Kouji Nagata

ORCID: 0000-0002-8933-8889
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About
Contact & Profiles
Research Areas
  • Fluid Dynamics and Turbulent Flows
  • Congenital Diaphragmatic Hernia Studies
  • Neonatal Respiratory Health Research
  • Congenital Anomalies and Fetal Surgery
  • Wind and Air Flow Studies
  • Particle Dynamics in Fluid Flows
  • Aerodynamics and Acoustics in Jet Flows
  • Combustion and flame dynamics
  • Meteorological Phenomena and Simulations
  • Heat Transfer Mechanisms
  • Computational Fluid Dynamics and Aerodynamics
  • Hernia repair and management
  • Congenital Heart Disease Studies
  • Congenital gastrointestinal and neural anomalies
  • Intestinal Malrotation and Obstruction Disorders
  • Oceanographic and Atmospheric Processes
  • Fluid Dynamics and Vibration Analysis
  • Flow Measurement and Analysis
  • Aerodynamics and Fluid Dynamics Research
  • Advanced Sensor Technologies Research
  • Atmospheric and Environmental Gas Dynamics
  • Fluid Dynamics and Mixing
  • Plasma and Flow Control in Aerodynamics
  • Intracranial Aneurysms: Treatment and Complications
  • Pleural and Pulmonary Diseases

Kyushu University
2016-2025

Osaka Women's and Children's Hospital
2022-2023

Nagoya University Hospital
2022-2023

Chiba University
2022-2023

Kanagawa Children's Medical Center
2022-2023

Osaka University
2022-2023

Juntendo University Urayasu Hospital
2023

Sonoda Women's University
2023

Juntendo University
2023

Kyushu University Hospital
2008-2022

<b>Aim of the Study</b> Few follow-up studies focused on recurrence regarding postoperative course congenital diaphragmatic hernia (CDH) survivors. The aim this study was to report risk factor for CDH patients who had during follow-up. <b>Materials and Methods</b> A multicenter retrospective survey conducted neonates diagnosed have between January 2006 December 2010. Follow-up September 2013 October (ethical approval: No. 25–222). Nine institutions agreed participate in survey. Out 228, 182...

10.1055/s-0034-1395486 article EN European Journal of Pediatric Surgery 2014-12-19

Neonates with congenital diaphragmatic hernia often require surgical defect closure a patch. Alternatives to native tissue are critically needed for this paediatric surgery. The clinical efficacy of mesh patches is limited by complications associated residual foreign material and recurrence. In study, we used novel bio-3D printer method generate large scaffold-free composed human cells. resulting constructs had high elasticity strength. Cellular were transplanted into rats surgically created...

10.1016/j.biomaterials.2018.03.012 article EN cc-by-nc-nd Biomaterials 2018-03-09

The effects of molecular diffusivities heat and mass on the counter-gradient scalar momentum transfer in strongly stable stratification are experimentally investigated unsheared sheared stratified water mixing-layer flows downstream turbulence-generating grids. Experiments carried out two kinds stably flows. In case thermal stratification, difference between turbulent fluxes an active (heat with Prandtl number Pr ≈ 6) a passive (mass Schmidt Sc 600) is investigated. salt diffusion (salt)...

10.1017/s0022112096008294 article EN Journal of Fluid Mechanics 1996-11-10

Turbulent mixing of high-Schmidt-number passive scalars in regular and fractal grid turbulence is experimentally investigated using a water channel. A turbulence-generating installed at the entrance test section, which 1.5 m length 0.1 m×0.1 cross section. Two types grids are used: one consisting square-mesh biplane constructions, other square-type grid, was first by Hurst Vassilicos (2007 Phys. Fluids 19 035103) Seoud 105108). The two have same solidity 0.36. Reynolds number based on mesh...

10.1088/0031-8949/2010/t142/014069 article EN Physica Scripta 2010-12-01

Purpose: This study assessed the long-term impact of bile leak complications on pediatric hepatoblastoma (HB) patients post-surgery. With HB predominantly affecting children under five, increased survival rates necessitate a focus post-surgical complications, particularly concerning effects leaks. Methods: A retrospective analysis was conducted treated for at our institution from 1980 to 2022. The diagnosis, operative procedure, mortality, and prognosis were retrospectively analyzed examine...

10.1097/ij9.0000000000000135 article EN International Journal of Surgery Oncology 2025-02-04

Abstract Background Portal cavernoma cholangiopathy (PCC) has recently been recognized as an abnormality of the intrahepatic and extrahepatic bile ducts caused by external compression portal or ischemia in biliary region. Although vein obstruction (EHPVO) is common children with hypertension, association between surgical treatment for EHPVO incidence PCC not well known. Methods We retrospectively reviewed medical records 14 cases childhood‐onset our department. was defined intra‐ duct...

10.1111/ped.70061 article EN Pediatrics International 2025-01-01

Abstract Congenital diaphragmatic hernia (CDH) is a birth defect of the diaphragm in which abdominal organs herniate through into thoracic cavity. The main pathophysiology respiratory distress and persistent pulmonary hypertension because hypoplasia caused by compression elevated organs. Recent progress prenatal diagnosis postnatal care has led to an increase survival rate patients with CDH. However, some survivors experience mid‐ long‐term disabilities complications requiring treatment...

10.1111/ped.14473 article EN Pediatrics International 2021-04-01

Abstract Background To retrospectively investigate the developmental outcomes at 3 years of age in patients with congenital diaphragmatic hernia (CDH) using a multicenter collaborative research approach. Methods We evaluated CDH and no other malformations born between 2010 2016 seven facilities Japanese Research Group. The quotient (DQ) was Kyoto Scale Psychological Development 2001, most standardized scale Japan. Factors associated DQ score &lt; 85 were also analyzed. Results Of 196...

10.1038/s41390-025-03870-z article EN cc-by Pediatric Research 2025-01-23

Treatment modalities for neonates with congenital diaphragmatic hernia (CDH) have greatly improved in recent years, a concomitant increase survival. However, long-term outcomes restrict the identification of optimal care pathways CDH survivors adolescence and adulthood. Therefore, we evaluated within Japanese Study Group (JCDHSG).Participants were born between 2006 2018 according to JCDHSG. Participants enrolled database at 1.5, 3, 6, 12 years old. Follow-up items included complications,...

10.3390/children9060856 article EN cc-by Children 2022-06-08

Abstract An original technique for simultaneous measurements of concentration and velocity in a turbulent liquid flow with without chemical reaction is developed by combining two‐component He‐Ne laser Doppler velocimeter Ar + laserinduced fluorescence technique. The mass flux eddy diffusivity are estimated from the shear‐free mixing layer downstream turbulence grid. results show that present measuring enables us to simultaneously measure high resolutions approximation mean gradient diffusion...

10.1002/aic.690391005 article EN AIChE Journal 1993-10-01
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