Faculty Profiles - HANZAWA Kazuhiko

MISC - HANZAWA Kazuhiko

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解離性大動脈瘤血行動態モデリングの試み

盛田良介, 山家智之, 白石泰之, 榛沢和彦, Qian Yi, Narracott Andrew, 井上雄介, 山田昭博, 岩元直樹, 舘崎祐馬

生体医工学 57 ( 0 ) S220_2 - S220_2 2019

Language：Japanese Publisher：公益社団法人日本生体医工学会

【背景】解離性大動脈瘤では解離偽腔内に流入する血流がもたらす乱流による複雑な圧流量特性が観察される。治療効果と安全性を評価する上では血管内治療用の解離性大動脈瘤内の血圧血流速の医工学的モデリングが重要となっている。【目的】これまで解離性大動脈瘤の動物実験モデルを作成し血行動態の再現を行ってきた。本研究では動物実験から得られた超音波画像を基に解離性大動脈瘤血行動態のモデリングを目的としてそれらの解析手法に関して評価を進めた。【方法】〔動物解離モデル〕健常成山羊を麻酔下にて開胸し、下行大動脈の中枢側外膜を切開後、中膜を外科的に剥離し、血管開口部を切開し大動脈解離を作成した。〔モデル化手法・解析〕下行大動脈の超音波短軸像を血管長軸に沿って1mm毎の断層像とし、データの数値的再構成により形状モデルを構築した。作成したモデルを用いて模擬循環回路による流れ可視化と数値流体解析を行った。【まとめ】動物モデルでは臨床に近い形態と血流を再現できる一方、血管内治療の血行力学的評価については血流形態の差や計測誤差の課題がある。解離性大動脈瘤治療ではさまざまな医工学モデリング方法論で安全性評価が可能である。

DOI： 10.11239/jsmbe.Annual57.S220_2

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遠位弓部大動脈瘤に対する開窓型ステントグラフトを用いたTEVARの中期成績

岡本竹司, 横井良彦, 榎本貴士, 大西遼, 大久保由華, 中村制士, 長澤綾子, 三島健人, 白石修一, 榛澤和彦, 土田正則

日本胸部外科学会定期学術集会(Web) 72nd 2019

Diabetes care providers’ manual for disaster diabetes care

Jo Satoh, Koichi Yokono, Rie Ando, Toshinari Asakura, Kazuhiko Hanzawa, Yasushi Ishigaki, Takashi Kadowaki, Masato Kasuga, Hideki Katagiri, Yasuhisa Kato, Koreyuki Kurosawa, Masanobu Miura, Jiro Nakamura, Koichi Nishitsuka, Susumu Ogawa, Tomoko Okamoto, Sadanori Sakuma, Shigeru Sakurai, Hiroaki Satoh, Hidetoshi Shimauchi, Hiroaki Shimokawa, Wataru Shoji, Takashi Sugiyama, Akira Suwabe, Masahiro Tachi, Kazuma Takahashi, Susumu Takahashi, Yasuo Terayama, Hiroaki Tomita, Yoko Tsuchiya, Hironori Waki, Tsuyoshi Watanabe, Kazuaki Yahata, Hidetoshi Yamashita

Diabetology International 10 ( 4 ) 1118 - 1142 2019

Risk factors and prevalence of deep vein thrombosis after the 2016 kumamoto earthquakes

Koji Sato, Kenji Sakamoto, Yoichiro Hashimoto, Kazuhiko Hanzawa, Daisuke Sueta, Sunao Kojima, Masaya Fukuda, Hiroki Usuku, Fumie Kihara, Hiroshi Hosokawa, Yohei Nagai, Makoto Nakajima, Yoshiharu Saito, Kayoko Sakai, Sumio Masunaga, Shinji Tanaka, Kazuteru Fujimoto, Kenji Morihisa, Katsuo Noda, Kazuhiro Nishigami, Kohei Nagata, Koichiro Fujisue, Noriaki Tabata, Yukio Ando, Kenichi Tsujita, Hisao Ogawa, Seiji Hokimoto

Circulation Journal 83 ( 6 ) 1342 - 1348 2019

Surgical Treatment for Kommerell's Diverticulum Associated with a Right-Sided Aortic Arch and an Aberrant Left Subclavian Artery: Endovascular or Hybrid

Atsushi Morishita, Hideyuki Tomioka, Seiichiro Katahira, Takeshi Hoshino, Kazuhiko Hanzawa

ANNALS OF VASCULAR DISEASES 12 ( 2 ) 228 - 232 2019

消防 : 避難所のあり方、海外との比較 (特集自然災害と避難所)

榛沢和彦

消防防災の科学 ( 135 ) 7 - 12 2019

Relationship between high intensity transient signals at common carotid artery by paste type probe and cerebro-cardiovascular disease in the residents in the area of Chu-etsu Oki Earthquake

HANZAWA Kazuhiko, IKURA Maiko, OKAMOTO Takeshi, OKUBO Yuka, TSUCHIDA Masanori, NAKAJIMA Takashi, SHINADA Kyoko, OKAMURA Osamu

Neurosonology 32 ( 2 ) 46 - 52 2019

Language：Japanese Publisher：The Japan Academy of Neurosonology

Purpose: We attempted to detect high intensity transient signals (HITS) at common carotid artery (carotid HITS) by paste type Doppler probe in residents at Kashiwazaki City where big earthquake occurred in 2008. Calf deep venous thrombosis (DVT) has been detected frequently in the residents due to earthquake. It was examined whether it relates to DVT, cerebro-cardiovascular diseases (CCVDs), etc. Subjects and Methods: We conducted screening for 522 residents in Kashiwazaki City in 2016–2017. HITS were detected by using 2.0MHz paste type probe at carotid artery for 5min. Results: Carotid HITS was detected in 39 (7.5%). Statistically significant risk factors in the carotid HITS positive group were arterial velocity pulse index (AVI), CCVDs and atrial fibrillation. Univariate analysis of cerebro-cardiovascular disease indicated an odds ratio of 3.8 (95% CI: 1.8–7.9, p = 0.001) in the carotid HITS positive, and furthermore odds ratio 3.6 (95% CI: 1.6–7.9, p = 0.001) was found in the same group in multivariate analysis. Conclusion: Carotid HITS was a significant risk factor for CCVDs and atrial fibrillation in the general population. Therefore, it was suggested that detection of HITS at carotid artery by paste type probe may be useful for prevention of embolic disease.

DOI： 10.2301/neurosonology.32.46

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大動脈解離におけるステントによる偽腔縮小の効果:動物実験とコンピューター流体シミュレーション

榛沢和彦, 大久保由華, 岡本竹司, 青木賢治, 長澤綾子, 三島健人, 土田正則, 近藤俊一

日本胸部外科学会定期学術集会(Web) 72nd 2019

Ultrasound cardiography examinations detect victims' long-term realized and potential consequences after major disasters: A case-control study International journal

Hidenori Onishi, Osamu Yamamura, Shinsaku Ueda, Muneichi Shibata, Soichi Enomoto, Fumie Maeda, Hiromasa Tsubouchi, Takeshi Hirobe, Sadao Shimizu, Kazuhiko Hanzawa, Tadanori Hamano, Yasunari Nakamoto, Hiroyuki Hayashi, Hidekazu Terasawa

Environmental Health and Preventive Medicine 23 ( 1 ) 37 - 37 2018.8

下大静脈腫瘍塞栓を伴う腎細胞癌に対する手術症例の検討

名村理, 仲村亮宏, 鈴木脩平, 大西遼, 中村制士, 長澤綾子, 岡本竹司, 青木賢治, 榛澤和彦, 土田正則

日本血管外科学会雑誌 27 ( Suppl. ) O24 - 3 2018.6

Venous Thromboembolism Caused by Spending a Night in a Vehicle After an Earthquake (Night in a Vehicle After the 2016 Kumamoto Earthquake) International journal

Daisuke Sueta, Seiji Hokimoto, Yoichiro Hashimoto, Kenji Sakamoto, Hiroshi Hosokawa, Kazuhiro Nishigami, Koji Sato, Koichiro Fujisue, Sunao Kojima, Takeshi Takahashi, Kazuhiko Hanzawa, Hisao Ogawa, Kenichi Tsujita

Canadian Journal of Cardiology 34 ( 6 ) 813.e9 - 813.e10 2018.6