System and methods for determining an analyte concentration incorporating a hematocrit correction
First Claim
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1. A biosensor for quantifying a concentration of an analyte in a blood sample, comprising:
- a base layer having a distal end, a proximal end, and a top surface extending generally from the distal end to the proximal end;
a first chamber located above the top surface and having a first distal end and a first proximal end;
a second chamber located above the top surface and having a second distal end and a second proximal end, wherein the second proximal end is generally located at the proximal end of the base layer and the second distal end is fluidly connected to the first proximal end of the first chamber;
a first pair of electrodes disposed on the base layer and configured to determine a value corresponding to a hematocrit level of the blood sample, wherein a first portion of one of the first pair of electrodes is located in the first chamber, a second portion of the one of the first pair of electrodes is located in the second chamber, and the other of the first pair of electrodes is located in the second chamber; and
a second pair of electrodes disposed on the base layer and configured to determine a value corresponding to a concentration of the analyte in the blood sample, wherein one of the second pair of electrodes is the one of the first pair of electrodes having the first portion located in the first chamber and the second portion located in the second chamber, and the other of the second pair of electrodes is located in the first chamber.
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Abstract
Methods and devices for determining the concentration of a constituent in a physiological sample are provided. The blood sample is introduced into a test strip with portions of the blood sample being directed to both a first capillary and a second capillary. The first capillary configured to electrochemically determine a concentration of a first analyte in a blood sample by measuring a signal across a set of electrodes. The second capillary is configured to determine a hematocrit value of the blood sample by measuring a signal across a second set of electrodes.
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Citations
20 Claims
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1. A biosensor for quantifying a concentration of an analyte in a blood sample, comprising:
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a base layer having a distal end, a proximal end, and a top surface extending generally from the distal end to the proximal end; a first chamber located above the top surface and having a first distal end and a first proximal end; a second chamber located above the top surface and having a second distal end and a second proximal end, wherein the second proximal end is generally located at the proximal end of the base layer and the second distal end is fluidly connected to the first proximal end of the first chamber; a first pair of electrodes disposed on the base layer and configured to determine a value corresponding to a hematocrit level of the blood sample, wherein a first portion of one of the first pair of electrodes is located in the first chamber, a second portion of the one of the first pair of electrodes is located in the second chamber, and the other of the first pair of electrodes is located in the second chamber; and a second pair of electrodes disposed on the base layer and configured to determine a value corresponding to a concentration of the analyte in the blood sample, wherein one of the second pair of electrodes is the one of the first pair of electrodes having the first portion located in the first chamber and the second portion located in the second chamber, and the other of the second pair of electrodes is located in the first chamber. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A system for quantifying a concentration of an analyte in a blood sample, comprising:
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a biosensor, comprising; a base layer having a distal end, a proximal end, and a top surface extending generally from the distal end to the proximal end; a first chamber located above the top surface and having a first distal end and a first proximal end; a second chamber located above the top surface and having a second distal end and a second proximal end, wherein the second proximal end is generally located at the proximal end of the base layer and the second distal end is fluidly connected to the first proximal end of the first chamber; a first pair of electrodes disposed on the base layer, wherein a first portion of one of the first pair of electrodes is located in the first chamber, a second portion of the one of the first pair of electrodes is located in the second chamber, and the other of the first pair of electrodes is located in the second chamber; and a second pair of electrodes disposed on the base layer, wherein one of the second pair of electrodes is the one of the first pair of electrodes having the first portion located in the first chamber and the second portion located in the second chamber, and the other of the second pair of electrodes is located in the first chamber; and a meter configured to receive a first signal from the first pair of electrodes and a second signal from the from the second pair of electrodes, wherein the meter is configured to determine a value corresponding to a hematocrit level of the blood sample based on the first signal and determine a value corresponding to a concentration of the analyte in the blood sample based on the second signal. - View Dependent Claims (12)
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13. A method for manufacturing a biosensor, comprising:
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forming a first chamber on a top surface of a base layer having a distal end and a proximal end, wherein the first chamber has a first distal end and a first proximal end; forming a second chamber having a second distal end and a second proximal end on the top surface, wherein the second proximal end is generally located at the proximal end of the base layer and the second distal end is fluidly connected to the first proximal end of the first chamber; forming a first pair of electrodes configured to determine a value corresponding to a hematocrit level of the blood sample on the base layer, wherein a first portion of one of the first pair of electrodes is located in the first chamber, a second portion of the one of the first pair of electrodes is located in the second chamber, and the other of the first pair of electrodes is located in the second chamber; and forming a second pair of electrodes configured to determine a value corresponding to a concentration of the analyte in the blood sample on the base layer and, wherein one of the second pair of electrodes is the one of the first pair of electrodes having the first portion located in the first chamber and the second portion located in the second chamber, and the other of the second pair of electrodes is located in the first chamber. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20)
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Specification