Search Results 1-20 of 36

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  • 高分子製心臓代用弁の弁葉形態変化の高速度解析  [in Japanese]

    IWAMOTO NAOKI , 山岸 正明 , 山家 智之 , 白石 泰之 , 盛田 良介 , 舘崎 祐馬 , 軽部 雅人 , 山田 昭博 , 井上 雄介 , Narracott Andrew , John Fenner

    … と比べても長期の臨床成績に優れることが示され,血栓形成や石灰化の問題が少ないとされる.この弁設計の基本仕様は,生体肺動脈の形状を模擬した三葉のfan-shaped弁と血管のValsalva形状を模擬するbulging sinusをもつことである.現在,弁葉設計指標と弁葉挙動を解析し評価系としての検討をしている.本研究の目的は,弁通流量と弁葉の厚みが及ぼす弁葉挙動の検討を行うことである.『方法』光造形で弁葉 …

    Transactions of Japanese Society for Medical and Biological Engineering Annual57(Abstract), S168_2-S168_2, 2019

    J-STAGE 

  • Influence of the bulging sinus of the ePTFE valve on the valve opening and closing:live size model result3  [in Japanese]

    AKUTSU Toshinosuke , TUCHIYA Ryuuichi , KOTOBUKI Syunnsuke

    The Proceedings of the Bioengineering Conference Annual Meeting of BED/JSME 2017.29(0), 1B23, 2017

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  • Development of Valve Test System for Evaluating the Pulmonary Trileaflet Motion  [in Japanese]

    Tsuboko Yusuke , Shiraishi Yasuyuki , Yambe Tomoyuki

    … ePTFE弁は、扇状のePTFE製弁葉と、同じくePTFE製導管から構成され、弁基部の導管壁面には生体のValsalva洞の構造を模したbulging sinusが設けられている。 …

    Transactions of Japanese Society for Medical and Biological Engineering 55Annual(3PM-Abstract), 233-233, 2017

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  • Pediatric Patient with anaerobic Bacterial Meningitis Who was Infected through a Spinal Congenital Dermal Sinus Route  [in Japanese]

    Hideyuki OKUI , FUKASAWA Chie , TOKUTAKE Shoko , TAKEI Haruka , SATO Junichi , HOSHINO Tadashi

    … <p>We report the case of a pediatric patient in whom a spinal congenital dermal sinus was detected after the onset of anaerobic bacterial meningitis. … On admission, he presented with a convulsive status and a bulging anterior fontanel. … A sacral dimple was noted on his lower back, and an MRI showed a spinal congenital dermal sinus. … Antimicrobial therapy, cranial subdural aspiration, dermal sinus excision, and drainage were performed. …

    Kansenshogaku Zasshi 90(3), 321-324, 2016

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  • Hemodynamic examination for shape optimization of ePTFE valved conduit with bulging sinuses  [in Japanese]

    Tsuboko Yusuke , Shiraishi Yasuyuki , Miura Hidekazu , Inoue Yusuke , Yamada Akihiro , Taira Yasunori , Ikeda Jumpei , Yamagishi Masaaki , Yambe Tomoyuki

    … <p>先天性心疾患での肺動脈狭窄に用いられるePTFE製肺動脈弁付導管の形状最適化をすすめている.本研究では,導管壁面にもたせた生体肺動脈基部のバルサルバ洞様のbulging sinusに着目し,その最適形状決定を目的として模擬循環での血行力学評価を行った.</p><p> …

    Transactions of Japanese Society for Medical and Biological Engineering 54Annual(26AM-Abstract), S54-S54, 2016

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  • 1A15 Influence of the Bulging sinus and leaflet shape of the ePTFE valve conduit used for Right Ventricular Outflow Track reconstruction on the flow field of the valve conduit : Valve opening area analysis using live size models  [in Japanese]

    AKUTSU Toshinosuke , KAKIZAWA Akira

    Bulging sinus of the ePTFE valve seem to have favorable effect on hemodynamic performance, however, fluid mechanical research proving this effect has been limited. … This a part of the continuing effort to study the effect of the bulging sinus size of the ePTFE valve on the valve opening area and flow phenomenon inside the conduit. … Three valve conduit models with different bulging sinus sizes were used. …

    The Proceedings of the Bioengineering Conference Annual Meeting of BED/JSME 2016.28(0), _1A15-1_-_1A15-3_, 2016

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  • Influence of the Bulging sinus of the ePTFE valve conduit used for Right Ventricular Outflow Track Reconstruction on the flow field and opening area of the valve conduit  [in Japanese]

    阿久津 敏乃介 , 奥山 晃一

    小児の発症率が多い肺動脈狭窄症においては,個々の治療の困難さなどから現在では有効な治療法として,生体の血管・弁を人工物に置換する再建術がおこなわれている.現在,この再建術に使用されている代替肺動脈には2種類あり,その内,ePTFE(延伸ポリテトラフルオロエチレン)が臨床的に良好な成績を挙げており,特に,バルサルバ洞的なふくらみの有効性が示唆されている.また,弁葉先端の形状においても,丸みをつけたも …

    研究報告 = Journal of technological researches 58(105), 1-6, 2015-03

    IR 

  • Preliminary Study on Mathematical Modeling for the Shape Design of Expanded Polytetrafluoroethylene Pulmonary Valved Conduit

    Tsuboko Yusuke , Shiraishi Yasuyuki , Suzuki Ichiro , Yamada Akihiro , Miura Hidekazu , Yamagishi Masaaki , Yambe Tomoyuki

    … The special features of the ePTFE valve are as follows: (a) anatomically identical trileaflet structure, and (b) bulging sinuses in the vicinity of leaflets. … an ePTFE valve with bulging sinuses, an ePTFE valve in straight conduit, and a natural pulmonary arterial valve extracted from a goat after the animal experiment. … The results suggest that the ePTFE valve with bulging sinuses may exhibit similar parametric characteristics to those calculated from the natural pulmonary heart valves. …

    Advanced Biomedical Engineering 4(0), 144-150, 2015

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  • 2F43 Influence of the Bulging sinus and leaflet shape of the ePTFE valve conduit used for Right Ventricular Outflow Track reconstruction on the flow field of the valve conduit : Flow field analysis using PIV method  [in Japanese]

    AKUTSU Toshinosuke , OKUYAMA Kouichi

    The Proceedings of the Bioengineering Conference Annual Meeting of BED/JSME 2015.27(0), 545-546, 2015

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  • Influence of the aortic bulging on valve opening and closing behavior  [in Japanese]

    阿久津 敏乃介 , 大貫 達也 , 奥山 晃一

    … ePTFE valve, used for the Right Ventricular Outflow Tract (RVOT) reconstruction with good clinical record, has bulging sinus like sinus of valsalva of aorta. …

    研究報告 = Journal of technological researches 57(1), 1-5, 2013-10

    IR 

  • 2C01 Influence of the Sinus of Valsalva like bulging on the valve closure  [in Japanese]

    AKUTSU Toshinosuke

    The Proceedings of the Bioengineering Conference Annual Meeting of BED/JSME 2013.25(0), 313-314, 2013

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  • Influence of the Sinus of Valsalva on Aortic Valve Closure  [in Japanese]

    阿久津 敏乃介 , 鴨下 幸広 , 奥山 晃一 [他] , 髙田 政宏

    … ePTFE valve showed good clinical record, however, no direct fluid mechanical research has been conducted.This paper aims to study the effect of the bulging sinus of the ePTFE valve on a flow phenomenon inside the conduit. … As a first step, similar shaped aorta is utilized to see the effect of bulging sinus on the flow field inside the conduit. … Two aortas with and without bulging sinus were constructed. …

    関東学院大学工学部研究報告 = Journal of technological researches 56(1), 13-19, 2012-10

    IR 

  • Engineering analysis of the effects of bulging sinus in a newly designed paediatric pulmonary heart valve on hemodynamic function  [in Japanese]

    SUZUKI Ichiro , YABE Shota , MATSUE Ken , SUGAI Telma Keiko , TSUBOKO Yusuke , SAIJO Yoshifumi , YOSHIZAWA Makoto , KAMEYAMA Takeyoshi , SHIRAISHI Yasuyuki , YAMBE Tomoyuki , FENG Zhonggang , OKAMOTO Yoshihiro , TANAKA Takashi , UMEZU Mitsuo , MIYAZAKI Takako , YAMAGISHI Masaaki

    人工臓器 41(1), 59-61, 2012-06-15

    Ichushi Web  References (2)

  • 低圧系拍動流循環でのエネルギー損失低減のための Bulging sinus の意義  [in Japanese]

    MATSUO Satoshi , SHIRAISHI Yasuyuki , AKIYAMA Masatoshi , YAMBE Tomoyuki , SAIKI Yoshikatsu

    人工臓器 41(1), 55-56, 2012-06-15

    References (2)

  • Engineering analysis of the effects of bulging sinuses in a newly designed pediatric pulmonary heart valve on hemodynamic function

    SUZUKI Ichiro , SHIRAISHI Yasuyuki , YABE Shota , TSUBOKO Yusuke , SUGAI Telma Keiko , MATSUE Ken , KAMEYAMA Takeyoshi , SAIJO Yoshifumi , TANAKA Takashi , OKAMOTO Yoshihiro , FENG Zhonggang , MIYAZAKI Takako , YAMAGISHI Masaaki , YOSHIZAWA Makoto , UMEZU Mitsuo , YAMBE Tomoyuki

    J Artif Organs 15(1), 49-56, 2012-03-01

    Ichushi Web  References (22) Cited by (1)

  • Right Ventricular Outflow Tract Reconstruction -rationale for the advantage of expanded polytetrafluoroethylene conduit with bulging sinuses and fan-shaped valves-  [in Japanese]

    Yamamoto Yusuke , Yamagishi Masaaki , Miyazaki Takako

    … 景として, 石灰化や免疫拒絶反応を回避するePTFE素材の高い生体適合性があり, 免疫活性の高い乳幼児への適用においては特に有利であると考えられただけでなく, 大動脈のバルサルバ洞を摸したbulging sinusと, 半月弁の弁尖形状に倣って扇型(fan-shepe)にトリミングされた弁尖の, それぞれの流体力学的効果が良好な弁機能に寄与することが, 小児右心系模擬回路を用いた実験的検討によって示され, …

    Pediatric Cardiology and Cardiac Surgery 28(6), 295-305, 2012

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  • Two Cases of Glomus Tympanicum Surgically Treated without Embolization

    Kaneda Shoji , Hamada Masashi , Harimaya Atsushi , Odagiri Kyoko , Sekine Motoki , Iida Masahiro

    … Her right eardrum was seen bulging and was pulsatile. … Posteroinferior drilling of the tympanic annulus, chorda tympani transection, tentative removal of the incus, and malleus handle amputation provided us with better access to control the tumor, even though some difficulty was still encountered in working in the tympanic sinus and hypotympanum. …

    Practica Oto-Rhino-Laryngologica 105(8), 729-735, 2012

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  • Long-Term Outcome of Fibrous Dysplasia : Reconstruction With Dysplastic Bone : Case Report

    SAKAMOTO Yoshiaki , NAKAJIMA Hideo , TAMADA Ikkei , KISHI Kazuo , KAWASE Takeshi

    … A 10-year-old girl presented with facial asymmetry associated with bulging of the right fronto-orbital region with no symptoms. … Abnormal proliferation of the bone had obliterated the sphenoid, right frontal sinus, and right ethmoid sinuses. … A temporal musculopericranial flap was used to form a barrier between the opened ethmoid sinus and cranial cavity. …

    Neurologia medico-chirurgica 51(12), 857-860, 2011-12-15

    J-STAGE  Ichushi Web  References (17)

  • A Case of Chondrosarcoma of the Nasal Septum  [in Japanese]

    OHKUBO Junichi , KITAMURA Takuro , WAKASUGI Tetsuro , HASHIDA Koichi , HOHCHI Nobusuke , SUZUKI Hideaki

    … A 63-year-old woman seen for 15-month of nasal obstruction and headache was found in rhinoscope, to have a bilaterally bulging posterior nasal septum. … Computed tomography (CT) confirmed a tumorous mass extending to the sphenoid sinus and partially to the right posterior ethmoid sinus. …

    Practica Oto-Rhino-Laryngologica 103(7), 629-635, 2010-07-01

    J-STAGE  Ichushi Web  References (36) Cited by (1)

  • A Case of Advanced Thyroid Cancer with No Complaint of Hoarseness  [in Japanese]

    HIGASHIKAWA Masahiko , YAMAMOTO Yumiko , MINEHARU Akihito

    声帯固定があったにもかかわらず,嗄声の自覚が全くなかった甲状腺癌症例を経験した。症例は66歳の女性,上部消化管内視鏡検査の際に,偶然梨状窩の膨隆所見を指摘された。CTで甲状腺に石灰化を伴う腫瘤を認め,腫瘤は甲状軟骨翼の後方から喉頭内に侵入しているのが確認された。穿刺細胞診で甲状腺癌と診断された。<br>喉頭に浸潤する程度の甲状腺癌でありながら嗄声をきたさなかった要因として,腫瘤の進展形 …

    Nihon Kikan Shokudoka Gakkai Kaiho 57(4), 393-397, 2006-08-10

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