Electrochemical sensor strip with low porosity screen
First Claim
1. An electrode strip for use in an electrochemical sensor for measuring an analyte in an aqueous sample, comprising:
- an elongated electrode support having a terminal end;
a first and a second electrode on said support for electrochemical analysis of said analyte, said first electrode having a forwardly disposed leg which is near said terminal end and second electrode having a rearwardly disposed leg which is rearwardly disposed with respect to both said terminal end and said forward leg of said first electrode;
a dielectric layer, a screen, and a cover layer, all disposed atop each other and atop said electrodes and said support;
said dielectric layer and cover layer having an open-topped slot therein, said slot being open to said terminal end and extending over at least said forwardly and rearwardly disposed electrode legs, said slot forming a vent at least over said forwardly and rearwardly disposed electrode legs; and
said screen having a porosity between 10% and 40% to control analyte flow and volume in said slot and over said forwardly and rearwardly disposed electrode legs.
1 Assignment
0 Petitions
Accused Products
Abstract
The electrode test strip is used with an electrochemical sensor for measuring an analyte in an aqueous sample, e.g., glucose in blood. The electrode strip includes an elongated electrode support, a first and second electrode on the support, a slotted dielectric layer, a screen and a slotted cover layer, all disposed atop each and atop the electrodes in the support. The dielectric layer and the cover layer are typically adhesively attached (the adhesive layers further define the slot). The slot is open to the terminal end of the test strip and the cover. The screen, interposed in the slot, has a porosity between 10%-40% to control analyte flow and volume in the slot and over the test area defined by electrode legs. Further refinements include utilizing a surfactant on the screen.
-
Citations
10 Claims
-
1. An electrode strip for use in an electrochemical sensor for measuring an analyte in an aqueous sample, comprising:
-
an elongated electrode support having a terminal end;
a first and a second electrode on said support for electrochemical analysis of said analyte, said first electrode having a forwardly disposed leg which is near said terminal end and second electrode having a rearwardly disposed leg which is rearwardly disposed with respect to both said terminal end and said forward leg of said first electrode;
a dielectric layer, a screen, and a cover layer, all disposed atop each other and atop said electrodes and said support;
said dielectric layer and cover layer having an open-topped slot therein, said slot being open to said terminal end and extending over at least said forwardly and rearwardly disposed electrode legs, said slot forming a vent at least over said forwardly and rearwardly disposed electrode legs; and
said screen having a porosity between 10% and 40% to control analyte flow and volume in said slot and over said forwardly and rearwardly disposed electrode legs. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
-
Specification