AUTO-CALIBRATING TEST SENSORS

• US 20090205399A1
• Filed: 02/12/2009
• Published: 08/20/2009
• Est. Priority Date: 02/15/2008
• Status: Abandoned Application

• Current Assignee: Bayer Healthcare LLC (Bayer AG)
• Original Assignee: Bayer Healthcare LLC (Bayer AG)
• Inventors: Sun, Hoi-Cheong S., Johnson, Gary J., Chen, Jun, Holzer, Matthew, Wu, Mu
• Application Number:
  US12/370,199
• Publication Number:
  US 20090205399A1
• Time in Patent Office: Days
• US Class Current: 73/1.20
• CPC Class Codes: G01N 33/48771 Coding of information, e.g. calibration data, lot number

Abstract

A method of making a test sensor configured to assist in determining information related to an analyte in a fluid sample is disclosed. The method comprises the act of providing a base having a first end and a second opposing end. The method further comprises the act of providing a fluid-receiving area configured to receive a fluid sample. The method further comprises the act of assigning calibration information to the test sensor. The method further comprises the act of forming at least one notch such that a depth of the notch corresponds to the calibration information.

Claims

1. A method of making a test sensor configured to assist in determining information related to an analyte in a fluid sample, the method comprising the acts of:

providing a base having a first end and a second opposing end;

providing a fluid-receiving area configured to receive a fluid sample;

assigning calibration information to the test sensor; and

forming at least one notch such that a depth of the notch corresponds to the calibration information.

2. The method of claim 1, wherein the at least one notch is formed at or near the second opposing end of the base.

3. A method of making a test sensor configured to assist in determining information related to an analyte in a fluid sample, the method comprising the acts of:

providing a base having a first end and a second opposing end;

providing a fluid-receiving area configured to receive a fluid sample;

assigning calibration information to the test sensor; and

wherein the test sensor includes at least one plate thereon such that the size of the at least one plate corresponds to the calibration information, the at least one plate including electrically-conductive material.

4. The method of claim 3, wherein the at least one plate is located at or near the second opposing end of the base.

5. A method of using a test sensor and a meter, the test sensor and meter using calibration information in determining information related to an analyte in a fluid sample, the method comprising the acts of:

providing a test sensor including a base having a first end and a second opposing end, the test sensor further including a fluid-receiving area configured to receive the fluid sample, the test sensor further including at least one notch formed therein;

assigning calibration information to the test sensor;

providing a meter with a test-sensor opening, the meter including a potentiometer positioned at or near the test-sensor opening, the potentiometer including a movable actuator, the moveable actuator receiving the at least one notch;

placing the test sensor into the test-sensor opening of the meter;

moving the test sensor so as to move the movable actuator;

determining a measured resistance of the potentiometer; and

applying the calibration information using the measured resistance to assist in determining the information related to the analyte in the fluid sample.

6. The method of claim 5, wherein the at least one notch is formed at or near the second opposing end.

7. The method of claim 5, wherein the potentiometer is a plunger-type potentiometer.

8. The method of claim 5, wherein the potentiometer is a slide-type potentiometer.

9. The method of claim 5 further comprising comparing the measured resistance to stored nominal resistance values to determine the calibration information to be applied.

10. A method of using a test sensor and a meter, the test sensor and meter using calibration information in determining information related to an analyte in a fluid sample, the method comprising the acts of:

providing a test sensor including a base having a first end and a second opposing end, the test sensor further including a fluid-receiving area configured to receive the fluid sample, the test sensor further including at least one notch formed therein;

assigning calibration information to the test sensor;

providing a meter with a test-sensor opening, the meter including a pseudo potentiometer positioned at or near the test-sensor opening, the pseudo potentiometer including a plurality of pads, the plurality of pads including resistive materials;

placing the test sensor into the test-sensor opening of the meter;

moving the test sensor so as to cause at least one of the plurality of pads to receive the at least one notch;

determining a measured resistance of the pseudo potentiometer; and

applying the calibration information using the measured resistance to assist in determining the information related to the analyte in the fluid sample.

11. A method of using a test sensor and a meter, the test sensor and meter using calibration information in determining information related to an analyte in a fluid sample, the method comprising the acts of:

providing a test sensor including a base having a first end and a second opposing end, the test sensor further including a fluid-receiving area configured to receive the fluid sample, the test sensor further including at least one notch formed therein;

assigning calibration information to the test sensor;

providing a meter with a test-sensor opening, the meter including a variable inductor positioned at or near the test-sensor opening, the variable inductor including a movable plunger and at least one wire coil, the moveable plunger being configured to move within the at least one wire coil, the moveable plunger receiving the at least one notch;

placing the test sensor into the test-sensor opening of the meter;

moving the test sensor so as to move the moveable plunger a distance within the at least one wire coil;

determining a measured electrical value of the variable inductor, the measured electrical value corresponding to the distance that the moveable plunger is moved within the at least one wire coil; and

applying the calibration information using the measured electrical value to assist in determining the information related to the analyte in the fluid sample.

12. The method of claim 11, wherein the measured electrical value is an inductance value.

13. The method of claim 11, wherein the at least one notch is formed at or near the second opposing end.

14. The method of claim 11, wherein the moveable plunger is comprised of ferromagnetic materials.

15. The method of claim 11, wherein the variable inductor forms a linear variable differential transducer.

16. The method of claim 15, wherein the measured electrical value is a voltage value.

17. The method of claim 11, wherein the measured electrical value is a frequency value.

18. The method of claim 11 further comprising comparing the measured electrical value to stored electrical values to determine the calibration information to be applied.

19. A method of using a test sensor and a meter, the test sensor and meter using calibration information in determining information related to an analyte in a fluid sample, the method comprising the acts of:

providing a test sensor including a base having a first end and a second opposing end, the test sensor further including a fluid-receiving area configured to receive the fluid sample, the test sensor further including at least one notch formed therein;

assigning calibration information to the test sensor;

providing a meter with a test-sensor opening, the meter including a variable capacitor positioned at or near the test-sensor opening, the variable capacitor including a movable plunger and a sleeve, the moveable plunger being configured to move within the sleeve, the moveable plunger receiving the at least one notch;

placing the test sensor into the test-sensor opening of the meter;

moving the test sensor so as to move the moveable plunger a distance within the sleeve;

determining a measured capacitance of the variable capacitor, the measured capacitance corresponding to the distance that the moveable plunger is pushed within the sleeve; and

applying the calibration information using the measured capacitance to assist in determining the information related to the analyte in the fluid sample.

20. The method of claim 19, wherein the at least one notch is formed at or near the second opposing end.

21. The method of claim 19 further comprising comparing the measured capacitance to stored capacitance values to determine the calibration information to be applied.

22. A method of using a test sensor and a meter, the test sensor and meter using calibration information in determining information related to an analyte in a fluid sample, the method comprising the acts of:

providing a test sensor including a base having a first end and a second opposing end, the test sensor further including a fluid-receiving area configured to receive the fluid sample, the test sensor further including at least one sensor plate thereon, the at least one sensor plate being made from electrically-conductive materials;

assigning calibration information to the test sensor;

providing a meter with a test-sensor opening, the meter including a meter plate positioned at or near the test-sensor opening, the meter plate being made from electrically-conductive materials;

placing the test sensor into the test-sensor opening of the meter;

moving the test sensor such that at least a portion of the meter plate overlaps at least a portion of the at least one sensor plate;

determining a measured capacitance of the meter plate, the measured capacitance corresponding to the size of the at least one sensor plate; and

applying the calibration information using the measured capacitance to assist in determining the information related to the analyte in the fluid sample.

23. The method of claim 22, wherein the at least one sensor plate is located at or near the second opposing end.

24. The method of claim 22 further comprising comparing the measured capacitance to stored capacitance values to determine the calibration information to be applied.

25. A method of using a test sensor and a meter, the test sensor and meter using calibration information in determining information related to an analyte in a fluid sample, the method comprising the acts of:

providing a test sensor including a base having a first end and a second opposing end, the test sensor further including a fluid-receiving area configured to receive the fluid sample, the test sensor further including at least one sense portion;

assigning calibration information to the test sensor;

providing a meter with a test-sensor opening, the meter including a parallel plate capacitor positioned at or near the test-sensor opening, the parallel plate capacitor including two electrically-conductive plates, the parallel plate capacitor being configured to allow the at least one sense portion of the test sensor to be positioned between the two electrically-conductive plates;

placing the test sensor into the test-sensor opening of the meter;

moving the test sensor such that at least the sense portion of the test sensor is positioned between the two electrically-conductive plates;

determining a measured capacitance of the parallel plate capacitor; and

applying the calibration information using the measured capacitance to assist in determining the information related to the analyte in the fluid sample.

26. The method of claim 25, wherein the at least one sense portion is located at or near the second opposing end.

27. The method of claim 25 further comprising comparing the measured capacitance to stored capacitance values to determine the calibration information to be applied.

28. A method of using a test sensor and a meter, the test sensor and meter using calibration information in determining information related to an analyte in a fluid sample, the method comprising the acts of:

providing a test sensor including a base having a first end and a second opposing end, the test sensor further including a fluid-receiving area configured to receive the fluid sample, the test sensor further including at least one notch formed therein;

assigning calibration information to the test sensor;

providing a meter with a test-sensor opening, the meter including a piezoelectric element positioned at or near the test-sensor opening, the piezoelectric element receiving the at least one notch;

placing the test sensor into the test-sensor opening of the meter;

moving the test sensor so as to compress the piezoelectric element a distance;

determining a measured voltage of the piezoelectric element, the measured voltage corresponding to the distance that the piezoelectric element is compressed; and

applying the calibration information using the measured voltage to assist in determining the information related to the analyte in the fluid sample.

29. The method of claim 28, wherein the at least one notch is formed at or near the second opposing end.

30. The method of claim 28, wherein the piezoelectric element includes quartz or barium titanate.

31. The method of claim 28 further comprising comparing the measured voltage to stored voltage values to determine the calibration information to be applied.