The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 08, 1996
Filed:
Mar. 21, 1995
Roger Phillips, Palo Alto, CA (US);
Geoffery McGarraugh, Scotts Valley, CA (US);
Franklin A Jurik, San Mateo, CA (US);
Raymond D Underwood, Red Bluff, CA (US);
LifeScan, Inc., Milpitas, CA (US);
Abstract
A whole blood glucose test strip for measuring glucose in an unmeasured whole blood sample which does not require removal of excess sample, and which is adapted for use in a reflectance reading apparatus which measures reflectance at about 635 nm and about 700 nm, the test strip comprising a handle having an aperture defined therein; and a porous, hydrophilic matrix disposed over the aperture such that one surface of the matrix is exposed to the atmosphere adjacent to one side of the strip and the other surface of the matrix is exposed to the atmosphere on the other side of the strip through the aperture, one of the surfaces being an upper sample receiving surface adapted to receive the whole blood sample on one side of the matrix and the second of the surfaces being a lower testing surface from which diffuse reflected light is measurable, the testing surface being opposite to the sample receiving surface. The matrix allows the blood color of the blood sample to be observed from the testing surface, allows at least a portion of the blood sample to penetrate through the matrix from the sample receiving surface to the testing surface, and filters out red blood cells such that they do not reach the testing surface. The matrix comprises reagent means for chemically reacting with glucose to create a change in reflectance which is indicative of the concentration of glucose present in the sample.