GB969941A - An apparatus for examining specimens comprising light conducting fibres - Google Patents

An apparatus for examining specimens comprising light conducting fibres

Info

Publication number
GB969941A
GB969941A GB3935362A GB3935362A GB969941A GB 969941 A GB969941 A GB 969941A GB 3935362 A GB3935362 A GB 3935362A GB 3935362 A GB3935362 A GB 3935362A GB 969941 A GB969941 A GB 969941A
Authority
GB
United Kingdom
Prior art keywords
light
blood
fibres
probe
groups
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
GB3935362A
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.)
THOMAS BALLANTYNE CLERK
Original Assignee
THOMAS BALLANTYNE CLERK
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 THOMAS BALLANTYNE CLERK filed Critical THOMAS BALLANTYNE CLERK
Priority to GB3935362A priority Critical patent/GB969941A/en
Publication of GB969941A publication Critical patent/GB969941A/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
    • A61B5/145—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
    • A61B5/1459—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 invasive, e.g. introduced into the body by a catheter
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B23/00—Telescopes, e.g. binoculars; Periscopes; Instruments for viewing the inside of hollow bodies; Viewfinders; Optical aiming or sighting devices
    • G02B23/24—Instruments or systems for viewing the inside of hollow bodies, e.g. fibrescopes
    • G02B23/26—Instruments or systems for viewing the inside of hollow bodies, e.g. fibrescopes using light guides
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/04—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings formed by bundles of fibres
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/24—Coupling light guides
    • G02B6/26—Optical coupling means
    • G02B6/28—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals
    • G02B6/2804—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals forming multipart couplers without wavelength selective elements, e.g. "T" couplers, star couplers

Landscapes

  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Molecular Biology (AREA)
  • Pathology (AREA)
  • Engineering & Computer Science (AREA)
  • Biomedical Technology (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Medical Informatics (AREA)
  • Biophysics (AREA)
  • Surgery (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Astronomy & Astrophysics (AREA)
  • Investigating Or Analysing Materials By Optical Means (AREA)
  • Investigating Or Analysing Biological Materials (AREA)

Abstract

969,941. Surgical optical instruments. T. B. CLERK. (American Optical Co.). Oct. 17, 1962, No. 39353/62. Heading ASR. [Also in Division G2] A device for examining specimens, in particular of blood, comprising an elongated relatively thin fibre optical probe 10 (see Fig. 1), having a cross-section of such a size that the probe could be inserted into a blood vessel 28, the fibres being optically insulated from each other, and at one end of the probe the fibres are separated into two groups 20, 21 so that light can be passed down one of the groups 21 into the blood vessel and can be passed back up the other group 20, the other end of the probe having a thin-walled casing 11. In the embodiment shown, the casing is a hypardermic needle but in other embodiments it is a rubber tube and in Fig. 9 it is a plastic casing. The two groups of fibres when joined together may be placed side-by-side or coaxially relative to each other, the two being separated by insulating material, along at least part of their length. In the embodiment shown in Fig. 9 the light passes down tube 46, is reflected at mirror surface 49, 50, passes through a specimen of blood 51 flowing through a gap in the fibres and up through tube 47. In the colorimeter shown in Fig. 1, light from a source 12 is passed through filter 15 or filter 16, mounted on a slidable base 31, according to the required wavelength band, passes into the blood 29 as described above and is transmitted back to a photo-electric device 18 which measures the intensity of light falling on it. The blood comprises oxyhemoglobin and reduced hemoglobin which two components transmit different proportions of light at different wavelengths. Therefore by obtaining a reading from instrument 18 when the wavelength of light is such that both the blood component transmits it equally and another reading from the instrument 18 when the wavelength of light is such that the two components transmit by previously determined unequal amounts and comparing the two readings the oxygen saturation of the blood can be determined. In another embodiment the photoelectric device may be replaced by a magnifying piece. Specification 576,205 is referred to.
GB3935362A 1962-10-17 1962-10-17 An apparatus for examining specimens comprising light conducting fibres Expired GB969941A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB3935362A GB969941A (en) 1962-10-17 1962-10-17 An apparatus for examining specimens comprising light conducting fibres

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3935362A GB969941A (en) 1962-10-17 1962-10-17 An apparatus for examining specimens comprising light conducting fibres

Publications (1)

Publication Number Publication Date
GB969941A true GB969941A (en) 1964-09-16

Family

ID=10409093

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3935362A Expired GB969941A (en) 1962-10-17 1962-10-17 An apparatus for examining specimens comprising light conducting fibres

Country Status (1)

Country Link
GB (1) GB969941A (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0084216A1 (en) * 1981-10-26 1983-07-27 Dainichi-Nippon Cables, Ltd. Image guide
GB2123287A (en) * 1982-07-09 1984-02-01 Anna Gunilla Sutton Depilation device
EP0116980A1 (en) * 1983-02-22 1984-08-29 Sumitomo Electric Industries Limited Image fibers
GB2160331A (en) * 1984-06-15 1985-12-18 Bergwerksverband Gmbh Optical fibre endoscope for borehole investigation
DE3724749A1 (en) * 1986-07-29 1988-02-11 Mitsubishi Cable Ind Ltd FIBER OPTICAL LADDER AND IMAGE DEVICE USING THIS
US4772093A (en) * 1985-12-12 1988-09-20 Microvasive, Inc. Fiber-optic image-carrying device
GB2275348A (en) * 1993-02-20 1994-08-24 Secr Defence Optical fibre probe

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0084216A1 (en) * 1981-10-26 1983-07-27 Dainichi-Nippon Cables, Ltd. Image guide
GB2123287A (en) * 1982-07-09 1984-02-01 Anna Gunilla Sutton Depilation device
EP0116980A1 (en) * 1983-02-22 1984-08-29 Sumitomo Electric Industries Limited Image fibers
AU587929B2 (en) * 1983-02-22 1989-08-31 Sumitomo Electric Industries, Ltd. Image fibers
GB2160331A (en) * 1984-06-15 1985-12-18 Bergwerksverband Gmbh Optical fibre endoscope for borehole investigation
US4772093A (en) * 1985-12-12 1988-09-20 Microvasive, Inc. Fiber-optic image-carrying device
DE3724749A1 (en) * 1986-07-29 1988-02-11 Mitsubishi Cable Ind Ltd FIBER OPTICAL LADDER AND IMAGE DEVICE USING THIS
US4783135A (en) * 1986-07-29 1988-11-08 Mitsubishi Cable Industries, Ltd. Optical fiber conductor and image scope using same
GB2275348A (en) * 1993-02-20 1994-08-24 Secr Defence Optical fibre probe
GB2275348B (en) * 1993-02-20 1996-06-19 Secr Defence Optical sensors

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