Rapid-Read Gated Amperometry Devices
First Claim
1. A handheld measurement device, comprising:
- a sensor interface adapted to receive a sensor strip, the sensor interface including at least two contacts;
at least one display; and
electronic circuitry establishing electrical communication between the at least two contacts and the display,where the electronic circuitry includes a signal generator and a processor in electrical communication,where the processor is in electrical communication with a storage medium having computer readable software code,where the processor is operable to cause the signal generator to provide an input signal between the at least two contacts,where the input signal has at least 3 duty cycles within 10 seconds, where each of the at least 3 duty cycles includes an excitation pulse and a relaxation,where the processor is operable to measure at least one current value at the at least two contacts within 300 milliseconds of the signal generator applying the excitation pulse of at least one duty cycle of the at least 3 duty cycles, andwhere the processor is operable to determine an analyte concentration in a biological fluid or a derivative of a biological fluid in response to the at least one current value.
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Accused Products
Abstract
A sensor system, device, and methods for determining the concentration of an analyte in a sample is described. Input signals including multiple duty cycles of sequential excitation pulses and relaxations are input to the sample. One or more signals output from the sample within 300 ms of the input of an excitation pulse may be correlated with the analyte concentration of the sample to improve the accuracy and/or precision of the analysis. Determining the analyte concentration of the sample from these rapidly measured output values may reduce analysis errors arising from the hematocrit effect, mediator background, and other error sources.
4 Citations
28 Claims
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1. A handheld measurement device, comprising:
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a sensor interface adapted to receive a sensor strip, the sensor interface including at least two contacts; at least one display; and electronic circuitry establishing electrical communication between the at least two contacts and the display, where the electronic circuitry includes a signal generator and a processor in electrical communication, where the processor is in electrical communication with a storage medium having computer readable software code, where the processor is operable to cause the signal generator to provide an input signal between the at least two contacts, where the input signal has at least 3 duty cycles within 10 seconds, where each of the at least 3 duty cycles includes an excitation pulse and a relaxation, where the processor is operable to measure at least one current value at the at least two contacts within 300 milliseconds of the signal generator applying the excitation pulse of at least one duty cycle of the at least 3 duty cycles, and where the processor is operable to determine an analyte concentration in a biological fluid or a derivative of a biological fluid in response to the at least one current value. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26)
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27. A biosensor system, comprising:
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a sensor strip having a sample interface adjacent to a reservoir formed by the sensor strip; and a measurement device having a processor connected to a sensor interface, where the sensor interface has electrical communication with the sample interface, where the processor has electrical communication with a storage medium, where the processor determines an output signal value responsive to the concentration of an analyte in a sample from the sensor interface within 300 milliseconds of applying an excitation pulse to the sample interface, where the excitation pulse is part of an input signal having at least 3 duty cycles within 10 seconds, where each duty cycle includes an excitation pulse and a relaxation.
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28-39. -39. (canceled)
Specification