Cardiac output monitor using fuzzy logic blood pressure analysis
First Claim
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1. A cardiac output monitor, comprising:
- an analog to digital converter for receiving an arterial blood pressure waveform and converting said waveform to blood pressure waveform data;
a digital signal processor for processing said blood pressure waveform data so as to obtain blood pressure feature data; and
a fuzzy logic processor programmed to perform a fuzzy logic process on said feature data, using a set of fuzzy logic rules, thereby obtaining stroke volume data.
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Abstract
A method of monitoring cardiac output. The method uses a blood pressure waveform as input. The waveform is digitized and various blood pressure features are extracted. The features are used as inputs to a fuzzy logic model, where each input is fuzzified by determining its degree of confidence as a member of one or more fuzzy membership regions. A rule base is applied to the defuzzified inputs to obtain a fuzzy stroke volume index. This output is defuzzied and used to calculate cardiac output.
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Citations
20 Claims
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1. A cardiac output monitor, comprising:
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an analog to digital converter for receiving an arterial blood pressure waveform and converting said waveform to blood pressure waveform data; a digital signal processor for processing said blood pressure waveform data so as to obtain blood pressure feature data; and a fuzzy logic processor programmed to perform a fuzzy logic process on said feature data, using a set of fuzzy logic rules, thereby obtaining stroke volume data. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A method of monitoring cardiac output, comprising the steps of:
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acquiring arterial blood pressure waveform data; processing said blood pressure waveform data so as to obtain blood pressure feature data; and applying a fuzzy logic process, using fuzzy logic rules, to said feature data, thereby obtaining stroke volume data. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18)
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19. A method of monitoring cardiac output, comprising the steps of:
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acquiring arterial blood pressure waveform data; processing said blood pressure waveform data so as to obtain blood pressure feature data, said blood pressure feature data comprising at least a measure of systolic area and a measure of vascular resistance; and applying a set of fuzzy logic rules to said feature data, thereby obtaining stroke volume data. - View Dependent Claims (20)
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Specification