| 摘要 |
The present application discloses a number of methods of calibrating a sensor for measuring an analyte in a patient monitoring system. In a first embodiment, the method comprises calculating a sensor drift; calibrating the sensor using at least one calibration fluid; and periodically updating the sensor calibration based on the sensor drift calculation. In a second embodiment, the system comprises means for adjusting a gas concentration in a fluid, and the method comprises providing a calibration fluid; setting the analyte concentration in the first fluid to a first concentration with said adjusting means; measuring the first analyte concentration with the sensor; setting the analyte concentration in the first fluid to a second concentration with said adjusting means; measuring the second analyte concentration with the sensor; and determining the calibration coefficients for the sensor from the measured first analyte concentration and the measured second analyte concentration. In a third embodiment, the method comprises exposing the sensor to a first fluid comprising a first unknown concentration of the analyte; measuring the first unknown analyte concentration with the sensor; determining the first unknown analyte concentration with an analyser external to the patient monitoring system; providing the sensor with the determined first analyte concentration, and determining the calibration coefficients for the sensor from the measured first unknown analyte concentration and the analyte concentration determined by the analyser. At least some of the above embodiments ensure that the period between recalibrations of the sensor is extended, thus reducing the number of disruptions to the sensor monitoring process.
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