Polymer membranes for continuous analyte sensors
First Claim
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1. A device for continuous measurement of an analyte concentration, the device comprising:
- a sensor configured to continuously measure a signal associated with an analyte concentration in a host; and
a membrane located over the sensing mechanism, wherein the membrane comprises a polyurethane and a hydrophilic portion;
wherein the device is configured to provide, at analyte concentrations of from about 40 mg/dL to about 400 mg/dL, a level of accuracy corresponding to a mean absolute relative difference from 6.8% to 9.6% over a sensor session extending over a period of 7 days, wherein one or more reference measurements associated with calculation of the mean absolute relative difference are determined by analysis of blood.
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Abstract
Devices and methods are described for providing continuous measurement of an analyte concentration. In some embodiments, the device has a sensing mechanism and a sensing membrane that includes at least one surface-active group-containing polymer and that is located over the sensing mechanism. The sensing membrane may have a bioprotective layer configured to substantially block the effect and/or influence of non-constant noise-causing species.
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12 Claims
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1. A device for continuous measurement of an analyte concentration, the device comprising:
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a sensor configured to continuously measure a signal associated with an analyte concentration in a host; and a membrane located over the sensing mechanism, wherein the membrane comprises a polyurethane and a hydrophilic portion; wherein the device is configured to provide, at analyte concentrations of from about 40 mg/dL to about 400 mg/dL, a level of accuracy corresponding to a mean absolute relative difference from 6.8% to 9.6% over a sensor session extending over a period of 7 days, wherein one or more reference measurements associated with calculation of the mean absolute relative difference are determined by analysis of blood. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A system for continuous measurement of an analyte concentration, the system comprising:
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a sensor comprising; a sensing region configured to continuously produce sensor data associated with an analyte concentration in a host; and a membrane located over the sensing region, wherein the membrane comprises a polyurethane and a hydrophilic portion; a processor configured to process continuous sensor data; and a user interface configured to display information associated with continuous sensor data; wherein the sensor is configured to provide, at analyte concentrations of from about 40 mg/dL to about 400 mg/dL, a level of accuracy corresponding to a mean absolute relative difference from 6.8% to 9.6% over a sensor session extending over a period of 7 days, wherein one or more reference measurements associated with calculation of the mean absolute relative difference are determined by analysis of blood. - View Dependent Claims (8, 9, 10, 11, 12)
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Specification