BR0111354A - Análise de material fotoacústico - Google Patents

Análise de material fotoacústico

Info

Publication number
BR0111354A
BR0111354A BR0111354-2A BR0111354A BR0111354A BR 0111354 A BR0111354 A BR 0111354A BR 0111354 A BR0111354 A BR 0111354A BR 0111354 A BR0111354 A BR 0111354A
Authority
BR
Brazil
Prior art keywords
frequency
light
interest
component
resonant
Prior art date
Application number
BR0111354-2A
Other languages
English (en)
Inventor
Jacob Geva
Leonid Trachtenberg
Anotoly Kravetz
Original Assignee
Card Guard Scient Survival Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Card Guard Scient Survival Ltd filed Critical Card Guard Scient Survival Ltd
Publication of BR0111354A publication Critical patent/BR0111354A/pt

Links

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
    • A61B5/0093—Detecting, measuring or recording by applying one single type of energy and measuring its conversion into another type of energy
    • A61B5/0095—Detecting, measuring or recording by applying one single type of energy and measuring its conversion into another type of energy by applying light and detecting acoustic waves, i.e. photoacoustic measurements
    • 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
    • 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
    • G01N21/1702—Systems in which incident light is modified in accordance with the properties of the material investigated with opto-acoustic detection, e.g. for gases or analysing solids

Landscapes

  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Physics & Mathematics (AREA)
  • General Health & Medical Sciences (AREA)
  • Pathology (AREA)
  • Biophysics (AREA)
  • Veterinary Medicine (AREA)
  • Public Health (AREA)
  • Animal Behavior & Ethology (AREA)
  • Surgery (AREA)
  • Molecular Biology (AREA)
  • Medical Informatics (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Engineering & Computer Science (AREA)
  • Biomedical Technology (AREA)
  • Optics & Photonics (AREA)
  • Chemical & Material Sciences (AREA)
  • Emergency Medicine (AREA)
  • Analytical Chemistry (AREA)
  • Immunology (AREA)
  • General Physics & Mathematics (AREA)
  • Biochemistry (AREA)
  • Acoustics & Sound (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
  • Measurement Of The Respiration, Hearing Ability, Form, And Blood Characteristics Of Living Organisms (AREA)
  • Investigating Or Analysing Materials By Optical Means (AREA)

Abstract

"ANáLISE DE MATERIAL FOTOACúSTICO". Trata-se de um método e um aparelho para determinar a concentração de um componente de interesse em um meio através da espectroscopia fotoacústica ressonante (RPAS) com um trem de pulsos de luz que compreende pulsos curtos eq³idistantes que têm duração, freq³ência, número, e potência variáveis. O comprimento de onda da luz é selecionado de modo a ser absorvida pelo componente de interesse. Com a irradiação, as oscilações acústicas são geradas pela luz absorvida em uma camada relativamente fina do meio, caracterizada por um comprimento de difusão de calor. A repetição da freq³ência dos pulsos curtos de luz no trem de pulsos é escolhida da mesma forma que a freq³ência de oscilação acústica natural da camada fina do meio que pode ser considerada como uma membrana fina. Desse modo, a oscilação acústica torna-se ressonante. A medição da amplitude e da freq³ência das oscilações ressonantes determina a concentração do componente de interesse. O método e o aparelho são agentes de monitoramento apropriados de componentes do sangue, especialmente a glicose.
BR0111354-2A 2000-05-17 2001-05-15 Análise de material fotoacústico BR0111354A (pt)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US09/573,528 US6466806B1 (en) 2000-05-17 2000-05-17 Photoacoustic material analysis
PCT/IL2001/000430 WO2001087135A2 (en) 2000-05-17 2001-05-15 Photoacoustic material analysis

Publications (1)

Publication Number Publication Date
BR0111354A true BR0111354A (pt) 2005-02-01

Family

ID=24292350

Family Applications (1)

Application Number Title Priority Date Filing Date
BR0111354-2A BR0111354A (pt) 2000-05-17 2001-05-15 Análise de material fotoacústico

Country Status (6)

Country Link
US (1) US6466806B1 (pt)
EP (1) EP1284634A4 (pt)
JP (1) JP2004510127A (pt)
AU (1) AU5664301A (pt)
BR (1) BR0111354A (pt)
WO (1) WO2001087135A2 (pt)

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Also Published As

Publication number Publication date
EP1284634A2 (en) 2003-02-26
US6466806B1 (en) 2002-10-15
EP1284634A4 (en) 2003-06-18
WO2001087135A2 (en) 2001-11-22
JP2004510127A (ja) 2004-04-02
AU5664301A (en) 2001-11-26
WO2001087135A3 (en) 2002-03-28

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B08K Patent lapsed as no evidence of payment of the annual fee has been furnished to inpi [chapter 8.11 patent gazette]

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