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US 2026/0235544 A1Published application
Diffusion control layer for use in electrochemical sensors
AssigneeMedtronic, Inc.
InventorsJennifer Lorenz Marckmann, Mohsen Askarinya, David L. Probst, John E. Burnes
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Abstract
An electrochemical sensor may include a common reference electrode, at least one counter electrode, and a work electrode platform including a work electrode and at least one diffusion control layer. The work electrode may be electrically coupled to the common reference electrode. The electrode may include a reagent substrate configured to react with an analyte to produce a signal indicative of a concentration of the analyte. The at least one diffusion control layer may be configured to control the diffusion of the analyte to the work electrode.
Claims20
An electrochemical sensor comprising:
- a common reference electrode;
- at least one counter electrode;
- and
- a work electrode platform comprising a first work electrode, a second work electrode disposed adjacent to the first work electrode, and at least one diffusion control layer,
- wherein at least one of the first work electrode or the second work electrode is electrically coupled to the common reference electrode,
- wherein the first work electrode comprises a first reagent substrate configured to react with a first analyte to produce a first signal indicative of a concentration of the first analyte,
- wherein the second work electrode comprises a second reagent substrate configured to react with a second analyte to produce a second signal indicative of the concentration of the second analyte,
- wherein the at least one diffusion control layer is configured to control a diffusion of the first analyte to the first work electrode and a diffusion of the second analyte to the second work electrode, and
- wherein the at least one diffusion control layer comprises:
- a first dissolvable diffusion control layer having a first area configured to cover the first work electrode and the second work electrode;
- and
- a second dissolvable diffusion control layer having a second area configured to cover the second work electrode and not to cover the first work electrode.
9 more elements
A medical device comprising:
- an electrochemical sensor comprising:
- a common reference electrode;
- at least one counter electrode;
- and
- a work electrode platform comprising a first work electrode, a second work electrode disposed adjacent to the first work electrode, and at least one diffusion control layer;
- processing circuitry operatively coupled to the electrochemical sensor;
- and
- a power source operatively coupled to the processing circuitry,
- wherein at least one of the first work electrode or the second work electrode is electrically coupled to the common reference electrode,
- wherein the first work electrode comprises a first reagent substrate configured to react with a first analyte to produce a first signal indicative of a concentration of the first analyte,
- wherein the second work electrode comprises a second reagent substrate configured to react with a second analyte to produce a second signal indicative of the concentration of the second analyte,
- wherein the at least one diffusion control layer is configured to control a diffusion of the first analyte to the first work electrode and a diffusion of the second analyte to the second work electrode, and
- wherein the at least one diffusion control layer comprises:
- a first dissolvable diffusion control layer having a first area configured to cover the first work electrode and the second work electrode;
- and
- a second dissolvable diffusion control layer having a second area configured to cover the second work electrode and not to cover the first work electrode.
13 more elements
A method of forming an electrochemical sensor, the method comprising:
- forming a common reference electrode;
- forming at least one counter electrode;
- and
- forming a work electrode platform comprising a first work electrode, a second work electrode disposed adjacent to the first work electrode, and at least one diffusion control layer,
- wherein at least one of the first work electrode or the second work electrode is electrically coupled to the common reference electrode,
- wherein the first work electrode comprises a first reagent substrate configured to react with a first analyte to produce a first signal indicative of a concentration of the first analyte,
- wherein the second work electrode comprises a second reagent substrate configured to react with a second analyte to produce a second signal indicative of the concentration of the second analyte,
- wherein the at least one diffusion control layer is configured to control a diffusion of the first analyte to the first work electrode and a diffusion of the second analyte to the second work electrode, and
- wherein the at least one diffusion control layer comprises:
- a first dissolvable diffusion control layer having a first area configured to cover the first work electrode and the second work electrode;
- and
- a second dissolvable diffusion control layer having a second area configured to cover the second work electrode and not to cover the first work electrode.
9 more elements
Dependencies are inferred from the claim text.