Method and system for estimating momentary cardiovascular performance reserve
First Claim
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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Abstract
The invention relates to a method for determining a cardiovascular performance reserve for each individual patient, comprising the steps of: a) receiving input physiological data from the patient 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 representing the Respiratory Rate (RR) of said patient, wherein the Respiratory Rate (RR) value is provided by measurements using dedicated device(s), calculations from the input physiological data or manually by using best estimate; c) providing anthropometric data of said patient for calculating the Body Surface Area (BSA) of said individual, wherein the anthropometric data includes at least body dimensions (such as height and weight) of said patient; d) calculating the Cardiovascular Reserve (CVR) by using said Z parameter and said RR according to following formula: CVR=(Z/RR); e) calculating a Cardiovascular Reserve Index (CVRI) by standardizing said CVR (by said BSA) and normalizing it to a scale of 1 according to the following formula: CVRI=CVR/(BSA*4); and outputting said Cardiovascular Reserve Index.
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Citations
14 Claims
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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:
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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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A system for estimating momentary cardiovascular reserve, comprising:
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a) at least one data source capable of being connected to an individual for obtaining physiological data from said individual, for obtaining anthropometric data related to said individual and for obtaining a value representing the Respiratory Rate (RR) of said individual, wherein said physiological data is used for obtaining a parameter Z which is or approximates the product of the Stroke Volume (SV) by the Systemic Vascular Resistance (SVR), and wherein said anthropometric data is used for a calculation of the Body Surface Area (BSA) of said individual; and b) an analysis unit, employing a processor and a memory, in communication with said at least one data source adapted for processing the data received from said at least one data source, in order to determine an index representing said momentary cardiovascular reserve by calculating 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)),
wherein the analysis unit is configured to output a notification of cardiovascular status of the individual based on the CVRI, the notification providing heart failure and/or shock information for prioritizing medical assistance or triage for the individual over other individuals awaiting medical assistance or triage. - View Dependent Claims (10, 11, 12, 13, 14)
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Specification