Electrochemical biosensor test strip
First Claim
1. A device for detecting or measuring the concentration of an analyte, comprising:
- a first electrical insulator;
two electrodes only said electrodes consisting of a working electrode and a counter electrode of substantially the same size, made of the same electrically conducting materials and supported on the first electrical insulator;
a second electrical insulator, overlaying the first electrical insulator and the electrodes and including a cutout portion that exposes a smaller surface area of the counter electrode than the working electrode;
a reagent for detecting or measuring the concentration of the analyte, the reagent substantially covering the exposed electrode surfaces in the cutout portion; and
a spreading mesh, impregnated with a surfactant, overlaying the cutout portion and affixed to the second electrical insulator,wherein the cutout portion and spreading mesh are of sufficient size and the reagent is in sufficient amount to receive a minimum whole blood sample of about 9 microliters for analyzing the analyte.
4 Assignments
0 Petitions
Accused Products
Abstract
An electrochemical biosensor test strip that has a minimum volume blood sample requirement of about 9 microliters. The test strip has working and counter electrodes that are substantially the same size and made of the same electrically conducting material placed on a first insulating substrate. Overlaying the electrodes is a second insulating substrate, which includes a cutout portion that forms a reagent well. The cutout portion exposes a smaller area of the counter electrode than the working electrode. A reagent for analysis of an analyte substantially covers the exposed areas of working and counter electrodes in the reagent well. Overlaying the reagent well and affixed to the second insulating substrate is a spreading mesh that is impregnated with a surfactant. The small cutout portion of 4 millimeters by 4.2 millimeters, small mesh of 6 millimeters by 5.8 millimeters, and small amount of reagent, 4 microliters before drying, allow the test strip to analyze a whole blood sample of about 9 microliters.
-
Citations
10 Claims
-
1. A device for detecting or measuring the concentration of an analyte, comprising:
-
a first electrical insulator; two electrodes only said electrodes consisting of a working electrode and a counter electrode of substantially the same size, made of the same electrically conducting materials and supported on the first electrical insulator; a second electrical insulator, overlaying the first electrical insulator and the electrodes and including a cutout portion that exposes a smaller surface area of the counter electrode than the working electrode; a reagent for detecting or measuring the concentration of the analyte, the reagent substantially covering the exposed electrode surfaces in the cutout portion; and a spreading mesh, impregnated with a surfactant, overlaying the cutout portion and affixed to the second electrical insulator, wherein the cutout portion and spreading mesh are of sufficient size and the reagent is in sufficient amount to receive a minimum whole blood sample of about 9 microliters for analyzing the analyte. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
-
Specification