Precalibrated fiber optic sensing method
First Claim
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1. A method of providing a precalibrated optical sensing system for sensing a parameter of blood, comprising the steps of:
- providing a stable optical sensor in solid form for sensing a parameter of blood;
determining an associated set of calibration data for the sensor by exposing the sensor to at least one calibration medium, measuring the optical response of the sensor to the medium and determining the associated calibration data based on the response, and then removing the sensor from the calibration medium;
recording the calibration data; and
sterilizing the sensor following calibration;
wherein the sensor may be stored at least 24 hours outside of any calibration medium and used along with recorded calibration data to sense a blood parameter without requiring recalibration prior to use.
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Abstract
A precalibrated sensing system for determining a blood parameter such as the partial pressures of oxygen (pO2) and carbon dioxide (pCO2), and the negative logarithm of hydrogen ion activity (pH). A dry sensor is provided which may be calibrated in the factory, packaged, sterilized and stored, without requiring recalibration prior to use.
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Citations
8 Claims
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1. A method of providing a precalibrated optical sensing system for sensing a parameter of blood, comprising the steps of:
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providing a stable optical sensor in solid form for sensing a parameter of blood; determining an associated set of calibration data for the sensor by exposing the sensor to at least one calibration medium, measuring the optical response of the sensor to the medium and determining the associated calibration data based on the response, and then removing the sensor from the calibration medium; recording the calibration data; and sterilizing the sensor following calibration; wherein the sensor may be stored at least 24 hours outside of any calibration medium and used along with recorded calibration data to sense a blood parameter without requiring recalibration prior to use. - View Dependent Claims (3, 4, 7, 8)
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2. A method of sensing a parameter of blood comprising the steps of:
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providing a stable optical sensor in solid form for sensing a parameter of blood; determining an associated set of calibration data for the sensor by exposing the sensor to at least one calibration medium, measuring the optical response of the sensor to the medium and determining the associated calibration data based on the response, and then removing the sensor from the calibration medium; recording the calibration data; sterilizing the sensor prior to use; storing the sensor for at least 24 hours; and using the sensor and recorded calibration data to sense a parameter of blood. - View Dependent Claims (5, 6)
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Specification