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Heart defibrillating and monitoring system

  • US 4,106,494 A
  • Filed: 08/29/1977
  • Issued: 08/15/1978
  • Est. Priority Date: 08/29/1977
  • Status: Expired due to Term
First Claim
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1. In a heart defibrillating and monitoring system having a source of high-voltage defibrillating signals and signal monitoring means for monitoring signals indicating heart activity, a first electrode system for selectively applying defibrillating signals to a patient and for selectively applying monitoring signals to the means for monitoring signals, and a second electrode system for selectively applying monitoring signals to the means for monitoring signals, said means for monitoring signals include a first isolation amplifier, switch means for selectively applying monitoring signals to said first isolation amplifier alternatively from said first electrode system or from said second electrode system, the improvement comprising a second isolation amplifier coupled intermediate said first electrode system and said switch means, whereby to prevent current leakage between said first electrode system and said second electrode system during application of a defibrillating signal.

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