Underfill detection system for a test sensor
First Claim
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1. A test sensor for measuring the concentration of an analyte in a liquid sample, the test sensor comprising:
- a base plate having a pair of electrodes and a reagent for electrochemically measuring the concentration of the analyte in the liquid sample; and
a lid having an upper surface, a lower surface, and a conductor disposed on the upper surface, the lower surface being mated to the base plate and forming at least one wall of a capillary channel for collecting the sample, the lid having an aperture for permitting the sample to contact the conductor to signal a full condition.
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Abstract
A test sensor having a pair of electrodes and a reagent for electrochemically measuring the concentration of the analyte in a liquid sample. The test sensor comprises a capillary channel for collecting the liquid sample and a conductor disposed outside the capillary channel. The conductor is in fluid communication with the capillary channel. The liquid test sample is collected and moved through the capillary channel. The liquid test sample contacts the conductor when the capillary channel is substantially full to signal a full condition.
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Citations
24 Claims
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1. A test sensor for measuring the concentration of an analyte in a liquid sample, the test sensor comprising:
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a base plate having a pair of electrodes and a reagent for electrochemically measuring the concentration of the analyte in the liquid sample; and
a lid having an upper surface, a lower surface, and a conductor disposed on the upper surface, the lower surface being mated to the base plate and forming at least one wall of a capillary channel for collecting the sample, the lid having an aperture for permitting the sample to contact the conductor to signal a full condition. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A test sensor for measuring the concentration of an analyte in a liquid sample, the test sensor comprising:
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a base plate having a pair of electrodes and a reagent for electrochemically measuring the concentration of the analyte in the liquid sample;
a spacer having a cutout forming side-walls of a capillary channel for collecting the sample;
a lid for forming another wall of the capillary channel; and
a conductor disposed outside of the capillary channel for contacting the sample when the capillary channel is substantially full for signaling a full condition. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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20. A method of determining the concentration of an analyte in a liquid sample with a test sensor, the test sensor having a pair of electrodes and a reagent for electrochemically measuring the concentration of the analyte in the liquid sample, the sensor including a capillary channel for collecting the liquid sample and a conductor disposed outside the capillary channel, the conductor being in fluid communication with the capillary channel, the method comprising:
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collecting the liquid test sample;
moving the liquid test sample though the capillary channel;
contacting the liquid test sample with the conductor when the capillary channel is substantially full; and
signaling a full condition when the liquid test sample has contacted the conductor. - View Dependent Claims (21, 22, 23, 24)
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Specification