System for cardiac status determination
First Claim
1. A system for heart performance characterization and abnormality detection, comprising:
- an interface configured to receive a set of raw sampled data values representing patient blood pressure occurring during individual heart cycles of plurality of sequential heart cycles;
a signal processor configured to generate a mathematical distribution directly using the received raw sampled data set and calculate,(a) a first value substantially comprising an average of the raw sampled data set,(b) a second value substantially comprising a magnitude value of said distribution at a first deviation point from the average of the raw sampled data set and(c) a ratio of the first and second values as a representation of blood pressure variation; and
a comparator configured to compare said ratio with a threshold value to provide a comparison indicator; and
a patient monitor configured to, in response to said comparison indicator indicating said ratio exceeds the threshold value, generate an alert message associated with the threshold.
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Accused Products
Abstract
A system improves detection and diagnosis of blood pressure based cardiac function and tissue activities by analyzing and characterizing cardiac blood pressure signals (including non-invasive and invasive blood pressure, discrete values and continuous waveforms) using pressure signal variation and variability calculation and evaluation. The system combines blood pressure analysis with multi clinical related factors and parameters to detect and quantify cardiac health status and arrhythmia severity. The system determines an accurate time, location and severity of cardiac pathology and events by calculating blood pressure variability and statistical variation. The accurately and reliably identifies cardiac disorders, differentiates cardiac arrhythmias, characterizes pathological severity, predicts the life-threatening events, and supports evaluation of drug delivery effects.
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Citations
18 Claims
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1. A system for heart performance characterization and abnormality detection, comprising:
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an interface configured to receive a set of raw sampled data values representing patient blood pressure occurring during individual heart cycles of plurality of sequential heart cycles; a signal processor configured to generate a mathematical distribution directly using the received raw sampled data set and calculate, (a) a first value substantially comprising an average of the raw sampled data set, (b) a second value substantially comprising a magnitude value of said distribution at a first deviation point from the average of the raw sampled data set and (c) a ratio of the first and second values as a representation of blood pressure variation; and a comparator configured to compare said ratio with a threshold value to provide a comparison indicator; and a patient monitor configured to, in response to said comparison indicator indicating said ratio exceeds the threshold value, generate an alert message associated with the threshold. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. A method employed by at least one processing device for heart performance characterization and abnormality detection, comprising:
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receiving a set of raw sampled data values representing patient blood pressure occurring during individual heart cycles of plurality of sequential heart cycles; generating a mathematical distribution directly using the received raw sampled data set and calculating, (a) a first value substantially comprising an average of the raw sampled data set, (b) a second value substantially comprising a magnitude value of said distribution at a first deviation point from the average of the raw sampled data set and (c) a ratio of the first and second values as a representation of blood pressure variation; and comparing said ratio with a threshold value to provide a comparison indicator; and in response to said comparison indicator indicating said ratio exceeds the threshold value, generating an alert message associated with the threshold.
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18. A method employed by at least one processing device for heart performance characterization and abnormality detection, comprising the activities of:
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receiving a set of sampled data values representing patient blood pressure occurring during individual heart cycles of a plurality of sequential heart cycles; generating, from the received sampled data set, a spectrum comprising spectral value against frequency and calculating, (a) a first local maximum peak value of the spectrum, (b) a second local maximum peak value of the spectrum, (c) a third local maximum peak value of the spectrum, (d) a first value substantially comprising a difference between the first and the second local maximum peak values, (e) a second value substantially comprising a difference between the second and the third local maximum peak values, (f) a ratio of the first and second values as a representation of blood pressure variation; and comparing said ratio with a threshold value to provide a comparison indicator; and in response to said comparison indicator indicating said ratio exceeds the threshold value, generating an alert message associated with the threshold.
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Specification