JP2005524463A - リアルタイム自動調整キャリブレーション用アルゴリズム - Google Patents
リアルタイム自動調整キャリブレーション用アルゴリズム Download PDFInfo
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- WQZGKKKJIJFFOK-GASJEMHNSA-N Glucose Natural products OC[C@H]1OC(O)[C@H](O)[C@@H](O)[C@@H]1O WQZGKKKJIJFFOK-GASJEMHNSA-N 0.000 claims abstract description 362
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- A61B5/1486—Measuring characteristics of blood in vivo, e.g. gas concentration, pH value; Measuring characteristics of body fluids or tissues, e.g. interstitial fluid, cerebral tissue using enzyme electrodes, e.g. with immobilised oxidase
- A61B5/14865—Measuring characteristics of blood in vivo, e.g. gas concentration, pH value; Measuring characteristics of body fluids or tissues, e.g. interstitial fluid, cerebral tissue 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
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- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/145—Measuring characteristics of blood in vivo, e.g. gas concentration, pH value; Measuring characteristics of body fluids or tissues, e.g. interstitial fluid, cerebral tissue
- A61B5/14532—Measuring characteristics of blood in vivo, e.g. gas concentration, pH value; Measuring characteristics of body fluids or tissues, e.g. interstitial fluid, cerebral tissue for measuring glucose, e.g. by tissue impedance measurement
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- A61B5/1495—Calibrating or testing of in-vivo probes
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- A61B5/6847—Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient specially adapted to be brought in contact with an internal body part, i.e. invasive mounted on an invasive device
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- A—HUMAN NECESSITIES
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- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/68—Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient
- A61B5/6846—Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient specially adapted to be brought in contact with an internal body part, i.e. invasive
- A61B5/6847—Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient specially adapted to be brought in contact with an internal body part, i.e. invasive mounted on an invasive device
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- A61B5/6849—Needles in combination with a needle set
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- A—HUMAN NECESSITIES
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- 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
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- A61M5/14—Infusion devices, e.g. infusing by gravity; Blood infusion; Accessories therefor
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- 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
- A61M2005/1726—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 the body parameters being measured at, or proximate to, the infusion site
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Abstract
Description
26.0 + 26.0 * 0.02 = 26.5 ナノアンペア
同様に、最小クリッピング限界514は、前のインターバル値510よりも2%小さく、次の式のようになる。
26.0 - 26.0 * 0.02 = 25.5 ナノアンペア
現在の25.0ナノアンペアのインターバル値508は25.5ナノアンペアという最小クリッピング限界514よりも小さいため、それは切り取られて、メモリ記憶値を計算するには25.5ナノアンペアが25.0ナノアンペアに代わって使用される。さらに説明を加えると、図8は、サンプル値N〜Qを平均することによって計算されたインターバル値R’が、前のインターバル値L’から得られたクリッピング限界412及び414の外側にあることを示す。このため、インターバル値R’の大きさはメモリ値AD”を計算するためには使用されず、その代わり最小クリッピング限界414の大きさであるR”が使用される。
SPSR=血糖の基準読取り値/有効ISIG
ここで、SPSR=単一点感度比である。
このため、較正された血糖レベルは下記のようになる。
血糖レベル=有効ISIG * SPSR
一例として、図12に示した対のキャリブレーションデータ点から20.1ナノアンペア及び102mg/dlの値を使用すると、SPSRのキャリブレーションは下記のようになる。
SPSR= 102 / 20.1 = 5.07 mg/dl/ナノアンペア
例の説明を続ける。キャリブレーションが完了すると、グルコースセンサの読取り値が15.0ナノアンペアの場合、計算された血糖レベルは下記のようになる。
血糖レベル= 15.0 * 5.07 = 76.1 mg/dl
MSPSR=血糖の基準読取り値/(有効ISIG−オフセット)
これにより、較正された血糖レベルは下記のようになる。
血糖レベル=(有効ISIG−オフセット) * MSPSR
上記の例の説明を続けると、SPSRは7よりも小さい5.07であるため、感度比はMSPSRを用いて下記のように再計算される。
MSPSR= 102 / (20.1 - 3) = 5.96 mg/dl/ナノアンペア
また、キャリブレーション後の15.0ナノアンペアのグルコースセンサの読取り値を考えると、計算された血糖レベルは下記のようになる。
血糖レベル= (15.0 - 3) * 5.96 = 71.5 mg/dl
血糖レベル=有効ISIG * MSPSR
SPSR<4の場合、オフセット値5を使用する、それ以外の場合は、
4<=SPSR<7の場合、オフセット値3を使用する、それ以外の場合は、
SPSR>=7の場合、オフセット値0を使用する
Yiは対のキャリブレーションデータ点のi番目の血糖の基準読取り値であり、
Nはキャリブレーションに使用される対のキャリブレーションデータ点の総数である。
iは、特定の対のキャリブレーションデータ点の識別番号である。
これにより、較正された血糖レベルは、下記のようになる。
血糖レベル=有効ISIG * LRSR
この線形回帰法はゼロの固定インターセプト(換言すると、有効ISIGが0の場合、血糖値は0になる)を使用し、このため、線形回帰法はただ1つの回帰パラメータ、すなわち勾配、を評価することに注意されたい。別の実施形態では、オフセット値などの別の回帰パラメータを評価する、別の線形回帰法を使用することができる。
血糖レベル=(有効ISIG−オフセット値) * MLRSR
Abs (1-PES/CFc) * 100 = しきい値1、及び
Abs (CFc-PES) * Isig = しきい値2
百分率及び/又は絶対的な差がしきい値1及び/又はしきい値2(一括して「基準2a」と呼ぶ)を超える場合、リコール変数(ブロック1220における)により、ブロック1040でセンサ終了をトリガするメッセージ(リコール変数がブロック1220でFAILC1又はFAILC2に等しい場合)又はブロック1230のキャリブレーションエラー用警報(リコール変数がブロック1220でNOFAILに等しい場合)のいずれかが発生する。キャリブレーションエラー用警報がブロック1230で発生する場合、リコール変数はFAILC2に設定され、現在のメータ血糖読取り値はMBGp(以前のメータ血糖値)として記憶され、また他の血糖基準値が要求されて、ブロック1000においてグルコースモニタ100に(MBGcとして)入力される。新しいメータ血糖読取り値を要求することによって、ブロック1230で記憶された最後のメータ血糖読取り値とブロック1000で入力された新しいメータ血糖読取り値との間の比較を行い、センサの故障が存在したかどうかを判断することができる。この論理は、ブロック1000の後で論理がブロック1200に到達するまでの、前述した同じ経路をたどる。ブロック1200において、リコール変数が現在はブロック1230でFAILC2に設定されているため、FAILC2の警報を発生した以前のキャリブレーションチェック値(CFp)と現在のキャリブレーションチェック値(CFc)との間の差がブロック1300で求められる。好ましい実施形態では、百分率(しきい値1)及びmg/dl(しきい値2)についての、以前のキャリブレーションチェック値と現在のキャリブレーションチェック値との間の差が求められる。さらに、CFpとCFc(一括して「基準2b」と呼ぶ)との間に方向変化があったかどうかに対するチェックが行われる。基準2bの実施例は下記のようになる。
Abs (1 - CFp/CFc) * 100 = しきい値1、及び
Abs (CFc - CFp) * Isig = しきい値2、及び
(CFp - PES) * (CFc - CFp) > 0
百分率及び絶対的な差がしきい値1及びしきい値2を超えて、かつ第2の血糖メータの読取り値に関する勾配において方向変化がない場合は、センサの終了メッセージがブロック1040でトリガされる。基準2bが満足される場合、論理はブロック1310に進む。ブロック1310において、論理は以前の値と現在の値との間の差がセンサの感度の変化によるものであったのか又は読取り値は単にノイズによるものであるのかどうかについて判断する。好ましい実施形態では、ノイズに対して感度の変化についての決定が基準3bを用いて行われる。基準3bにより、(以前の推定勾配(PES)及び現在のキャリブレーションチェック値(CFc))と(現在のキャリブレーションチェック値(CFc)に対する以前のキャリブレーションチェック値(CFp))との間の差が、ブロック1420で比較される。例えば、下記のようになる
Abs(PES - CFc) < Abs(CFp - CFc)
Abs(1 - PES/CFc) * 100 < しきい値3、及び
Abs(CFc - PES) * ISIG < しきい値4
この場合もやはり、特定のセンサの特性に基づいて、しきい値3及び4を決定できる。PESとCFcとの間の百分率及び/又は絶対的な差が、ブロック1410においてしきい値3及び/又はしきい値4よりも小さい(すなわち、基準4が適合される)場合、勾配計算はブロック1430で新しいMBGc及び対のISIG値により簡単に更新することができ、ブロック1130でセンサの読取り値の解釈に適用できる。
Abs(PES - CFp) < Abs(CFc - CFp)
図18aで分かるように、推定勾配(PES)と以前のキャリブレーションチェック値(CFp)との間の差が、現在のキャリブレーションチェック値(CFc)と以前のキャリブレーションチェック値(CFp)との間の差よりも小さい場合、基準3aは適合されて、CFcに対する推定値と実際の値との間のエラーは以前のキャリブレーションにおけるノイズか、又は次のキャリブレーションを行う場合に取り上げられるセンサの感度の変化の始まりによるものであったことを示す。次に、勾配計算は、ブロック1430において、新しい対の血糖入力(MBGc)で簡単に更新され、ブロック1130でセンサの読取り値の解釈に適用される。
上記の説明は好ましい実施形態の中で主要なキャリブレーション技術を述べたが、多くの変更を上述したキャリブレーション技術に対して行うことができる。例えば、別の実施形態では、キャリブレーション係数を、各対のキャリブレーションデータ点に対するMSPSRを計算するために、最初に単一点技術を用いることによって、次に、経過時間の時間的な順序によって重み付けをしないで又は重み付けをして、それらを一緒に平均化することによって計算することができる。他の実施形態では、他の直線の曲線フィッティング技術を用いてSRとして使用される勾配を計算することができる。さらに別の実施形態では、他の非回帰曲線フィッティング技術を用いて、有効ISIGに関連した血糖レベルを表す式を生成することができる。これらの式は、多項式、放物線、双曲線、漸近線、対数方程式、指数関数、ガウス曲線などとすることができる。これらの実施形態では、SRは単一の値(勾配のような)ではなく、グルコースセンサ12からの有効ISIGをグルコースモニタ100又はポストプロセッサ200内で血糖値に変換するために使用される曲線を表す式である。さらに、勾配を近似するためにより強い式を使用する場合、古いISIGよりも最近のISIGを重み付けするように、異なるISIGに異なる重みを与えることができる。例えば、連続した8つのISIG(すなわち、n=8)がある場合、下記の式を利用できる。
フィルタ処理したISIG(i)=
連続した8つのISIGを利用できない場合(n<8)(すなわち、初期化の後又は送信時の三重スキップの後)、重み付けの式は下記のようになる。
フィルタ処理したISIG(i)=
一旦全ての対のメータBG/ISIG(対の重み)が重み付けられると、修正された回帰
式は勾配を生成する。好ましい別の実施形態では、ガウス関数
ガウス勾配
ここで、Tcは現在の時間、Tiは対のMBG/フィルタ処理されたISIG回数、及びσは15時間(又は180レコード、すなわちガウス形プロフィールの幅)である。
SR2 = (SR1 + SRday1) / 2
第3の感度比(SR3)は、SR2と第2のキャリブレーション(SRday2)からの対のキャリブレーションデータ点を用いて計算された感度比との平均である。この式は、下記のようになる。
SR3 = (SR2 + SRday2) / 2
次に来る日の感度比は、総称すると下記のように表される、同じフォーマットを使用する。
SRn= (SR(n-1) + SRday(n-1)) / 2
ここで、SRnは、リアルタイムでグルコースモニタ100によって使用される時間(n−1)から時間nの全体にわたって有効ISIGを血糖の読取り値に変換するまでのデータを用いて、時間nの始めに計算された新しい感度比である。
SR(n−1)は、時間(n−2)からのデータを用いて、時間n−1の始めに計算された以前の感度比である。
SRday(n−1)は、最後のキャリブレーション以来収集された対のキャリブレーションデータ点を用いて計算された感度比である。
Claims (39)
- 過去のキャリブレーションに基づいたキャリブレーション方式を使用してセンサのデータを解釈する、センサから収集されたセンサのデータを較正する方法であって、
前記センサに対するキャリブレーション用基準値を取得するステップと、
前記キャリブレーション用基準値と現在のセンサのデータ点とに基づいて現在のキャリブレーション係数を計算するステップと、
前記現在のキャリブレーション係数から起こり得るエラー又は前記センサ内の感度の変化のいずれかを識別するステップと、
センサの故障を確認するステップ又はセンサ感度内の変化を認識するステップと、
を含むことを特徴とする方法。 - 請求項1に記載の方法が、
前記センサの故障が確認されず、かつセンサ感度内の変化が認識されない場合、前記キャリブレーション方式を前記キャリブレーション用基準値により更新するステップと、
前記更新されたキャリブレーション方式を用いて、前記収集されたセンサのデータを解釈するステップと、
をさらに含むことを特徴とする方法。 - 請求項1に記載の方法であって、
前記センサの故障を確認するステップ又はセンサ感度内の変化を認識するステップが、
前記現在のキャリブレーション係数を前記キャリブレーション方式及び過去のキャリブレーション係数から判断された推定値と比較するステップと、
少なくとも2つの予期しないキャリブレーション係数が互いに関連することなく連続して受け取られた場合、センサの故障を確認するステップと、
をさらに含むことを特徴とする方法。 - 請求項3に記載の方法であって、
前記センサの故障を確認するステップ又はセンサ感度内の変化を認識するステップが、
予期しない過去のキャリブレーション係数がその後の現在のキャリブレーション係数によって連続して維持される場合、センサ感度内の変化を認識するステップと、
センサ感度内の変化が認識されると、前記キャリブレーション方式の計算を再開するステップと、
をさらに含むことを特徴とする方法。 - 請求項4に記載の方法が、
前記収集されたセンサのデータを前記再開されたキャリブレーション方式を用いて解釈するステップ、
をさらに含むことを特徴とする方法。 - 請求項4に記載の方法であって、
前記キャリブレーション方式の計算を再開するステップが、
人為的なキャリブレーション用基準値を作るステップと、
前記人為的なキャリブレーション用基準値、過去のキャリブレーション用基準値及び現在のキャリブレーション用基準値を用いて、前記キャリブレーション方式を作るステップと、
をさらに含むことを特徴とする方法。 - 請求項2に記載の方法であって、
前記キャリブレーション方式が修正された回帰法であることを特徴とする方法。 - 請求項7に記載の方法であって、
前記修正された回帰法がガウス型回帰法であることを特徴とする方法。 - 請求項7に記載の方法であって、
前記キャリブレーション方式が、最近のキャリブレーションがどのように実行されたかに基づいて過去のキャリブレーションを重み付けすることを特徴とする方法。 - 請求項2に記載の方法であって、
前記キャリブレーションが前記センサのデータを取得しながら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、
前記センサがグルコースセンサであ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、
前記現在のセンサのデータ点が、
時間の経過に対するセンサからの固有のセンサのデータを所定のレートでサンプリングするステップと、
前記サンプリングされた固有のセンサのデータから所定のメモリ記憶レートで少なくとも1つの現在のセンサのデータ点を導き出すステップと、
によって取得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、
前記現在のセンサのデータ点が、
センサの固有のデータをサンプリングするステップと、
所定のインターバルレートにわたってクリップ後のサンプリングされた固有のセンサのデータにクリッピング限界を適用し平均化することによって、インターバル値を引き出すステップと、
前記引き出されたインターバル値を所定のメモリ記憶レートで平均化することによって、少なくとも1つの前記現在のセンサのデータ点を引き出すステップと、
によって得られることを特徴とする方法。 - 過去のキャリブレーションに基づいたキャリブレーション方式を使用してセンサのデータを解釈する、センサから収集されたセンサのデータを較正する装置であって、
前記センサに対するキャリブレーション用基準値を取得する手段と、
前記キャリブレーション用基準値と現在のセンサのデータ点とに基づいて現在のキャリブレーション係数を計算する手段と、
前記現在のキャリブレーション係数から起こり得るエラー又はセンサ内の感度の変化のいずれかを識別する手段と、
センサの故障を確認する手段又はセンサ感度内の変化を認識する手段と、
を備えることを特徴とする装置。 - 請求項14に記載の装置が、
センサの故障が確認されず、かつセンサ感度内の変化が認識されない場合、前記キャリブレーション方式を前記キャリブレーション用基準値により更新する手段と、
前記更新されたキャリブレーション方式を用いて、収集されたセンサのデータを解釈する手段と、
をさらに備えることを特徴とする装置。 - 請求項14に記載の装置であって、
前記センサの故障を確認する手段又はセンサ感度内の変化を認識する手段が、
前記現在のキャリブレーション係数を前記キャリブレーション方式及び過去のキャリブレーション係数から判断された推定値と比較する手段と、
少なくとも2つの予期しないキャリブレーション係数が互いに関連することなく連続して受け取られた場合、センサの故障を確認する手段と、
をさらに備えることを特徴とする装置。 - 請求項16に記載の装置であって、
前記センサの故障を確認する手段又はセンサ感度内の変化を認識する手段が、
予期しない過去のキャリブレーション係数がその後の現在のキャリブレーション係数によって連続して維持される場合、センサ感度内の変化を認識する手段と、
センサ感度内の変化が認識されると、前記キャリブレーション方式の計算を再開する手段と、
をさらに備えることを特徴とする装置。 - 請求項17に記載の装置が、
前記収集されたセンサのデータを前記再開されたキャリブレーション方式を用いて解釈する手段をさらに備える、
ことを特徴とする装置。 - 請求項17に記載の装置であって、
前記キャリブレーション方式の計算を再開する手段が、
人為的なキャリブレーション用基準値を作る手段と、
前記人為的なキャリブレーション用基準値、過去のキャリブレーション用基準値及び現在のキャリブレーション用基準値を用いて、キャリブレーション方式を作る手段と、
をさらに備えることを特徴とする装置。 - 請求項15に記載の装置であって、
前記キャリブレーション方式が修正された回帰法であることを特徴とする装置。 - 請求項20に記載の装置であって、
前記修正された回帰法がガウス型回帰法であることを特徴とする装置。 - 請求項20に記載の装置であって、
前記キャリブレーション方式が、最近のキャリブレーションがどのように実行されたかに基づいて過去のキャリブレーションを重み付けすることを特徴とする装置。 - 請求項15に記載の装置であって、
前記キャリブレーションが前記センサのデータを取得しながら実行されることを特徴とする装置。 - 請求項14に記載の装置であって、
前記センサがグルコースセンサであることを特徴とする装置。 - 請求項14に記載の装置であって、
前記現在のセンサのデータ点が、
時間の経過に対するセンサからの固有のセンサのデータを所定のレートでサンプリングする手段と、
前記サンプリングされた固有のセンサのデータから所定のメモリ記憶レートで少なくとも1つの現在のセンサのデータ点を導き出す手段と、
によって取得されることを特徴とする装置。 - 請求項14に記載の装置であって、
前記現在のセンサのデータ点が、
センサの固有のデータをサンプリングする手段と、
所定のインターバルレートにわたってクリップ後のサンプリングされた固有のセンサのデータにクリッピング限界を適用し平均化することによって、インターバル値を引き出す手段と、
前記引き出されたインターバル値を所定のメモリ記憶レートで平均化することによって、少なくとも1つの前記現在のセンサのデータ点を引き出す手段と、
によって得られることを特徴とする装置。 - 過去のキャリブレーションに基づいたキャリブレーション方式がセンサのデータを解釈するために使用される、センサから収集されたセンサのデータを較正するためのコードを含む製品であって、
前記製品が、少なくとも1つの組み込まれたコンピュータプログラムを含む、コンピュータが利用可能な媒体を備え、
前記組み込まれたコンピュータプログラムが少なくとも1つのコンピュータに対して、
前記センサに対するキャリブレーション用基準値を取得することと、
前記キャリブレーション用基準値と現在のセンサのデータ点とに基づいて現在のキャリブレーション係数を計算することと、
前記現在のキャリブレーション係数から起こり得るエラー又はセンサ内の感度の変化のいずれかを識別することと、
センサの故障を確認すること又はセンサ感度内の変化を認識することと、
を実行可能にさせることを特徴とする製品。 - 請求項27に記載の製品が、
前記センサの故障が確認されず、かつセンサ感度内の変化が認識されない場合、前記キャリブレーション方式を前記キャリブレーション用基準値により更新することと、
前記更新されたキャリブレーション方式を用いて、前記収集されたセンサのデータを解釈することと、
をさらに実行することを特徴とする製品。 - 請求項27に記載の製品であって、
前記センサの故障を確認する又はセンサ感度内の変化を認識するステップが、
前記現在のキャリブレーション係数を前記キャリブレーション方式及び過去のキャリブレーション係数から判断された推定値と比較することと、
少なくとも2つの予期しないキャリブレーション係数が互いに関連することなく連続して受け取られた場合、センサの故障を確認することと、
をさらに実行することを特徴とする製品。 - 請求項29に記載の製品であって、
前記センサの故障を確認する又はセンサ感度内の変化を認識するステップが、
予期しない過去のキャリブレーション係数がその後の現在のキャリブレーション係数によって連続して維持される場合、センサ感度内の変化を認識することと、
センサ感度内の変化が認識されると、前記キャリブレーション方式の計算を再開することと、
をさらに実行することを特徴とする製品。 - 請求項30に記載の製品が、
前記収集されたセンサのデータを前記再開されたキャリブレーション方式を用いて解釈すること、
をさらに実行することを特徴とする製品。 - 請求項30に記載の製品であって、
前記キャリブレーション方式の計算を再開するステップが、
人為的なキャリブレーション用基準値を作ることと、
前記人為的なキャリブレーション用基準値、過去のキャリブレーション用基準値及び現在のキャリブレーション用基準値を用いて、前記キャリブレーション方式を作ることと、
をさらに実行することを特徴とする製品。 - 請求項28に記載の製品であって、
前記キャリブレーション方式が修正された回帰法であることを特徴とする製品。 - 請求項33に記載の製品であって、
前記修正された回帰法がガウス型回帰法であることを特徴とする製品。 - 請求項33に記載の製品であって、
前記キャリブレーション方式が、最近のキャリブレーションがどのように実行されたかに基づいて過去のキャリブレーションを重み付けすることを特徴とする製品。 - 請求項28に記載の製品であって、
前記キャリブレーションが前記センサのデータを取得しながら実行されることを特徴とする製品。 - 請求項27に記載の製品であって、
前記センサがグルコースセンサであることを特徴とする製品。 - 請求項27に記載の製品であって、
前記現在のセンサのデータ点が、
時間の経過に対するセンサからの固有のセンサのデータを所定のレートでサンプリングするステップと、
前記サンプリングされた固有のセンサのデータから所定のメモリ記憶レートで少なくとも1つの現在のセンサのデータ点を導き出すステップと、
を実行することによって取得されることを特徴とする製品。 - 請求項27に記載の方法であって、
前記現在のセンサのデータ点が、
センサの固有のデータをサンプリングするステップと、
所定のインターバルレートにわたってクリップ後のサンプリングされた固有のセンサのデータにクリッピング限界を適用し平均化することによって、インターバル値を引き出すステップと、
前記引き出されたインターバル値を所定のメモリ記憶レートで平均化することによって、少なくとも1つの前記現在のセンサのデータ点を引き出すステップと、
によって得られることを特徴とする方法。
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WO2011090003A1 (ja) | 2010-01-21 | 2011-07-28 | アークレイ株式会社 | 測定装置、測定システム、電力供給装置、及び電力供給方法 |
JPWO2011105178A1 (ja) * | 2010-02-26 | 2013-06-20 | アークレイ株式会社 | 分析装置、分析方法及び分析システム |
JP2013533026A (ja) * | 2010-06-23 | 2013-08-22 | メドトロニック ミニメド インコーポレイテッド | グルコースセンサ信号安定性の解析 |
WO2013136968A1 (ja) * | 2012-03-13 | 2013-09-19 | テルモ株式会社 | センサ挿入装置及びその装置の動作方法 |
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US6895263B2 (en) | 2005-05-17 |
AU2003228741A1 (en) | 2003-11-11 |
DE60311250D1 (de) | 2007-03-08 |
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WO2003094714A1 (en) | 2003-11-20 |
CA2482814A1 (en) | 2003-11-20 |
US7029444B2 (en) | 2006-04-18 |
CA2482814C (en) | 2010-01-19 |
EP1503660A1 (en) | 2005-02-09 |
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