System for analyte determination that includes a permutative grey scale calibration pattern
US7589828B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 26, 2006 |
| Grant date | Sep 15, 2009 |
| Priority date | — |
| Expiry date | Mar 15, 2028 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B2562/085
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A system for measuring an analyte in a body fluid sample includes a meter, with a grey scale photodetector module, and a memory module. The system also includes a test strip. The test strip has a substrate with a working surface for receiving the body fluid sample and a reverse surface that is in opposition to the working surface. The test strip also includes a permutative grey scale calibration pattern disposed on either of the working and reverse surfaces, with the permutative grey scale calibration pattern including more than one grey scale region. Moreover, the scale regions of the test strip define a grey scale permutation that uniquely corresponds to a calibration code of the test strip. The grey scale photodetector module is configured to detect the permutative grey scale calibration pattern of the test strip when the test strip is inserted into the meter. The memory module has stored therein a grey scale permutation matrix with a plurality of calibration codes, each of the calibration codes uniquely corresponding to a grey scale permutation of the permutative grey scale calibration pattern.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.