JP2002514744A5 - - Google Patents

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JP2002514744A5
JP2002514744A5 JP2000548500A JP2000548500A JP2002514744A5 JP 2002514744 A5 JP2002514744 A5 JP 2002514744A5 JP 2000548500 A JP2000548500 A JP 2000548500A JP 2000548500 A JP2000548500 A JP 2000548500A JP 2002514744 A5 JP2002514744 A5 JP 2002514744A5
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electrode
strip
analyte
resistance
dummy
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JP4439733B2 (ja
JP2002514744A (ja
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ディスポーザブル試験ストリップを用いる電流測定法によるヒト血液などの複合液状媒体中のグルコースなどの分析物の測定は幅広く用いられるようになり、現在では多数の製品に用いられている。ある種の構造において、一つの電極が擬似基準/対電極として働き、基準電位差を確立する三電極システムを用いることにより信号対雑音比を改善することは有利である。典型的には、これは銀/塩化銀電極である。第二の作用電極は意図する分析物との酸化または還元反応を促進する酵素および酵素と電極の間で電子を伝達する化学伝達物質で被覆される。第三の「ダミー」電極は化学伝達物質で被覆されるが酵素では被覆されず、また目的分析物を含む酸化還元反応以外から発生する一定量の電流を提供する。こうしたシステムの例は、Carterらの米国特許第5,628,980号(本明細書中に参照により援用される)に記載されており、MediSense QIDグルコースメーターに利用されている。
従って、コストが二電極試験ストリップに匹敵し、しかもなお二電極試験ストリップの場合とほぼ同じ安定性の擬似基準/対電極を有する電流測定システムにおいて用いるための三電極ディスポーザブル試験ストリップが必要である。
三電極システムを用いた電流測定において用いるためのディスポーザブル試験ストリップにおいて擬似基準/対電極上の電流負荷を低減させ、従って、ダミー電極の抵抗を増大させることにより、この半電池電位をより良好に安定化することができることを発見した。これにより三電極試験ストリップは用いられるメーターの操作性を変えることなくより良好な性能を提供することができる。
ダミー電極の活性電極面を用いて連続して抵抗をかけることによって、この電極の抵抗を増大させることも好ましい。従って、ダミー電極の活性面の面積および性質の両方が作用電極のものと類似または同一に保持される。これは、電圧をかけ、得られる電流を測定するメーターに活性電極表面を接続する導電路の抵抗を増大させることによって容易に達成することができる。分析物電流測定用の典型的なディスポーザブルストリップでは、三つの電極表面が細長い平坦なストリップの一方の端に存在し、三つの接触パッド(各電極表面に対して一つ)がこのストリップの他方の端に存在する。各電極表面は導電路によってその電極の接触パッドに接続される。接触パッドは、ストリップと電圧をかけ、得られる電流を測定するメーターとの間の電気的な接触を確立するための手段として役立つ。導電路は典型的には絶縁層によって被覆され、それらの間の一切のショートを防止する。
複合液状媒体中の分析物の電流測定用の三電極ディスポーザブル試験ストリップは、ダミー電極、すなわち、作用電極において利用される電気化学伝達物質を保持するが、酵素、または分析物を酸化還元反応させるために選択されたその他の作用物質を有さない電極の抵抗を増大させることにより、基準/対電極上に過剰な電流負荷を負わせることなく、信号対雑音比を改善するために最適化されている。この概念を適用するための典型的な環境は、全血サンプル中のグルコースの測定に関する米国特許第5,628,890号に記載の三電極試験ストリップである。
JP2000548500A 1998-05-08 1999-05-06 試験ストリップ Expired - Lifetime JP4439733B2 (ja)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
GB9809963A GB2337122B (en) 1998-05-08 1998-05-08 Test strip
GB9809963.3 1998-05-08
PCT/GB1999/001424 WO1999058709A1 (en) 1998-05-08 1999-05-06 Test strip

Publications (3)

Publication Number Publication Date
JP2002514744A JP2002514744A (ja) 2002-05-21
JP2002514744A5 true JP2002514744A5 (ja) 2009-10-08
JP4439733B2 JP4439733B2 (ja) 2010-03-24

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JP2000548500A Expired - Lifetime JP4439733B2 (ja) 1998-05-08 1999-05-06 試験ストリップ

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US (1) US6540891B1 (ja)
EP (1) EP1075538A1 (ja)
JP (1) JP4439733B2 (ja)
AR (2) AR015075A1 (ja)
AU (1) AU758617B2 (ja)
BR (1) BR9910284A (ja)
CA (1) CA2331824A1 (ja)
CO (1) CO4890893A1 (ja)
GB (1) GB2337122B (ja)
WO (1) WO1999058709A1 (ja)

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