Continuous monitoring using a predictive instrument
First Claim
1. A system for continuously monitoring the condition of a patient who has a cardiovascular disease, said system comprising:
- an electrocardiograph which during use is connected to the patient;
a waveform analyzer which analyzes a segment of an ECG waveform generated by the electrocardiograph for the patient;
a predictive instrument receiving output from the waveform analyzer, said predictive instrument programmed to complete a monitoring cycle in which the predictive instrument uses the output from the waveform analyzer to compute a probability of a life threatening cardiac condition based upon the segment of the patient'"'"'s ECG waveform; and
a detector module which receives computed probabilities from the predictive instrument for a sequence of monitoring cycles and for each monitoring cycle is programmed to compute a change-of-condition measure, wherein said change-of-condition measure is calculated by subtracting a computed probability for a previous monitoring cycle from the computed probability for a current monitoring cycle,said detector module further programmed to compare during each monitoring cycle the computed change-of-condition measure for that monitoring cycle to a threshold value and if in excess of said threshold value to generate an alarm notification.
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Abstract
An instrument for continuously monitoring the condition of a patient who has a cardiovascular disease, the instrument including an electrocardiograph; a waveform analyzer which analyzes a current segment of an ECG waveform; a computer receiving output from the waveform analyzer; and a control module. The computer is programmed to complete a monitoring cycle in which the computer uses the output from the waveform analyzer to compute a probability of a life threatening cardiac condition based upon the current segment of the patient'"'"'s ECG waveform. The control module causes the computer to periodically repeat the monitoring cycle and for each repetition of said monitoring cycle to compute a change-of-condition measure, wherein the change-of-condition measure is calculated by subtracting a computed probability for a previous monitoring cycle from the computed probability for the current monitoring cycle. The computer is also programmed to compare during each monitoring cycle the computed change-of-condition measure for that monitoring cycle to a threshold value and if in excess of the threshold value to generate an alarm notification.
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Citations
9 Claims
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1. A system for continuously monitoring the condition of a patient who has a cardiovascular disease, said system comprising:
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an electrocardiograph which during use is connected to the patient; a waveform analyzer which analyzes a segment of an ECG waveform generated by the electrocardiograph for the patient; a predictive instrument receiving output from the waveform analyzer, said predictive instrument programmed to complete a monitoring cycle in which the predictive instrument uses the output from the waveform analyzer to compute a probability of a life threatening cardiac condition based upon the segment of the patient'"'"'s ECG waveform; and a detector module which receives computed probabilities from the predictive instrument for a sequence of monitoring cycles and for each monitoring cycle is programmed to compute a change-of-condition measure, wherein said change-of-condition measure is calculated by subtracting a computed probability for a previous monitoring cycle from the computed probability for a current monitoring cycle, said detector module further programmed to compare during each monitoring cycle the computed change-of-condition measure for that monitoring cycle to a threshold value and if in excess of said threshold value to generate an alarm notification. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method for continuously monitoring the condition of a patient who has a cardiovascular disease, said method comprising:
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using an electrocardiograph to generate an EKG waveform for the patient; analyzing said EKG waveform; based on analyzing said EKG waveform, periodically computing a probability of a life threatening cardiac condition based upon the patient'"'"'s ECG waveform; from the periodically computed probability, periodically computing a change-of-condition measure, wherein said change-of-condition measure represents a difference between a previously computed probability and a more recent computed probability; periodically comparing the periodically computed change-in-condition measure to a threshold value; and if any computed change-in-condition measure exceeds said threshold value, generating an alarm notification.
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Specification