Method for determining a test strip calibration code using a calibration strip

• US 20070273903A1
• Filed: 05/26/2006
• Published: 11/29/2007
• Est. Priority Date: 05/26/2006
• Status: Active Grant

• Current Assignee: Cilag Gmbh International (Johnson & Johnson), LifeScan IP Holdings, LLC
• Original Assignee: LifeScan Scotland Limited (Johnson & Johnson)
• Inventors: McInulty, John, Baskeyfield, Damian Edward Haydon, Robinson, Grenville Arthur, Cronshaw, Anthony J., O'Reilly, Thomas J.
• Granted Patent: US 7,474,391 B2
• Time in Patent Office: Days
• US Class Current: 358/1.900
• CPC Class Codes: A61B 2562/0295 Strip shaped analyte sensors for apparatus classified in A61B5/145 or A61B5/157 disposable multilayered or laminated electrodes G01N27/307; details of handling chemical test elements G01N33/4875
• CPC Class Codes: A61B 2562/085 combined with means for recording calibration data
• CPC Class Codes: A61B 5/14532 for measuring glucose, e.g. by tissue impedance measurement
• CPC Class Codes: G01N 27/3274 Corrective measures, e.g. error detection, compensation for temperature or hematocrit, calibration coding of calibration information G01N33/48771
• CPC Class Codes: G01N 33/48771 Coding of information, e.g. calibration data, lot number

Abstract

A method for determining a test strip calibration code for use in a meter includes inserting a calibration strip into the meter, with the calibration strip having a substrate and a permutative grey scale calibration pattern disposed on the substrate. In addition, the permutative grey scale calibration pattern includes more than one grey scale region that define a grey scale permutation uniquely corresponding to a calibration code of test strips in a package associated with the calibration strip. The method also includes: (i) detecting the permutative grey scale calibration pattern with a grey scale photodetector module of the meter, and (ii) determining a calibration code that uniquely corresponds to a grey scale permutation defined by the permutative grey scale calibration pattern based on a permutation matrix stored in the meter.

Claims

1. A method for determining a test strip calibration code for use in a meter, the method comprising:

inserting a calibration strip into the meter, the calibration strip having;

a substrate with a surface; and

a permutative grey scale calibration pattern disposed on the surface of the substrate, the permutative grey scale calibration pattern including at least a first grey scale region and a second grey scale region,

wherein the first and second grey scale regions define a grey scale permutation that uniquely corresponds to a calibration code of test strips in a package associated with the calibration strip;

detecting the permutative grey scale calibration pattern with a grey scale photodetector module of the meter;

determining a calibration code that uniquely corresponds to a grey scale permutation defined by the permutative grey scale calibration pattern based on a permutation matrix stored in the meter.

2. The method of claim 1 wherein the inserting step includes inserting a calibration strip with a permutative grey scale calibration pattern includes two grey scale regions.

3. The method of claim 1 wherein the inserting step includes inserting a calibration strip with a permutative grey scale calibration pattern includes a first grey scale region, a second grey scale region and a third grey scale region.

4. The method of claim 1 wherein the inserting step includes inserting a grey scale calibration pattern that further includes at least one optics calibration region.

5. The method of claim 4 wherein the at least one optics calibration region includes a black optics calibration region and a white optics calibration region.

6. The method of claim 5 wherein the at least one optics calibration region further has a 50% grey scale optics calibration region.

7. The method of claim 6 wherein the at least one optics calibration region further has a 25% grey scale optics calibration region and a 75% grey scale optics calibration region.

8. The method of claim 1 wherein the calibration strip has a paddle shape.

9. The method of claim 1 wherein the detecting step occurs during the inserting step.

10. The method of claim 1 wherein the detecting step occurs after the inserting step has been completed.

11. The method of claim 1 wherein the detecting step occurs as the calibration strip is being removed from the meter.