Fail judging method and analyzer
First Claim
1. A fail judging method for determining properness or improperness of a sensor used for analysis of a sample, the analysis comprising:
- introducing the sample to a reagent layer of the sensor;
applying a voltage to the reagent layer and the sample via a pair of electrodes;
measuring current between the electrodes;
setting a reference time point as a time point when the current reaches a predetermined threshold for detection of the introduction of the sample; and
obtaining an analysis result based on current measured after the reference time point;
wherein the method comprises;
observing change of the current before and after the reference time point; and
determining that the sensor is improper when the change in current before the reference time point or the change in current after the reference time point differs from a predetermined change before the reference time point or a predetermined change after the reference time point, respectively.
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Accused Products
Abstract
An analyzer (A) includes a current measurer (42) for measuring the current flowing between paired electrodes (22a), (22b) when a sample is introduced to the reagent layer (23) of a sensor (2) and voltage is applied across the electrodes, while also including a processor (3) for analyzing the sample based on the current after a predetermined reference time point. The analyzer (A) further includes a fail determiner (44) which monitors the change of the current before and after the reference time point and determines that the sensor (2) is improper when the current change does not correspond to a predetermined current change.
23 Citations
8 Claims
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1. A fail judging method for determining properness or improperness of a sensor used for analysis of a sample, the analysis comprising:
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introducing the sample to a reagent layer of the sensor; applying a voltage to the reagent layer and the sample via a pair of electrodes; measuring current between the electrodes; setting a reference time point as a time point when the current reaches a predetermined threshold for detection of the introduction of the sample; and obtaining an analysis result based on current measured after the reference time point; wherein the method comprises; observing change of the current before and after the reference time point; and determining that the sensor is improper when the change in current before the reference time point or the change in current after the reference time point differs from a predetermined change before the reference time point or a predetermined change after the reference time point, respectively. - View Dependent Claims (2, 3, 4, 5)
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6. An analyzer comprising:
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a sensor mount portion for mounting a sensor which includes a reagent layer to which a sample is introduced and a pair of electrodes for applying voltage to the reagent layer; a current measurer for measuring current between the electrodes when voltage is applied across the electrodes; and a processor adapted for analyzing the sample based on current after a reference time point which is preset for a time point when the current measured by the current measurer reaches a predetermined threshold for detection of the introduction of the sample; wherein the analyzer comprises a fail determiner adapted for monitoring change of the current before and after the reference time point and for determining that the sensor is improper when the change in current before the reference time point or the change in current after the reference time point differs from a predetermined change before the reference time point or a predetermined change after the reference time point, respectively. - View Dependent Claims (7, 8)
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Specification