Methods and devices for determining sensing device usability
First Claim
1. A method of determining exposure of a glucose test strip to humidity, the method comprising:
- inserting said glucose test strip into a glucose meter, said glucose test strip comprising a glucose sensing electrode connected by a first conductive line to a first electrical contact pad and a reference electrode connected by a second conductive line to a second electrical contact pad, wherein a polymer layer responsive to humidity positioned on said glucose test strip contacts at least a portion of said first and said second conductive lines;
applying a potential across said polymer layer;
measuring an electrical property associated with said polymer layer; and
calculating a humidity exposure value from said electrical property,wherein said 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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Accused Products
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
11 Claims
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1. A method of determining exposure of a glucose test strip to humidity, the method comprising:
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inserting said glucose test strip into a glucose meter, said glucose test strip comprising a glucose sensing electrode connected by a first conductive line to a first electrical contact pad and a reference electrode connected by a second conductive line to a second electrical contact pad, wherein a polymer layer responsive to humidity positioned on said glucose test strip contacts at least a portion of said first and said second conductive lines; applying a potential across said polymer layer; measuring an electrical property associated with said polymer layer; and calculating a humidity exposure value from said electrical property, wherein said 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)
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8. A method of determining exposure of a glucose test strip to humidity, the method comprising:
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inserting said glucose test strip into a glucose meter, said glucose test strip comprising a glucose sensing electrode connected by a first conductive line to a first electrical contact pad and a reference electrode connected by a second conductive line to a second electrical contact pad, wherein a polymer layer responsive to humidity positioned on said glucose test strip contacts at least a portion of said first and said second conductive lines; applying a potential across said polymer layer; measuring an open circuit resistance associated with said polymer layer; calculating a mean relative humidity from said open circuit resistance; and correcting a glucose test result using the open circuit resistance and the mean relative humidity. - View Dependent Claims (9, 10, 11)
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Specification