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Method and system for estimating momentary cardiovascular performance reserve

  • US 9,603,534 B2
  • Filed: 01/31/2013
  • Issued: 03/28/2017
  • Est. Priority Date: 02/13/2012
  • Status: Active Grant
First Claim
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1. A method for determining a cardiovascular performance reserve for an individual using a medical system that includes at least one data source and a computerized analysis unit in communication with the at least one data source, the computerized analysis unit employing a processor and a memory, comprising the steps of:

  • a. receiving, by the analysis unit from the at least one data source, input physiological data from the individual for obtaining a parameter Z which is or approximates the product of the Stroke Volume (SV) by the Systemic Vascular Resistance (SVR);

    b. providing a value, to the analysis unit from the at least one data source, representing the Respiratory Rate (RR) of said individual;

    c. providing anthropometric data, to the analysis unit from the at least one data source, of said individual for calculating the Body Surface Area (BSA) of said individual;

    d. processing, by the analysis unit, the input physiological data signals to provide a normalized Cardiovascular Reserve Index (CVRI) by using said Z parameter, said RR and said BSA, according to the following formula;


    CVRI=((Z/RR)/(BSA*4));

    e. outputting said CVRI and estimating the individual'"'"'s medical condition therefrom; and

    f. outputting a notification of cardiovascular status of the individual based on the CVRI, and prioritizing medical assistance or triage for the individual based on the cardiovascular status notification indicating a heart failure and/or shock condition over other individuals awaiting medical assistance or triage.

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