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| 국가/구분 | United States(US) Patent 등록 |
|---|---|
| 국제특허분류(IPC7판) |
|
| 출원번호 | US-0073180 (1993-06-08) |
| 발명자 / 주소 |
|
| 출원인 / 주소 |
|
| 인용정보 | 피인용 횟수 : 592 인용 특허 : 0 |
A biosensing meter receives a sample strip that includes electrically isolated sense and excitation electrodes bridged by a reaction zone. When a drop of biological sample fluid is placed in the reaction zone, a plurality of fail/safe tests are performed. A drop size test is performed by a circuit t
A biosensing meter receives a sample strip that includes electrically isolated sense and excitation electrodes bridged by a reaction zone. When a drop of biological sample fluid is placed in the reaction zone, a plurality of fail/safe tests are performed. A drop size test is performed by a circuit that detects the size of the drop placed in the reaction zone. The circuit both detects that a drop has been placed in the reaction zone and further measures a test current level, after a delay, to determine that the drop size is sufficient to enable hydration of reactants in the reaction zone. Subsequently, during the reaction, a “delta”current change is measured at succeeding sample time. This test measures the difference between succeeding current samples during a measurement time. If each succeeding sample is not less than preceding sample by a delta value, a determination is made that the current is not monotonically decreasing and the test is aborted. At the termination of the measurement time, a current sum test is performed wherein a processor calculates a linear sum of all sample test currents and calculates a ratio between that sum and the last current sample. If that ratio matches a pre-calculated constant for the Cottrell relationship, then it is known that the measurement values exhibit the Cottrell relationship.
A biosensing meter for receiving a sample strip that includes electrically isolated excitation and sense electrodes and a sample well bridging thereacross, with an analyte reactant resident therein, said biosensing meter comprising: excitation supply means for applying an excitation potential to sai
A biosensing meter for receiving a sample strip that includes electrically isolated excitation and sense electrodes and a sample well bridging thereacross, with an analyte reactant resident therein, said biosensing meter comprising: excitation supply means for applying an excitation potential to said excitation electrode; sense amplifier means connected to said sense electrode for producing an output signal when a volume of a biological fluid is placed in said sample well and creates a current path between said excitation and sense electrode; processor means coupled to said sense amplifier means for first, testing if said output signal exceeds a first threshold value and second, testing if said output signal thereafter exceeds a second, larger threshold value, an output signal that exceeds said first threshold value recognized as an indication of said volume in said sample cell, an output signal that exceeds said second larger threshold recognized as an indication that said volume will enable a subsequent determination to be made for an analyte in said biological fluid, said processor means only enabling said subsequent determination after said second, larger threshold has been exceeded by said output signal.
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