Method for operating measuring meter and measuring meter

• US 8,236,165 B2
• Filed: 05/02/2007
• Issued: 08/07/2012
• Est. Priority Date: 05/24/2006
• Status: Active Grant

• Current Assignee: Bionime Corporation
• Original Assignee: Bionime Corporation
• Inventors: Huang, Chun-Mu
• Primary Examiner(s): Barton, Jeffrey T
• Assistant Examiner(s): DIETERLE, JENNIFER M
• Application Number:
  US11/799,855
• Publication Number:
  US 20070272564A1
• Time in Patent Office: 1,924 Days
• Field of Search: 20440301-40315, 205/775, 205/792, 205/777.5, 205/778, 600345-348, 422/82.01, 422/82.02
• US Class Current: 205/792
• CPC Class Codes: G01N 27/3273 Devices therefor, e.g. test element readers, circuitry details not specific to biochemical electrodes G01N33/4875

Abstract

A method for operating a measuring meter for an electrochemical test strip is provided. The method comprises steps of applying a voltage to electrodes of the test strip at least during one of a sample presence detection period and an incubation period; and repeatedly increasing and decreasing the voltage during at least one of the sample presence detection period and the incubation period.

Claims

1. A method for operating a measuring meter for an electrochemical test strip, comprising steps of:

providing a series of pulse voltages to electrodes of the test strip during both a sample presence detection period and an incubation period, wherein a duration of pulses during the sample presence detection period is from 10 μ

s to 300 μ

s, a duration between successive pulses is from 10 ms to 50 ms, a maximum value of the series of pulse voltages provided during the incubation period is sufficiently high to oxidize a reduced form of a mediator M_(RED) in a reagent of the test strip into its oxidised form M_(OX), and sufficiently low so as to avoid an oxidation of an H₂O₂ in the reagent; and

providing a fixed voltage to electrodes of the test strip during a measurement period.

2. A method according to claim 1, wherein the voltage is provided in a regular pattern with one of a predetermined and a predeterminable frequencies and with a maximum value which is constant during at least one of the periods.

3. A method according to claim 1, wherein a minimum value of the series of pulse voltages between two successive pulses is 0 Volt.

4. A method according to claim 1, wherein a minimum value of the pulse voltage between two successive pulses is larger than 0 Volt, but less than 0.1 Volt.

5. A method according to claim 1, wherein a duration between two successive pulses is operated by an open circuit.

6. A method according to claim 1, wherein a duration of pulses during the sample presence detection period is 100 μ

s, and a duration between successive pulses is 20 ms.

7. A method according to claim 1, wherein a duration of pulses during the incubation period is from 10 μ

s to 1 ms, and a duration between successive pulses is from 10 ms to 300 ms.

8. A method according to claim 1, wherein a duration of pulses during the incubation period is 100 μ

s, and a duration between successive pulses is 200 ms.

9. A method according to claim 1, wherein a maximum value of the series of pulse voltages provided during the sample presence detection period is sufficient for creating a measurable current between the electrodes when a sample is present.

10. A method according to claim 1, further comprising a step of limiting a flowing current between the electrodes during the incubation period.

11. A method according to claim 1, wherein a maximum value of the series of pulse voltages between two successive pulses is larger than 0.1 Volt, but less than 0.6 Volt.

12. A method for operating a measuring meter for an electrochemical test strip, comprising steps of:

providing a series of pulse voltages to electrodes of the test strip during a sample presence detection period, wherein a duration of pulses during the sample presence detection period is from 10 μ

s to 300 μ

s, a duration between successive pulses is from 10 ms to 50 ms; and

providing a first fixed voltage to the electrodes of the test strip during an incubation period, wherein the first fixed voltage provided during the incubation period is in a range between being sufficiently high to oxidize a reduced form of a mediator M_(RED) in a reagent of the test strip into its oxidised form M_(OX) and being sufficiently low so as to avoid an oxidation of an H₂O₂ in the reagent.

13. A method according to claim 12, further comprising a step of providing a second fixed voltage to the electrodes of the test strip during a measurement period, wherein the first fixed voltage is lower than the second fixed voltage.

14. A measuring meter for an electrochemical test strip, comprising:

a voltage providing device programmed to provide a series of pulse voltages to electrodes of the test strip during both a sample presence detection period and an incubation period, and provide a fixed voltage to electrodes of the test strip during a measurement period, wherein a duration of pulses during the sample presence detection period is provided from 10 μ

s to 300 μ

s, a duration between successive pulses is provided from 10 ms to 50 ms, the series of pulse voltages provided by the voltage providing device during the incubation period have a maximum value being sufficiently high to oxidize a reduced form of a mediator M_(RED) in a reagent of the test strip into its oxidised form M_(OX), and sufficiently low so as to avoid an oxidation of an H₂O₂ in the reagent; and

a limiting device limiting a current flow between the electrodes during the incubation period, wherein the limiting device is formed by at least two resistors which are selectively connected to an entry of an operational amplifier of a current to voltage converter, and each of the resistors is connected with a switch in series to switch on/off the resistors respectively.

15. A measuring meter according to claim 14, wherein the voltage providing device provides the voltage in a regular pattern with one of a predetermined and a predeterminable frequencies.

16. A measuring meter according to claim 14, wherein the pulse voltage providing device provides the voltage being 0 Volt between two successive pulses.

17. A measuring meter according to claim 14, wherein the pulse voltage providing device provides the voltage being larger than 0 Volt but less than 0.1 Volt between two successive pulses.

18. A measuring meter according to claim 14, wherein the pulse voltage providing device provides the voltage consisting of pulses with a duration thereof being 100 μ

s, and a duration between the successive pulses is 20 ms during the sample presence detection period.

19. A measuring meter according to claim 14, wherein the pulse voltage providing device provides the voltage consisting of pulses with a duration thereof being 10 μ

s to 1 ms, and a duration between the successive pulses is 10 ms to 300 ms during the incubation period.

20. A measuring meter according to claim 14, wherein the pulse voltage providing device provides the voltage consisting of pulses with a duration thereof being 100 μ

s, and a duration between the successive pulses is 200 ms during the incubation period.

21. A measuring meter according to claim 14, wherein the series of pulse voltages provided by the voltage providing device during the sample presence detection period are sufficient for creating a measurable current between the electrodes when a sample is present.