Subcutaneous glucose electrode
First Claim
1. A method of using an analyte-responsive electrochemical sensor, the method comprising steps of:
- (a) implanting an analyte-responsive electrochemical sensor into a patient;
(b) determining, using a device other than the analyte-responsive electrochemical sensor, at least one analyte concentration value for the patient to generate a single calibration value;
(c) obtaining an output signal related to the analyte concentration from the analyte-responsive electrochemical sensor; and
(d) correlating the calibration value to the output signal to provide a single point, in vivo calibration of the electrochemical sensor.
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Accused Products
Abstract
A small diameter flexible electrode designed for subcutaneous in vivo amperometric monitoring of glucose is described. The electrode is designed to allow "one-point" in vivo calibration, i.e., to have zero output current at zero glucose concentration, even in the presence of other electroreactive species of serum or blood. The electrode is preferably three or four-layered, with the layers serially deposited within a recess upon the tip of a polyamide insulated gold wire. A first glucose concentration-to-current transducing layer is overcoated with an electrically insulating and glucose flux limiting layer (second layer) on which, optionally, an immobilized interference-eliminating horseradish peroxidase based film is deposited (third layer). An outer (fourth) layer is biocompatible.
1560 Citations
49 Claims
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1. A method of using an analyte-responsive electrochemical sensor, the method comprising steps of:
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(a) implanting an analyte-responsive electrochemical sensor into a patient; (b) determining, using a device other than the analyte-responsive electrochemical sensor, at least one analyte concentration value for the patient to generate a single calibration value; (c) obtaining an output signal related to the analyte concentration from the analyte-responsive electrochemical sensor; and (d) correlating the calibration value to the output signal to provide a single point, in vivo calibration of the electrochemical sensor. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A method of using an analyte-responsive electrochemical sensor, the method comprising steps of:
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(a) implanting an analyte-responsive electrochemical sensor into a patient, the analyte-responsive electrochemical sensor comprising; (i) at least one non-corroding electrode; and (ii) a sensing layer disposed over the electrode; (b) determining, using a device other than the analyte-responsive electrochemical sensor, at least one analyte concentration value for the patient to generate a single calibration value; (c) obtaining an output signal related to the analyte concentration from the analyte-responsive electrochemical sensor; and (d) correlating the calibration value to the output signal to provide a single point, in vivo calibration of the electrochemical sensor. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15, 16, 17)
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18. A method of using a glucose-responsive electrochemical sensor, the method comprising steps of:
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(a) implanting a glucose-responsive electrochemical sensor into a patient, the glucose-responsive electrochemical sensor comprising; (i) at least one non-corroding electrode; (ii) a sensing layer disposed over the electrode, the sensing layer comprising a glucose-responsive enzyme; and (iii) an interferant eliminating layer disposed over the sensing layer; (b) determining, using a device other than the glucose-responsive electrochemical sensor, at least one glucose concentration value for the patient to generate a single calibration value; (c) obtaining an output signal related to the glucose concentration from the glucose-responsive electrochemical sensor; and (d) correlating the calibration value to the output signal to provide a single point, in vivo calibration of the electrochemical sensor.
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19. A method of using an analyte-responsive electrochemical sensor, the method comprising steps of:
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(a) implanting an analyte-responsive electrochemical sensor into a patient; (b) assaying a body fluid of the patient, using a device other than the analyte-responsive electrochemical sensor, to obtain at least one analyte concentration value for the patient, and generating a single calibration value from the at least one analyte concentration value; (c) obtaining an output signal related to the analyte concentration from the anaylte-responsive electrochemical sensor; and (d) correlating the calibration value to the output signal to provide a linear calibration curve based on a single point, in vivo calibration of the electrochemical sensor.
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20. A method of using a glucose-responsive electrochemical sensor, the method comprising steps of:
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(a) subcutaneously implanting a glucose-responsive electrochemical sensor into a patient; (b) determining, using a device other than the glucose-responsive electrochemical sensor, a calibration value; (c) obtaining an output signal related to the glucose concentration from the glucose-responsive electrochemical sensor; and (d) correlating the calibration value to the output signal to provide a calibration of the electrochemical sensor based on a fixed baseline value at 0 mM glucose. - View Dependent Claims (21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49)
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Specification