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Method and means for monitoring cardiac output

  • US 3,985,123 A
  • Filed: 07/17/1975
  • Issued: 10/12/1976
  • Est. Priority Date: 07/17/1975
  • Status: Expired due to Term
First Claim
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1. Cardiac output apparatus for connection to an intra-aortic balloon pumping system including a balloon located in a patient'"'"'s aorta which is alternatively inflated and deflated in synchronism with the heart to improve blood flow therefrom, said apparatus displaying the quantity of blood flow in the patient'"'"'s heart in response to a signal representing blood pressure in an artery and including:

  • A. pressure signal means for transmitting an input pressure signal in response to the blood pressure signal from the system,B. means for transmitting a balloon deflation signal representing a pressure excursion at the time the balloon is deflated in response to the input pressure signal,C. means for transmitting a ventricle ejection pressure signal representing the pressure excursion during a ventricle ejection pulse in response to the input pressure signal,D. means responsive to the balloon deflation pressure and the ventricle ejection pressure signals for transmitting an output signal representing blood flow from the aorta, andE. means for utilizing the output signal.

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