WO2000061007A1 - Cable de liaison pour appareil de surveillance a ultrasons - Google Patents

Cable de liaison pour appareil de surveillance a ultrasons Download PDF

Info

Publication number
WO2000061007A1
WO2000061007A1 PCT/GB2000/001414 GB0001414W WO0061007A1 WO 2000061007 A1 WO2000061007 A1 WO 2000061007A1 GB 0001414 W GB0001414 W GB 0001414W WO 0061007 A1 WO0061007 A1 WO 0061007A1
Authority
WO
WIPO (PCT)
Prior art keywords
probe
processor
interconnect cable
signals received
operable
Prior art date
Application number
PCT/GB2000/001414
Other languages
English (en)
Inventor
Mark Graham Blunden
Original Assignee
Deltex (Guernsey) Limited
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 Deltex (Guernsey) Limited filed Critical Deltex (Guernsey) Limited
Priority to AU44172/00A priority Critical patent/AU4417200A/en
Publication of WO2000061007A1 publication Critical patent/WO2000061007A1/fr

Links

Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B8/00—Diagnosis using ultrasonic, sonic or infrasonic waves
    • A61B8/12—Diagnosis using ultrasonic, sonic or infrasonic waves in body cavities or body tracts, e.g. by using catheters

Definitions

  • This invention relates to ultrasound monitoring apparatus and in particular, though not necessarily solely, to a Doppler ultrasound instrument used to measure and indicate cardiac function.
  • a variety of instruments used in the medical field employ Doppler ultrasound as the basis for measuring velocity or flow through blood vessels.
  • ultrasound transmit and receive crystals are aligned so as to insonate the vessel of interest; and the received signals, being signals reflected from moving red blood cells, are first analysed to determine blood velocity, and then combined with a computation of vessel cross- sectional area to give a measure of blood flow through the vessel.
  • the present applicant has, for some time, been manufacturing and selling an instrument for determining cardiac function.
  • This instrument incorporates a probe which is inserted into the patient's oesophagus, the probe having mounted on the outer end thereof, ultrasound transmit and receive crystals. In use, the probe is aligned so that the patients descending aorta is insonated with ultrasound.
  • the system processor which generates the transmit signal and analyses the receive signal is, of necessity, located outside the patient and, generally, some distance from the patient.
  • the processor is connected to the probe by means of a patient interconnect cable (PIC).
  • PIC patient interconnect cable
  • the invention provides an ultrasound monitoring apparatus including a probe engageable with a human subject ; a processor operable to process signals received by said probe; and an interconnect cable to connect said probe to said processor, said apparatus being characterised in that said interconnect cable includes signal amplification means operable to amplify signals received by said probe prior to receipt of said signals by said processor.
  • said interconnect cable includes a first connection at one end thereof engageable with a complimentary connection on said probe, said signal amplification means being located wit_hin, or adjacent to, said first connection.
  • Said signal amplification means is conveniently incorporated in a circuit board powered from said processor.
  • the invention provides a patient interconnect cable operable to interconnect a probe engageable with a human subject, with a processor operable to process signals received by said probe, said patient interconnect cable including first connection means constructed and arranged for engagement with said probe; second connection means constructed and arranged for engagement with said processor; and signal amplification means operable to amplify signals received by said patient interconnect cable from said probe.
  • said signal amplification means are located in, or adjacent to, said first connection means.
  • said patient interconnect cable further includes signal processing capability and/or analogue to digital signal conversion means.
  • the invention comprises a method of treating signals received by a probe engageable with a human subject, said probe forming part of an ultrasound monitoring apparatus which apparatus further includes a processor operable to process said signals, said method comprising amplifying said signals received by said probe before inputting said signals into said system processor.
  • the invention comprises a method of reducing the impedance of a receive signal in an ultrasound monitoring apparatus comprising a probe engageable with a human subject; a processor operable to process signals received by said probe; an-i an interconnect cable interconnecting said probe to said processor, said method comprising amplifying signals received by said probe before inputting said signals into said processor.
  • Preferably said method includes amp]_Lfying signals received by said probe within said interconnect cable.
  • Figure 1 shows a schematic system outline of a Doppler ultrasound cardiac output monitor incorporating the various aspects of the invention
  • Figure 2 shows a plan view of a patient interconn ect cable suitable for use in the monitor shown in Figure 1 ;
  • Figure 3 shows a schematic layout for certain electrical components incorporated in the cable shown in Figure 2.
  • the present invention relates to ultrasound monitoring apparatus 5, in this case a Doppler ultrasound cardiac function monitor.
  • the monitor 5 includes a probe 7 engageable with a human subject to insonate an organ or vessel with ultrasound and to receive ultrasound signals reflected from red blood cells passing through the organ or vessel.
  • the probe 7 comprises a disposable elongate flexible catheter-like device having ultrasound transmit and receive crystals mounted at one end thereof, and having a connector provided at the other end.
  • the probe as depicted and described herein, is inserted into the oesophagus of a sedated patient so that the ultrasound transmit and receive crystals are located adjacent to, and aligned at 45° to, the descending aorta.
  • the monitor 5 further includes a system processor 9 which is constructed and arranged to cause the probe 7 to emit ultrasound, and which receives electronic signals derived from the reflected ultrasound and processes these signals to obtain measures of blood velocity.
  • the probe 7 is connected to the system processor 9 through a patient interconnect cable (PIC) 11.
  • PIC patient interconnect cable
  • the present invention provides a solution to this problem by including a signal amplifier 13 in the PIC 11.
  • the amplifier 13 is preferably located on or within the cable as close to the connection with the probe 7 as is practically possible.
  • the PIC 11 is shown comprising a flexible centre cord section 15 having a connector 17 at one end thereof to enable connection into the system processor 9, and a further connector 19 at the other end thereof to enable connection to the disposable probe 7.
  • the centre cord section 15 can be of any form suitable for the intended application but may, for example, comprise a multi core, score screened cable.
  • the connector 17 may, for example, comprise a FISCHER 10-way plug.
  • the connector 19 typically comprises two halves formed from an insulating material which, when combined, envelop and house a printed circuit board 21.
  • Edge connector 23 fixed to the PCB 21 projects through a locating and sealing wa ⁇ section 25 of the connector to define a connection point with a complimentary shaped connector (not shown] forming part of the probe 7.
  • the PCB 21 is powered from the system processor 9 through the centre cable section 15 and, in accordance with the invention, includes a signal amplifier thereon as will be described in greater detail below.
  • the PIC 11 and more particularly the PCB 21 , is provided with a number of electronic components to enable not only the performance of the invention claimed herein, but also to enable the full functions of a particular form of disposable ultrasound probe to be realised.
  • the PCB has mounted thereon, connector socket 23, transformer 27, tuned amplifier circuit 28, and power and decoupling circuit 29.
  • the PCB 21 may further include line filter components 30 to remove noise induced in the
  • connector socket 23 has a number of terminals corresponding to various functional features of the probe 7.
  • T x and R x carry ultrasound signals to and from the transmit and receive crystals, respectively, of the probe 7.
  • terminals SDA and SCL form part of an industry standard I 2 C communications bus which allows data to be communicated between the probe 7 and the host system processor 9, via the PIC 11.
  • Transformer 27 is a simple unitary component providing isolation of the transmit crystal (not shown] incorporated in the probe 7.
  • transformer T2 included in the tuned amplifier circuit 28 provides isolation to the receive crystal (not shown) also included in the probe 7.
  • T2 also acts, in combination with capacitor Cl , to provide high input impedence at the Doppler ultrasound frequency selected for the system - in this case 4Mhz.
  • the tuned circuit not only ensures high impedence in a very narrow spectral band about 4Mhz, but also ensures impedence approaches zero either side of the band.
  • the high input impedence ensures less loading of the crystal.
  • the 'tuning' of the circuit about the Doppler frequency ensures sensitivity of the device to just the frequency of interest and therefore makes the system less susceptible to extraneous 'noise'.
  • the tuned circuit 28 includes amplifier U1A which is onfigured to have a gain of 2 and to provide a low impedence drive for the PIC 11.
  • Power input and decoupling circuit 29 provides power and decoupling for the tuned circuit 28 via the system processor 9.
  • the configuration herein described causes the weak reflected signals received by the probe 7 to be amplified very near source.
  • the strong amplified signals from a low impedance source results in a system which is much less susceptible to noise pick-up with the result that system signal to noise ratio is greatly improved.
  • a further advantage of the system described herein is that it readily provides for additional capability, such as processing power, to be included in the PIC. This, in turn, would enable additional intelligence to be built into the disposable probe 7 such that signals from the probe could be conditioned and digitised before be passed back to the host processor 9 through the in-built communication bus.

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Biomedical Technology (AREA)
  • Biophysics (AREA)
  • Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
  • Pathology (AREA)
  • Radiology & Medical Imaging (AREA)
  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Medical Informatics (AREA)
  • Molecular Biology (AREA)
  • Surgery (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Ultra Sonic Daignosis Equipment (AREA)

Abstract

L'invention concerne un câble de liaison (11) s'utilisant avec une sonde à ultrasons (7) et un processeur hôte (9), ces composants étant réunis pour former un appareil de contrôle hémodynamique. Le câble de liaison (11) est caractérisé par la présence d'un un amplificateur (13) intégré, et de préférence adjacent à la liaison (19) avec la sonde (7), destiné à amplifier les signaux reçus depuis la sonde et par conséquent à rendre l'appareil de contrôle moins sensible aux bruits parasites.
PCT/GB2000/001414 1999-04-13 2000-04-13 Cable de liaison pour appareil de surveillance a ultrasons WO2000061007A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU44172/00A AU4417200A (en) 1999-04-13 2000-04-13 Interconnect cable for an ultrasound monitoring apparatus

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GBGB9908426.1A GB9908426D0 (en) 1999-04-13 1999-04-13 Improvements in or relating to ultrasound monitoring apparatus
GB9908426.1 1999-04-13

Publications (1)

Publication Number Publication Date
WO2000061007A1 true WO2000061007A1 (fr) 2000-10-19

Family

ID=10851446

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB2000/001414 WO2000061007A1 (fr) 1999-04-13 2000-04-13 Cable de liaison pour appareil de surveillance a ultrasons

Country Status (3)

Country Link
AU (1) AU4417200A (fr)
GB (1) GB9908426D0 (fr)
WO (1) WO2000061007A1 (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007026300A1 (fr) * 2005-08-30 2007-03-08 Koninklijke Philips Electronics, N.V. Transducteur de therapie et d'imagerie mixte equipe d'un amplificateur de transducteur de therapie
WO2007026298A3 (fr) * 2005-08-30 2007-06-07 Koninkl Philips Electronics Nv Transducteur de therapie et d'imagerie mixte
US8012092B2 (en) 2005-08-30 2011-09-06 Koninklijke Philips Electronics N.V. Method of using a combination imaging and therapy transducer to dissolve blood clots
WO2013032986A3 (fr) * 2011-08-31 2013-07-18 Ysi Incorporated Tête de sonde remplaçable ayant un amplificateur opérationnel
US8664938B2 (en) 2010-05-05 2014-03-04 Ysi Incorporated Replaceable probe head
WO2018158064A1 (fr) * 2017-02-28 2018-09-07 Koninklijke Philips N.V. Imagerie ultrasonore intravasculaire

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3309095A1 (de) * 1982-03-15 1983-09-22 Olympus Optical Co., Ltd., Tokyo Vorrichtung zur untersuchung des inneren von koerperhoehlen mit ultraschallwellen
US4819652A (en) * 1985-02-08 1989-04-11 University Patents, Inc. C W and pulse Doppler diagnostic system
US4917097A (en) * 1987-10-27 1990-04-17 Endosonics Corporation Apparatus and method for imaging small cavities
US5307815A (en) * 1992-12-04 1994-05-03 Hewlett-Packard Company Ultrasonic transducer with integrated variable gain amplifier

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3309095A1 (de) * 1982-03-15 1983-09-22 Olympus Optical Co., Ltd., Tokyo Vorrichtung zur untersuchung des inneren von koerperhoehlen mit ultraschallwellen
US4819652A (en) * 1985-02-08 1989-04-11 University Patents, Inc. C W and pulse Doppler diagnostic system
US4917097A (en) * 1987-10-27 1990-04-17 Endosonics Corporation Apparatus and method for imaging small cavities
US5307815A (en) * 1992-12-04 1994-05-03 Hewlett-Packard Company Ultrasonic transducer with integrated variable gain amplifier

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007026298A3 (fr) * 2005-08-30 2007-06-07 Koninkl Philips Electronics Nv Transducteur de therapie et d'imagerie mixte
US8012092B2 (en) 2005-08-30 2011-09-06 Koninklijke Philips Electronics N.V. Method of using a combination imaging and therapy transducer to dissolve blood clots
WO2007026300A1 (fr) * 2005-08-30 2007-03-08 Koninklijke Philips Electronics, N.V. Transducteur de therapie et d'imagerie mixte equipe d'un amplificateur de transducteur de therapie
US9198680B2 (en) 2005-08-30 2015-12-01 Koninklijke Philips N.V. Combination imaging and therapy transducer with therapy transducer amplifier
US9200929B2 (en) 2010-05-05 2015-12-01 Ysi Incorporated Replaceable probe head
US8664938B2 (en) 2010-05-05 2014-03-04 Ysi Incorporated Replaceable probe head
US9170132B2 (en) 2010-05-05 2015-10-27 Ysi Incorporated Replaceable probe head having an operational amplifier
WO2013032986A3 (fr) * 2011-08-31 2013-07-18 Ysi Incorporated Tête de sonde remplaçable ayant un amplificateur opérationnel
WO2018158064A1 (fr) * 2017-02-28 2018-09-07 Koninklijke Philips N.V. Imagerie ultrasonore intravasculaire
CN110573087A (zh) * 2017-02-28 2019-12-13 皇家飞利浦有限公司 血管内超声成像
US20210128109A1 (en) * 2017-02-28 2021-05-06 Koninklijke Philips N.V. Intravascular ultrasound imaging
CN110573087B (zh) * 2017-02-28 2022-07-08 皇家飞利浦有限公司 血管内超声成像
US11684342B2 (en) 2017-02-28 2023-06-27 Philips Image Guided Therapy Corporation Intravascular ultrasound imaging
EP3375378A1 (fr) * 2017-03-17 2018-09-19 Koninklijke Philips N.V. Imagerie intravasculaire par ultrasons

Also Published As

Publication number Publication date
AU4417200A (en) 2000-11-14
GB9908426D0 (en) 1999-06-09

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