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WO2003059164A3 - Device for monitoring blood flow to brain - Google Patents

Device for monitoring blood flow to brain Download PDF

Info

Publication number
WO2003059164A3
WO2003059164A3 PCT/IL2003/000042 IL0300042W WO03059164A3 WO 2003059164 A3 WO2003059164 A3 WO 2003059164A3 IL 0300042 W IL0300042 W IL 0300042W WO 03059164 A3 WO03059164 A3 WO 03059164A3
Authority
WO
WIPO (PCT)
Prior art keywords
brain
blood flow
monitoring blood
head
currents
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.)
Ceased
Application number
PCT/IL2003/000042
Other languages
French (fr)
Other versions
WO2003059164A2 (en
Inventor
Shlomi Ben-Ari
Alon Rappaport
Aharon Shapira
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Orsan Medical Equipment Ltd
Original Assignee
Orsan Medical Equipment 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
Priority to AU2003209608A priority Critical patent/AU2003209608A1/en
Application filed by Orsan Medical Equipment Ltd filed Critical Orsan Medical Equipment Ltd
Publication of WO2003059164A2 publication Critical patent/WO2003059164A2/en
Publication of WO2003059164A3 publication Critical patent/WO2003059164A3/en
Priority to US10/893,570 priority patent/US7998080B2/en
Anticipated expiration legal-status Critical
Priority to US11/572,141 priority patent/US8187197B2/en
Priority to US11/572,157 priority patent/US8702615B2/en
Priority to US11/921,937 priority patent/US8512253B2/en
Priority to US11/610,553 priority patent/US8211031B2/en
Priority to US13/165,890 priority patent/US20110251503A1/en
Priority to US13/484,519 priority patent/US20130109979A1/en
Priority to US13/941,587 priority patent/US20140163404A1/en
Priority to US14/197,394 priority patent/US20140358016A1/en
Ceased legal-status Critical Current

Links

Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/02—Detecting, measuring or recording for evaluating the cardiovascular system, e.g. pulse, heart rate, blood pressure or blood flow
    • A61B5/026—Measuring blood flow
    • A61B5/0261—Measuring blood flow using optical means, e.g. infrared light
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/02—Detecting, measuring or recording for evaluating the cardiovascular system, e.g. pulse, heart rate, blood pressure or blood flow
    • A61B5/026—Measuring blood flow
    • A61B5/0265—Measuring blood flow using electromagnetic means, e.g. electromagnetic flowmeter
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/02—Detecting, measuring or recording for evaluating the cardiovascular system, e.g. pulse, heart rate, blood pressure or blood flow
    • A61B5/026—Measuring blood flow
    • A61B5/0295—Measuring blood flow using plethysmography, i.e. measuring the variations in the volume of a body part as modified by the circulation of blood therethrough, e.g. impedance plethysmography
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/05—Detecting, measuring or recording for diagnosis by means of electric currents or magnetic fields; Measuring using microwaves or radio waves
    • A61B5/053—Measuring electrical impedance or conductance of a portion of the body
    • A61B5/0535—Impedance plethysmography
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/24—Detecting, measuring or recording bioelectric or biomagnetic signals of the body or parts thereof
    • A61B5/242—Detecting biomagnetic fields, e.g. magnetic fields produced by bioelectric currents
    • A61B5/245—Detecting biomagnetic fields, e.g. magnetic fields produced by bioelectric currents specially adapted for magnetoencephalographic [MEG] signals
    • 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
    • A61B5/6814—Head
    • 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
    • A61B5/6814—Head
    • A61B5/6815—Ear
    • A61B5/6817—Ear canal
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B2562/00—Details of sensors; Constructional details of sensor housings or probes; Accessories for sensors
    • A61B2562/16—Details of sensor housings or probes; Details of structural supports for sensors
    • A61B2562/164—Details of sensor housings or probes; Details of structural supports for sensors the sensor is mounted in or on a conformable substrate or carrier

Landscapes

  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Physics & Mathematics (AREA)
  • General Health & Medical Sciences (AREA)
  • Veterinary Medicine (AREA)
  • Engineering & Computer Science (AREA)
  • Biomedical Technology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Medical Informatics (AREA)
  • Molecular Biology (AREA)
  • Surgery (AREA)
  • Animal Behavior & Ethology (AREA)
  • Biophysics (AREA)
  • Public Health (AREA)
  • Pathology (AREA)
  • Hematology (AREA)
  • Cardiology (AREA)
  • Physiology (AREA)
  • Otolaryngology (AREA)
  • Electromagnetism (AREA)
  • Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
  • Radiology & Medical Imaging (AREA)
  • Measuring Pulse, Heart Rate, Blood Pressure Or Blood Flow (AREA)
  • Magnetic Resonance Imaging Apparatus (AREA)

Abstract

A method of estimating blood flow in the brain, comprising: a) causing currents to flow inside the head by producing electric fields inside the head; b) measuring at least changes in the electric fields and the currents; and c) estimating changes in the blood volume of the head, using the measurements of the electric fields and the currents.
PCT/IL2003/000042 2002-01-15 2003-01-15 Device for monitoring blood flow to brain Ceased WO2003059164A2 (en)

Priority Applications (10)

Application Number Priority Date Filing Date Title
AU2003209608A AU2003209608A1 (en) 2002-01-15 2003-01-15 Device for monitoring blood flow to brain
US10/893,570 US7998080B2 (en) 2002-01-15 2004-07-15 Method for monitoring blood flow to brain
US11/572,141 US8187197B2 (en) 2002-01-15 2005-06-15 Cerebral perfusion monitor
US11/572,157 US8702615B2 (en) 2002-01-15 2005-06-15 Device for monitoring blood flow to brain
US11/921,937 US8512253B2 (en) 2002-01-15 2006-01-17 Cerebral perfusion monitor
US11/610,553 US8211031B2 (en) 2002-01-15 2006-12-14 Non-invasive intracranial monitor
US13/165,890 US20110251503A1 (en) 2002-01-15 2011-06-22 Device for monitoring blood flow to brain
US13/484,519 US20130109979A1 (en) 2002-01-15 2012-05-31 Non-invasive intracranial monitor
US13/941,587 US20140163404A1 (en) 2002-01-15 2013-07-15 Cerebral Perfusion Monitor
US14/197,394 US20140358016A1 (en) 2002-01-15 2014-03-05 Device for Monitoring Blood Flow to the Brain

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US34827802P 2002-01-15 2002-01-15
US60/348,278 2002-01-15

Related Child Applications (1)

Application Number Title Priority Date Filing Date
US10/893,570 Continuation-In-Part US7998080B2 (en) 2002-01-15 2004-07-15 Method for monitoring blood flow to brain

Publications (2)

Publication Number Publication Date
WO2003059164A2 WO2003059164A2 (en) 2003-07-24
WO2003059164A3 true WO2003059164A3 (en) 2003-12-11

Family

ID=23367336

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IL2003/000042 Ceased WO2003059164A2 (en) 2002-01-15 2003-01-15 Device for monitoring blood flow to brain

Country Status (2)

Country Link
AU (1) AU2003209608A1 (en)
WO (1) WO2003059164A2 (en)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7998080B2 (en) * 2002-01-15 2011-08-16 Orsan Medical Technologies Ltd. Method for monitoring blood flow to brain
US8211031B2 (en) 2002-01-15 2012-07-03 Orsan Medical Technologies Ltd. Non-invasive intracranial monitor
WO2006011128A1 (en) 2004-07-15 2006-02-02 Orsan Medical Technologies Ltd. Cerebral perfusion monitor
WO2006134501A1 (en) * 2005-06-15 2006-12-21 Orsan Medical Technologies Ltd. Cerebral perfusion monitor
AU2003272581A1 (en) * 2002-09-17 2004-04-08 Beth Israel Deaconess Medical Center, Inc. Radio frequency impedance mapping
ES2276609B1 (en) * 2005-09-27 2008-06-16 Universidad Politecnica De Valencia APPARATUS AND METHOD OF OBTAINING INFORMATION CONCERNING CEREBRAL HEMODINAMICS.
JP2007289224A (en) * 2006-04-21 2007-11-08 Hitachi Ltd Biological measuring device and biological measuring method
US9345411B2 (en) 2011-02-09 2016-05-24 Orsan Medical Technologies, Ltd. Devices and methods for monitoring cerebral hemodynamic conditions
EP3603499A1 (en) * 2018-08-03 2020-02-05 Nokia Technologies Oy Providing an output relating to conductivity distribution
CN111528826A (en) * 2020-05-25 2020-08-14 陈聪 Method for acquiring brain impedance blood flow graph data
DE102020131377A1 (en) * 2020-11-26 2022-06-02 Lts Lohmann Therapie-Systeme Ag. Sensor device, use of a sensor device and method for detecting the properties of an area of skin

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1057498A2 (en) * 1999-05-31 2000-12-06 Laerdal Medical AS System and method for measuring blood flow during defibrillation

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB9222888D0 (en) 1992-10-30 1992-12-16 British Tech Group Tomography
US5725471A (en) 1994-11-28 1998-03-10 Neotonus, Inc. Magnetic nerve stimulator for exciting peripheral nerves
US5749369A (en) 1996-08-09 1998-05-12 R.S. Medical Monitoring Ltd. Method and device for stable impedance plethysmography
US5788643A (en) 1997-04-22 1998-08-04 Zymed Medical Instrumentation, Inc. Process for monitoring patients with chronic congestive heart failure

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1057498A2 (en) * 1999-05-31 2000-12-06 Laerdal Medical AS System and method for measuring blood flow during defibrillation

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
GRONLUND J ET AL: "HIGH FREQUENCY VARIABILITY OF TRANSCEPHALIC ELECTRICAL IMPEDANCE. ÖA NEW PARAMETER FOR MONITORING OF NEONATAL CEREBRAL CIRCULATION?", PROCEEDINGS OF THE ANNUAL INTERNATIONAL CONFERENCE OF THE ENGINEERING IN MEDICINE AND BIOLOGY SOCIETY. PARIS, OCT. 29 - NOV. 1, 1992, NEW YORK, IEEE, US, vol. 6 CONF. 14, 29 October 1992 (1992-10-29), pages 2513 - 2515, XP000347027 *

Also Published As

Publication number Publication date
AU2003209608A1 (en) 2003-07-30
WO2003059164A2 (en) 2003-07-24

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