GB1271361A - Means and method for signalling change of fluid flow - Google Patents

Means and method for signalling change of fluid flow

Info

Publication number
GB1271361A
GB1271361A GB34537/68A GB3453768A GB1271361A GB 1271361 A GB1271361 A GB 1271361A GB 34537/68 A GB34537/68 A GB 34537/68A GB 3453768 A GB3453768 A GB 3453768A GB 1271361 A GB1271361 A GB 1271361A
Authority
GB
United Kingdom
Prior art keywords
tube
monitoring
turbulence
fed
arm
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
GB34537/68A
Inventor
Raymond George Gosling
David Henry King
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 GB34537/68A priority Critical patent/GB1271361A/en
Priority to US843602A priority patent/US3641994A/en
Publication of GB1271361A publication Critical patent/GB1271361A/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
    • A61B5/68—Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient
    • A61B5/6846—Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient specially adapted to be brought in contact with an internal body part, i.e. invasive
    • A61B5/6867—Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient specially adapted to be brought in contact with an internal body part, i.e. invasive specially adapted to be attached or implanted in a specific body part
    • A61B5/6876—Blood vessel
    • 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
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/68—Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient
    • A61B5/6846—Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient specially adapted to be brought in contact with an internal body part, i.e. invasive
    • A61B5/6879—Means for maintaining contact with the body
    • A61B5/6884—Clamps or clips
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F1/00—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
    • G01F1/66—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by measuring frequency, phase shift or propagation time of electromagnetic or other waves, e.g. using ultrasonic flowmeters
    • G01F1/663—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by measuring frequency, phase shift or propagation time of electromagnetic or other waves, e.g. using ultrasonic flowmeters by measuring Doppler frequency shift

Landscapes

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

Abstract

1,271,361. Monitoring fluid flow-rate. R. G. GOSLING and D. H. KING. July 21, 1969, No.34537/68. Heading G1N. Apparatus for monitoring the flow of fluid past a surface comprises a transducer associated with the surface to produce an electric signal representative of the pressure variations due to turbulence, which may be already existing or artificially promoted. As shown, Fig. 1, for monitoring blood flow in a silastic tube 8 forming part of a dialysis shunt between an artery and a vein, the tube 8 sits in a stirrup part 7 of a body 4 attached by arm 5 to a leaf-spring 6 anchored at one end to a gramophone pick-up arm 1 with a Piezo-electric stylus 2. The pressure variations in tube 8 due to turbulence are converted to electrical signals which are fed to an amplifier and earphones and also rectified and fed to a Schmitt trigger circuit to operate an alarm when the flowrate falls below a predetermined value.
GB34537/68A 1968-07-19 1968-07-19 Means and method for signalling change of fluid flow Expired GB1271361A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB34537/68A GB1271361A (en) 1968-07-19 1968-07-19 Means and method for signalling change of fluid flow
US843602A US3641994A (en) 1968-07-19 1969-07-22 Turbulence-sensing blood flowmeter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB34537/68A GB1271361A (en) 1968-07-19 1968-07-19 Means and method for signalling change of fluid flow

Publications (1)

Publication Number Publication Date
GB1271361A true GB1271361A (en) 1972-04-19

Family

ID=10366860

Family Applications (1)

Application Number Title Priority Date Filing Date
GB34537/68A Expired GB1271361A (en) 1968-07-19 1968-07-19 Means and method for signalling change of fluid flow

Country Status (2)

Country Link
US (1) US3641994A (en)
GB (1) GB1271361A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8088091B2 (en) 2009-03-09 2012-01-03 New Jersey Institute Of Technology No clog shunt using a compact fluid drag path
US10226193B2 (en) 2015-03-31 2019-03-12 Medtronic Ps Medical, Inc. Wireless pressure measurement and monitoring for shunts

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
USRE30750E (en) * 1972-05-15 1981-09-29 Cardiac Resuscitator Corporation Cardiac resuscitator and monitoring apparatus
US4088138A (en) * 1974-01-02 1978-05-09 Cardiac Resuscitator Corp. Cardiac resuscitator and monitoring apparatus
GB1418181A (en) * 1973-02-27 1975-12-17 Cole E M Ultrasonic detection of inclusions in a fluid flowing within a tube
US3958458A (en) * 1974-08-26 1976-05-25 Grumman Aerospace Corporation Acoustic emission flow measurement system
US4166455A (en) * 1978-01-25 1979-09-04 Howmedica Inc. Apparatus and method for non-invasive detection of strictures in conductive fluid conduits
US5394732A (en) * 1993-09-10 1995-03-07 Cobe Laboratories, Inc. Method and apparatus for ultrasonic detection of air bubbles
DE19528907C1 (en) * 1995-08-05 1996-11-07 Fresenius Ag Haemodynamic parameter measurement equipment for extracorporeal blood circulation appts.
US5690115A (en) * 1995-09-21 1997-11-25 Feldman; Charles L. Detecting vascular stenosis in chronic hemodialysis patients
US20050119573A1 (en) * 2003-11-05 2005-06-02 Boris Vilenkin Method and system for quantification of arterial stenosis
US8033157B2 (en) 2007-10-01 2011-10-11 Baxter International Inc. Medical fluid air bubble detection apparatus and method
SE536017C2 (en) * 2010-10-12 2013-04-02 Braennstroem Gruppen Ab Method and apparatus for indicating a fluid flow
US11844893B2 (en) 2021-01-17 2023-12-19 Inspire M.D Ltd. Shunts with blood-flow indicators

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3002185A (en) * 1961-09-26 Low frequency pulse detector
US2658505A (en) * 1949-03-08 1953-11-10 Sheer Charles Arterial pulse wave velocity meter
US2936619A (en) * 1958-07-10 1960-05-17 Gulton Ind Inc Device for measuring liquid flow
US3017885A (en) * 1959-03-30 1962-01-23 Robicsek Francis Blood flow meter
US3189023A (en) * 1962-05-11 1965-06-15 Salz Paul Blood pressure indicating device
US3403672A (en) * 1965-02-23 1968-10-01 Statham Instrument Inc Periarterial blood flow and blood pressure measuring devices

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8088091B2 (en) 2009-03-09 2012-01-03 New Jersey Institute Of Technology No clog shunt using a compact fluid drag path
US10226193B2 (en) 2015-03-31 2019-03-12 Medtronic Ps Medical, Inc. Wireless pressure measurement and monitoring for shunts
US11375915B2 (en) 2015-03-31 2022-07-05 Medtronic Navigation, Inc. Wireless pressure measurement and monitoring for shunts
US11844597B2 (en) 2015-03-31 2023-12-19 Medtronic Navigation, Inc. Wireless pressure measurement and monitoring for shunts

Also Published As

Publication number Publication date
US3641994A (en) 1972-02-15

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