Signal quality metrics design for qualifying data for a physiological monitor
First Claim
1. A method for displaying a physiological parameter, comprising:
- processing a signal quality metric associated with a measured physiological parameter to temper changes in the signal quality metric over time;
comparing an attribute of the processed signal quality metric to a threshold; and
displaying the measured physiological parameter for an interval determined by the attribute of the processed signal quality metric if the attribute is greater than the 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.
231 Citations
38 Claims
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1. A method for displaying a physiological parameter, comprising:
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processing a signal quality metric associated with a measured physiological parameter to temper changes in the signal quality metric over time; comparing an attribute of the processed signal quality metric to a threshold; and displaying the measured physiological parameter for an interval determined by the attribute of the processed signal quality metric if the attribute is greater than the threshold. - View Dependent Claims (2, 3, 4, 5)
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6. A method of indicating signal quality for a measured physiological parameter, comprising:
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performing at least two of a proportional control operation, an integral control operation, or a derivative control operation to a signal quality metric associated with a measured physiological parameter to generate at least two of a proportional signal quality metric, an integral signal quality metric, or a derivative signal quality metric, respectively; generating a processed signal quality metric based upon the at least two of the proportional signal quality metric, the integral signal quality metric, or the derivative signal quality metric; and providing an indication of the signal quality of the measured physiological parameter based upon the processed signal quality metric. - View Dependent Claims (7, 8, 9, 10, 11, 12)
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13. A tangible machine readable medium, comprising:
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code adapted to process a signal quality metric associated with a measured physiological parameter to temper changes in the signal quality metric over time; code adapted to compare the signal quality metric to a threshold; and code adapted to cause the display of the measured physiological parameter for an interval determined by the signal quality metric if the signal quality metric is greater than the threshold. - View Dependent Claims (14, 15, 16, 17)
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18. A tangible machine readable medium, comprising:
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code adapted to perform at least two of a proportional control operation, an integral control operation or a derivative control operation to a signal quality metric associated with a measured physiological parameter to generate at least two of a proportional signal quality metric, an integral signal quality metric, or a derivative signal quality metric, respectively; code adapted to generate a processed signal quality metric based upon the at least two of the proportional signal quality metric, the integral signal quality metric, or the derivative signal quality metric; and code adapted to provide an indication of the signal quality of a measured physiological parameter based upon the processed signal quality metric. - View Dependent Claims (19, 20, 21, 22, 23, 24)
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25. A patient monitoring system comprising:
a patient monitor configured to process a signal quality metric associated with a measured physiological parameter to temper changes in the signal quality metric over time, and to compare an attribute of the processed signal quality metric to a threshold, and a display configured to display the measured physiological parameter for an interval determined by an attribute of the processed metric if the attribute is greater than the threshold. - View Dependent Claims (26, 27, 28, 29)
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30. A patient monitor system comprising:
a patient monitor configured to perform at least two of a proportional control operation, an integral control operation, or a derivative control operation to a signal quality metric associated with a measured physiological parameter to generate a at least two of a proportional signal quality metric, an integral signal quality metric, or a derivative signal quality metric, respectively, and to generate a processed signal quality metric based upon the at least two of the proportional signal quality metric, the integral signal quality metric, or the derivative signal quality metric, and an output to provide an indication of the signal quality of the measured physiological parameter based upon the processed signal quality metric. - View Dependent Claims (31, 32, 33, 34, 35, 36)
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37. A method of manufacturing a patient monitoring system, comprising:
providing a patient monitor configured to process a signal quality metric associated with a measured physiological parameter to temper changes in the signal quality metric over time, and to compare an attribute of the processed signal quality metric to a threshold, and a display configured to display the measured physiological parameter for an interval determined by an attribute of the processed metric if the attribute is greater than the threshold.
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38. A method of manufacturing a patient monitoring system, comprising:
providing a patient monitor configured to perform at least two of a proportional control operation, an integral control operation, or a derivative control operation to a signal quality metric associated with a measured physiological parameter to generate at least two of a proportional signal quality metric, an integral signal quality metric, or a derivative signal quality metric, respectively, and to generate a processed signal quality metric based upon the at least two of the proportional signal quality metric, the integral signal quality metric, or the derivative signal quality metric, and an output to provide an indication of the signal quality of the measured physiological parameter based upon the processed signal quality metric.
Specification