Kyushu University Academic Staff Educational and Research Activities Database
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Yasuyuki Fujita Last modified date:2021.05.21



Graduate School


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Homepage
https://kyushu-u.pure.elsevier.com/en/persons/yasuyuki-fujita
 Reseacher Profiling Tool Kyushu University Pure
Phone
092-642-5394
Academic Degree
PhD
Country of degree conferring institution (Overseas)
Yes
Field of Specialization
Maternal & Fetal Medicine
Total Priod of education and research career in the foreign country
02years00months
Research
Research Interests
  • Clinical use for elastography of placenta.
    keyword : Elastography、shear wave
    2013.05.
  • Evaluation of fetal circulation using medical engineering equipments
    A new method for measurement of placental elasticity using acoustic radiation force impulse imaging
    keyword : Aortic pulse waveforms, fetal systolic time interval, acoustic radiation force impulse imaging
    1999.04.
Academic Activities
Papers
1. Fujita, Yasuyuki; Nakanishi, Takako Ohmaru; Sugitani, Maiko; Kato, Kiyoko , PLACENTAL ELASTICITY AS A NEW NON-INVASIVE PREDICTIVE MARKER OF PRE-ECLAMPSIA, ULTRASOUND IN MEDICINE AND BIOLOGY, 10.1016/j.ultrasmedbio.2018.09.007, 45, 1, 93-97, 2019.01.
2. Fujita Y, Kiyokoba R, Yumoto Y, Kato K., Max dD/Dt: A Novel Parameter to Assess Fetal Cardiac Contractility and a Substitute for Max dP/Dt, ULTRASOUND IN MEDICINE AND BIOLOGY, 10.1016/j.ultrasmedbio.2018.02.001., 44, 7, 1433-1438, 2018.07.
3. Ohmaru, Takako; Fujita, Yasuyuki; Sugitani, Maiko; Shimokawa, Mototsugu; Fukushima, Kotaro; Kato, Kiyoko, Placental elasticity evaluation using virtual touch tissue quantification during pregnancy, PLACENTA, 10.1016/j.placenta.2015.06.008, 36, 8, 915-920, 2015.08.
4. Ohmaru, Takako; Fujita, Yasuyuki; Sugitani, Maiko; Shimokawa, Mototsugu; Fukushima, Kotaro; Kato, Kiyoko, Placental elasticity evaluation using virtual touch tissue quantification during pregnancy, PLACENTA, 10.1016/j.placenta.2015.06.008, 36, 8, 915-920, 2015.08.
5. Ohmaru Takako, Yasuyuki Fujita, Maiko Sugitani, 下川 元継, Kotaro Fukushima, Kiyoko Kato, Placental elasticity evaluation using virtual touch tissue quantification during pregnancy, Placenta, 10.1016/j.placenta.2015.06.008, 36, 8, 915-920, 2015.08.
6. Tomonobu Uozumi, Yasuyuki Fujita, Kiyomi Tsukimori, Naoki Fusazaki, Makoto Nishibatake, Kiyoko Kato, Prenatal ultrasonographic diagnosis of Uhl anomaly, Case Reports in Perinatal Medicine, 1-4, 2014.07.
7. Tomoka Jimbo, Yasuyuki Fujita, YASUO YUMOTO, Kotaro Fukushima, Kiyoko Kato, Rare fetal complications associated with placental mesenchymal dysplasia: A report of two cases, The Journal of Obstetrics and Gynaecology Research, 41, 2, 304-308, 2014.06.
8. Maiko Sugitani, Yasuyuki Fujita, YASUO YUMOTO, Kotaro Fukushima, Tadahisa Takeuchi, 下川 元継, Kiyoko Kato, A new method for measurement of placental elasticity: Acoustic radiation force impulse imaging, Placenta, 34, 1009-1013, 2013.10.
9. Keiko Kawamura, Yasuyuki Fujita, Kotaro Fukushima, Kiyoko Kato, Rare sonographic finding of osteogenesis imperfecta type 2: Fluid retention in the subarachnoid space, Journal of Medical Ultrasonics , 10.1007/s10396-013-0436-5, 40, 4, 459-461, 2013.10.
10. Yasuyuki Fujita, Shoji Satoh, Maiko Sugitani, YASUO YUMOTO, Kotaro Fukushima, Norio Wake, Clinical utility of augmentation index as a new parameter of peripheral circulation in human fetuses, Early Human Development, 10.1016/j.earlhumdev.2013.03.004. Epub 2013 Apr 3., 89, 8, 601-605, 2013.08, BACKGROUND: Augmentation index (AI) is calculated from the central arterial pressure or pulse waveform and known as a parameter to evaluate arterial vascular function in adults. Patients with deterioration of peripheral circulation will demonstrate increased AI values as well as those with cardiovascular risks. It is because increased AI is caused by the early timing of the reflection wave from the periphery. On the other hand, in fetuses, although arterial pressure waveforms are not available, pulse waveforms of fetal descending aorta are recordable by using an echo-tracking system. Therefore in this study we aimed to evaluate the utility of fetal AI calculated from aortic pulse waveforms for detecting the altered peripheral circulation in human fetuses.

STUDY DESIGN: Fetal AI was calculated from pulse waveforms in the descending aorta using an echo-tracking system. In a cross-sectional study of 105 normal fetuses, the reference range was constructed using linear regression analysis. Retrospectively, 36 growth-restricted fetuses were divided into 2 subgroups, normal (n=21) and increased AIx (n=15), based on the 90th percentile value of normal fetuses. Clinical parameters were compared using Fisher's exact test or Mann-Whitney U test.

RESULTS: Fetal AI decreased linearly with advancing gestational age (r(2)=0.820). The incidences of umbilical artery absent/reversed end-diastolic flow, brain-sparing effect, and oligohydramnios were significantly higher in the increased AI group than the normal AI group.

CONCLUSION: Fetal AI has a possibility to detect deteriorated peripheral circulation in the fetal body as well as fetoplacental circulation..
11. Yuka Sato, Yasuyuki Fujita, Ai Anami, YASUO YUMOTO, Kotaro Fukushima, Norio Wake, Doppler sonographic evaluation of arteriovenous shunt flow in a fetus with dural sinus malformation., The Journal of Obstetrics and Gynaecology Research, 10.1016/j.earlhumdev.2013.03.004., 39, 5, 1081-1084, 2013.05.
12. Atsuhiko Sakai, Yasuyuki Fujita, YASUO YUMOTO, Kotaro Fukushima, Hiroaki Kobayashi, Norio Wake, Successful management of cervico-isthmic pregnancy delivered at term, The Journal of Obstetrics and Gynaecology Research, 10.1111/j.1447-0756.2012.01967.x. , 39, 1, 371-374, 2013.01.
13. Fujita Y, Athayde N, Tokunaga S, Trudinger B, Measurement of cardiac contractility using fetal isovolumetric contraction time in fetal tachyarrhythmia
, Ultrasound Med Biol, 2011.01.
14. Fujita Y, Satoh S, Koga T, Mori A, Nakano H., Aortic pulse waveforms for evaluating cardiac performance in the human fetus., Ultrasound Med Biol., 10.1016/S0301-5629(02)00609-9, 28, 10, 1245-1250, 28(10):1245-50.
, 2002.10.
Presentations
1. Takako Ohmaru, Yasuyuki Fujita, Maiko Sugitani, Kotaro Fukushima, Kiyoko Kato, Analysis of placental elasticity using Virtual Touch Tissue Quantification during pregnancy., IFPA (International Federation of Placenta Associations) Meeting 2014, 2014.09.
2. Yasuyuki Fujita, Hiroko Yoshida, Saki Kido, Arisa Fujiwara, Nobuhiro Hidaka, YASUO YUMOTO, Kotaro Fukushima, Kiyoko Kato, A case of cervico-isthmic pregnancy without placenta previa; the importance of the 1st trimester sonography for the diagnosis, 第66回日本産科婦人科学会 International Session, 2014.04.
Membership in Academic Society
  • Japan Society of Gynecologic Oncology
  • Japan Society of Obstetrics and Gynecology
  • The Japan Society of Ultrasonics in Japan