WO2011048556A3 - Photoplethysmography at multiple depths - Google Patents

Photoplethysmography at multiple depths Download PDF

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Publication number
WO2011048556A3
WO2011048556A3 PCT/IB2010/054746 IB2010054746W WO2011048556A3 WO 2011048556 A3 WO2011048556 A3 WO 2011048556A3 IB 2010054746 W IB2010054746 W IB 2010054746W WO 2011048556 A3 WO2011048556 A3 WO 2011048556A3
Authority
WO
WIPO (PCT)
Prior art keywords
unit
blood flow
wavelength
light
measure blood
Prior art date
Application number
PCT/IB2010/054746
Other languages
French (fr)
Other versions
WO2011048556A2 (en
Inventor
Reuven Gladshtein
Benjamin Maytal
Original Assignee
Reuven Gladshtein
Benjamin Maytal
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 Reuven Gladshtein, Benjamin Maytal filed Critical Reuven Gladshtein
Publication of WO2011048556A2 publication Critical patent/WO2011048556A2/en
Publication of WO2011048556A3 publication Critical patent/WO2011048556A3/en

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 pulse, heart rate, blood pressure or blood flow; Combined pulse/heart-rate/blood pressure determination; Evaluating a cardiovascular condition not otherwise provided for, e.g. using combinations of techniques provided for in this group with electrocardiography or electroauscultation; Heart catheters for measuring blood pressure
    • 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 pulse, heart rate, blood pressure or blood flow; Combined pulse/heart-rate/blood pressure determination; Evaluating a cardiovascular condition not otherwise provided for, e.g. using combinations of techniques provided for in this group with electrocardiography or electroauscultation; Heart catheters for measuring blood pressure
    • A61B5/024—Detecting, measuring or recording pulse rate or heart rate
    • A61B5/02416—Detecting, measuring or recording pulse rate or heart rate using photoplethysmograph signals, e.g. generated by infrared radiation
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/103—Detecting, measuring or recording devices for testing the shape, pattern, colour, size or movement of the body or parts thereof, for diagnostic purposes
    • A61B5/11—Measuring movement of the entire body or parts thereof, e.g. head or hand tremor, mobility of a limb
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/72—Signal processing specially adapted for physiological signals or for diagnostic purposes
    • A61B5/7203—Signal processing specially adapted for physiological signals or for diagnostic purposes for noise prevention, reduction or removal
    • A61B5/7207—Signal processing specially adapted for physiological signals or for diagnostic purposes for noise prevention, reduction or removal of noise induced by motion artifacts
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/72—Signal processing specially adapted for physiological signals or for diagnostic purposes
    • A61B5/7235—Details of waveform analysis
    • A61B5/7239—Details of waveform analysis using differentiation including higher order derivatives

Abstract

A photoplethysmograph (PPG) includes a unit to measure blood flow through capillaries, a unit to measure blood flow through small blood vessels and a unit to measure blood flow through large blood vessels. Another PPG includes a multiplicity of light transmitters, each transmitting at a different wavelength and at least one photodetector to detect light from at least one of the multiplicity of transmitters after the light has reflected off elements within a body. Each the wavelength has its own penetration depth and each transmitter is geometrically placed with respect to its photodetector to create a measurement depth for its measurement arc which is close to the penetration depth for its wavelength.
PCT/IB2010/054746 2009-10-20 2010-10-20 Photoplethysmography at multiple depths WO2011048556A2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US27930509P 2009-10-20 2009-10-20
US61/279,305 2009-10-20

Publications (2)

Publication Number Publication Date
WO2011048556A2 WO2011048556A2 (en) 2011-04-28
WO2011048556A3 true WO2011048556A3 (en) 2011-08-11

Family

ID=43900747

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IB2010/054746 WO2011048556A2 (en) 2009-10-20 2010-10-20 Photoplethysmography at multiple depths

Country Status (1)

Country Link
WO (1) WO2011048556A2 (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20150216425A1 (en) * 2012-08-10 2015-08-06 Vita-Sentry Ltd. Estimations of equivalent inner diameter of arterioles
US10165955B2 (en) 2014-02-06 2019-01-01 Reuven Gladshtein Obtaining cardiovascular parameters using arterioles related transient time
WO2015123606A2 (en) * 2014-02-16 2015-08-20 Boris Tverskoy Method and apparatus for real-time non-invasive optical monitoring of decompression sickness state
US20220110536A1 (en) * 2018-12-28 2022-04-14 Bionous, LLC Methods and systems for multi-dimensional photoplethysmography (ppg)
CN111297341A (en) * 2020-02-20 2020-06-19 京东方科技集团股份有限公司 Developments blood pressure check out test set and pulse wave characteristic extraction equipment

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20040127779A1 (en) * 1998-02-05 2004-07-01 Steuer Robert R. Method and apparatus for non-invasive blood constituent monitoring
US6859658B1 (en) * 1998-11-18 2005-02-22 Lea Medizintechnik Gmbh Device for non-invasively detecting the oxygen metabolism in tissues
US20050113656A1 (en) * 1992-05-18 2005-05-26 Britton Chance Hemoglobinometers and the like for measuring the metabolic condition of a subject
US20060016963A1 (en) * 2004-06-07 2006-01-26 Benjamin Maytal Medical sensors
US20060258927A1 (en) * 1998-10-15 2006-11-16 Edgar Reuben W Jr Method, apparatus, and system for removing motion artifacts from measurements of bodily parameters

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20050113656A1 (en) * 1992-05-18 2005-05-26 Britton Chance Hemoglobinometers and the like for measuring the metabolic condition of a subject
US20040127779A1 (en) * 1998-02-05 2004-07-01 Steuer Robert R. Method and apparatus for non-invasive blood constituent monitoring
US20060258927A1 (en) * 1998-10-15 2006-11-16 Edgar Reuben W Jr Method, apparatus, and system for removing motion artifacts from measurements of bodily parameters
US6859658B1 (en) * 1998-11-18 2005-02-22 Lea Medizintechnik Gmbh Device for non-invasively detecting the oxygen metabolism in tissues
US20060016963A1 (en) * 2004-06-07 2006-01-26 Benjamin Maytal Medical sensors

Also Published As

Publication number Publication date
WO2011048556A2 (en) 2011-04-28

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