JP2015129750A - 糖尿病管理モニタで分析物濃度を動的に較正および測定するためのシステムおよび方法 - Google Patents
糖尿病管理モニタで分析物濃度を動的に較正および測定するためのシステムおよび方法 Download PDFInfo
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- G—PHYSICS
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- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/48—Biological material, e.g. blood, urine; Haemocytometers
- G01N33/50—Chemical analysis of biological material, e.g. blood, urine; Testing involving biospecific ligand binding methods; Immunological testing
- G01N33/66—Chemical analysis of biological material, e.g. blood, urine; Testing involving biospecific ligand binding methods; Immunological testing involving blood sugars, e.g. galactose
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- A61B5/0059—Measuring for diagnostic purposes; Identification of persons using light, e.g. diagnosis by transillumination, diascopy, fluorescence
- A61B5/0071—Measuring for diagnostic purposes; Identification of persons using light, e.g. diagnosis by transillumination, diascopy, fluorescence by measuring fluorescence emission
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- 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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- A61B5/1455—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 optical sensors, e.g. spectral photometrical oximeters
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Abstract
Description
1.グルコースがセンサに入る、
2.グルコースがセンサによって拡散する、
3.拡散平衡が達成される、
4.グルコース分子がグルコース結合タンパク質分子(GBP)と結合する、
5.結合が蛍光スペクトルを修正する、
6.結合平衡が達成される、
7.光がGBPを刺激する、
8.GBPが蛍光を発する、および、
9.蛍光信号がセンサから出て検出される。
1.蛍光信号を検出する、
2.信号を規格化する、
3.光のスペクトルシグネチャを決定する、
4.シグネチャを創出する放出状態の濃度分率を決定する、および、
5.濃度分率状態を誘導するグルコースの濃度を決定する。
コンフィギュレーションスペクトル
σopen(λ)=σopen(λ,[G]=0)
光学フィルタ
飽和分率
Y∈[0,1]=グルコースによって飽和させられたGBP分子の分率
nopen+nclosed=N
であり、nは、それらのそれぞれのコンフィギュレーションでのGBPの数であり、Nは、任意のコンフィギュレーションでの活動状態のGBPの数である。
σi(λ)、i∈{1…C}
を有する。
{λcrossing|σi(λcrossing)=σj(λcrossing)} ∀i,j∈{1…C}
がある場合、次式のようになる。
ただしχは、交差点の周囲の帯域での[G]=0での測定される強度であり、εは許容誤差項である。
=Y∫σclosed(λ)λ-2dλ+(1−Y)∫σopen(λ)λ-2dλ
=Y[∫σclosed(λ)λ-2dλ−∫σopen(λ)λ-2dλ+(1−Y)]+∫σopen(λ)λ-2dλ
=Y[∫(σclosed(λ)−σopen(λ))λ-2dλ]+∫σopen(λ)λ-2dλ
σref(λ)=Href(λ)・σtotal(λ)λ-2dλ
Iref=∫ΛHref(λ)・σtotal(λ)λ-2dλ
現実世界のフィルタは単一の周波数を分離することが可能でないので、擬似的な不変参照帯域を見出すことが好ましい。これは、次式のように表され得る。
ただしεは、参照チャネル上の許容変動により決定される。
全体的な検出されるパワーを最大化し、SNRを増大することになる信号チャネルとして使用するための通過帯域を見出すことが好ましい。信号チャネルはさらに、好ましくは、グルコースの任意の変化に最大限に高感度である。上記で論考されたように、すべてのスペクトルが基礎スペクトルの線形組み合わせであるので、および、積分(パワー)が加法的であるので、2つの基礎状態の間で最大限に変化している最も大きな範囲を見出せばよい。
Claims (30)
- 分析物の濃度を決定するための光学分析物センサであって、
未知の濃度での前記分析物を内包する試料を受けるためのマトリクスと、
前記試料上で、刺激周波数で光を放出するための光放出体と、
第1の等吸収周波数で、および第2の周波数で蛍光信号を受けるための、ならびに、前記第1および前記第2の周波数で前記蛍光信号の強度を測定するための光受信器と、
前記第1および前記第2の周波数で測定される前記それぞれの強度に基づいて前記分析物の濃度を決定するためのプロセッサと
を備えることを特徴とする光学分析物センサ。 - 前記センサはインビトロセンサであることを特徴とする請求項1に記載の光学分析物センサ。
- 前記センサはインビボセンサであることを特徴とする請求項1に記載の光学分析物センサ。
- 前記センサは連続センサであることを特徴とする請求項1に記載の光学分析物センサ。
- 前記分析物はグルコースであることを特徴とする請求項1に記載の光学分析物センサ。
- 前記分析物はヘモグロビンHbA1cであることを特徴とする請求項1に記載の光学分析物センサ。
- 前記分析物は糖化アルブミンであることを特徴とする請求項1に記載の光学分析物センサ。
- 前記マトリクスは、グルコースの存在下の第1のコンホメーション、および、グルコースの非存在下の第2のコンホメーションをとるグルコース結合タンパク質を備えることを特徴とする請求項1に記載の光学分析物センサ。
- 前記マトリクスはボロン酸を備えることを特徴とする請求項1に記載の光学分析物センサ。
- 前記マトリクスは任意の分析物結合化合物を備えることを特徴とする請求項1に記載の光学分析物センサ。
- 前記マトリクスは任意のグルコース結合化合物を備えることを特徴とする請求項1に記載の光学分析物センサ。
- 光学分析物センサとインスリン注入デバイスとを備える糖尿病管理システムであって、
前記光学分析物センサは、
未知の濃度での分析物を内包する試料を受けるためのマトリクスと、
前記試料上で、刺激周波数で光を放出するための光放出体と、
第1の等吸収周波数で、および第2の周波数で蛍光信号を受けるための、ならびに、前記第1および前記第2の周波数で前記蛍光信号の強度を測定するための光受信器と、
前記第1および前記第2の周波数で測定される前記それぞれの強度に基づいて前記分析物の濃度を決定するためのプロセッサと
を備え、
前記分析物センサは、前記インスリン注入デバイスに信号を送信するための送受信器をさらに備えることを特徴とする糖尿病管理システム。 - 前記プロセッサはインスリン要件をさらに決定し、前記インスリン注入デバイスに送信される前記信号は、前記決定されたインスリン要件に基づくインスリン要件を備えることを特徴とする請求項12に記載の糖尿病管理システム。
- 前記センサはインビトロセンサであることを特徴とする請求項12に記載の糖尿病管理システム。
- 前記センサはインビボセンサであることを特徴とする請求項12に記載の糖尿病管理システム。
- 前記センサは連続センサであることを特徴とする請求項12に記載の糖尿病管理システム。
- 前記分析物はグルコースであることを特徴とする請求項12に記載の糖尿病管理システム。
- 前記分析物はヘモグロビンHbA1cであることを特徴とする請求項12に記載の糖尿病管理システム。
- 前記分析物は糖化アルブミンであることを特徴とする請求項12に記載の糖尿病管理システム。
- 未知の濃度での分析物を内包する試料を受けるためのマトリクスと、
前記試料上で、刺激周波数で光を放出するための光放出体と、
第1の等吸収周波数で、および第2の周波数で蛍光信号を受けるための、ならびに、前記第1および前記第2の周波数で前記蛍光信号の強度を測定するための光受信器と、
前記第1および前記第2の周波数で測定される前記それぞれの強度に基づいて前記分析物の濃度を決定するためのプロセッサと
を備え、
前記プロセッサは、事前の強度測定に基づいてセンサドリフトをさらに決定し、前記決定されたセンサドリフトに基づいて、前記決定された濃度を補正することを特徴とする光学分析物センサ。 - 遠隔デバイスに決定された分析物濃度を指示する信号を送信するための送受信器をさらに備えることを特徴とする請求項20に記載の光学分析物センサ。
- 前記遠隔デバイスはスマートフォンであることを特徴とする請求項21に記載の光学分析物センサ。
- 前記送受信器は遠隔記憶デバイスに信号を送信することを特徴とする請求項21に記載の光学分析物センサ。
- 前記光学センサは、エネルギー源を備え、少なくとも1日の連続使用に適合させられることを特徴とする請求項20に記載の光学分析物センサ。
- 前記光学センサは受容者の皮下の空間で使用されることを特徴とする請求項20に記載の光学分析物センサ。
- 前記光学センサは受容者の皮内の空間で使用されることを特徴とする請求項20に記載の光学分析物センサ。
- 前記光学センサは受容者の皮上の空間で使用されることを特徴とする請求項20に記載の光学分析物センサ。
- 前記光学センサは受容者の脈管内の空間で使用されることを特徴とする請求項20に記載の光学分析物センサ。
- 前記光学センサは体液で使用されることを特徴とする請求項20に記載の光学分析物センサ。
- 前記光学分析物センサはインビトロセンサであることを特徴とする請求項20に記載の光学分析物センサ。
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JP2021529943A (ja) * | 2018-06-28 | 2021-11-04 | ベクトン・ディキンソン・アンド・カンパニーBecton, Dickinson And Company | 血液培養測定システムにおける信号を正規化するためのシステム及び方法 |
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