Use of conductive sensors in diagnostic assays
US5250439A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 14, 1992 |
| Grant date | Oct 5, 1993 |
| Priority date | — |
| Expiry date | Dec 14, 2012 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T436/144444
- WIPO fieldBiotechnology
- WIPO sectorChemistry
Abstract
A conductive sensor and its use in a diagnostic assay are disclosed. The miniaturized conductive sensor, utilizing a conducting polymer, is used in a diagnostic device to determine the presence or concentration of a predetermined analyte in a liquid test sample, wherein the predetermined analyte, like glucose, is assayed by an oxidase interaction. The interaction between the oxidase and a small amount of the predetermined analyte in the test sample generates, either directly or indirectly, a dopant compound in a reaction zone of the conductive sensor. The dopant compound then migrates to the detection zone of the conductive sensor of the diagnostic device to oxidize the conducting polymer and convert the conducting polymer from an insulating form to a conducting form. The resulting increase in conductivity of the conducting polymer is measured, then the conductivity increase is correlated to the concentration of the predetermined analyte in the test sample.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.