著者

真鍋 幸二

出版者

耳鼻咽喉科展望会

雑誌

耳鼻咽喉科展望 (ISSN:03869687)

巻号頁・発行日

vol.31, no.6, pp.813-816, 1988-10-15 (Released:2011-08-10)

参考文献数

10

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It has often been reported that epistaxis from the posterior part of the nasal cavity is attributable to the sphenopalatine artery in most cases. However, the descending artery may also be one of its causes. In particular, it is postulated that the major palatine artery which is running within the major palatine foramen is the responsible vessel. In cranial preparations of 21 cadavers the course and histology of major palatine artery were studied.The major palatine artery bends anteriorly in a sharp angle at 5 to 10 mm above the site where it passes through the palatine bone. At this site the artery is nearest to the mucosa. Like the maxillary artery, the major palatine artery is a muscular type artery. However, the outer membrane becomes thinner at the peripheral side. At that peripheral area there may by bone defect. Therefore, it is estimated that the blood vessel may break relatively easily due to exogenous factors.

著者

西城 隆一郎 間島 雄一 兵 昇 國貞 智弘 阿部 武史 高野 頌 さいじょう りゅういちろう まじま ゆういち ひょう のぼる くにさだ ともひろ あべ たけし たかの ひろし Saijo Ryuichiro Majima Yuichi Hyo Noboru Kunisada Tomohiro Takano Hiroshi

出版者

耳鼻咽喉科展望会

雑誌

耳鼻咽喉科展望. 補冊 (ISSN:03869687)

巻号頁・発行日

vol.44, no.1, pp.38-43, 2001-08

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鼻内上顎洞篩骨洞開放術後の鼻・副鼻腔の形態を模したシリコン製の鼻・副鼻腔モデルを作製し、そのモデルに対し一定の粒子径をもった炭素粒子を噴霧し、その沈着分布パターンを検討した。結果は重量基準空気力学径6.99μmおよび14.61μmの粒子を用いた場合、とても鼻内顎洞篩骨洞開放術後のエアロゾル療法の標的部位と考えられるOMCおよび上顎洞、篩骨洞へ効果的に沈着していることが確認できた。上顎洞内では6.99μmの粒子を用いた方がより均等な沈着パターンをとった。また、ノズル角度による影響をみた実験においては、ノズル角度45°の場合が30°の場合に比べOMC、および上顎洞、篩骨洞へのエアロゾル沈着パターンを左右する要因としては、粒子径だけではなく、ノズル角度が粒子径と共に重要な要因であると考えられた。We restored a human nasosinus model whose sinuses underwent functional endoscopic sinus surgery.The nasal cavity was constructed from a cast made at autopsy, and the maxillary and ethmoid sinuses were reconstructed from computed tomogarphy(CT)images.Anterior and posterior ethmoid cells were dissected and the diameter of the maxillary ostium enlarged to 10mm. We evaluated the depositional patterns of carbon particles, administered by jet nebulizer, whose aerodynamic diameter was 6.99μm or 14.61μm.Both sizes were well deposited on the ostiomeatal complex, the maxillary sinus, and the ethmoid sinuses.We also evaluated the effects of the nebulizer nozzle angle on particle deposition in the nasal cavity.We found that a 45°angle was more effective than a 30°. Our results indicate that both particle size and nozzle angle are important factors in aerosol deposition.