CONGENITAL HEART DISEASE MONITOR
First Claim
1. A congential heart disease monitor comprising:
- a sensor configured to emit optical radiation having a plurality of wavelengths into a tissue site and to detect the optical radiation after attenuation by pulsatile blood flowing within the tissue site;
a patient monitor configured to drive the sensor, receive a sensor signal corresponding to the detected optical radiation and to generate at least one of a visual output and an audio output responsive to the sensor signal; and
a digital signal processor within the patient monitor programmed to derive a physiological parameter from sensor data responsive to the sensor signal, wherein the physiological parameter is measured at a baseline tissue site and a comparison tissue site, and wherein at least one of the outputs indicates a potential congenital heart disease condition according to a difference between the physiological parameter measured at the baseline tissue site and the physiological parameter measured at the comparison tissue site.
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Accused Products
Abstract
A congenital heart disease monitor utilizes a sensor capable of emitting multiple wavelengths of optical radiation into a tissue site and detecting the optical radiation after attenuation by pulsatile blood flowing within the tissue site. A patient monitor is capable of receiving a sensor signal corresponding to the detected optical radiation and calculating at least one physiological parameter in response. The physiological parameter is measured at a baseline site and a comparison site and a difference in these measurements is calculated. A potential congenital heart disease condition in indicated according to the measured physiological parameter at each of the sites or the calculated difference in the measured physiological parameter between the sites or both.
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Citations
17 Claims
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1. A congential heart disease monitor comprising:
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a sensor configured to emit optical radiation having a plurality of wavelengths into a tissue site and to detect the optical radiation after attenuation by pulsatile blood flowing within the tissue site;
a patient monitor configured to drive the sensor, receive a sensor signal corresponding to the detected optical radiation and to generate at least one of a visual output and an audio output responsive to the sensor signal; and
a digital signal processor within the patient monitor programmed to derive a physiological parameter from sensor data responsive to the sensor signal, wherein the physiological parameter is measured at a baseline tissue site and a comparison tissue site, and wherein at least one of the outputs indicates a potential congenital heart disease condition according to a difference between the physiological parameter measured at the baseline tissue site and the physiological parameter measured at the comparison tissue site. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A congenital heart disease screening method comprising the steps of:
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providing a patient monitor and corresponding sensor, the sensor capable of emitting optical radiation having a plurality of wavelengths into a tissue site and detecting the optical radiation after attenuation by pulsatile blood flowing within the tissue site, the patient monitor capable of receiving a sensor signal corresponding to the detected optical radiation and calculating a blood-related physiological parameter;
measuring the physiological parameter at a baseline tissue site and a comparison tissue site;
comparing the measured physiological parameter at the baseline tissue site and at the comparison tissue site; and
indicating a potential congenital heart disease condition based upon the comparison. - View Dependent Claims (8, 9, 10, 11)
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12. A congenital heart disease detection method comprising the steps of:
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determining a plurality of metrics responsive to sensor data derived from a plurality of tissue sites on an infant;
testing the metrics with respect to predetermined rules and thresholds; and
outputting diagnostics responsive to the test results, wherein the metrics are at least one of a physiological parameter measurement, a cross-channel measurement and a trend, and wherein the diagnostics are responsive to the likelihood of congenital heart disease. - View Dependent Claims (13, 14)
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15. A congential heart disease monitor comprising:
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a patient monitor configured to receive sensor data from at least one optical sensor attached to a plurality of tissue sites on an infant;
a pre-processor means for deriving at least one metric from the sensor data;
an analyzer means for testing the at least one metric according to at least one rule; and
a post-processor means for generating diagnostics based upon results of the testing, wherein the at least one rule defines when the at least one metric indicates a potential congential heart disease condition in the infant. - View Dependent Claims (16, 17)
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Specification