Methods and devices for determining sensing device usability
First Claim
1. A method of determining device usability of an analyte sensing device, comprising the steps of:
- providing an analyte sensing device comprising a first electrical pad;
a second electrical pad; and
a humidity-responsive polymer layer contacting at least a portion of said first and said second electrical pads;
applying a potential across said first and said second electrical pads, wherein the first electrical pad is connected to an analyte sensing electrode and the second electrical pad is connected to a reference electrode;
measuring an electrical property associated with said humidity-responsive polymer layer; and
determining whether said measured electrical property associated with said humidity-responsive polymer layer has exceeded a humidity threshold level associated with said analyte sensing device usability,wherein said humidity-responsive polymer layer is selected from the group consisting of a crosslinked polyvinylpyrrolidone (PVP), a crosslinked polymer containing nitrogen heterocyclic groups, and combinations thereof.
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Abstract
Methods and devices for determining sensing device usability, e.g., for self-monitoring and point of care devices. In one embodiment, the invention is to a method of determining device usability, comprising the steps of providing a device comprising a first electrical pad; a second electrical pad; and a humidity-responsive polymer layer contacting at least a portion of the first and second electrical pads; applying a potential across the first and second electrical pads; measuring an electrical property associated with the humidity-responsive polymer layer; and determining whether the measured electrical property associated with the humidity-responsive polymer layer has exceeded a humidity threshold level associated with the device usability.
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Citations
14 Claims
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1. A method of determining device usability of an analyte sensing device, comprising the steps of:
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providing an analyte sensing device comprising a first electrical pad;
a second electrical pad; and
a humidity-responsive polymer layer contacting at least a portion of said first and said second electrical pads;applying a potential across said first and said second electrical pads, wherein the first electrical pad is connected to an analyte sensing electrode and the second electrical pad is connected to a reference electrode; measuring an electrical property associated with said humidity-responsive polymer layer; and determining whether said measured electrical property associated with said humidity-responsive polymer layer has exceeded a humidity threshold level associated with said analyte sensing device usability, wherein said humidity-responsive polymer layer is selected from the group consisting of a crosslinked polyvinylpyrrolidone (PVP), a crosslinked polymer containing nitrogen heterocyclic groups, and combinations thereof. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A method of determining device usability of an analyte sensing device, comprising the steps of:
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providing an analyte sensing device comprising a first electrical pad;
a second electrical pad; and
a humidity-responsive polymer layer contacting at least a portion of said first and said second electrical pads;applying a potential across said first and said second electrical pads, wherein the first electrical pad is connected to an analyte sensing electrode and the second electrical pad is connected to a reference electrode; measuring an electrical property associated with said humidity-responsive polymer layer; and determining whether said measured electrical property associated with said humidity-responsive polymer layer has exceeded a humidity threshold level associated with said analyte sensing device usability, wherein said humidity-responsive polymer layer is substantially circular and has a diameter of from about 20 μ
m to about 5 mm.
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13. A method of determining device usability of an analyte sensing device, comprising the steps of:
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providing an analyte sensing device comprising a first electrical pad;
a second electrical pad; and
a humidity-responsive polymer layer contacting at least a portion of said first and said second electrical pads;measuring an initial current value associated with said humidity-responsive polymer layer when said analyte sensing device is manufactured; applying a potential across said first and said second electrical pads, wherein the first electrical pad is connected to an analyte sensing electrode and the second electrical pad is connected to a reference electrode; measuring an electrical property associated with said humidity-responsive polymer layer; and determining whether said measured electrical property associated with said humidity-responsive polymer layer has exceeded a humidity threshold level associated with said analyte sensing device usability, wherein said humidity threshold level is at least five times higher than said initial current value.
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14. A method of determining device usability of an analyte sensing device, comprising the steps of:
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providing an analyte sensing device comprising a first electrical pad;
a second electrical pad; and
a humidity-responsive polymer layer contacting at least a portion of said first and said second electrical pads;measuring an initial impedance value associated with said humidity-responsive polymer layer when said analyte sensing device is manufactured; applying a potential across said first and said second electrical pads, wherein the first electrical pad is connected to an analyte sensing electrode and the second electrical pad is connected to a reference electrode; measuring an electrical property associated with said humidity-responsive polymer layer; and determining whether said measured electrical property associated with said humidity-responsive polymer layer has exceeded a humidity threshold level associated with said analyte sensing device usability, wherein said humidity threshold level is at least five times lower than said initial impedance.
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Specification