DETERMINATION OF VENTRICULAR PRESSURE AND RELATED VALUES
First Claim
1. A device for determining a cardiac function parameter, the device comprising:
- a sonic sensor for determining timing data of a closure of a mitral valve and an aortic valve;
a pressure cuff;
a sensing unit coupled to the pressure cuff for sensing;
for each cardiac cycle, blood breakthrough pressure data and corresponding time data from a closing of the mitral valve;
data relating to a velocity of propagation of a pressure wave as it travels along at least a portion of the pressure cuff; and
,a processing unit for determining a value of at least one cardiac function parameter based on the data.
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Abstract
A method and a device for determining a cardiac function parameter, the device including a sonic sensor for determining timing data of a closure of a mitral valve and an aortic valve, a pressure cuff and a sensing unit coupled to the pressure cuff for sensing. The sensing unit is configured to sense, for each cardiac cycle, blood breakthrough pressure data and corresponding time data from a closing of the mitral valve and data relating to a velocity of propagation of a pressure wave as it travels along at least a portion of the pressure cuff. The device also includes a processing unit for determining a value of at least one cardiac function parameter based on the data.
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Citations
26 Claims
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1. A device for determining a cardiac function parameter, the device comprising:
a sonic sensor for determining timing data of a closure of a mitral valve and an aortic valve; a pressure cuff; a sensing unit coupled to the pressure cuff for sensing; for each cardiac cycle, blood breakthrough pressure data and corresponding time data from a closing of the mitral valve; data relating to a velocity of propagation of a pressure wave as it travels along at least a portion of the pressure cuff; and
,a processing unit for determining a value of at least one cardiac function parameter based on the data. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A device for determining a cardiac function parameter, the device comprising:
a sonic sensor for determining timing data of a closure of a mitral valve and an aortic valve; a pressure sensor configured to be positioned within a central aorta of a patient for sensing pressure data during a pressure build-up within the central aorta; and
,a processing unit for determining a value of at least one cardiac function parameter based on the data. - View Dependent Claims (12, 13, 14, 15)
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16. A method for determining a cardiac function parameter, the method comprising:
- collecting timing data of a closure of a mitral valve and an aortic valve using a sonic sensor;
using a sensing unit coupled to a pressure cuff, sensing; for each cardiac cycle, blood breakthrough pressure data and corresponding time data from a closing of the mitral valve; data relating to a velocity of propagation of a pressure wave as it travels along at least a portion of the pressure cuff; and
,determining a value of at least one cardiac function parameter based on the data, using a processing unit. - View Dependent Claims (17, 18, 19, 20)
- collecting timing data of a closure of a mitral valve and an aortic valve using a sonic sensor;
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21. A device, the device comprising an infusion pump and a plurality of outputs, the outputs configured to release one or a plurality of agents in response to changes in LVEDP.
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22. A method of stabilizing a patient, the method comprising using an infusion pump with a plurality of outputs, the outputs configured to release one or a plurality of agents in response to changes in the patient'"'"'s LVEDP.
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23. A method for predicting ischemia, the method comprising:
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iteratively empirically determining values related to heart pressure at the brachial artery using a brachial cuff; iteratively mathematically deriving values relating to blood pressure at the aorta; iteratively calculating max dP/dT; iteratively calculating one or a plurality of changes in max dP/dT; determining, via a processor, whether the one or a plurality of changes of max dP/dT is indicative of ischemia; and
;Outputting via an output whether the one or a plurality of changes of max dP/dT is indicative of ischemia.
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24. A device for predicting ischemia, the device comprising:
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an input, the input configured to relay iteratively empirically determined values related to blood pressure at the brachial artery to a processor; the processor configured to iteratively mathematically deriving values relating to heart pressure at the aorta; iteratively calculate max dP/dT; iteratively calculate one or a plurality of changes in max dP/dT; and
,determine whether the one or a plurality of changes of max dP/dT is indicative of ischemia; and
,an output configured to output whether the one or a plurality of changes of max dP/dT is indicative of ischemia.
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25. A method for mathematically deriving values relating to heart pressure at the aorta, the method comprising:
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collecting empirical data relating to brachial blood pressure via a brachial cuff wherein the empirical data can be plotted on a polynomial function to describe brachial blood pressure; mathematically deriving a delay value representing the time shift between the polynomial function describing the brachial blood pressure and a polynomial function describing blood pressure at the aorta; and
,computing via a processor the polynomial function describing blood pressure at the aorta using the collected empirical data and the mathematically derived delay value.
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26. A device for mathematically deriving values relating to heart pressure at the aorta, the device comprising:
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an input for collecting empirical data relating to brachial blood pressure wherein the empirical data can be plotted on a polynomial function to describe brachial blood pressure; a processor for mathematically deriving a delay value representing the time shift between the polynomial function describing the brachial blood pressure and a polynomial function describing blood pressure at the aorta and for computing via a processor the polynomial function describing blood pressure at the aorta using the collected empirical data and the mathematically derived delay value; and
,an output for outputting data derived from the polynomial function describing blood pressure at the aorta.
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Specification