METHOD AND APPARATUS FOR CONTROL OF NON-INVASIVE PARAMETER MEASUREMENTS
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Abstract
Improved methods and apparatus for non-invasively assessing one or more parameters associated with fluidic systems such as the circulatory system of a living organism, when such parameters are potentially affected by other concurrent events. In one exemplary embodiment, apparatus and methods for compensating for occlusive events (e.g., pressure cuff inflation) occurring ipsilateral to the location of parameter measurement are disclosed. Upon passive detection of signal degradation resulting from the event, the apparatus selectively enters a “wait state” wherein further processing of the hemodynamic data is suspended until the degrading event subsides. This behavior mitigates any adverse effects the event might have on the accuracy of the representation of the measured hemodynamic parameter generated by the system. In another exemplary embodiment, the measured data is analyzed in order to classify the type of event (e.g., occlusive or other), such classification allowing the system to appropriately tailor its response to the event.
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Citations
53 Claims
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1-31. -31. (canceled)
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32. A method of mitigating the effects of a change in a blood vessel characteristic on a physiologic parameter measurement, the method comprising:
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passively determining a change in at least one parameter associated with data generated from said measurement of said physiologic parameter; and adjusting processing of said data based on said determining, said adjusting at least in part mitigating said effects. - View Dependent Claims (33, 34, 35, 36, 37, 38)
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39. Physiologic parameter measuring apparatus adapted to mitigate the effects of a variation in blood vessel dynamics, the apparatus comprising:
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a non-invasive parameter sensor adapted for sensing a parameter associated with a blood vessel at a first location on the body of a subject and generating a signal relating thereto; a processor operatively coupled to said sensor; and a computer program running on said processor, said computer program adapted to process said signal to produce a representation of said measured parameter; wherein said computer program is further adapted to; (i) passively detect a change within said signal resulting from said change in said dynamics; and (ii) adjust said processing based on at least said change. - View Dependent Claims (40, 41, 42, 43, 44)
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45. A method of mitigating the effect of an alteration within physiologic parameter data obtained from a sensor applied to a living subject, the method comprising:
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analyzing said data to derive a substantially continuous representation of said physiologic parameter; detecting an event within said physiologic parameter within said signal; and adjusting said analyzing based on said event. - View Dependent Claims (46, 47, 48, 49, 50)
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51. Hemodynamic parameter measurement apparatus, said apparatus comprising:
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first apparatus adapted to non-invasively measure a hemodynamic parameter at a first location on a living subject; second apparatus adapted to passively detect a degrading event occurring within a blood vessel at a location ipsilateral to said first location of said subject; and third apparatus adapted to mitigate the effects of said degrading event on said measuring. - View Dependent Claims (52, 53)
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Specification