Test strip
First Claim
1. A teststrip for use in an assay to determine the presence or concentration of analyte in a liquid specimen, the teststrip comprising;
- (a) a reagent layer;
(b) a surfactant treated netting, overlaying the reagent layer, having openings of a size sufficient to pass a liquid specimen;
(c) means for maintaining the surfactant treated netting in a spaced-apart relationship with the reagent layer so as to define a space of controlled volume therebetween such that when liquid specimen is applied to the surfactant treated netting a controlled volume thereof will pass through the surfactant treated netting and be held by surface tension in substantially uniform contact with the reagent layer; and
(d) a sink means, positioned at the periphery of the surfactant treated netting, which is capable of absorbing and holding liquid specimen which is not held in the space of controlled volume.
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Accused Products
Abstract
The operative site of an assay device is dosed with a controlled volume of a liquid specimen by a holding device which holds the controlled volume of specimen in contact with the operative site, although the holding device remains out of contact with the operative site. A sink device is in contact with the margin of the holding device and moves excess specimen away from the holding device. In one embodiment the device makes possible a non-wipe teststrip architecture. The device can be used in the detection of analytes including glucose or cholesterol in blood or urine and can be interrogated visually, optically or electrically, depending on the reagent used at the operative site.
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Citations
14 Claims
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1. A teststrip for use in an assay to determine the presence or concentration of analyte in a liquid specimen, the teststrip comprising;
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(a) a reagent layer; (b) a surfactant treated netting, overlaying the reagent layer, having openings of a size sufficient to pass a liquid specimen; (c) means for maintaining the surfactant treated netting in a spaced-apart relationship with the reagent layer so as to define a space of controlled volume therebetween such that when liquid specimen is applied to the surfactant treated netting a controlled volume thereof will pass through the surfactant treated netting and be held by surface tension in substantially uniform contact with the reagent layer; and (d) a sink means, positioned at the periphery of the surfactant treated netting, which is capable of absorbing and holding liquid specimen which is not held in the space of controlled volume. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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Specification