FR2105327A5 - Pressure gauge - esp for blood, using a liquid crystal - Google Patents

Pressure gauge - esp for blood, using a liquid crystal

Info

Publication number
FR2105327A5
FR2105327A5 FR7031749A FR7031749A FR2105327A5 FR 2105327 A5 FR2105327 A5 FR 2105327A5 FR 7031749 A FR7031749 A FR 7031749A FR 7031749 A FR7031749 A FR 7031749A FR 2105327 A5 FR2105327 A5 FR 2105327A5
Authority
FR
France
Prior art keywords
liquid crystal
source
esp
blood
pressure gauge
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.)
Expired
Application number
FR7031749A
Other languages
French (fr)
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to FR7031749A priority Critical patent/FR2105327A5/en
Application granted granted Critical
Publication of FR2105327A5 publication Critical patent/FR2105327A5/en
Expired 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 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
    • A61B5/021—Measuring pressure in heart or blood vessels
    • A61B5/0215—Measuring pressure in heart or blood vessels by means inserted into the body
    • A61B5/02154—Measuring pressure in heart or blood vessels by means inserted into the body by optical transmission
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L11/00—Measuring steady or quasi-steady pressure of a fluid or a fluent solid material by means not provided for in group G01L7/00 or G01L9/00
    • G01L11/02—Measuring steady or quasi-steady pressure of a fluid or a fluent solid material by means not provided for in group G01L7/00 or G01L9/00 by optical means
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M25/00—Catheters; Hollow probes
    • A61M2025/0001—Catheters; Hollow probes for pressure measurement
    • A61M2025/0002—Catheters; Hollow probes for pressure measurement with a pressure sensor at the distal end

Landscapes

  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Cardiology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Medical Informatics (AREA)
  • Biophysics (AREA)
  • Pathology (AREA)
  • Engineering & Computer Science (AREA)
  • Biomedical Technology (AREA)
  • Vascular Medicine (AREA)
  • Physiology (AREA)
  • Molecular Biology (AREA)
  • Surgery (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • General Physics & Mathematics (AREA)
  • Measuring Pulse, Heart Rate, Blood Pressure Or Blood Flow (AREA)

Abstract

Pressure variations are transformed into variations in an electric current using a piezoelectric element (comprising a liquid crystal in a supple envelope) lit by a source whose beam is measured by a photoelectric detector after its passage through the crystal. The small size and high accuracy allows the device to be used in measuring blood pressure in vivo. It may comprise the liquid crystal at one end of an optical fibre and the light source, a semi-transparent plate (at 45 degrees to the source) and the detector (at 90 degrees to the source).
FR7031749A 1970-09-01 1970-09-01 Pressure gauge - esp for blood, using a liquid crystal Expired FR2105327A5 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7031749A FR2105327A5 (en) 1970-09-01 1970-09-01 Pressure gauge - esp for blood, using a liquid crystal

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7031749A FR2105327A5 (en) 1970-09-01 1970-09-01 Pressure gauge - esp for blood, using a liquid crystal

Publications (1)

Publication Number Publication Date
FR2105327A5 true FR2105327A5 (en) 1972-04-28

Family

ID=9060772

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7031749A Expired FR2105327A5 (en) 1970-09-01 1970-09-01 Pressure gauge - esp for blood, using a liquid crystal

Country Status (1)

Country Link
FR (1) FR2105327A5 (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2354307A1 (en) * 1973-10-27 1975-05-07 Riedel De Haen Ag Pressure measurement using cholesteric mesophase - with reversibly pressure-dependent reflection colours, for accuracy and simplicity
DE2920489A1 (en) * 1978-06-02 1979-12-06 Asea Ab FIBER OPTICAL MEASURING DEVICE
DE2934859A1 (en) * 1978-09-15 1980-03-27 Asea Ab OPTICAL MEASURING DEVICE
FR2456314A1 (en) * 1979-05-10 1980-12-05 Jean Berny Micro-displacement gauge for medical use - employs catheter pressure sensor containing deformable mirror with optical fibre to conduct light
US11583227B2 (en) 2018-11-11 2023-02-21 Biobeat Technologies Ltd. Wearable apparatus and method for monitoring medical properties

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2354307A1 (en) * 1973-10-27 1975-05-07 Riedel De Haen Ag Pressure measurement using cholesteric mesophase - with reversibly pressure-dependent reflection colours, for accuracy and simplicity
DE2920489A1 (en) * 1978-06-02 1979-12-06 Asea Ab FIBER OPTICAL MEASURING DEVICE
DE2934859A1 (en) * 1978-09-15 1980-03-27 Asea Ab OPTICAL MEASURING DEVICE
FR2456314A1 (en) * 1979-05-10 1980-12-05 Jean Berny Micro-displacement gauge for medical use - employs catheter pressure sensor containing deformable mirror with optical fibre to conduct light
US11583227B2 (en) 2018-11-11 2023-02-21 Biobeat Technologies Ltd. Wearable apparatus and method for monitoring medical properties

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Legal Events

Date Code Title Description
ST Notification of lapse