Systems and methods for blood glucose sensing
First Claim
1. A removable data storage device for a meter, said meter having a microprocessor and a meter memory containing machine language instructions, said meter receiving test strips at a first location to measure an analyte concentration in fluid samples, said meter receiving said removable data storage device at a second location, said data storage device comprising:
- a carrier having a proximal end and a distal end, said carrier being shaped for inserting said distal end into said meter in a preferred orientation;
said carrier including a circuit board, said circuit board having electrical contacts for electrically connecting to said meter at said second location, said electrical contacts including at least one ground contact and at least one voltage supply contact; and
said circuit board including a nonvolatile memory device storing data for use by said meter, said data including at least one constant for use by the machine language instructions stored in said meter memory, whereby when said removable data storage device is inserted into said meter in said preferred orientation, said at least one ground contact becomes electrically connected to said meter before said at least one voltage supply contact permitting reliable uploading of said at least one constant from said nonvolatile memory into the meter memory for subsequent use by the machine language instructions; and
whereby said removable data storage device can be removed from said meter such that said at least one ground contact becomes electrically disconnected from said meter after said at least one voltage supply contact thereby minimizing the risk of malfunction.
6 Assignments
0 Petitions
Accused Products
Abstract
A system for measuring a glucose level in a blood sample includes a test strip and a meter. The test strip includes a sample chamber, a working electrode, a counter electrode, fill-detect electrodes, and an auto-on conductor. A reagent layer is disposed in the sample chamber. The auto-on conductor causes the meter to wake up and perform a test strip sequence when the test strip is inserted in the meter. The meter uses the working and counter electrodes to initially detect the blood sample in the sample chamber and uses the fill-detect electrodes to check that the blood sample has mixed with the reagent layer. The meter applies an assay voltage between the working and counter electrodes and measures the resulting current. The meter calculates the glucose level based on the measured current and calibration data saved in memory from a removable data storage device associated with the test strip.
393 Citations
12 Claims
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1. A removable data storage device for a meter, said meter having a microprocessor and a meter memory containing machine language instructions, said meter receiving test strips at a first location to measure an analyte concentration in fluid samples, said meter receiving said removable data storage device at a second location, said data storage device comprising:
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a carrier having a proximal end and a distal end, said carrier being shaped for inserting said distal end into said meter in a preferred orientation;
said carrier including a circuit board, said circuit board having electrical contacts for electrically connecting to said meter at said second location, said electrical contacts including at least one ground contact and at least one voltage supply contact; and
said circuit board including a nonvolatile memory device storing data for use by said meter, said data including at least one constant for use by the machine language instructions stored in said meter memory, whereby when said removable data storage device is inserted into said meter in said preferred orientation, said at least one ground contact becomes electrically connected to said meter before said at least one voltage supply contact permitting reliable uploading of said at least one constant from said nonvolatile memory into the meter memory for subsequent use by the machine language instructions; and
whereby said removable data storage device can be removed from said meter such that said at least one ground contact becomes electrically disconnected from said meter after said at least one voltage supply contact thereby minimizing the risk of malfunction. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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Specification