Hybrid strip
First Claim
1. A method of determining concentrations of a plurality of analytes from a single blood sample, placed in a single opening, the method comprising:
- (a) placing said single blood sample in an opening;
(b) absorbing said blood sample with a test matrix that includes a plurality of layers and a chromogenic agent, the test matrix including a disbursement layer;
(c) generating a colored response with said test matrix wherein said colored response is proportional to a concentration of a first analyte;
(d) drawing a portion of said single blood sample to a sample area by laterally spreading through the disbursement layer;
(e) contacting said portion of said single blood sample with an electrode and a counter-electrode in the sample area; and
(f) measuring an electrical property of said single blood sample though said electrode and counter-electrode wherein said electrical property is proportional to a concentration of a second analyte in said single blood sample.
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Accused Products
Abstract
A method of determining concentrations of a plurality of analytes from a single blood sample placed in a single opening. A portion of the single blood sample is absorbed by a test matrix that includes a plurality of layers and a chromogenic agent. A colored response is generated by the test matrix. The colored response is proportional to the concentration of a first analyte. A portion of the single blood sample is drawn into a capillary tube and placed in contact with an electrode and a counter-electrode. An electrical property of the single blood sample is analyzed through the electrode and counter-electrode. The electrical property is proportional to the concentration of a second analyte in the single blood sample.
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Citations
20 Claims
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1. A method of determining concentrations of a plurality of analytes from a single blood sample, placed in a single opening, the method comprising:
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(a) placing said single blood sample in an opening; (b) absorbing said blood sample with a test matrix that includes a plurality of layers and a chromogenic agent, the test matrix including a disbursement layer; (c) generating a colored response with said test matrix wherein said colored response is proportional to a concentration of a first analyte; (d) drawing a portion of said single blood sample to a sample area by laterally spreading through the disbursement layer; (e) contacting said portion of said single blood sample with an electrode and a counter-electrode in the sample area; and (f) measuring an electrical property of said single blood sample though said electrode and counter-electrode wherein said electrical property is proportional to a concentration of a second analyte in said single blood sample.
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2. A method of determining concentrations of a plurality of analytes from a single blood sample, the method comprising:
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(a) contacting said single blood sample with a top surface of an elongated disbursement layer and spreading said single blood sample substantially throughout an entire length of said disbursement layer; (b) contacting said single blood sample with a sample area such that a portion of said single blood sample is drawn to the sample area by passing through the disbursement layer; (c) delivering said single blood sample from said disbursement layer to a first stack, a second stack, and a third stack, each of said first, second, and third stacks positioned adjacent to and in constant contact with said disbursement layer, (d) moving the sample downward through the stacks in a direction substantially normal to the plane defined by the stacks; (e) producing a colored response at the bottom of each of the three stacks, the colored response at the bottom of the first stack being proportional to the concentration of a first analyte in the blood sample, the colored response at the bottom of the second stack being proportional to the concentration of a second analyte in the blood sample, and the colored response at the bottom of the third stack being proportional to the concentration of a third analyte in the blood sample; (f) delivering the portion of the single blood sample drawn into the sample area to an electrode and a counter-electrode; and (g) measuring an electrical property of the single blood sample using the electrode and counter-electrode wherein the electrical property is proportional to the concentration of a fourth analyte in the blood sample. - View Dependent Claims (3, 4, 5)
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6. A method of determining concentrations of a plurality of analytes from a single blood sample, the method comprising:
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(a) contacting a single blood sample from a lance with a top surface of an elongated disbursement layer of a test strip and spreading said single blood sample substantially throughout an entire length of said disbursement layer; (b) contacting said single blood sample with a sample area of an electrochemical portion of the test strip, wherein a residual amount of said single blood sample remaining after the contacting of (a) is used; (c) delivering said single blood sample from said disbursement layer to a first stack, a second stack, and a third stack, each of said first, second, and third stacks positioned adjacent to and in constant contact with said disbursement layer, (d) moving the sample downward through the stacks in a direction substantially normal to the plane defined by the stacks; (e) producing a colored response at the bottom of each of the three stacks, the colored response at the bottom of the first stack being proportional to the concentration of a first analyte in the blood sample, the colored response at the bottom of the second stack being proportional to the concentration of a second analyte in the blood sample, and the colored response at the bottom of the third stack being proportional to the concentration of a third analyte in the blood sample; and (f) measuring an electrical property of the single blood sample using the electrode and counter-electrode in the electrochemical portion, wherein the electrical property is proportional to the concentration of a fourth analyte in the blood sample. - View Dependent Claims (7, 8)
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9. An apparatus for measuring concentration of multiple analytes in a whole blood sample, comprising:
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(a) a test matrix comprising; (i) an elongated porous disbursement layer; (ii) a blood separation layer adjacent to the bottom surface of said disbursement layer; and (iii) at least two vertically aligned stacks spaced apart and adjacent to the bottom surface of said blood separation layer wherein a first one of said vertically aligned stacks includes multiple layers, said multiple layers including a reagent and a chromagen; (b) an electrochemical testing member comprising; (i) a sample area; (ii) an electrode; and (iii) a counter-electrode wherein said electrode and counter-electrode are oriented in electrical communication with each other when a blood sample is present, and the electrode and the counter-electrode are located in the sample area; and (c) a hybrid test strip holder having a top portion and a bottom portion sandwiching said test matrix therebetween;
said top and bottom portions holding said electrochemical testing member;
said top portion of said hybrid test strip holder having a sample application window exposing a top surface of said disbursement layer and a portion of the disbursement layer in contact with the sample area, such that blood from the disbursement layer may reach the sample area when a sample is present; and
said bottom portion of said hybrid test strip holder having at least one test reading window through which bottom surfaces of said first and second stacks can be read. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16)
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17. An apparatus for measuring concentration of multiple analytes in a whole blood sample, comprising:
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(a) a test matrix comprising; (i) an elongated porous disbursement layer; (ii) a blood separation layer adjacent to the bottom surface of said disbursement layer; and (iii) at least two vertically aligned stacks spaced apart and adjacent to the bottom surface of said blood separation layer wherein a first one of said vertically aligned stacks includes multiple layers, said multiple layers including a reagent and a chromagen; (b) an electrochemical testing member comprising; (i) a sample area; (ii) an electrode; and (iii) a counter-electrode wherein said electrode and counter-electrode are oriented in electrical communication with each other when a blood sample is present, and the electrode and the counter-electrode are located in the sample area; and (c) a hybrid test strip holder having a top portion and a bottom portion sandwiching said test matrix there between;
said top and bottom portions holding said electrochemical testing member;
said top portion of said hybrid test strip holder having a sample application window exposing a top surface of said disbursement layer and the sample area, such that blood from a single sample in a lance is received in the sample area and said disbursement layer; and
said bottom portion of said hybrid test strip holder having at least one test reading window through which bottom surfaces of said first and second stacks can be read. - View Dependent Claims (18, 19, 20)
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Specification