Colorimetric test device with reduced error
OwnerCurt R. Eyster, Jerry T. Pugh +2inventors
InventorsCurt R. Eyster, Jerry T. Pugh, Yeung S. Yu, Phuong Kim
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Abstract
The invention provides testing devices useful in colorimeteric measurements of analytes in which at least a portion of the device's support is of a reflectivity that will not interfere with the meter's error detecting means
Claims12
A test device, comprising a support comprising a top surface, a bottom surface and an aperture therethrough, wherein at least a portion of the bottom surface surrounding the aperture has a reflectivity of less than about 12 percent at between about 600 and 730 nm.
A test device, comprising:
- a.) a support member defining a longitudinal axis and comprising:
- i.) a top surface, a bottom surface and an aperture therethrough;
- ii.) a distal edge substantially transverse to the longitudinal axis and configured for insertion into a measurement instrument;
- and
- iii.) alignment notch formed in the distal edge for engagement with an alignment member of the measuring device and comprising opposing edges wherein at least a portion of the opposing edges is in substantially parallel relation to the longitudinal axis;
- and
- b.) a reagent pad fixed to the support member and covering the aperture, the reagent material selected for reacting with at least one analyte,
- wherein at least a portion of the bottom surface surrounding the aperture has a reflectivity of less than about 12 percent at between about 600 and 730 nm.
A system for measuring the concentration of at least one analyte in a fluid, comprising
- a.) at least one test strip comprising a support comprising a top surface, a bottom surface and an aperture therethrough;
- and
- b.) a colorimeter wherein at least a portion of the bottom surface surrounding the aperture has a reflectivity of less than about 12 percent at between about 600 and 730 nm.
The system of claim 12, wherein the support member further comprises an alignment notch comprising opposing parallel edges.
Dependencies are inferred from the claim text.