abscesses spreading from temporal bone to sternocleidomastoid muscle. Bezold's abscess was diagnosed. Streptococcus pneumoniae isolated middle ear fluid blood cultures. has rarely been...

10.1016/j.idcr.2017.04.006 article EN cc-by-nc-nd IDCases 2017-05-31

10.1016/j.amjmed.2022.02.028 article EN publisher-specific-oa The American Journal of Medicine 2022-03-13

Background: New onset fever is a common symptom among hospitalized patients and it may be manifestation of fatal illnesses such as infection. However, its epidemiology predictors for mortality have not been fully determined in Japanese teaching hospital. Methods: We investigated adult with new elevated temperature 37.5 degrees Celsius or greater the 3rd day after admission during 4-month study period. Only first, single episode per patient was analyzed. causes these fever. also analyzed...

10.14442/general.16.84 article EN General Medicine 2015-01-01

Abstract Purpose Evidence for the pathogenesis and treatment of post-acute coronavirus disease 2019 (COVID-19) (long COVID) is lacking. As long COVID symptoms are predicted to have an impact on global economy, clarification urgently needed. Our experiences indicated that some were complicated by diseases established before COVID-19 pandemic. Methods Using a retrospective, cross-sectional study, we aimed evaluate complicating COVID. medical records patients with confirmed severe acute...

10.21203/rs.3.rs-3963516/v1 preprint EN cc-by Research Square (Research Square) 2024-02-21

Abstract Background The relationship between educational outcomes and the use of web-based clinical knowledge support systems in teaching hospitals remains unknown Japan. A previous study on this topic could have been affected by recall bias because a self-reported questionnaire. Objective We aimed to explore Wolters Kluwer UpToDate system residents’ General Medicine In-Training Examination (GM-ITE) scores. In study, we objectively evaluated total number hospital logs GM-ITE Methods This...

10.2196/52207 article EN cc-by JMIR Medical Education 2024-05-02

Abstract Background Mentorship is a dynamic reciprocal relationship, wherein novice (mentee) grows with the encouragement of an advanced careerist (mentor). It widely implemented in medical training programs. However, there are few reports on mentorship's educational effects Japanese context. This study investigated association between mentorship and in‐training examination scores during clinical residency program Japan. Methods A cross‐sectional was conducted Japan, involving first second...

10.1002/jgf2.703 article EN cc-by-nc-nd Journal of General and Family Medicine 2024-05-10

An 85-year-old woman with diabetes mellitus was admitted to our hospital due progressive dyspnea. Two months previously, pioglitazone had been newly prescribed for management. Bilateral ground-glass opacities and respiratory deterioration suggested failure a drug-induced lung injury. With discontinuation of the administration corticosteroid, an improvement in her condition achieved, although sequelae remained some areas lungs. Results lymphocyte stimulation tests were positive pioglitazone....

10.2169/internalmedicine.55.6330 article EN Internal Medicine 2016-01-01

Abstract Background Evidence for the pathogenesis and treatment of postacute coronavirus disease 2019 (COVID‐19) (long COVID) is lacking. As long COVID symptoms are predicted to have an impact on global economy, clarification urgently needed. Our experiences indicated that some were complicated by diseases established before COVID‐19 pandemic. Methods Using a retrospective, cross‐sectional study, we aimed evaluate complicating COVID. medical records patients with confirmed exhibiting...

10.1002/jgf2.716 article EN cc-by-nc Journal of General and Family Medicine 2024-07-08

A woman in her 80s presented to our clinic with anaemia. Her medical history and medications were unremarkable. She had no of alcohol consumption. a balanced diet. Vital signs normal limits. tongue was highly atrophic appeared red smooth ([figure 1][1]). No

10.1136/bcr-2022-251810 article EN BMJ Case Reports 2022-08-01
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