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ID 40901
フルテキストURL
Thumnail 71_3241.pdf 2.9 MB
タイトル(別表記)
On the measurement of the degree of retraction of the human tympanic membrane using alginate impression material Part 1. Experimental studies
著者
井口 武男 岡山大学医学部耳鼻咽喉科教室
抄録
The present author, to measure the human thmpanic membrane by making a mold of the external ear with alginate impression material, made preliminary fundamental experiments on phantoms and rabbits. 1. When alginate impression material was introduced to a phantom with rubber membrane 0.1mm thick, the pressure on the membrane being only 23mm Hg, an accurate mold was obtained. On the contrary, with wood's alloy, the membrane of the phantom swelled markedly and no accurate mold could be obtained. 2. The bony bulla of a rabbit being opened, the picture of the tympanic membrane was taken from the tympanumside through the opening, and it was compared to the alginate mold obtained by introducing the material into external auditory canal simultaneously. In this way, it was proved that the mold represented faithfully the shape of the tympanic membrane. 3. With alginate impression material several molds could be obtained repeatedly on one rabbit. 4. With wood's alloy, because it perforated the tympanic membrane of the rabbit by its weight and heat, no mold could be obtained. 5. The deformations of the tympanic membrane at various negative and positive pressures into rabbit's tympanum could be recorded in molds by introducing alginate impression material into the external auditory canal. 6. When more than 10mm Hg negative or positive pressure was loaded on rabbit's tympanic membrane from the external auditory canal, perforation was evoked at the pars flaccida in 15 out of 18 ears. 7. When the external ear and bony bulla of the rabbit are fixed and imbedded in celoidin, they contracted as a whole and the tympanic membrane underwent a considerable deformation.
発行日
1959-05-15
出版物タイトル
岡山医学会雑誌
出版物タイトル(別表記)
Journal of Okayama Medical Association
71巻
6-2号
出版者
岡山医学会
出版者(別表記)
Okayama Medical Association
開始ページ
3241
終了ページ
3249
ISSN
0030-1558
NCID
AN00032489
資料タイプ
学術雑誌論文
オフィシャル URL
https://www.jstage.jst.go.jp/article/joma1947/71/6-2/71_6-2_3241/_article/-char/ja/
関連URL
http://www.okayama-u.ac.jp/user/oma/
言語
Japanese
著作権者
岡山医学会
論文のバージョン
publisher
査読
有り
Eprints Journal Name
joma