GB1445410A - Blood testing method - Google Patents

Blood testing method

Info

Publication number
GB1445410A
GB1445410A GB3850773A GB3850773A GB1445410A GB 1445410 A GB1445410 A GB 1445410A GB 3850773 A GB3850773 A GB 3850773A GB 3850773 A GB3850773 A GB 3850773A GB 1445410 A GB1445410 A GB 1445410A
Authority
GB
United Kingdom
Prior art keywords
collector
blood
aug
transducer
logic circuit
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
GB3850773A
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.)
B Braun Melsungen AG
Original Assignee
B Braun Melsungen AG
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 B Braun Melsungen AG filed Critical B Braun Melsungen AG
Publication of GB1445410A publication Critical patent/GB1445410A/en
Expired legal-status Critical Current

Links

Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B8/00—Diagnosis using ultrasonic, sonic or infrasonic waves
    • A61B8/42—Details of probe positioning or probe attachment to the patient
    • A61B8/4272—Details of probe positioning or probe attachment to the patient involving the acoustic interface between the transducer and the tissue
    • A61B8/4281—Details of probe positioning or probe attachment to the patient involving the acoustic interface between the transducer and the tissue characterised by sound-transmitting media or devices for coupling the transducer to the tissue
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B8/00—Diagnosis using ultrasonic, sonic or infrasonic waves
    • A61B8/48—Diagnostic techniques
    • A61B8/481—Diagnostic techniques involving the use of contrast agent, e.g. microbubbles introduced into the bloodstream
    • 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
    • A61M1/00—Suction or pumping devices for medical purposes; Devices for carrying-off, for treatment of, or for carrying-over, body-liquids; Drainage systems
    • A61M1/36—Other treatment of blood in a by-pass of the natural circulatory system, e.g. temperature adaptation, irradiation ; Extra-corporeal blood circuits
    • A61M1/3621—Extra-corporeal blood circuits
    • A61M1/3626—Gas bubble detectors
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
    • G01N29/02—Analysing fluids
    • G01N29/032—Analysing fluids by measuring attenuation of acoustic waves
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
    • G01N29/22—Details, e.g. general constructional or apparatus details
    • G01N29/223—Supports, positioning or alignment in fixed situation
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
    • G01N29/34—Generating the ultrasonic, sonic or infrasonic waves, e.g. electronic circuits specially adapted therefor
    • G01N29/346—Generating the ultrasonic, sonic or infrasonic waves, e.g. electronic circuits specially adapted therefor with amplitude characteristics, e.g. modulated signal
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
    • G01N29/34—Generating the ultrasonic, sonic or infrasonic waves, e.g. electronic circuits specially adapted therefor
    • G01N29/348—Generating the ultrasonic, sonic or infrasonic waves, e.g. electronic circuits specially adapted therefor with frequency characteristics, e.g. single frequency signals, chirp signals
    • 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
    • A61M2205/00—General characteristics of the apparatus
    • A61M2205/33—Controlling, regulating or measuring
    • A61M2205/3375—Acoustical, e.g. ultrasonic, measuring means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L2101/00—Uses or applications of pigs or moles
    • F16L2101/30—Inspecting, measuring or testing
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2291/00—Indexing codes associated with group G01N29/00
    • G01N2291/02—Indexing codes associated with the analysed material
    • G01N2291/024—Mixtures
    • G01N2291/02433—Gases in liquids, e.g. bubbles, foams
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2291/00—Indexing codes associated with group G01N29/00
    • G01N2291/10—Number of transducers
    • G01N2291/102—Number of transducers one emitter, one receiver

Landscapes

  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Physics & Mathematics (AREA)
  • General Health & Medical Sciences (AREA)
  • Pathology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • General Physics & Mathematics (AREA)
  • Public Health (AREA)
  • Engineering & Computer Science (AREA)
  • Biomedical Technology (AREA)
  • Immunology (AREA)
  • Biochemistry (AREA)
  • Analytical Chemistry (AREA)
  • Chemical & Material Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • Veterinary Medicine (AREA)
  • Surgery (AREA)
  • Biophysics (AREA)
  • Radiology & Medical Imaging (AREA)
  • Molecular Biology (AREA)
  • Medical Informatics (AREA)
  • Acoustics & Sound (AREA)
  • Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
  • Hematology (AREA)
  • Vascular Medicine (AREA)
  • Cardiology (AREA)
  • Anesthesiology (AREA)
  • Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
  • External Artificial Organs (AREA)
  • Investigating Or Analysing Biological Materials (AREA)
  • Infusion, Injection, And Reservoir Apparatuses (AREA)

Abstract

1445410 Acoustic detection of gas bubbles in liquid B BRAUN MELSUNGEN AG and F B VERACCHI 15 Aug 1973 [17 Aug 1972] 38507/73 Headings H4D and H4J The amount of free gas in blood contained in a hollow body is determined by measuring the attenuation of a sub-audio frequency (e.g. less than 10 Hz) acoustic signal transmitted through the blood. Figs. 1 and 2, show the application of the method to detecting bubbles in blood passing through the bubble-collector 1 of a haemodialyser. The collector is supported by a housing 4 having a hinged lid. The transmitting and receiving transducers 7, 8 each comprise an aluminium body 9 shaped to conform to the collector surface, and a piezoelectric element 10. The trandsucers are held in place by springs and are embedded in soft polyurethane 11. Transducer 7 is energized by a phase and amplitude modulated pulse. The signal received by transducer 7 is adjustably amplified then converted to digital form for processing in a logic circuit. The logic circuit operation is synchronized with the transmitted signal to suppress spurious signals.
GB3850773A 1972-08-17 1973-08-15 Blood testing method Expired GB1445410A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2240342A DE2240342B2 (en) 1972-08-17 1972-08-17 Device for acoustic detection of gas bubbles in liquids with corpuscular components

Publications (1)

Publication Number Publication Date
GB1445410A true GB1445410A (en) 1976-08-11

Family

ID=5853734

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3850773A Expired GB1445410A (en) 1972-08-17 1973-08-15 Blood testing method

Country Status (12)

Country Link
JP (1) JPS4960596A (en)
AT (1) AT347008B (en)
AU (1) AU470501B2 (en)
BE (1) BE802644A (en)
CH (1) CH556538A (en)
DD (1) DD106228A5 (en)
DE (1) DE2240342B2 (en)
FR (1) FR2198640A5 (en)
GB (1) GB1445410A (en)
IT (1) IT991410B (en)
NL (1) NL7310448A (en)
SE (1) SE396477B (en)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4068521A (en) * 1976-07-22 1978-01-17 Renal Systems, Inc. Ultrasonic air and blood foam detector
US4237720A (en) * 1978-08-07 1980-12-09 Rhode Island Hospital Ultrasonic particulate sensing
JPS568544A (en) * 1979-07-02 1981-01-28 Fuji Photo Film Co Ltd Method and device for detection of bubble in liquid
CA1187975A (en) * 1980-03-31 1985-05-28 Leigh R. Abts Ultrasonic method and apparatus for obtaining information about fluids
DE3421176A1 (en) * 1984-06-07 1985-12-19 Sartorius GmbH, 3400 Göttingen Device for the acoustic detection of gas bubbles in liquids such as blood or infusion solutions
IT1179808B (en) * 1984-10-31 1987-09-16 Hospal Dasco Spa DETECTION AND CONTROL EQUIPMENT FOR THE PRESENCE OF A GASEOUS FLUID IN CORRESPONDENCE WITH A PREFIXED LEVEL OF A LIQUID CONTAINER
IT8453987V0 (en) * 1984-10-31 1984-10-31 Hospal Dasco Spa DETECTOR DEVICE FOR THE PRESENCE OF FLUID IN CORRESPONDENCE WITH A PREFIXED LEVEL OF A LIQUID CONTAINER
DE4013402C2 (en) * 1990-04-26 1994-03-24 Infurex Ag Cham Method and device for detecting gas bubbles in a line filled with liquid, in particular a flexible, tubular line or a container
US5123275A (en) * 1990-12-07 1992-06-23 Ivac Corporation Air in-line sensor system
US5177993A (en) * 1991-07-22 1993-01-12 Ivac Corporation Air-in-line sensor
DE4313216C2 (en) * 1993-04-22 1995-12-14 Max Planck Gesellschaft Ultrasonic measuring device with at least one non-piezoelectric resonator chamber body and externally arranged electro-acoustic transducers
DE20101082U1 (en) * 2001-01-20 2002-05-29 Braun Melsungen Ag Ultrasonic sensor for the detection of gas bubbles

Also Published As

Publication number Publication date
AU5900273A (en) 1975-02-13
BE802644A (en) 1973-11-16
AU470501B2 (en) 1976-03-18
AT347008B (en) 1978-12-11
NL7310448A (en) 1974-02-19
DE2240342B2 (en) 1975-11-27
IT991410B (en) 1975-07-30
DD106228A5 (en) 1974-06-05
JPS4960596A (en) 1974-06-12
DE2240342A1 (en) 1974-03-07
SE396477B (en) 1977-09-19
CH556538A (en) 1974-11-29
ATA673873A (en) 1978-04-15
FR2198640A5 (en) 1974-03-29

Similar Documents

Publication Publication Date Title
GB1445410A (en) Blood testing method
GB1411223A (en) Apparatus and method for measuring the level of the contents of a container
ES489802A1 (en) Device for the non-invasive measurement of the state of microcirculating blood flow.
GB1472938A (en) Doppler effect speed measuring apparatus
JPS6465902A (en) Limit oscillator
ES395171A1 (en) Ultrasonic visualization
FR2318420A1 (en) Pressure or distance measurement using ultrasonics - involves compressible medium in which propagation velocity dependence on density is known
ES431029A1 (en) Device for producing mechanical waves
FR2411407A1 (en) DEVICE FOR MEASURING THE ACOUSTIC PROPERTIES OF A SAMPLE AND THEIR VARIATIONS
GB1507603A (en) Monitoring fluid flow through a duct
ES426809A1 (en) Acoustic log
FR2391456A1 (en) METHOD AND DEVICE FOR MEASURING FILLING DISTANCES OR HEIGHTS BY ACOUSTIC SOUNDING IN A GASEOUS FLUID BY MEANS OF SOUND WAVES
GB1238585A (en)
EP0382977A3 (en) Fluid level gauge
FR2273259A1 (en) Force or pressure measurement device - has parameter responsive surface wave emitter and frequency variation sensor
GB1322094A (en) Acoustic wave liquid-level measuring apparatus
JPS5250784A (en) Ultrasonic type flow and density meter
ES8400862A1 (en) Apparatus for ultrasonic investigation.
GB968465A (en) Electro-accoustic analysis of substances
GB1194694A (en) Ultrasonic Liquid/Fluid Interface Locating Apparatus and Method
SU723474A1 (en) Seismic signal receiver
GB1162428A (en) Improvements in or relating to Apparatuses for Digital Measurement of Distances by Means of Ultrasonic Pulses
FR2260780A1 (en) Liquid flow velocity measuring instrument - uses electro-acoustic devices to determine direction and intensity of velocity
GB1445151A (en) Apparatus for determining the wall thickness of specimens such as plates or the like by ultrasonic methods
SU482670A1 (en) Device for measuring the speed of propagation of ultrasound

Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee