デフィブリレーション中に使用される電極ゲルの火花発生特性. 潜在的火災リスクである
R S Hummel1, J P Ornato, S M Weinberg
1Division of Biomedical Engineering, Medical College of Virginia, Richmond 23298.
JAMA
|November 25, 1988
まとめ
高電阻を持つ電極ゲルは,除細動中に過熱,液化,火花を起こす可能性があります. 低インピデンスゲルは,高電流の医療用途ではより安全です. 安全な電極ゲルを特定するために,新しい連邦基準が必要である.
科学分野:
- 医療機器の安全性 医療機器の安全性について
- バイオメディカルエンジニアリング
- 医療における電気の安全性
背景:
- デフィブリレーションの試行は,酸素濃縮された環境では火災のリスクをもたらす可能性があります.
- エレクトロドゲルは,除細動中の効率的な電気伝導に不可欠です.
- 以前の事件は,安全性のためにゲルの性質を評価する必要性を強調しています.
研究 の 目的:
- よく使われる電極ゲルの火花発生能力を評価する.
- エレクトロドゲルのインペダンスと電気放電特性との関係を決定する.
- デフィブリレーションエレクトロドゲルの安全性基準の開発に情報を提供すること.
主な方法:
- 人気のある7種類の電極ゲルを,繰り返し360-Jの電気放電でテストした.
- テストは,シミュレートされた集中治療室環境で50オームの負荷で実施されました.
- 測定された主要なパラメータには,初期阻力,電流の流れ,温度,および火花発生が含まれています.
主要な成果:
- 低初期阻力 (7 ± 1 Ω) のゲルは,高電流 (51 ± 1 A) をサポートし,冷たい (27 33 °C) であり,火花を発生しませんでした.
- 高初期阻力 (125 ± 14 Ω) のゲルは,より低い電流 (26 ± 2 A) を示し,かなり加熱 (52 ± 2 °C),液化され,4 〜 5 回の放電後に火花を放ちました.
- スパークの生成は,より高い初期阻力およびその後の加熱と直接相関していました.
結論:
- エレクトロドゲルの阻力は,除細動中のスパークを防ぐための重要な要因です.
- 高阻力ゲルは,過熱および潜在的点火による重大な安全リスクをもたらします.
- 高電流アプリケーションのための安全な電極ゲルをラベルするための連邦標準の開発が推奨されています.
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