System for Respiration Data Processing and Characterization
First Claim
1. A system for respiration or cardiac condition characterization and abnormality detection, comprising:
- an interface for receiving data representing a signal indicating concentration of carbon dioxide in patient gases over a plurality of signal cycles;
a signal processor for using the received data in determining a plurality of amplitude related characteristic values comprising at least two of,(a) a magnitude of an amplitude of a baseline of said signal,(b) a magnitude of an amplitude at an end of early exhalation of said signal,(c) a magnitude of an amplitude of a start of the exhalation plateau of said signal,(d) a magnitude of an amplitude of an end tidal point of said signal and(e) a magnitude of an amplitude at an end of inhalation point of said signal;
a comparator for comparing at least one of said amplitude related characteristic values or a value derived from said amplitude related characteristic values, with a threshold value to provide a comparison indicator; and
a patient monitor for in response to said comparison indicator indicating an amplitude related characteristic value or a value derived from said amplitude related characteristic values, exceeds the threshold value, generating an alert message associated with the threshold.
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Accused Products
Abstract
A system for respiration or cardiac condition characterization and abnormality detection includes an interface that receives data representing a signal indicating concentration of carbon dioxide in patient gases over multiple signal cycles. A signal processor uses the received data in determining multiple amplitude related characteristic values. A comparator compares at least one of the amplitude related characteristic values or a value derived from the amplitude related characteristic values, with a threshold value to provide a comparison indicator. A patient monitor in response to the comparison indicator indicating an amplitude related characteristic value or a value derived from the amplitude related characteristic values, exceeds the threshold value, generates an alert message associated with the threshold.
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Citations
19 Claims
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1. A system for respiration or cardiac condition characterization and abnormality detection, comprising:
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an interface for receiving data representing a signal indicating concentration of carbon dioxide in patient gases over a plurality of signal cycles; a signal processor for using the received data in determining a plurality of amplitude related characteristic values comprising at least two of, (a) a magnitude of an amplitude of a baseline of said signal, (b) a magnitude of an amplitude at an end of early exhalation of said signal, (c) a magnitude of an amplitude of a start of the exhalation plateau of said signal, (d) a magnitude of an amplitude of an end tidal point of said signal and (e) a magnitude of an amplitude at an end of inhalation point of said signal; a comparator for comparing at least one of said amplitude related characteristic values or a value derived from said amplitude related characteristic values, with a threshold value to provide a comparison indicator; and a patient monitor for in response to said comparison indicator indicating an amplitude related characteristic value or a value derived from said amplitude related characteristic values, exceeds the threshold value, generating an alert message associated with the threshold. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A system for respiration or cardiac condition characterization and abnormality detection, comprising:
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an interface for receiving data representing a signal indicating concentration of carbon dioxide in patient gases over a plurality of signal cycles; a signal processor for using the received data in determining at least one frequency related characteristic value comprising at least one of, (a) a dominant frequency of said signal and (b) a value derived by integration of the square of frequency over a bandwidth of said signal and comparing the frequency related characteristic value with a corresponding normal derived value; and a patient monitor for generating an alert message associated with the comparison, in response to the comparison. - View Dependent Claims (16, 17)
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18. A system for respiration or cardiac condition characterization and abnormality detection, comprising:
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an interface for receiving sampled data representing a signal indicating concentration of carbon dioxide in patient gases over a plurality of cardiac cycles; a signal processor for using the received sampled data in determining a mutual correspondence measure of the signal and a corresponding signal determined for the patient on a previous occasion; and a patient monitor for generating an alert message associated with the comparison, in response to the comparison. - View Dependent Claims (19)
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Specification