| Japanese |
|---|
| Title | Pulmonary artery catheterで観測した肺動脈圧波形に対する3種の制動素子の効果 |
|---|
| Subtitle | 原著 |
|---|
| Authors | 鈴木利保, 杵淵嘉夫, 竹山和秀, 山崎陽之介, 山本道雄, 滝口守 |
|---|
| Authors(kana) | |
|---|
| Organization | 東海大学医学部麻酔科 |
|---|
| Journal | 循環制御 |
|---|
| Volume | 16 |
|---|
| Number | 3 |
|---|
| Page | 340-345 |
|---|
| Year/Month | 1995/ |
|---|
| Article | 原著 |
|---|
| Publisher | 日本循環制御医学会 |
|---|
| Abstract | 「要旨」肺動脈カテーテル(pulmonary artery catheter：PAC)を介して観測した肺動脈圧波形に対する3種の制動素子(Accudynamic, ROSE, プレザクトII)による制動効果を検討した. 長さおよびプライミングする内液の脱気処理の有無の組み合わせによって, 周波数特性上の共振周波数がそれぞれ50Hz帯, 30Hz帯および10Hz帯にある3種のPACの系を作成し, それぞれの系に制動素子を挿入し, 周波数特性の変化を測定した. Accudynamicは制動効果を変えることのできる調整ノブを有し, ノブを調整することによって3種のPACの系においてオプチマル制動を得ることができた. ROSEは50Hz帯の共振周波数を持つ系に対して共振を抑える効果は認められたが, オプチマルな制動は得られず, 30Hz帯, 10Hz帯ではいずれも過制動となった. プレザクトIIは50Hz帯, 30Hz帯の共振周波数を持つ系に対して共振周波数の低下に応じた制動効果は認められたが不足制動にあり, オプチマルな制動は得られなかった. 10Hz帯では制動効果はほとんど認められなかった. 系の共振周波数が常に50Hzを超える動脈系のモニタのような場合には, 制動素子自体が系の周波数特性を規定するROSEが有効であると考えるが(Accudynamicのように調整可能である必要はない), プライミングによって周波数特性が劣化し, かつそのばらつきが大きいPACの系では, ROSEやプレザクトIIのような固定型の制動素子を用いてオプチマルな制動効果を得ることは難しい. |
|---|
| Practice | 基礎医学・関連科学 |
|---|
| Keywords | Damping, Pulmonary artery catheter |
|---|
| English |
|---|
| Title | Damping Effect of Three Damping Devices in Pulmpnary Artery Catheters |
|---|
| Subtitle | |
|---|
| Authors | Toshiyasu Suzuki, Yoshio Kinefuchi, Kazuhide Takeyama, Yonosuke Yamasaki, Michio Yamamoto, Mamoru Takiguchi |
|---|
| Authors(kana) | |
|---|
| Organization | Department of anesthesiology, School of Medicine, Tokai University |
|---|
| Journal | Circulation Control |
|---|
| Volume | 16 |
|---|
| Number | 3 |
|---|
| Page | 340-345 |
|---|
| Year/Month | 1995/ |
|---|
| Article | Original article |
|---|
| Publisher | Japan Society of Circulation Control |
|---|
| Abstract | In-vivo experiments were carried out to evaluate the efficacy of three damping devices on the market, namely Accudynamic, ROSE and Prexact. By varying the degree of deaeration of the priming fluid, catheter-manometer systems were prepared to resonate at 50, 30, and 10 Hz respectively, and the devices were tested for their damping efficacy in three three frequency characteristics. By turning the knob on the Accudynamic, optimal damping was obtained in all of the three frequency characteristics. The application of the ROSE caused overdamping in the system whose resonant frequency was lowered around 30 and 10 Hz. With the Prexact, in the system with their resonant frequencies of 50 and 30 Hz, the resonant amplitude was efficiently suppressed but critical damping was unobtainable and in the system with the resonant frequency of 10 Hz, no damping effect was discernible. In clinical settings where the system resonant frequency was found around 7-12 Hz, only the Accudynamic device proved capable of pro ducing acceptable waveforms while the ROSE exhibited overdamping and the Prexact was totally ineffective. It seems that the effective damping is expected around 20 Hz or more with these two deviees. That is inappropriate for the use with pulmonary artery catheters. (Circ Cont 16：340〜345, 1995) |
|---|
| Practice | Basic medicine |
|---|
| Keywords | Damping, Pulmonary artery catheter |
|---|