SYSTEM AND METHOD FOR CHARACTERIZING CIRCULATORY BLOOD FLOW
First Claim
1. A computer-implemented method for characterizing circulatory blood volume, comprising the steps of:
- a. acquiring, using a processor, a biological signal from a sensor;
b. conditioning, using said processor, said signal to create a conditioned signal;
c. processing, using said processor, said conditioned signal; and
d. calculating, using said processor, a derived parameter.
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Abstract
A computer-implemented method for characterizing circulatory blood volume is disclosed. The method has the steps of acquiring a biological signal that emulates the arterial pulse wave from a sensor. Two derived parameters, circulatory stress, which reflects a harmonic of heart rate, and circulatory blood flow, which reflects the amplitude of the unprocessed biological signal, are extrapolated from the biological signal, and are each compared to a threshold value and assessed to determine an adequacy of circulatory blood volume. In embodiments, the assessment of circulatory blood volume is used to manage a patient'"'"'s cardiovascular autoregulatory function or the adequacy of transfer of fluids to and from the circulatory system, with the ultimate goal of achieving a circulatory blood volume that adequately supplies the demands of the patient'"'"'s tissues and organs.
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Citations
20 Claims
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1. A computer-implemented method for characterizing circulatory blood volume, comprising the steps of:
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a. acquiring, using a processor, a biological signal from a sensor; b. conditioning, using said processor, said signal to create a conditioned signal; c. processing, using said processor, said conditioned signal; and d. calculating, using said processor, a derived parameter. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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- 12. A system for characterizing circulatory blood volume, comprising a processor that includes a module configured to process a biological signal acquired from a sensor to calculate a derived parameter.
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17. A computer-implemented apparatus for characterizing circulatory blood volume, comprising:
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a. means for acquiring a biological signal; b. means for conditioning said signal to create a conditioned signal; c. means for processing said conditioned signal; and d. means for calculating a derived parameter. - View Dependent Claims (18, 19)
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20. A computer-readable medium having stored therein instructions which, when executed by a processor, cause the processor to:
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a. acquire a signal related to a cardiovascular pulse wave from a sensor; b. condition said signal to create a conditioned signal; c. separate said conditioned signal into contiguous time windows; d. process said decomposed signal; e. calculate a derived parameter; and f. compare said derived parameter to a threshold value.
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Specification