| Japanese |
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| Title | PAC(pulmonary artery catheter)の物理的な特性と使いやすさとの関係 |
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| Subtitle | 原著 |
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| Authors | 鈴木利保*, 杵淵嘉夫*, 竹山和秀*, 山崎陽之介*, 山本道雄* |
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| Organization | *東海大学医学部麻酔科 |
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| Journal | 循環制御 |
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| Volume | 13 |
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| Number | 1 |
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| Page | 83-88 |
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| Year/Month | 1992/ |
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| Article | 原著 |
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| Publisher | 日本循環制御医学会 |
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| Abstract | 「要旨」8社, 10種類のスワンガンツカテーテルを対象に, 線膨張率, ヤング率(E)および曲げの剛性(EI)を測定し, カテーテルの使いやすさ, 留置したときの安定性との関係を検討した. カテーテルは断面構造によって, (1)円形のルーメンが肉厚な外套に埋め込まれた構造(Spectramed, B.Braun, Goodtec), (2)肉薄の外套内を十字ないしX字形の隔壁で分割したルーメンを持つ構造(Edwards, Terumo, USVP)に分けることができる. 前者の線膨張率は後者に比べて1.5〜数倍低く, 温度変化に対して安定である, ルーメンの非対称構造に由来する硬さの方向依存性を曲げの剛性変化率を用いて表すと, 前者は1.1〜1.2, 後者は1.3〜1.5となり, 前者は方向による曲げむらが小さく, 操作性と安定性に優れる. カテーテルを材質によって, (1)ポリウレタン(B.Braun, Goodtec), (2)ポリ塩化ビニールに分類すると, 前者のヤング率は後者に比べて1.4〜1.7倍大きい. しかし, この差は使用上で認識されることはなく, 材質の特性に応じて使い分けるべきである. |
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| Practice | 基礎医学・関連科学 |
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| English |
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| Title | Physical properties of PACs (pulmonary artery catheters) and their relation to ease of use |
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| Authors | Toshiyasu Suzuki, Yoshio Kinefuchi, Kazuhide Takeyama, Yonosuke Yamasaki, Michio Yamamoto |
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| Organization | Department of Anesthesiology School of Medicine TOKAI University |
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| Journal | Circulation Control |
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| Volume | 13 |
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| Number | 1 |
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| Page | 83-88 |
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| Year/Month | 1992/ |
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| Article | Original article |
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| Publisher | Japan Society of Circulation Control |
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| Abstract | Ten models of Swan-Ganz catheters from 8 manufacturers were measured for thermal expansion coefficient, Young's modulus and bending stiffness to study their relations to the ease of use and to the stability on indwelling. The catheters were divided into 2 groups by cross section stmcture：(1) circular lumen enveloped in a thick sheath (Spectramed, B.Braun, Goodtec), and (2) lumen panitioned with cross-shaped or X-letter shaped thin walls in a thin sheath (Edwards, Terumo, USVP). The former proved to have 1.5 to several times lower thermal expansion coefficients than the latter, being stable to changes in temperature. When the uneven stiffness on bending due to asymmetrical structure of lumina is expressed as the ratio of bending stiffness measured at two different directions. the former were found to have a ratio of 1.1-1.2, and the latter, 1.3-1.5：the former proved to be more even in stiffness with the direction of bending, being more advantageous in manipulation and stability. When the tested catheters were classified by material to (1) polyurethane, and (2) polyvinyl chloride, the former were found to have 1.4-1.7 times greater Young's moduli than the latter. This difference is never recognized in their clinical use, so that the catheters should be used appropriately, depending on their material characteristics. |
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| Practice | Basic medicine |
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