JP5153875B2 - 電気化学インピーダンス分光法によって検出されるセンサ誤動作に対処するための方法およびシステム - Google Patents
電気化学インピーダンス分光法によって検出されるセンサ誤動作に対処するための方法およびシステム Download PDFInfo
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/145—Measuring characteristics of blood in vivo, e.g. gas concentration or pH-value ; Measuring characteristics of body fluids or tissues, e.g. interstitial fluid or cerebral tissue
- A61B5/1468—Measuring characteristics of blood in vivo, e.g. gas concentration or pH-value ; Measuring characteristics of body fluids or tissues, e.g. interstitial fluid or cerebral tissue using chemical or electrochemical methods, e.g. by polarographic means
- A61B5/1486—Measuring characteristics of blood in vivo, e.g. gas concentration or pH-value ; Measuring characteristics of body fluids or tissues, e.g. interstitial fluid or cerebral tissue using chemical or electrochemical methods, e.g. by polarographic means using enzyme electrodes, e.g. with immobilised oxidase
- A61B5/14865—Measuring characteristics of blood in vivo, e.g. gas concentration or pH-value ; Measuring characteristics of body fluids or tissues, e.g. interstitial fluid or cerebral tissue using chemical or electrochemical methods, e.g. by polarographic means using enzyme electrodes, e.g. with immobilised oxidase invasive, e.g. introduced into the body by a catheter or needle or using implanted sensors
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/145—Measuring characteristics of blood in vivo, e.g. gas concentration or pH-value ; Measuring characteristics of body fluids or tissues, e.g. interstitial fluid or cerebral tissue
- A61B5/14532—Measuring characteristics of blood in vivo, e.g. gas concentration or pH-value ; Measuring characteristics of body fluids or tissues, e.g. interstitial fluid or cerebral tissue for measuring glucose, e.g. by tissue impedance measurement
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/145—Measuring characteristics of blood in vivo, e.g. gas concentration or pH-value ; Measuring characteristics of body fluids or tissues, e.g. interstitial fluid or cerebral tissue
- A61B5/1495—Calibrating or testing of in-vivo probes
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
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- A61M2230/00—Measuring parameters of the user
- A61M2230/20—Blood composition characteristics
- A61M2230/201—Glucose concentration
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
- A61M5/14—Infusion devices, e.g. infusing by gravity; Blood infusion; Accessories therefor
- A61M5/168—Means for controlling media flow to the body or for metering media to the body, e.g. drip meters, counters ; Monitoring media flow to the body
- A61M5/172—Means for controlling media flow to the body or for metering media to the body, e.g. drip meters, counters ; Monitoring media flow to the body electrical or electronic
- A61M5/1723—Means for controlling media flow to the body or for metering media to the body, e.g. drip meters, counters ; Monitoring media flow to the body electrical or electronic using feedback of body parameters, e.g. blood-sugar, pressure
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- Measurement Of The Respiration, Hearing Ability, Form, And Blood Characteristics Of Living Organisms (AREA)
Description
Claims (15)
- 作用電極および基準電極を有するセンサを実時間で保守する方法であって、
前記センサの寿命の間、センサインピーダンス値を引き出すために前記作用電極と前記基準電極の間に電位差を印加して診断電気化学インピーダンス分光法(EIS)手順を実行するステップと、
前記センサインピーダンス値と、上側および下側の閾値を有する予め設定された限界とを比較することによって前記センサが正常に動作しているかどうかを決定するステップと、
前記センサインピーダンス値が前記上側の閾値より大きく、したがって前記限界外である場合、センサ電流を回復するステップと
を含み、前記センサ電流を回復するステップは、診断電気化学インピーダンス分光法(EIS)手順の実行の際に前記作用電極と前記基準電極の間に印加する前記電位差とは逆極性の直流電圧を前記作用電極と前記基準電極の間に印加するステップを含むことを特徴とする方法。 - 請求項1に記載の方法であって、前記センサの寿命の間、周期的に診断EIS手順が実行されることを特徴とする方法。
- 請求項1に記載の方法であって、前記センサインピーダンス値が前記上側の閾値より大きいかあるいは、前記下側の閾値より小さい場合に、診断EIS手順がトリガされることを特徴とする方法。
- 請求項1に記載の方法であって、前記センサ電流を回復するステップが、交流電圧に結合された前記直流電圧を印加することを含むことを特徴とする方法。
- 請求項1に記載の方法であって、
前記センサ電流を回復するステップが適用された後の前記センサインピーダンス値を決定するために追加診断EIS手順を実行するステップと、
前記センサインピーダンス値が前記限界内であるかどうかを決定するために、更新されたセンサインピーダンス値と前記限界とを比較するステップと
をさらに含むことを特徴とする方法。 - 請求項5に記載の方法であって、
前記更新されたセンサインピーダンス値が前記限界外である場合、前記センサの使用を終結するステップ
をさらに含むことを特徴とする方法。 - 請求項5に記載の方法であって、
前記更新されたセンサインピーダンス値が前記限界外である場合、前記センサを較正するようにユーザに要求するメッセージを生成するステップ
をさらに含むことを特徴とする方法。 - 請求項5に記載の方法であって、
既に実施済みの先行する前記センサ電流を回復するステップが部分的にうまくいったが、依然としてインピーダンス値が前記限界外であることをインピーダンス値が示している場合、待機し、もう一度前記センサ電流を回復するステップを実行すること、をさらに含むことを特徴とする方法。 - 作用電極および基準電極を有するセンサを実時間で保守するシステムであって、
センサの寿命の間、センサインピーダンス値を引き出すために前記作用電極と前記基準電極の間に電位差を印加して診断電気化学インピーダンス分光法(EIS)手順を実行するための手段と、
前記センサインピーダンス値と、上側および下側の閾値を有する予め設定された限界とを比較することによって前記センサが正常に動作しているかどうかを決定するための手段と、
前記センサインピーダンス値が前記上側の閾値より大きく、したがって前記限界外である場合、センサ電流を回復する手段と
を備え、前記センサ電流を回復する手段は、診断電気化学インピーダンス分光法(EIS)手順の実行の際に前記作用電極と前記基準電極の間に印加する前記電位差とは逆極性の直流電圧を前記作用電極と前記基準電極の間に印加する手段を含むことを特徴とするシステム。 - 請求項9に記載のシステムであって、前記センサの寿命の間、周期的に診断EIS手順が実行されることを特徴とするシステム。
- 請求項9に記載のシステムであって、前記センサインピーダンス値が前記上側の閾値より大きいかあるいは、前記下側の閾値より小さい場合に、診断EIS手順がトリガされることを特徴とするシステム。
- 請求項9に記載のシステムであって、前記センサ電流を回復する手段が、交流電圧に結合された逆直流電圧を印加することを特徴とするシステム。
- 請求項9に記載のシステムであって、
前記センサ電流を回復する手段が適用された後の前記センサインピーダンス値を決定するために追加診断EIS手順を実行するための手段と、
前記センサインピーダンス値が前記限界内であるかどうかを決定するために、更新されたセンサインピーダンス値と前記限界とを比較するための手段と
をさらに備えたことを特徴とするシステム。 - 請求項13に記載のシステムであって、
前記更新されたセンサインピーダンス値が前記限界外である場合、前記センサの使用を終結するための手段
をさらに備えたことを特徴とするシステム。 - 請求項13に記載のシステムであって、
前記更新されたセンサインピーダンス値が前記限界外である場合、前記センサを較正するようにユーザに要求するメッセージを生成するための手段
をさらに備えたことを特徴とするシステム。
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
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US11/842,825 US8114268B2 (en) | 2005-12-30 | 2007-08-21 | Method and system for remedying sensor malfunctions detected by electrochemical impedance spectroscopy |
US11/842,825 | 2007-08-21 | ||
PCT/US2008/073493 WO2009026236A1 (en) | 2007-08-21 | 2008-08-18 | Method and system for remedying sensor malfunctions detected by electrochemical impedance spectroscopy |
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JP2010537198A JP2010537198A (ja) | 2010-12-02 |
JP5153875B2 true JP5153875B2 (ja) | 2013-02-27 |
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JP2010521969A Expired - Fee Related JP5153875B2 (ja) | 2007-08-21 | 2008-08-18 | 電気化学インピーダンス分光法によって検出されるセンサ誤動作に対処するための方法およびシステム |
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US (1) | US8114268B2 (ja) |
EP (1) | EP2185923B1 (ja) |
JP (1) | JP5153875B2 (ja) |
CA (1) | CA2696230C (ja) |
DK (1) | DK2185923T3 (ja) |
WO (1) | WO2009026236A1 (ja) |
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US7985330B2 (en) * | 2005-12-30 | 2011-07-26 | Medtronic Minimed, Inc. | Method and system for detecting age, hydration, and functional states of sensors using electrochemical impedance spectroscopy |
US8114269B2 (en) * | 2005-12-30 | 2012-02-14 | Medtronic Minimed, Inc. | System and method for determining the point of hydration and proper time to apply potential to a glucose sensor |
US8114268B2 (en) | 2005-12-30 | 2012-02-14 | Medtronic Minimed, Inc. | Method and system for remedying sensor malfunctions detected by electrochemical impedance spectroscopy |
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CA2696230A1 (en) | 2009-02-26 |
EP2185923A1 (en) | 2010-05-19 |
EP2185923B1 (en) | 2012-12-12 |
US20080000779A1 (en) | 2008-01-03 |
JP2010537198A (ja) | 2010-12-02 |
CA2696230C (en) | 2016-05-17 |
WO2009026236A1 (en) | 2009-02-26 |
US8114268B2 (en) | 2012-02-14 |
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