JP2005237484A - 血糖値測定装置 - Google Patents
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
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- A61B5/01—Measuring temperature of body parts ; Diagnostic temperature sensing, e.g. for malignant or inflamed tissue
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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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- A61B5/145—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
- A61B5/1455—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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- A61B5/7475—User input or interface means, e.g. keyboard, pointing device, joystick
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- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
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Abstract
【解決手段】体表面に由来する複数の温度を測定し、体表面からの熱放散に関する情報を得る熱量測定部と、血中酸素量に関する情報を得る酸素量測定部と、前期複数の温度及び前記血中酸素量に各々対応するパラメータと血糖値との関係を記憶する記憶部と、前記熱量測定部及び前記酸素量測定部から入力される複数の測定値を前記パラメータへ変換し、前記パラメータを前記記憶部に記憶した前記関係に適用して血糖値を演算する演算部とを有する血糖値測定装置。
【選択図】図2
Description
Diabete & Metabolisme, "Facial and sublingual temperature changes following intravenous glucose injection in diabetics" by R.M. Hilson and T.D.R. Hockaday, 1982, 8, 15-19 Can. J. Physiol. Pharmacol., "Diabetes mellitus and thermoregulation", by A.R. Scott, T. Bennett, I.A. MacDonald, 1987, 65, 1365-1376
(1)熱産生量と熱放散量とは同等視される。
(2)熱産生量は、血中グルコース濃度と酸素供給量の関数である。
(3)酸素供給量は、血中ヘモグロビン濃度と、血中ヘモグロビン酸素飽和度と、毛細血管内の血流量によって決まる。
(4)熱放散量は、主に熱対流と熱輻射とによって決まる。
最初に、前記モデルの具体化について説明する。熱放散量について考えると、その主要な要因である対流熱伝達は、環境温度(室温)と体表温の間の温度差が関係し、他の主要な要因である輻射による熱放散量はシュテファン・ボルツマンの法則より体表温の4乗に比例する。従って、人体からの熱放散量には、室温と体表温が関係していることが分かる。一方、熱産生量に関係するもう一つの要因である酸素供給量は、ヘモグロビン濃度と、ヘモグロビン酸素飽和度と、血流量の積として表される。
(1)指表面の温度(サーミスタ23):T1
(2)熱伝導部材の温度(サーミスタ24):T2
(3)指の輻射温度(焦電検出器27):T3
(4)室温(サーミスタ28):T4
(1)正規化パラメータとグルコース濃度Cの関係を示す重回帰式を作成する。
(2)最小二乗法によって得られた式から正規化パラメータに関する正規方程式(連立方程式)を求める。
(3)正規方程式から係数ai(i=0,1,2,3,4,5)の値を求め、重回帰式に代入する。
(1)正規化パラメータとグルコース濃度Cの関係を示す重回帰式を作成する。
(2)最小二乗法によって得られた式から正規化パラメータに関する正規方程式(連立方程式)を求める。
(3)正規方程式から係数ai(i=0,1,2,3)の値を求め、重回帰式に代入する。
Claims (12)
- 体表面に由来する複数の温度を測定し、前記体表面からの熱放散に関する対流伝熱量と輻射伝熱量との算出に用いる情報を得る熱量測定部と、
血中酸素量に関する情報を得る酸素量測定部と、
前記複数の温度及び前記血中酸素量に各々対応するパラメータと血糖値との関係を記憶した記憶部と、
前記熱量測定部及び前記酸素量測定部から入力される複数の測定値を前記パラメータへ各々変換し、前記パラメータを前記記憶部に記憶した前記関係に適用して血糖値を演算する演算部と、
前記演算部によって算出された血糖値を表示する表示部と、
測定の開始を指示する測定開始ボタンと測定開始の指示以外の制御を行う制御ボタンとからなる複数の操作ボタンと、
前記操作ボタンからの入力信号を処理するボタン信号処理用フィルター機構とを備え、
前記酸素量測定部は、血流量に関する情報を得る血流量測定部と、血中のヘモグロビン濃度、ヘモグロビン酸素飽和度を得る光学測定部とを有し、
前記血流量測定部は、体表面接触部と、前記体表面接触部に隣接して設けられた隣接温度検出器と、前記体表面接触部から離れた位置の濃度を検出する間接温度検出器と、前記体表面接触部と前記間接温度検出器とをつなげる熱伝導部材を有することを特徴とする血糖値測定装置。 - 請求項1記載の血糖値測定装置において、ボタン信号処理用フィルター機構は、測定待機中、前記測定開始ボタン以外の操作ボタンからの入力信号を無効化することを特徴とする血糖値測定装置。
- 請求項1記載の血糖値測定装置において、ボタン信号処理用フィルター機構は、測定中、前記複数の操作ボタンからの入力信号を無効化することを特徴とする血糖値測定装置。
- 請求項1記載の血糖値測定装置において、前記測定開始ボタンは装置の電源ボタンを兼用していることを特徴とする血糖値測定装置。
- 環境温度を測定する環境温度測定器と、
体表面が接触する体表面接触部と、
前記体表面からの輻射熱を測定する輻射熱検出器と、
前記体表面接触部に接して設けられる熱伝導部材と、
前記体表面接触部に隣接して設けられた隣接温度検出器と、
前記熱伝導部材に隣接しかつ前記体表面接触部から離れた位置に設けられ、前記体表面接触部から離れた位置の温度を検出する間接温度検出器と、
前記体表面接触部に向けて少なくとも2つの異なる波長の光を照射する光源と、
前記光が前記体表面で反射されて生じる反射光を検出する光検出器と、
前記隣接温度検出器、前記間接温度検出器、前記環境温度測定器、前記輻射熱検出器及び前記光検出器各々の出力を各々パラメータに変換する変換部と、前記パラメータと血糖値との関係を予め記憶し、前記パラメータを前記関係に適用して血糖値を算出する処理部とを有する演算部と、
前記演算部から出力される血糖値を表示する表示部と、
測定の開始を指示する測定開始ボタンと測定開始の指示以外の制御を行う制御ボタンとからなる複数の操作ボタンと、
前記操作ボタンからの入力信号を処理するボタン信号処理用フィルター機構とを備えることを特徴とする血糖値測定装置。 - 請求項5記載の血糖値測定装置において、ボタン信号処理用フィルター機構は、測定待機中、前記測定開始ボタン以外の操作ボタンからの入力信号を無効化することを特徴とする血糖値測定装置。
- 請求項5記載の血糖値測定装置において、ボタン信号処理用フィルター機構は、測定中、前記複数の操作ボタンからの入力信号を無効化することを特徴とする血糖値測定装置。
- 請求項5記載の血糖値測定装置において、前記測定開始ボタンは装置の電源ボタンを兼用していることを特徴とする血糖値測定装置。
- 環境温度を測定する環境温度測定器と、
体表面が接触する体表面接触部と、
前記体表面からの輻射熱を測定する輻射熱検出器と、
前記体表面接触部に接して設けられる熱伝導部材と、
前記体表面接触部に隣接して設けられた隣接温度検出器と、
前記熱伝導部材に隣接しかつ前記体表面接触部から離れた位置に設けられ、前記体表面接触部から離れた位置の温度を検出する間接温度検出器と、
血中のヘモグロビン濃度とヘモグロビン酸素飽和度に関する情報を記憶した記憶部と、
前記隣接温度検出器、前記間接温度検出器、前記環境温度測定器、前記輻射熱検出器の出力を複数のパラメータに変換する変換部と、前記パラメータと血糖値との関係を予め記憶し、前記パラメータを前記関係に適用して血糖値を算出する処理部とを有する演算部と、
前記演算部から出力される血糖値を表示する表示部と、
測定の開始を指示する測定開始ボタンと測定開始の指示以外の制御を行う制御ボタンとからなる複数の操作ボタンと、
前記操作ボタンからの入力信号を処理するボタン信号処理用フィルター機構とを備えることを特徴とする血糖値測定装置。 - 請求項9記載の血糖値測定装置において、ボタン信号処理用フィルター機構は、測定待機中、前記測定開始ボタン以外の操作ボタンからの入力信号を無効化することを特徴とする血糖値測定装置。
- 請求項9記載の血糖値測定装置において、ボタン信号処理用フィルター機構は、測定中、前記複数の操作ボタンからの入力信号を無効化することを特徴とする血糖値測定装置。
- 請求項9記載の血糖値測定装置において、前記測定開始ボタンは装置の電源ボタンを兼用していることを特徴とする血糖値測定装置。
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JP2004048546A JP3590053B1 (ja) | 2004-02-24 | 2004-02-24 | 血糖値測定装置 |
EP04007593A EP1568309A1 (en) | 2004-02-24 | 2004-03-29 | Blood sugar level measuring apparatus |
US10/811,894 US20050187442A1 (en) | 2004-02-24 | 2004-03-30 | Blood sugar level measuring apparatus |
CNB2004100316547A CN1323640C (zh) | 2004-02-24 | 2004-03-31 | 血糖值测定装置 |
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JP2004048546A JP3590053B1 (ja) | 2004-02-24 | 2004-02-24 | 血糖値測定装置 |
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JP2005237484A true JP2005237484A (ja) | 2005-09-08 |
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- 2004-03-29 EP EP04007593A patent/EP1568309A1/en not_active Withdrawn
- 2004-03-30 US US10/811,894 patent/US20050187442A1/en not_active Abandoned
- 2004-03-31 CN CNB2004100316547A patent/CN1323640C/zh not_active Expired - Fee Related
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JP2007259916A (ja) * | 2006-03-27 | 2007-10-11 | Nippon Telegr & Teleph Corp <Ntt> | 成分濃度測定装置 |
JP4549995B2 (ja) * | 2006-03-27 | 2010-09-22 | 日本電信電話株式会社 | 成分濃度測定装置 |
JP2009226217A (ja) * | 2008-03-21 | 2009-10-08 | Lifescan Scotland Ltd | 検体の検査方法およびシステム |
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Also Published As
Publication number | Publication date |
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CN1660014A (zh) | 2005-08-31 |
EP1568309A1 (en) | 2005-08-31 |
US20050187442A1 (en) | 2005-08-25 |
JP3590053B1 (ja) | 2004-11-17 |
CN1323640C (zh) | 2007-07-04 |
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