US3824988A - Ultrasound doppler applicator - Google Patents

Ultrasound doppler applicator Download PDF

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Publication number
US3824988A
US3824988A US00328147A US32814773A US3824988A US 3824988 A US3824988 A US 3824988A US 00328147 A US00328147 A US 00328147A US 32814773 A US32814773 A US 32814773A US 3824988 A US3824988 A US 3824988A
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US
United States
Prior art keywords
applicator
ring
oscillators
accordance
receiving
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 - Lifetime
Application number
US00328147A
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English (en)
Inventor
R Soldner
G Naefe
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.)
Filing date
Publication date
Priority claimed from DE19722204474 external-priority patent/DE2204474C3/de
Application filed by Siemens AG filed Critical Siemens AG
Application granted granted Critical
Publication of US3824988A publication Critical patent/US3824988A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/03—Detecting, measuring or recording fluid pressure within the body other than blood pressure, e.g. cerebral pressure; Measuring pressure in body tissues or organs
    • A61B5/033—Uterine pressure
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B8/00—Diagnosis using ultrasonic, sonic or infrasonic waves
    • A61B8/02—Measuring pulse or heart rate
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B8/00—Diagnosis using ultrasonic, sonic or infrasonic waves
    • A61B8/08—Detecting organic movements or changes, e.g. tumours, cysts, swellings
    • A61B8/0866—Detecting organic movements or changes, e.g. tumours, cysts, swellings involving foetal diagnosis; pre-natal or peri-natal diagnosis of the baby
    • 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
    • A61B8/488—Diagnostic techniques involving Doppler signals

Definitions

  • This invention relates to an ultrasound Doppler applicator determining the movement of internal body parts the position of which is variable relatively to the applicator, particularly fetal heart movement.
  • Known applicators of this type are used for determining fetal heart movements.
  • the simplest applicator consists of two oscillators located close to each other, one of which functions as a sender and the other as a receiver.
  • Such an applicator has a comparatively sharp sending-receiving directional characteristic and is therefore not well suited for continuous supervision of fetal heart movement, since by movement of the fetus its heart can easily leave the range of the sound.
  • the signal output is comparatively small, since the receiving oscillator actually gets only echo signals from reflection surfaces perpendicular to the flow direction of the sound.
  • Another known applicator has a flat disc serving as a carrier for several receiving oscillators arranged in a concentric circle about a central sending oscillator.
  • This applicator makes possible the coverage of the entire possible movement range of the fetus and it also produces a higher signal output since the receiving oscillators grouped around the sending oscillator also register echo signals from surfaces with a certain inclination.
  • the flat, rigid disc with comparatively large surface is difficult to adapt to a body surface with different curvatures. 1
  • An object of the present invention is to provide an applicator which will also cover the entire movement range of the fetus but, as compared to prior art, will have a greater increase in signal output and at the same time can be coupled in a much simpler and safer manner to very curved body surfaces.
  • a ring can be much better adapted to curved soft surfaces than a disc.
  • the increased adaptability of the oscillator carrier provides a better and less critical coupling of the individual oscillators to the curved body surface.
  • a plurality of ultra sound sending oscillators located outside of the application center provide a much better space illumination of the object being examined (fetus hearts), with the result that the signal output will be further increased by a substantial amount.
  • the individual sending oscillators and receiving oscillators are arranged alternately upon the ring in a circle which is concentrical to the center of the ring.
  • the distances between the oscillators are made equal.
  • Such an applicator provides best receiving conditions for echo signals from a depth range of about 6 cm to 12 cm, namely, specifically for echo signals coming from the heart of the fetus (average distance of fetus from body surface is about 8 cm).
  • a pressure changer for example, a pressure balloon, fitting into the interior of the ring, for simultaneously receiving the tocogram of the circular ends.
  • the ring can be the member receiving the pressure changer or it can be a component part of the casing of the pressure changer.
  • FIG. 1 is a front view of an ultrasound Doppler applicator.
  • FIG. 1a is a section along the line A A of FIG. 1.
  • FIG. 2 is a front view of an applicator combined in a tocogram receiver.
  • FIG. 2a is a section along the line B B of FIG. 2.
  • the ultrasound Doppler applicator for determining fetal heart movements shown from the application side in FIG. 1, includes a total of three ultrasound sending oscillators 1, 2 and 3 and three receiving oscillators 4, 5 and 6 consisting of piezoelectrical crystal plates with a diameter of about 8 mm.
  • the oscillators are arranged as an alternating row upon a carrier member 7 having hollow spaces 7 for receiving the oscillators.
  • the carrier member 7 has an application surface 8 and a cover 9 which can be screwed on.
  • these parts form a ring 10 made of polystyrol.
  • the average diameter of the ring 10 amounts to 50 mm, its width is 9 mm and its total thickness is 10 mm.
  • the individual sending and receiving oscillators are electrically connected in parallel and work in continuous stroke or impulse operation.
  • Electrical conduits 11 and 12 are connecting lines of the individual sending oscillators or receiving oscillators with sending high frequency generator or Doppler device for indicating Doppler signals (both not shown).
  • An applicator combined with a tocogram receiver 13 is shown again from the application side in FIG. 2.
  • the tocogram receiver 13 consists of a pressure balloon 14 inserted into the round interior of the disc 10 and having a rigid casing part 15 and a balloon membrane 16.
  • the balloon 14 can be blown up by a pump (not shown) connected to' apressure conduit 17 to a desired volume or pressure value.
  • the conduit 17 also carries a mechanical-electrical pressure changer (not shown) for changing pressure variations in the balloon 14 into corresponding electrical signals (tocogram).
  • the described ultrasound Doppler applicator is used as follows:
  • the ring 10 is applied, for example, by means of an adhesive plaster to the stomach in such manner that the individual sending and receiving oscillators are in good contact with the skin.
  • the ultrasound waves emitted by the senders 1 to 3 are among others, reflected by the fetus heart and the reflected waves are transformed in the receiving oscillators 4 to 6 into corresponding electrical signals.
  • the frequency deviations resulting from 3' heart movements between the sent out ultra sound and the received ultra sound produce Doppler signals constituting a measure for the heart movementsof the fetus.
  • the heart frequency of the fetus can be determined directly from the following frequency of the appearing Doppler signals.
  • the tocogram namely the contraction signal of the woman.
  • the balloon 14 blown to a specific volume or pressure value is pressed into the interior of the ring so that the diaphragm 16 presses against the stomach of the woman.
  • An ultrasound Doppler applicator for determining which are moveable relatively to the applicator, particularly fetal heart movements, said applicator comprising a ring and a plurality of ultrasound sending oscillators and ultrasound receiving oscillators carried by said ring, said oscillators being distributed throughout the entire ring.
  • An applicator in accordance with claim 1, comprising means connecting the individual sending oscillators and receiving oscillators electrically in parallel.
  • said ring consists of an artificial material, preferably polystyrol.
  • An applicator in accordance with claim 1 comprising a pressure changer fitting into the interior of said ring for receiving a tocogram of an expectant mother.

Landscapes

  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Medical Informatics (AREA)
  • Surgery (AREA)
  • Pathology (AREA)
  • Veterinary Medicine (AREA)
  • Engineering & Computer Science (AREA)
  • Biomedical Technology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Biophysics (AREA)
  • Molecular Biology (AREA)
  • Public Health (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
  • Radiology & Medical Imaging (AREA)
  • Gynecology & Obstetrics (AREA)
  • Pregnancy & Childbirth (AREA)
  • Cardiology (AREA)
  • Hematology (AREA)
  • Acoustics & Sound (AREA)
  • Ultra Sonic Daignosis Equipment (AREA)
US00328147A 1972-01-31 1973-01-30 Ultrasound doppler applicator Expired - Lifetime US3824988A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19722204474 DE2204474C3 (de) 1972-01-31 Ultraschall-Doppler-Applikator zum Erfassen der Bewegung von körperinternen Objekten

Publications (1)

Publication Number Publication Date
US3824988A true US3824988A (en) 1974-07-23

Family

ID=5834574

Family Applications (1)

Application Number Title Priority Date Filing Date
US00328147A Expired - Lifetime US3824988A (en) 1972-01-31 1973-01-30 Ultrasound doppler applicator

Country Status (6)

Country Link
US (1) US3824988A (fr)
AT (1) AT318129B (fr)
CH (1) CH547627A (fr)
FR (1) FR2170007B1 (fr)
GB (1) GB1409201A (fr)
SE (2) SE388353B (fr)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1990004354A1 (fr) * 1988-10-17 1990-05-03 Hon Edward H Plaque support de capteur amelioree a anneau detachable
US4947853A (en) * 1985-09-26 1990-08-14 Hon Edward H Sensor support base and method of application
US4966152A (en) * 1987-07-21 1990-10-30 Hewlett-Packard Company Transducer
US5070888A (en) * 1985-09-26 1991-12-10 The Hon Group External uterine contraction monitoring device
WO1997003610A1 (fr) * 1995-07-21 1997-02-06 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Dispositif permettant de detecter des concretions et des bulles de cavitation
EP1266622A1 (fr) * 2001-05-30 2002-12-18 friendly sensors AG Capteur de déformation et/ou mouvement
EP1750587A1 (fr) * 2004-05-11 2007-02-14 Maternus Partners, Ltd. Appareil mobile de surveillance des contractions de travail et de la frequence cardiaque
WO2011023521A1 (fr) * 2009-08-27 2011-03-03 Siemens Aktiengesellschaft Dispositif de mesure de contraction utérine et système de surveillance fœtale
CN103654857A (zh) * 2013-12-04 2014-03-26 江南大学 一种胎心信号采集装置

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
LU86072A1 (fr) 1985-09-11 1987-04-02 Cobben Andree Ceinture de surveillance

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3156110A (en) * 1962-07-23 1964-11-10 Manfred E Clynes Ultrasonic detection and visualization of internal structure
US3439530A (en) * 1966-01-10 1969-04-22 Magnaflux Corp Multi-scan ultrasonic testing apparatus
US3721227A (en) * 1971-08-24 1973-03-20 Nulty D Mc Transducer for pulse-echo ultrasonic exploration

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB998173A (en) * 1963-02-04 1965-07-14 George Andrew Douglas Gordon Method and apparatus for destroying limited groups of cells
US3552382A (en) * 1968-01-11 1971-01-05 Hoffmann La Roche Ultrasonic transducer assembly for biological inspections
US3606879A (en) * 1968-06-17 1971-09-21 Electro Medical Systems Inc Monitoring the physiological phenomena of childbirth with ultrasound

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3156110A (en) * 1962-07-23 1964-11-10 Manfred E Clynes Ultrasonic detection and visualization of internal structure
US3439530A (en) * 1966-01-10 1969-04-22 Magnaflux Corp Multi-scan ultrasonic testing apparatus
US3721227A (en) * 1971-08-24 1973-03-20 Nulty D Mc Transducer for pulse-echo ultrasonic exploration

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
Wells, Med. & Biol. Engng. Vol. 8, 1970, pp. 241 256 *

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4947853A (en) * 1985-09-26 1990-08-14 Hon Edward H Sensor support base and method of application
US5070888A (en) * 1985-09-26 1991-12-10 The Hon Group External uterine contraction monitoring device
US4966152A (en) * 1987-07-21 1990-10-30 Hewlett-Packard Company Transducer
US4947865A (en) * 1987-11-09 1990-08-14 The Hon Group Sensor support plate with detachable ring
WO1990004354A1 (fr) * 1988-10-17 1990-05-03 Hon Edward H Plaque support de capteur amelioree a anneau detachable
WO1997003610A1 (fr) * 1995-07-21 1997-02-06 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Dispositif permettant de detecter des concretions et des bulles de cavitation
EP1266622A1 (fr) * 2001-05-30 2002-12-18 friendly sensors AG Capteur de déformation et/ou mouvement
US20030036858A1 (en) * 2001-05-30 2003-02-20 Arnd Friedrichs Apparatus for deformation and/or movement detection
EP1750587A1 (fr) * 2004-05-11 2007-02-14 Maternus Partners, Ltd. Appareil mobile de surveillance des contractions de travail et de la frequence cardiaque
EP1750587A4 (fr) * 2004-05-11 2009-08-19 Maternus Partners Ltd Appareil mobile de surveillance des contractions de travail et de la frequence cardiaque
WO2011023521A1 (fr) * 2009-08-27 2011-03-03 Siemens Aktiengesellschaft Dispositif de mesure de contraction utérine et système de surveillance fœtale
CN103654857A (zh) * 2013-12-04 2014-03-26 江南大学 一种胎心信号采集装置

Also Published As

Publication number Publication date
DE2204474B2 (de) 1976-10-21
SE7602152L (sv) 1976-02-23
GB1409201A (en) 1975-10-08
DE2204474A1 (de) 1973-08-16
FR2170007A1 (fr) 1973-09-14
AT318129B (de) 1974-09-25
SE388353B (sv) 1976-10-04
CH547627A (de) 1974-04-11
FR2170007B1 (fr) 1979-02-23

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