Signal quality metrics design for qualifying data for a physiological monitor
First Claim
1. A method for evaluating a signal, comprising:
- obtaining a signal quality metric based on a measured physiological parameter;
comparing the signal quality metric to a first threshold;
comparing the signal quality metric to second threshold if the processed signal quality metric is less than the first threshold; and
providing an indication of poor signal quality if the signal quality metric is less than the first threshold and the second threshold.
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Accused Products
Abstract
A method and a device for determining the quality of signal used for measuring a physiological parameter. One embodiment of the present invention is directed towards a pulse oximeter, where the measured physiological parameter includes a patient'"'"'s pulse rate and blood oxygen saturation. The signal quality, which is indicative of the accuracy and reliability of the measured physiological parameter, is calculated by combining a plurality of signal quality indicators, each of which is an indicator of a quality of the measured signal. The value of the signal quality metric is compared to a threshold and based on this comparison various decisions are made by the medical device. One decision is directed towards deciding whether or not to display the measured physiological parameter, to ensure that only accurate measured values are displayed. Another decision is directed towards providing feedback to guide the clinician to adjust the location of the sensor to a more suitable tissue location.
129 Citations
33 Claims
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1. A method for evaluating a signal, comprising:
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obtaining a signal quality metric based on a measured physiological parameter;
comparing the signal quality metric to a first threshold;
comparing the signal quality metric to second threshold if the processed signal quality metric is less than the first threshold; and
providing an indication of poor signal quality if the signal quality metric is less than the first threshold and the second threshold. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method for evaluating a physiological measurement, comprising the acts of:
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obtaining a signal quality metric based on a physiological parameter acquired by a physiological sensor; and
directing an operator to reposition the physiological sensor if the signal quality metric is below a threshold value. - View Dependent Claims (12, 13, 14, 15, 17, 18, 19, 20, 22, 23)
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16. A tangible machine readable medium configured to evaluate a signal, comprising:
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code configured to obtain a signal quality metric based on a measured physiological parameter;
code configured to compare the signal quality metric to a first threshold;
code configured to compare the signal quality metric to a second threshold if the processed signal quality metric is less than the first threshold; and
code configured to provide an indication of poor signal quality if the signal quality metric is less than the first threshold and the second threshold.
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21. A tangible machine readable medium configured to evaluate a physiological measurement, comprising:
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code configured to obtain a signal quality metric based on a physiological parameter acquired by a physiological sensor; and
code configured to direct an operator to reposition the physiological sensor if the signal quality metric is below a threshold value.
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24. A system for evaluating a signal comprising:
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a sensor adapted to acquire a physiological parameter;
a signal processor adapted to obtain a signal quality metric based on the physiological parameter, to compare the signal quality metric to a first threshold, and to compare the signal quality metric to a second threshold if the processed signal quality metric is less than the first threshold; and
a device adapted to provide an indication of poor signal quality if the signal quality metric is less than the first threshold and the second threshold. - View Dependent Claims (25, 26, 27, 28)
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29. A system for evaluating a physiological measurement, comprising:
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a sensor adapted to acquire a physiological parameter;
a signal processor adapted to obtain a signal quality metric based on a physiological parameter and to compare the signal quality metric to a threshold value; and
an interface device configured to direct an operator to reposition the sensor if the signal quality metric is below the threshold value. - View Dependent Claims (30, 31, 32)
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33. A method for evaluating a signal comprising:
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obtaining signal quality indicators associated with the measurement of a physiological parameter; and
obtaining a signal quality metric associated with the signal quality indicators by non-neural network processes.
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Specification