JPH10501995A - 自己発光非侵襲性赤外分光光度計 - Google Patents
自己発光非侵襲性赤外分光光度計Info
- Publication number
- JPH10501995A JPH10501995A JP7530500A JP53050095A JPH10501995A JP H10501995 A JPH10501995 A JP H10501995A JP 7530500 A JP7530500 A JP 7530500A JP 53050095 A JP53050095 A JP 53050095A JP H10501995 A JPH10501995 A JP H10501995A
- Authority
- JP
- Japan
- Prior art keywords
- infrared
- blood
- concentration
- wavelength
- light
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
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Classifications
-
- 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, 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
-
- 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, 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
-
- 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, pH value; Measuring characteristics of body fluids or tissues, e.g. interstitial fluid, cerebral tissue
- A61B5/14546—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 analytes not otherwise provided for, e.g. ions, cytochromes
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- 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
- A61B5/6801—Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient specially adapted to be attached to or worn on the body surface
- A61B5/6813—Specially adapted to be attached to a specific body part
- A61B5/6825—Hand
- A61B5/6826—Finger
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
- G01N21/31—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry
- G01N21/35—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using infrared light
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
- G01N21/31—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry
- G01N21/35—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using infrared light
- G01N21/3581—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using infrared light using far infrared light; using Terahertz radiation
Abstract
Description
Claims (1)
- 【特許請求の範囲】 1.人の血液の少なくとも一つの所定の成分の赤外吸収を決定するための手段 であり、該決定のために赤外エネルギー源として人からの赤外発光を使用する手 段と、 該決定手段によって決定された赤外吸収からの該少なくとも一つの所定の成分の 濃度を計算するための処理手段とを具備する非侵襲性赤外分光光度計。 2.人の血液における少なくとも一つの所定の成分の濃度を決定するための非 侵襲性分光光度計において、 少なくとも2.0μmのn個の異なる波長を含む波長範囲において人によって発 せられた赤外エネルギーを検出するための手段であり、該赤外エネルギーは、該 少なくとも一つの所定の成分によって別様に吸収された該n個の波長の各々にお けるエネルギーを含み、これにより、各所定の成分は、該n個の波長の少なくと も一つにおいて赤外エネルギーを容易に吸収し、該n個の波長の別の波長におい て赤外エネルギーを最小に吸収し、該検出手段は、該人によって発せられ、該少 なくとも一つの所定の成分によって選択的に吸収された該n個の波長における赤 外エネルギーを表現する少なくとも一つの検出信号を出力する検出手段と、 人の心周期の収縮期及び拡張期フェーズにより人によって発せられた該赤外エネ ルギーの検出を同期化するための同期手段と、 該少なくとも一つの検出信号から人の血液の該少なくとも一つの所定の成分の濃 度を決定するための手段とを具備する非侵襲性赤外分光光度計。 3.該赤外エネルギーが、人の心周期の拡張期及び収縮期フェーズの拡張期及 び収縮期間隔中、それぞれ、該検出手段によって検出され、各 間隔は、人の該心周期の収縮期及び拡張期フェーズ中、約0.1〜10msec の持続時間を有する請求の範囲2に記載の分光光度計。 4.該少なくとも一つの所定の成分が、グルコースを含み、該少なくとも一つ の波長が、約9.1μmであり、そして該別の波長が、約10.5μmである請 求の範囲2に記載の分光光度計。 5.人の動脈血管と該少なくとも一つの赤外検出器の間に配された第1及び第 2帯域フィルターを含む分析フィルターホイールをさらに具備し、該第1帯域フ ィルターは、約9.1μmに中心がある狭い通過帯域において赤外光を通過させ 、該第2帯域フィルターは、約10.5μmに中心がある狭い通過帯域において 赤外光を通過させる請求の範囲4に記載の分光光度計。 6.人の動脈血管と該少なくとも一つの赤外検出器の間に配され、約9.1μ mに中心がある狭い通過帯域において赤外光を通過させる第1帯域フィルターと 、人の動脈血管と該少なくとも一つの赤外検出器の間に配され、約10.5μm に中心がある狭い通過帯域において赤外光を通過させる第2帯域フィルターとを さらに具備する請求の範囲4に記載の分光光度計。 7.該少なくとも一つの所定の成分が、エチルアルコールを含み、該一つの波 長が、約3.4μmであり、そして該別の波長が、約4.8μmである請求の範 囲2に記載の分光光度計。 8.人の動脈血管と該少なくとも一つの赤外検出器の間に配された第1及び第 2帯域フィルターを含む分析フィルターホイールをさらに具備し、該第1帯域フ ィルターは、約3.4μmに中心がある狭い通過帯域において赤外光を通過させ 、該第2帯域フィルターは、約4.8μmに 中心がある狭い通過帯域において赤外光を通過させる請求の範囲7に記載の分光 光度計。 9.人の動脈血管と該少なくとも一つの赤外検出器の間に配され、約3.4μm に中心がある狭い通過帯域において赤外光を通過させる第1帯域フィルターと、 人の動脈血管と該少なくとも一つの赤外検出器の間に配され、約4.8μmに中 心がある狭い通過帯域において赤外光を通過させる第2帯域フィルターとをさら に具備する請求の範囲7に記載の分光光度計。 10.該同期手段が、心臓モニタと、人の心周期の収縮期及び拡張期フェーズ を検出するために人の十分に灌流された組織に連結されたプレシスモグラフセン サーとを含む請求の範囲2に記載の分光光度計。 11.該プレシスモグラフセンサーが、人の該十分に灌流された組織を通して 光を指向させるパルス発光ダイオードと、光の該十分に灌流された組織を通過し た光を検出する光検出器とを具備し、そして該心臓モニタが、該心周期のフェー ズを決定するために該光検出器の検出出力を処理するための処理手段を具備する 請求の範囲10に記載の分光光度計。 12.該濃度決定手段が、比率R1=(Sys L1 − Dias L1) /(Sys L2 − Dias L2)を形成し、ここで、Sys L1が、 該少なくとも一つの波長における検出収縮期フェーズ信号であり、Dias L 1が、該一つの波長における検出拡張期フェーズ信号であり、Sys L2が、 該別の波長における検出収縮期フェーズ信号であり、そしてDias L2が、 該別の波長における検出拡張期フェーズ信号である請求の範囲2に記載の分光光 度計。 13.該濃度決定手段が、次の方程式により、光の血液の該少なくと も一つの所定の成分の濃度を計算する、 ここで、C.C.nは、該少なくとも一つの所定の成分nの濃度であり、 B、Cx,yとDzは、経験的に決定された較正係数であり、 mは、使用された検出及び基準波長の数であり、 pは、使用された多項式の最高次数であり、そして Lnは、自然対数関数である、 請求の範囲12に記載の分光光度計。 14.該検出手段による検出の前に、通過帯域を超える周波数に人によって発 せられた該赤外エネルギーを変調するためのチョッパーホイールと、該少なくと も一つの検出信号を増幅するための前置増幅器と、通過帯域を超える該周疲数に 中心がある帯域フィルターと、通過帯域を超える該周波数から該復調信号を復調 するための同期復調器とをさらに具備する請求の範囲2に記載の分光光度計。 15.光の血液における少なくとも一つの所定の成分の濃度を非侵襲的に測定 する方法において、 光からの赤外発光を検出する段階と、 該決定に対する赤外エネルギー源として、該検出段階において検出された該赤外 発光を使用して、光の血液の少なくとも一つの所定の成分の赤外吸収を決定する 段階と、 該決定段階において決定された赤外吸収からの該少なくとも一つの所定の成分の 濃度を計算する段階とを具備する方法。 16.光の血液における少なくとも一つの所定の成分の濃度を非侵襲 的に測定する方法において、 少なくとも2.0μmのn個の異なる波長を含む波長範囲において光によって発 せられた赤外エネルギーを検出する段階であり、該赤外エネルギーは、該少なく とも一つの所定の成分によって別様に吸収された該n個の波長の各々におけるエ ネルギーを含み、これにより、各所定の成分は、該n個の波長の少なくとも一つ において赤外エネルギーを容易に吸収し、該n個の波長の別の波長において赤外 エネルギーを最小に吸収し、該人によって発せられ、該少なくとも一つの所定の 成分によって選択的に吸収された該n個の波長における赤外エネルギーを表現す る少なくとも一つの検出信号を出力する段階と、 人の心周期の収縮期及び拡張期フェーズにより人によって発せられた該赤外エネ ルギーの検出を同期化する段階と、 該少なくとも一つの検出信号から人の血液の該少なくとも一つの所定の成分の濃 度を決定する段階とを具備する方法。 17.該同期段階が、人の心周期の収縮期及び拡張期フェーズ中発生する拡張 期及び収縮期間隔をそれぞれ決定する段階を含む、これにより、該検出段階が、 該収縮期及び拡張期間隔中行われる請求の範囲16に記載の方法。 18.該濃度決定手段が、比率R=(Sys L1 − Dias L1)/ (Sys L2 − Dias L2)を形成する段階を含み、ここで、Sys L1は、該少なくとも一つの波長における検出収縮期フェーズ信号であり、D ias L1は、該一つの波長における検出拡張期フェーズ信号であり、Sys L2は、該別の波長における検出収縮期フェーズ信号であり、そしてDias L2は、該別の波長におけ る検出拡張期フェーズ信号である請求の範囲16に記載の方法。 19.該濃度決定手段が、次の方程式により、光の血液の該少なくとも一つの 所定の成分の濃度を計算する段階を含む、 ここで、C.C.nは、該少なくとも一つの所定の成分nの濃度であり、 B、Cx,yとDzは、経験的に決定された較正係数であり、 mは、使用された検出及び基準波長の数であり、 pは、使用された多項式の最高次数であり、そして Lnは、自然対数関数である、 請求の範囲18に記載の分光光度計。 20.人の付属体に加圧帯を適用する段階と、該検出段階における赤外エネル ギーの検出と同期して所定の圧力に該加圧帯を膨張させる段階とを具備する請求 の範囲16に記載の方法。
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US08/247,311 | 1994-05-23 | ||
US08/247,311 US5515847A (en) | 1993-01-28 | 1994-05-23 | Self-emission noninvasive infrared spectrophotometer |
PCT/US1995/006513 WO1995031930A1 (en) | 1994-05-23 | 1995-05-22 | Self-emission noninvasive infrared spectrophotometer |
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US5515847A (en) | 1996-05-14 |
AU2555795A (en) | 1995-12-18 |
JP3590408B2 (ja) | 2004-11-17 |
CA2189754A1 (en) | 1995-11-30 |
EP0763999A1 (en) | 1997-03-26 |
CA2189754C (en) | 2000-08-29 |
AU683757B2 (en) | 1997-11-20 |
WO1995031930A1 (en) | 1995-11-30 |
EP0763999A4 (en) | 1997-10-01 |
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