TEST APPARATUS AND METHODS FOR ST2 CARDIAC BIOMARKER
First Claim
1. A test strip for use in measuring a level of an ST2 cardiac biomarker in a whole blood sample, the test strip comprising:
- a base;
a plurality of conjugates, each conjugate comprising a reporter group bound to a first antibody that binds to ST2;
a conjugate pad disposed along a length of the base and configured to hold the plurality of conjugates that bind with ST2 to produce conjugate-ST2 complexes;
a plurality of second antibodies that bind to ST2;
a plurality of third antibodies that bind to the conjugate-ST2 complexes;
a membrane disposed on the base such that the membrane is in fluid communication with the conjugate pad, and wherein the plurality of second antibodies are bound to the membrane in a test location and the plurality of third antibodies are bound to the membrane in a control location arranged further from the conjugate pad than the test location; and
a plasma separation pad in fluid communication with a portion of the conjugate pad, wherein the plasma separation pad is disposed and configured to receive the whole blood sample and to pass blood plasma from the whole blood sample to the conjugate pad while inhibiting other components of the whole blood sample from passing to the conjugate pad.
1 Assignment
0 Petitions
Accused Products
Abstract
The technology described in this document can be embodied in a test strip for use in measuring a level of an ST2 cardiac biomarker in a whole blood sample. The test strip includes a base, and a plurality of conjugates, wherein each conjugate includes a reporter group bound to a first antibody that binds to ST2. A conjugate pad holds the plurality of conjugates that bind with ST2 to produce conjugate-ST2 complexes. The test strip also includes a plurality of second antibodies that bind to ST2, and a plurality of third antibodies that bind to the conjugate-ST2 complexes. The plurality of second antibodies are bound to a membrane in a test location, and the plurality of third antibodies are bound to the membrane in a control location. A plasma separation pad passes blood plasma from a whole blood sample to the conjugate pad while inhibiting other components.
-
Citations
20 Claims
-
1. A test strip for use in measuring a level of an ST2 cardiac biomarker in a whole blood sample, the test strip comprising:
-
a base; a plurality of conjugates, each conjugate comprising a reporter group bound to a first antibody that binds to ST2; a conjugate pad disposed along a length of the base and configured to hold the plurality of conjugates that bind with ST2 to produce conjugate-ST2 complexes; a plurality of second antibodies that bind to ST2; a plurality of third antibodies that bind to the conjugate-ST2 complexes; a membrane disposed on the base such that the membrane is in fluid communication with the conjugate pad, and wherein the plurality of second antibodies are bound to the membrane in a test location and the plurality of third antibodies are bound to the membrane in a control location arranged further from the conjugate pad than the test location; and a plasma separation pad in fluid communication with a portion of the conjugate pad, wherein the plasma separation pad is disposed and configured to receive the whole blood sample and to pass blood plasma from the whole blood sample to the conjugate pad while inhibiting other components of the whole blood sample from passing to the conjugate pad. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
-
-
14. A test apparatus comprising:
-
a test strip having a first end and an opposite second end; and a housing for the test strip, wherein the housing comprises; a first section comprising an outer face and an inner face, wherein the inner face of the first section comprises a channel to receive the test strip along the length of the first section, and a second section comprising an outer face and an inner face, wherein the second section is configured to be attached to the first section such that in an attached configuration the inner face of the first section faces the inner face of the second section, and the first and second sections together enclose the test strip within the housing, wherein the second section comprises; a buffer port configured to allow a buffer solution to be dispensed to a portion of the test strip proximate to the first end of the test strip, a test window configured to provide visualization of one or both of a test location and a control location on the test strip, a sample port disposed between the buffer port and the test window, the sample port configured to enable a sample of whole blood to be dispensed to the test strip, and a set of projections disposed on the inner face of the second section between the test window and the sample port such that in the attached configuration, each projection in the set of projections is in contact with the test strip, wherein a height of at least one projection in the set of projections is different from a height of another projection in the set of projections, and heights of the different projections are configured such that, in the attached configuration, the set of projections produces a pressure gradient that allows a fluid to flow at a predetermined flow rate along the length of the test strip between the first and last projections in the set of projections. - View Dependent Claims (15, 16, 17, 18, 19, 20)
-
Specification