Method of performing calibration and quality control of a sensor and apparatus for performing the method
First Claim
1. A method of performing calibration and quality control of a sensor for determining a parameter in a test fluid in which a calibration and quality control cycle is repeated, the cycle comprising the steps of:
- performing at least one calibration of the sensor using a reference material representing a parameter level of the parameter;
performing at least one quality control of the sensor, as calibrated, using another reference material representing another parameter level of the parameter than in the calibration step; and
repeating the above steps for at least two cycles,wherein in one cycle the reference material used in the quality control step was used in the calibration step of another cycle.
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Abstract
A method of performing calibration and quality control of a sensor for determining a parameter in a test fluid in which method a calibration and quality control cycle is repeated. A cycle includes the steps of performing a calibration and a quality control of the sensor using independent reference materials. In the method a reference material is in one cycle used in the quality control step which in a previous cycle was used in the calibration step. The present invention further provides an apparatus for performing the method.
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Citations
35 Claims
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1. A method of performing calibration and quality control of a sensor for determining a parameter in a test fluid in which a calibration and quality control cycle is repeated, the cycle comprising the steps of:
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performing at least one calibration of the sensor using a reference material representing a parameter level of the parameter; performing at least one quality control of the sensor, as calibrated, using another reference material representing another parameter level of the parameter than in the calibration step; and repeating the above steps for at least two cycles, wherein in one cycle the reference material used in the quality control step was used in the calibration step of another cycle. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
the parameter levels of all the reference materials used in said cycle define a total range; and said calibration range is at least one fourth of said total range.
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4. The method according to claim 2, wherein in the cycle
the parameter levels of the reference materials used for performing the calibration upon which the quality control is based define a calibration range; -
the parameter levels of all the reference materials used in said cycle define a total range; and said calibration range is at least one third of said total range.
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5. The method according to claim 1, wherein the cycle is repeated until each of the reference materials have been used at least once for quality control of the sensor.
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6. The method according to claim 1, wherein in the cycle the calibration performed in the calibration step is a first calibration and that the cycle further comprises the step of
performing a second calibration of the sensor using the same reference materials as were used in the first calibration step and in the quality control step. -
7. The method according to claim 6, wherein in the cycle
sensor responses are obtained to the reference materials used in the first calibration step and the quality control step; -
a further sensor response is obtained to the reference material used in the quality control step; and the second calibration is based on the sensor responses obtained in the first calibration step and on the further sensor response obtained.
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8. The method according to claim 6, wherein in the cycle
sensor responses are obtained to the reference materials used in the first calibration step and the quality control step; - and
the second calibration is based on the sensor responses obtained in the first calibration step and the quality control step.
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9. The method according to claim 1, wherein the parameter is a blood parameter.
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10. The method according to claim 1, wherein the reference materials are fluids held in sealed containers.
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11. A method of performing calibration and quality control of a sensor for determining a parameter in a test fluid comprising the steps of:
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performing a first calibration of the sensor using a reference material representing a parameter level of the parameter; performing a quality control of the sensor, as calibrated, using another reference material representing another parameter level of the parameter than in the calibration step; and performing a second calibration of the sensor using the same reference materials as were used in the steps of performing the first calibration and the quality control. - View Dependent Claims (12, 13, 14, 15, 16, 17)
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18. An apparatus for determining a parameter in a test fluid comprising
a sensor sensitive to the parameter in the test fluid and providing a sensor response; -
reference materials representing at least two different parameter levels of the parameter; and a programmable device for controlling the functioning of the apparatus, wherein the programmable device is programmed to control the perfpormance of calibration and quality control of the sensor in which a calibration and quality control cycle is repeated, the cycle comprising performance of at least one calibration of the sensor using a reference material representing a parameter level of the parameter; performance of at least one quality control of the sensor, as calibrated, using another reference material representing another parameter level of the parameter than in the calibration; and subsequent performance of the above calibration and quality control for at least two cycles, wherein in one cycle the reference material used in the quality control was used in the calibration of a previous cycle. - View Dependent Claims (19, 20, 21, 22, 23, 24, 25)
means for exposing the sensor to the reference materials for the parameter and obtaining a response; and means for reporting a measured parameter value, and wherein the programmable device comprises means for determining the measured parameter value.
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20. The apparatus according to claim 18, wherein the apparatus comprises reference materials representing at least three different parameter levels of the parameter.
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21. The apparatus according to claim 18, wherein at least two reference materials are located in one cartridge.
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22. The apparatus according to claim 18, wherein the sensor is a miniaturized planar sensor.
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23. The apparatus according to claim 18, wherein the sensor is located in a measuring chamber forming an integral part of the apparatus.
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24. The apparatus according to claim 18, wherein the sensor is located in a removable cassette.
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25. The apparatus according to claim 18, wherein the apparatus is a blood analyzer.
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26. A method of performing calibration and quality control of a sensor for determining a parameter in a test fluid comprising:
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performing multiple calibration and quality control cycles comprising; (a) performing a calibration of the sensor; and (b) performing a quality control of the sensor as calibrated, wherein in at least one of the calibration and quality control cycles, the step (a) of performing a calibration includes obtaining a sensor response corresponding to a first reference material which represents a first parameter level of the parameter, and the step (b) of performing a quality control includes obtaining a sensor response corresponding to a second reference material which represents a second parameter level of the parameter, wherein the first parameter level and the second parameter level differ, and wherein in at least another of the calibration and quality control cycles, the step (b) of performing a quality control includes obtaining a sensor response corresponding to the first reference material. - View Dependent Claims (27, 28, 29, 30, 31, 32, 33, 34, 35)
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Specification