Dual path immunoassay device
First Claim
Patent Images
1. A test device for use with a solution and for determining the presence of a ligand in a liquid sample, the test device comprising:
- a) one or more sorbent strips laid out in a “
T”
configuration with a test site located at the junction of the “
T”
, said test site having an immobilized ligand-binding mechanism;
b) a conjugate having a marker located along and supported by a first leg of the “
T”
;
c) a housing surrounding said one or more sorbent strips, said housing defining a first opening adjacent a first end of said first leg of the “
T”
configuration, said first opening adapted to receive the solution to cause said conjugate to laterally migrate over time along said first leg to said test site, and said housing defining a second opening adjacent a first end of a second leg of the “
T”
, said second opening adapted to receive the sample which can laterally migrate over time along said second leg which is perpendicular to said first leg to said test site, and said housing defining a window adjacent said test site through which said test site is viewable.
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Abstract
Systems include test cells with sorbent material in a T-shape and defining a first flow path for a solution and a second flow path for a sample, and a test line or test site with immobilized antigens or antibodies or other ligand binding molecules located at the junction of the T. A housing houses the sorbent material and defines a first hole adjacent an end of the first flow path for receiving the solution and a second hole adjacent an end of the second flow path for receiving the sample.
384 Citations
14 Claims
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1. A test device for use with a solution and for determining the presence of a ligand in a liquid sample, the test device comprising:
-
a) one or more sorbent strips laid out in a “
T”
configuration with a test site located at the junction of the “
T”
, said test site having an immobilized ligand-binding mechanism;b) a conjugate having a marker located along and supported by a first leg of the “
T”
;c) a housing surrounding said one or more sorbent strips, said housing defining a first opening adjacent a first end of said first leg of the “
T”
configuration, said first opening adapted to receive the solution to cause said conjugate to laterally migrate over time along said first leg to said test site, and said housing defining a second opening adjacent a first end of a second leg of the “
T”
, said second opening adapted to receive the sample which can laterally migrate over time along said second leg which is perpendicular to said first leg to said test site, and said housing defining a window adjacent said test site through which said test site is viewable. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method for testing a sample for the presence of a ligand, comprising:
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a) obtaining solution and a test device having (i) one or more sorbent strips laid out in a “
T”
configuration with a test site located at the junction of the “
T”
, said test site having an immobilized ligand-binding mechanism;(ii) a conjugate having a marker located along and supported by a first leg of the “
T”
;(iii) a housing surrounding said one or more sorbent strips, said housing defining a first opening adjacent a first end of said first leg of the “
T”
configuration, said first opening adapted to receive the solution to cause said conjugate to laterally migrate over time along said first leg to said test site, and said housing defining a second opening adjacent a first end of a second leg of the “
T”
, said second opening adapted to receive the sample which can laterally migrate over time along said second leg which is perpendicular to said first leg to said test site, and said housing defining a window adjacent said test site through which said test site is viewable;b) applying the sample through the second opening to the second leg; c) after said applying the sample, applying the solution through the first opening to the first leg; and d) inspecting said test site through said window to determine an indication of the presence or lack thereof of the ligand in the sample. - View Dependent Claims (12, 13, 14)
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Specification