SE8901358D0 - PUT TO MEET THE FLOW IN A BLOOD BLOOD AND DEVICE - Google Patents

PUT TO MEET THE FLOW IN A BLOOD BLOOD AND DEVICE

Info

Publication number
SE8901358D0
SE8901358D0 SE8901358A SE8901358A SE8901358D0 SE 8901358 D0 SE8901358 D0 SE 8901358D0 SE 8901358 A SE8901358 A SE 8901358A SE 8901358 A SE8901358 A SE 8901358A SE 8901358 D0 SE8901358 D0 SE 8901358D0
Authority
SE
Sweden
Prior art keywords
blood
vessel
conduit
disturbance
flow
Prior art date
Application number
SE8901358A
Other languages
Swedish (sv)
Inventor
Aa Oeberg
Original Assignee
Radi Medical System
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 Radi Medical System filed Critical Radi Medical System
Priority to SE8901358A priority Critical patent/SE8901358D0/en
Publication of SE8901358D0 publication Critical patent/SE8901358D0/en
Priority to PCT/SE1990/000244 priority patent/WO1990012537A1/en

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

Abstract

The invention refers to a method and an apparatus which in situ measure the flow in a blood vessel mean (9). A local disturbance of the optical properties of the blood is performed at the measuring place. The disturbance is optically detected by means of an optical conduit (1) introduced into the vessel, the field of view of the conduit being directed towards the central portion of the vessel. The detected optical signal is used to form a measure of the flow. The device comprises a conduit introduced into the vessel up to the measuring place. A fibre optical light conductor (7) is provided within the conduit. According to the invention the end surface of the light conductor is bevelled to look into the central portion of the blood vessel. A light detector (7) is provided in the proximal end of the light conductor and detects the local disturbance of the optical properties of the blood. The disturbance may be brought about by introducing a fluorescent substance into the blood or by making use of the autofluorescence of the blood. Disturbances may also be brought about by locally producing microbubbles in the blood upstreams of the measuring position or by locally disturbing the orientation of the blood corpuscles.
SE8901358A 1989-04-14 1989-04-14 PUT TO MEET THE FLOW IN A BLOOD BLOOD AND DEVICE SE8901358D0 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
SE8901358A SE8901358D0 (en) 1989-04-14 1989-04-14 PUT TO MEET THE FLOW IN A BLOOD BLOOD AND DEVICE
PCT/SE1990/000244 WO1990012537A1 (en) 1989-04-14 1990-04-09 Method of measuring the flow within a blood vessel and device for performing the method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE8901358A SE8901358D0 (en) 1989-04-14 1989-04-14 PUT TO MEET THE FLOW IN A BLOOD BLOOD AND DEVICE

Publications (1)

Publication Number Publication Date
SE8901358D0 true SE8901358D0 (en) 1989-04-14

Family

ID=20375677

Family Applications (1)

Application Number Title Priority Date Filing Date
SE8901358A SE8901358D0 (en) 1989-04-14 1989-04-14 PUT TO MEET THE FLOW IN A BLOOD BLOOD AND DEVICE

Country Status (2)

Country Link
SE (1) SE8901358D0 (en)
WO (1) WO1990012537A1 (en)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5706808A (en) * 1995-01-31 1998-01-13 Kleinerman; Marcos Y. Fiber optic system for measuring cardiac output
WO1997012210A1 (en) * 1995-09-29 1997-04-03 Swee Chuan Tjin Fiber optic catheter for accurate flow measurements
US6325762B1 (en) 1996-12-09 2001-12-04 Swee Chuan Tjin Method and apparatus for continuous cardiac output monitoring
US20080058647A1 (en) * 2003-07-25 2008-03-06 Koninklijke Philips Electronics N.V. Means for Performing Measurements in a Vessel
US10426361B2 (en) 2013-06-14 2019-10-01 Novadaq Technologies ULC Quantification of absolute blood flow in tissue using fluorescence-mediated photoplethysmography
CN105658138B (en) * 2013-06-14 2020-06-16 诺瓦达克技术公司 Quantification of absolute blood flow in tissue using fluorescence-mediated photoplethysmography
EP3352670B8 (en) 2015-09-23 2024-07-03 Stryker Corporation Method and system for assessing healing of tissue
WO2017139881A1 (en) 2016-02-16 2017-08-24 Novadaq Technologies Inc. Facilitating assessment of blood flow and tissue perfusion using fluorescence-mediated photoplethysmography

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3068742A (en) * 1959-06-15 1962-12-18 American Optical Corp Means for performing colorimetry
US3674013A (en) * 1970-09-30 1972-07-04 American Optical Corp Fiberoptic catheter
EP0059032A1 (en) * 1981-02-03 1982-09-01 Virgil B. Elings Measurement of dye concentration in the bloodstream
US4341223A (en) * 1981-02-04 1982-07-27 Lutz Lauralee A Fluoresceable composition and method of determining fluid flow
DE3142075C2 (en) * 1981-10-23 1987-02-12 Drägerwerk AG, 2400 Lübeck Puncture probe
US4487075A (en) * 1983-04-15 1984-12-11 The United States Of America As Represented By The United States Department Of Energy Hydraulic flow visualization method and apparatus
WO1985003855A1 (en) * 1984-03-08 1985-09-12 Optical Technologies, Inc. Fluid flow sensing apparatus for in vivo and industrial applications emloying novel differential optical fiber pressure sensors
US4641658A (en) * 1984-10-01 1987-02-10 American Hospital Supply Corp. Cardiac flow monitor
US4691709A (en) * 1986-07-01 1987-09-08 Cordis Corporation Apparatus for measuring velocity of blood flow in a blood vessel

Also Published As

Publication number Publication date
WO1990012537A1 (en) 1990-11-01

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