System and method to measure the condition of a patients heart
First Claim
1. A system used to measure the heart condition of a patient, the system comprising:
- a measuring device configured to measure absolute blood pressure of the patient and to generate an absolute blood pressure signal indicative of the absolute blood pressure of the patient during a plurality of respiratory cycles of the patient; and
a processing element to process the absolute blood pressure signal, the processing element for generating a filtered blood pressure signal from the absolute blood pressure signal by substantially removing variations from the absolute blood pressure signal caused by respiratory activity of the patient during the plurality of respiratory cycles, the processing element further including a sampling element to sample the absolute blood pressure signal during a plurality of selected heart cycles that occur during the plurality of respiratory cycles and to generate a plurality of sampled blood pressure signals, and an averaging element to generate the filtered blood pressure signal by averaging the plurality of sampled blood pressure signals.
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Abstract
A system and method for measuring the heart condition of a patient is disclosed. The system includes a measuring device used to generate an absolute blood pressure signal indicative of the absolute blood pressure of the patient. A processing element receives and processes the absolute blood pressure signal, and generates (1) a filtered blood pressure signal by removing certain variations from the absolute blood pressure signal caused by respiratory activity of the patient; and (2) a set of parameters derived from the filtered blood pressure signal. The set of parameters measure certain aspects of the absolute blood pressure signal which are indicative of the performance and condition of the patient'"'"'s heart.
187 Citations
47 Claims
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1. A system used to measure the heart condition of a patient, the system comprising:
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a measuring device configured to measure absolute blood pressure of the patient and to generate an absolute blood pressure signal indicative of the absolute blood pressure of the patient during a plurality of respiratory cycles of the patient; and a processing element to process the absolute blood pressure signal, the processing element for generating a filtered blood pressure signal from the absolute blood pressure signal by substantially removing variations from the absolute blood pressure signal caused by respiratory activity of the patient during the plurality of respiratory cycles, the processing element further including a sampling element to sample the absolute blood pressure signal during a plurality of selected heart cycles that occur during the plurality of respiratory cycles and to generate a plurality of sampled blood pressure signals, and an averaging element to generate the filtered blood pressure signal by averaging the plurality of sampled blood pressure signals. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47)
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26. A method to analyze the heart condition of a patient, comprising the steps of:
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measuring absolute blood pressure of the patient during a plurality of respiratory cycles of the patient; generating an absolute blood pressure signal indicative of the absolute blood pressure of the patient during the plurality of respiratory cycles of the patient; generating a filtered blood pressure signal from the absolute blood pressure signal by substantially removing variations from the absolute blood pressure signal caused by respiratory activity of the patient during the plurality of respiratory cycles; the step of generating the filtered blood pressure signal further including the steps of; sampling the absolute blood pressure signal during each of a plurality of selected heart cycles that occur over course of the plurality of respiratory cycles; generating sampled blood pressure signals; averaging the sampled blood pressure signals; generating the filtered blood pressure signal from the averaged sampled blood pressure signals; and analyzing the condition of the patient'"'"'s heart based on the filtered blood pressure signal. - View Dependent Claims (27, 28, 29, 30)
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Specification