Indicating the accuracy of a physiological parameter
First Claim
1. A method for displaying oxygen saturation of a patient'"'"'s blood comprising, using a processor configured to determine the oxygen saturation, wherein the processor is associated with a patient monitor, and wherein determining the oxygen saturation comprises:
- calculating using the processor an estimated value of the oxygen saturation of the patient'"'"'s blood based at least in part upon information received from a sensor;
displaying the estimated value on a display of the patient monitor;
calculating, using the processor, at least one statistical parameter associated with the estimated value based at least in part upon information received from the sensor, wherein calculating the at least one statistical parameter comprises calculating an accuracy of the estimated value based at least in part upon one or more data characteristics of the information received from the sensor, wherein the one or more data characteristics comprise a pulse amplitude, a pulse shape, or a correlation of infrared and red components; and
displaying the at least one statistical parameter with the estimated value on the display, wherein displaying the at least one statistical parameter comprises displaying the accuracy of the estimated value and at least one of an upper limit of a confidence interval and a lower limit of the confidence interval, wherein the displayed confidence interval limit is calculated based at least in part upon a predetermined confidence level or the information received from the sensor.
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Accused Products
Abstract
This disclosure describes systems and methods for displaying information that describes the accuracy of estimated values of physiological parameters. As part of the process of estimating a physiological parameter, the data used for the estimation are further analyzed to determine one or more statistical parameters indicative of the accuracy of the estimate. These statistical parameters are then displayed to the caregiver in order to provide the caregiver additional information concerning the estimated value. In the systems and methods described herein, one or more probability analyses are performed on the data used to generate the estimate of the physiological parameter. The analyses may include calculating the accuracy, confidence interval or some other statistical parameter representative of the accuracy of the estimate of the physiological parameter from the variations in the data An indication of the accuracy and/or an indication of the calculated probability may then be displayed to a caregiver or user.
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Citations
20 Claims
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1. A method for displaying oxygen saturation of a patient'"'"'s blood comprising, using a processor configured to determine the oxygen saturation, wherein the processor is associated with a patient monitor, and wherein determining the oxygen saturation comprises:
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calculating using the processor an estimated value of the oxygen saturation of the patient'"'"'s blood based at least in part upon information received from a sensor; displaying the estimated value on a display of the patient monitor; calculating, using the processor, at least one statistical parameter associated with the estimated value based at least in part upon information received from the sensor, wherein calculating the at least one statistical parameter comprises calculating an accuracy of the estimated value based at least in part upon one or more data characteristics of the information received from the sensor, wherein the one or more data characteristics comprise a pulse amplitude, a pulse shape, or a correlation of infrared and red components; and displaying the at least one statistical parameter with the estimated value on the display, wherein displaying the at least one statistical parameter comprises displaying the accuracy of the estimated value and at least one of an upper limit of a confidence interval and a lower limit of the confidence interval, wherein the displayed confidence interval limit is calculated based at least in part upon a predetermined confidence level or the information received from the sensor. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A method for display of a physiological parameter comprising, using a processor configured to determine the physiological parameter, wherein the processor is associated with a patient monitor, and wherein determining the physiological parameter comprises:
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calculating, using the processor, an estimated value of the physiological parameter based at least in part upon physiological data received from a sensor; displaying a graphical representation comprising a numerical scale on a display of the patient monitor; displaying a first indicator on the graphical representation at a first position relative to the numerical scale corresponding to the estimated value of the physiological parameter; and displaying a second indicator on the display describing a probability distribution of the estimated value of the physiological parameter, wherein displaying the second indicator comprises displaying the second indicator on the graphical representation at a second position relative to the numerical scale corresponding to an upper limit of a confidence interval or a lower limit of the confidence interval associated with the estimated value of the physiological parameter. - View Dependent Claims (8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 20)
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19. A monitor, comprising:
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a processor configured to; calculate an estimated value of oxygen saturation of a patient based at least in part upon information received from a sensor; calculate an accuracy of the estimated value based at least in part upon one or more data characteristics of the information received from the sensor, wherein the one or more data characteristics comprise a pulse amplitude, a pulse shape, or a correlation of infrared and red components; and calculate at least one of an upper limit of a confidence interval or a lower limit of the confidence interval, wherein the upper limit or the lower limit of the confidence interval is calculated based at least in part upon a predetermined confidence level or information received from the sensor; and a display configured to display the estimated value, the accuracy, and the upper limit or the lower limit of the confidence interval.
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Specification