大動脈内バルーンパンピング（ＩＡＢＰ）用バルーンの新しい特性評価法と市販各種のバルーンの評価

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  • In vitro evaluation of IABP balloons and driver systems using volumetric method by electrical impedance.

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We contrived a method for real-time volumetry of balloons for IABP by measur-ing the electrical impedance. In this method, the impedance was measured continuously between two electrodes at both ends of the balloon within a rigid tube, which was filled with saline solution. Balloon volume (VB) was calculated following equation. VB=(RI-RD)V0/RI, (RI, RD: impedance value at inflation and deflation state of balloon, respectively. V0: tube volume between electrodes). We evaluated the performance of 6 balloons (Kontron 40 ml 9 Fr, Datascope 34ml 9.5 Fr, Boston_ Scientific 40 ml 10 Fr, 30 ml 9.5 Fr and Tokai Medical Products 37 ml 10.5 Fr, 22 ml 9.5 Fr) and 4 driver systems (Kontron KAAT, Datascope system 90 T, Boston Scientific Cardiac Assist 3001 and Toyobo VCT 30). Results showed different driving pressure-balloon volume loops and responses. And each driver system had specific working characteristics. We conclude that recognition of characteristics of driver system is important to use IABP safely and appropriately, and care should be taken when a balloon is used in conjunction with different manufacturer's driver system.

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  • 人工臓器

    人工臓器 21 (6), 1444-1449, 1992

    一般社団法人 日本人工臓器学会

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