GB1516870A - Creación de Inventos y Patentes con Inteligencia Artificial

GB1516870A – Apparatus for use in measuring the volume flow of a medium flowing along a flowpath
– Google Patents

GB1516870A – Apparatus for use in measuring the volume flow of a medium flowing along a flowpath
– Google Patents
Apparatus for use in measuring the volume flow of a medium flowing along a flowpath

Info

Publication number
GB1516870A

GB1516870A
GB52205/75A
GB5220575A
GB1516870A
GB 1516870 A
GB1516870 A
GB 1516870A
GB 52205/75 A
GB52205/75 A
GB 52205/75A
GB 5220575 A
GB5220575 A
GB 5220575A
GB 1516870 A
GB1516870 A
GB 1516870A
Authority
GB
United Kingdom
Prior art keywords
volume
doppler
flow
switch
doppler signals
Prior art date
1974-12-23
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
GB52205/75A
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.)

Siemens AG

Original Assignee
Siemens 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.)
1974-12-23
Filing date
1975-12-19
Publication date
1978-07-05

1975-12-19
Application filed by Siemens AG
filed
Critical
Siemens AG

1978-07-05
Publication of GB1516870A
publication
Critical
patent/GB1516870A/en

Status
Expired
legal-status
Critical
Current

Links

Espacenet

Global Dossier

Discuss

Classifications

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

A—HUMAN NECESSITIES

A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE

A61B—DIAGNOSIS; SURGERY; IDENTIFICATION

A61B8/00—Diagnosis using ultrasonic, sonic or infrasonic waves

A61B8/06—Measuring blood flow

Abstract

1516870 Measuring volume flow SIEMENS A G 19 Dec 1975 [23 Dec 1974] 52205/75 Heading G1G For use in measuring the volume flow of a medium flowing along a flow-path, e.g. blood in an artery, two signals are produced respectively indicating the powers of two Doppler signals, one of these Doppler signals being received from the whole of an irradiated volume of the interior of a length of the flow-path and the other Doppler signal being received from an irradiated portion of said volume. The volume flow Q can then be determined according to the following equation:- where P m and Pp are the powers of the Doppler signals from the whole volume and portion respectively, V p is the volume of the portion, b is the length of the flow-path, and # is the flow-rate of the medium. As shown in Fig. 1, an ultrasonic transducer I consists of two thin Piezo-electric crystal wafers 3, 4. In operation, the blood vessel 7 is first located by closing switch 13 to energize generator 3, connecting switch 17 to line 19, and moving the transducer 1 over the skin until the Doppler signals indicated by an indicator 34 have a maximum intensity. The ultrasonic beam 6 then penetrates exactly through the centre of the vessel 7. Switch 17 is then returned to the position shown so that the Doppler signals from generator 3 are applied to a gate 18 which receives at its other input a pulse signal from a monostable device 22 which is triggered by the output pulse of a monostable device 23. The durations of the pulses from the devices 22, 23 are then adjusted so that the gate 18 passes Doppler signals received only from the volume portion V p . The switch 26 is then moved to connect the output of the Doppler unit 20, 21, (demodulator 20, power meter 21), to a storage element 27 which stores the power of the Doppler signals from the volume portion Vp. Next, the switch 14 is also closed so that both generators 3, 4 are energized, the switch 17 is connected to line 19 so that the Doppler signals from the whole of the volume are applied to the Doppler unit 20, 21, and the switch 26 connects the output of the Doppler unit to a dividing element 28 which then provides an output signal indicative of the ratio of the powers of the Doppler signals to a multiplier 29 which applies a signal representing V p /b . Pm/P p to a further multiplier 32. If the beams make an angle α with the vessel 7, a signal # sin α is applied to multiplier 32 whose output represents the volume flow and is applied to an indicator 33. For measurement of volume flow in a curved blood vessel, the ultrasonic beams are injected in the longitudinal direction of the arch as shown in Fig. 2. In this case the gate 18 must be used for both the total volume measurement and the portion measurement and its opening time is preferably the same for both measurements. The volume flow is then determined according to the equation, where Fp is the cross-sectional area of the volume portion V p .

GB52205/75A
1974-12-23
1975-12-19
Apparatus for use in measuring the volume flow of a medium flowing along a flowpath

Expired

GB1516870A
(en)

Applications Claiming Priority (1)

Application Number
Priority Date
Filing Date
Title

DE2461264A

DE2461264C3
(en)

1974-12-23
1974-12-23

Device for measuring the volume flow of flowing media

Publications (1)

Publication Number
Publication Date

GB1516870A
true

GB1516870A
(en)

1978-07-05

Family
ID=5934478
Family Applications (1)

Application Number
Title
Priority Date
Filing Date

GB52205/75A
Expired

GB1516870A
(en)

1974-12-23
1975-12-19
Apparatus for use in measuring the volume flow of a medium flowing along a flowpath

Country Status (7)

Country
Link

US
(1)

US3977247A
(en)

JP
(1)

JPS5833485B2
(en)

AT
(1)

AT345957B
(en)

DE
(1)

DE2461264C3
(en)

FR
(1)

FR2296165A1
(en)

GB
(1)

GB1516870A
(en)

NL
(1)

NL7512723A
(en)

Families Citing this family (18)

* Cited by examiner, † Cited by third party

Publication number
Priority date
Publication date
Assignee
Title

US4142412A
(en)

1976-05-12
1979-03-06
Sutures Inc.
Doppler flow meter and method

US4259870A
(en)

1979-02-26
1981-04-07
Howmedica Inc.
Doppler method of measuring flow

DE2911258C2
(en)

1979-03-22
1982-09-23
Chmiel, Horst, Prof. Dr.-Ing., 7250 Leonberg

Device for the non-invasive measurement of blood flow velocity using the ultrasonic Doppler effect method

JPS55143132A
(en)

1979-04-26
1980-11-08
Kuniyasu Furuhira
Measuring device for medical treatment

DE3147197C2
(en)

1981-11-27
1984-12-06
Siemens AG, 1000 Berlin und 8000 München

Method and device for performing flow measurements on flowing media according to the ultrasonic Doppler method

US4476874A
(en)

1982-06-01
1984-10-16
Sri International
Ultrasonic imaging with volume flow measuring method and apparatus

US4515164A
(en)

1984-03-23
1985-05-07
Intech Systems Corp.
Differential doppler for blood flow measurement

DE3434740A1
(en)

1984-09-21
1986-04-03
Rudolf 6270 Idstein Mauser

DIAGNOSTIC DEVICE

US4807636A
(en)

1986-09-09
1989-02-28
Vital Science Corporation
Method and apparatus for measuring volume fluid flow

DE3637549A1
(en)

1986-11-04
1988-05-11
Hans Dr Med Rosenberger
Measuring device for testing the dielectric properties of biological tissues

US4926875A
(en)

1988-01-25
1990-05-22
Baylor College Of Medicine
Implantable and extractable biological sensor probe

US4947854A
(en)

1988-09-13
1990-08-14
Baylor College Of Medicine
Epicardial multifunctional probe

US5085220A
(en)

1989-10-05
1992-02-04
Spacelabs, Inc.
Doppler flow sensing device and method for its use

US5247938A
(en)

1990-01-11
1993-09-28
University Of Washington
Method and apparatus for determining the motility of a region in the human body

NZ243294A
(en)

1991-06-25
1995-04-27
Commw Scient Ind Res Org
Time of flight of acoustic wave packets through fluid: reduction of higher order acoustic mode effects

FR2695999B1
(en)

1992-09-21
1994-12-30
Inst Nat Sante Rech Med

Ultrasonic probe to accurately determine the speed of a liquid and, in particular, the aortic flow.

FR2696000B1
(en)

1992-09-21
1994-12-09
Inst Nat Sante Rech Med

Method for precisely determining the speed of a liquid medium and, in particular, the aortic flow with an intracorporeal probe.

EP0595666B1
(en)

1992-09-21
1999-12-01
Institut National De La Sante Et De La Recherche Medicale (Inserm)
Probe and procedure for a precise determination of velocity or flow of a liquid

Family Cites Families (2)

* Cited by examiner, † Cited by third party

Publication number
Priority date
Publication date
Assignee
Title

FR1539652A
(en)

1967-04-07
1968-09-20
Comp Generale Electricite

Blood vessel recording flowmeter

DE1791191C3
(en)

1968-09-28
1974-08-22
Siemens Ag, 1000 Berlin Und 8000 Muenchen

Device for determining the speed of blood flow

1974

1974-12-23
DE
DE2461264A
patent/DE2461264C3/en
not_active
Expired

1975

1975-10-22
AT
AT804875A
patent/AT345957B/en
not_active
IP Right Cessation

1975-10-30
NL
NL7512723A
patent/NL7512723A/en
not_active
Application Discontinuation

1975-12-17
US
US05/641,572
patent/US3977247A/en
not_active
Expired – Lifetime

1975-12-19
GB
GB52205/75A
patent/GB1516870A/en
not_active
Expired

1975-12-19
FR
FR7539018A
patent/FR2296165A1/en
active
Granted

1975-12-23
JP
JP50153892A
patent/JPS5833485B2/en
not_active
Expired

Also Published As

Publication number
Publication date

US3977247A
(en)

1976-08-31

JPS5833485B2
(en)

1983-07-20

DE2461264A1
(en)

1976-06-24

ATA804875A
(en)

1978-02-15

FR2296165A1
(en)

1976-07-23

DE2461264C3
(en)

1978-06-01

AT345957B
(en)

1978-10-10

JPS5189463A
(en)

1976-08-05

DE2461264B2
(en)

1977-10-06

NL7512723A
(en)

1976-06-25

FR2296165B1
(en)

1978-05-19

Información de contacto