| 摘要 |
PROBLEM TO BE SOLVED: To reduce electric energy required for defibrillation by providing a shock pulse generator adapted to generate defibrillation shock formed by low energy pulse having very high voltage, each of low energy pulse having voltage higher than a specified value and smaller energy. SOLUTION: A high pressure switch of a heart defibrillator uses a gas discharge tube 43 as an active element, and utilizes striking voltage of arc, for example, 250V-2,000V. The discharge tube 43 is in the arc-extinguishing state and when it exceeds striking voltage of arc with impedance of 100M-10,000M, the arc is fired with 0.1μs or less. The voltage applied to the gas discharge tube 43 is generated by N-number of capacitors C1-CN and N-number of resistors R1-R3, and the discharge tube 43 discharges without a control element. This discharge generates defibrillation shock formed by one or plural low energy pulses having very high voltage, and each of low energy pulses has voltage higher than 1,000v and energy smaller than 2J.
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