Test device for detection of an analyte
First Claim
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1. An analyte test device for the detection of an analyte or analyte class, which test device comprises:
- a) a test device housing having two ends, walls to define an elongated strip cavity, and an expansion cavity at one end of the strip cavity;
b) a lateral, capillary-flow, elongated test strip having two ends located within the strip cavity and designed for the detection of an analyte or analyte class from a liquid sample;
the test strip includes, at a first end, a liquid sample-absorbing material and a reaction-detection material toward a second end;
wherein the liquid sample-absorbing material is located within the expansion cavity;
c) the liquid sample-absorbing material of selected dimensions and moves within the expansion cavity between a dry, nonexpanded state and a wet, expanded state when contacted with the liquid sample;
d) the expansion cavity selected in dimensions to mimic generally the width and length of the liquid sample-absorbing material and to permit expansion of the liquid sample-absorbing material to the wet, expanded state within the expansion cavity, and into contact with at least one wall of the housing to control the volume of the liquid test sample absorbed, and to provide sufficient pressure to drive capillary flow of the absorbed liquid sample, in a selected time period from the first end toward the second end of the test strip;
e) a means to introduce the liquid sample into contact with the liquid sample-absorbing material; and
f) a means for a user to determine the detected analyte or analyte class.
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Abstract
A test device, system and method, the device composed of an elongated, toothbrush-shaped, transparent, plastic housing and a lateral-flow test strip for the detection of an analyte, such as a beta-lactam in milk, in the housing, the housing having an expansion cavity to receive expanded, liquid-contacted, absorbing material in the test strip, and to control lateral flow rate and times in the test strip.
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Citations
20 Claims
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1. An analyte test device for the detection of an analyte or analyte class, which test device comprises:
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a) a test device housing having two ends, walls to define an elongated strip cavity, and an expansion cavity at one end of the strip cavity; b) a lateral, capillary-flow, elongated test strip having two ends located within the strip cavity and designed for the detection of an analyte or analyte class from a liquid sample;
the test strip includes, at a first end, a liquid sample-absorbing material and a reaction-detection material toward a second end;
wherein the liquid sample-absorbing material is located within the expansion cavity;c) the liquid sample-absorbing material of selected dimensions and moves within the expansion cavity between a dry, nonexpanded state and a wet, expanded state when contacted with the liquid sample; d) the expansion cavity selected in dimensions to mimic generally the width and length of the liquid sample-absorbing material and to permit expansion of the liquid sample-absorbing material to the wet, expanded state within the expansion cavity, and into contact with at least one wall of the housing to control the volume of the liquid test sample absorbed, and to provide sufficient pressure to drive capillary flow of the absorbed liquid sample, in a selected time period from the first end toward the second end of the test strip; e) a means to introduce the liquid sample into contact with the liquid sample-absorbing material; and f) a means for a user to determine the detected analyte or analyte class. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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20. An analyte test device for the detection of an analyte or analyte class, which test device comprises:
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a) a housing which comprises a transparent plastic blister secured on a flat seal-backed strip, the housing having two ends, walls to define an elongated strip cavity, and generally is rectangular in width and length, and a selected height expansion cavity with a top housing wall at one end of the strip cavity; b) a lateral, capillary-flow, elongated test strip having two ends and located within the strip cavity and designed for the detection of an analyte or analyte class from a liquid sample, the test strip includes, at a first end, a liquid sample-absorbing material and a reaction-detection material;
the test strip further includes a reference line and a control line toward a second end to detect an analyte or analyte class;
wherein, the liquid sample-absorbing material is located within the expansion cavity;c) the liquid sample-absorbing material of selected dimensions and moves within the expansion cavity between a dry, nonexpanded state and a wet, expanded state when contacted with the liquid sample; d) the expansion cavity is selected to permit expansion of the liquid sample-absorbing material in the wet, expanded state into contact with the top housing wall, and to provide sufficient pressure to drive the capillary-flow of the absorbed liquid sample, at a selected flow rate, from the first end toward the second end of the test strip; and e) an adhesive peel strip at the one end of the housing, which peel strip moves between a sealed state to seal the expansion cavity, an unsealed state wherein a liquid sample may be introduced into the expansion cavity, and a resealed state to seal the expansion cavity containing the absorbed liquid sample.
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Specification