Kyushu University Academic Staff Educational and Research Activities Database
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Masayuki Ochiai Last modified date:2023.11.22

Post-doctoral Fellow / Department of Pediatrics

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Academic Degree
M.D., Ph.D.
Country of degree conferring institution (Overseas)
Field of Specialization
Pediatrics, Neonatology, Clinical genetics
ORCID(Open Researcher and Contributor ID)
Total Priod of education and research career in the foreign country
Outline Activities
Medical examination of pediatrics
Clinical research of pediatrics and neonatal medicine
Clinical management of perinatal care center
Education for clinical research fellows
Pediatric home care medicine
Clinical genetic counseling
Research Interests
  • Establishment of the Medical Algorithm for Management of Neonatal and Pediatric Onset Idiopathic Thromboembolism
    keyword : Neonatal medicine, Pediatric Medicine, Transitional Medicine, Genetics, Thromboembolism
  • An establishment of treatment algorism for the neonatal-onset idiopathic thrombosis
    keyword : Neonatal medicine, Genetics, Thromboembolism
  • Development of noninvasive monitoring method using transcutaneous blood gas analysis
    keyword : monitoring respiration
  • Etiology of hyperferritineia in very low birth weight infants
    keyword : Neonate、NICU、Blood transfusion、Oxygen injury、Susceptibility to infection
  • Investigation of severity factors of neonatal broncopulmonary dysplasia and these inflammatory specific therapeutic strategy
    keyword : neonatal medicine, respiratory
  • Analysis of vitamin K deficiency due to newborn digestive tract allergy
    keyword : neonatal medicine, immunology, nutrition
  • Kyushu University clincal research network of the high-risk infants
    keyword : neonatal medicine multicenter research network
  • Surveillance of predicable factors with feto-maternal immunothorombocytopenia and icterus praecox
    keyword : feto-maternal immunity, thrombocytopenia, hemolysis, jaundice
  • Kyushu University clincal research network of the high-risk infants
    keyword : neonatal medicine multicenter research network
  • Development of a new assessment system in the perinatal-neonatal medicine
    keyword : perinatal neonatal medicine
  • Gene repair using an adeno, adeno-associate virus vector
    keyword : gene therapy
Academic Activities
1. 落合 正行, Blood Reference Intervals for Preterm Low-Birth-Weight Infants: A Multicenter Cohort Study in Japan., PLoS One, 2016.08.
2. Masayuki Ochiai, BTK gene targeting by homologous recombination using a helper-dependent adenovirus/adeno-associated virus hybrid vector., Gene Ther., 2016.04.
3. Masayuki Ochiai, Longitudinal study of very low birth weight infants until 9years of age; attention deficit hyperactivity and autistic features are correlated with their cognitive functions., Early Hum Dev., 2015.12.
4. Masayuki Ochiai, Survival and Neurodevelopmental Outcome of Preterm Infants Born at 22-24 Weeks of Gestational Age, NEONATOLOGY, 10.1159/000355818, 105, 2, 79-84, 2013.11, Background: The limits of viability in extremely premature infants are challenging for any neonatologists in developed countries. On the other hand, tThe neurological development and growth of extremely preterm infants have come to be the emerging issue in the next stage of following the management of in NICU.
Objective: To assess potential associations between changes in practice and survival/neurodevelopmental outcome, and clinical outcomes of extremely preterm infants born at the limit of viability were studied in a tertiary center.  
Study design: A retrospective study enrolled 51 infants who had no congenital disorders, and were born at 22-24 weeks of gestational age (GA) in 2000-2009 in our single institution. Clinical variables and interventions were studied with regard to one-year survival and developmental quotient (DQ) at 3 years of age.  
Results: The one-year survival rate of 24 preterm infants born in 2005-2009 (79%) was higher than that of the 27 those infants born in 2000-2004 (52%) (p=0.04). The iInfants born at or post-2005 underwent less and more frequently tocolysis (54% vs. 94%, p50 at 3-years of age between pre-20045 (n=9/13=69%) and post-2005 groups (n=10/17=59%) (30% vs. 33%). Multivariate analysis indicated that extremely premature birth ity born at GA50 in survivors.  
Conclusions: The perinatal care after 2005 could improved the overall survival rate, but not, the neurological outcomes of preterm survivors at the limit of viability. Neurodevelopmental impairments were associated with the extremely premature birth ity born at GA.
1. Ochiai M、Ichiyama M、Ishimura M、Hotta T、Uchiumi T、Ishiguro A、Nishikubo T、Shima M、Suenobu T、Osamu O、Kang D、Ohga S, Next-generation diagnostic strategy for pediatric-onset heritable thrombophilia in Japan, The 8th East Asia Hemophilia Forum, 2019.02.
2. Ochiai M, Invited Science Session; Extremely Prematurity Outcomes: Survival and Neurodevelopment Survival and neurodevelopmental outcome of extremely low birth weight infants, Annual Meeting of the Pediatric Academic Societies 2018, 2018.02.
3. 落合 正行, An Elevation of Serum Ferritin Level Might Increase Clinical Risk for the Persistence of Patent Ductus Arteriosus, Sepsis, and Bronchopulmonary Dysplasia in Erythropoietin-Treated Very Low Birth Weight Infants, Asian Society for Pediatric Research, 2017.11.
4. 落合 正行, Hyperferritinemia as a clinical risk factor of sepsis or bronchopulmonary dysplasia in very low birth weight infants, THE NEONATE, an International Symposium for Asia, 2017.03.
5. 落合 正行, Blood Reference Intervals for Preterm Low Birth Weight Infants: Multicenter Cohort Study in Japan, THE NEONATE, an International Symposium for Asia, 2017.03.
6. 落合 正行, Survival and neurodevelopmental outcome of preterm infants born at 22-24 weeks of gestational age, The 25th Fukuoka International Symposium on Perinatal/Maternal Medicine, 2014.08.
7. 落合 正行, Blood chemistry and hematology reference intervals in preterm or low birth weight infants at birth, PAS and ASPR Joint Meeting 2014 May 3-6, 2014 Vancouver, 2014.05.
Membership in Academic Society
  • The Japanese Society on Thrombosis and Homeostasis
  • The Japanese Society of Child Neurology
  • The Japan Society of Obstetrical, Gynecological and Neonatal Hematology
  • The Japan Society of Human Genetics
  • Japan Society for Neonatal Health and Development
  • Japan Society of Perinatal and Neonatal Medicine
  • Japan pediatric society
Educational Activities
Clincal education for medical students
Clinical reseach education for graduate students and clinical fellows
Other Educational Activities
  • 2016.04.