WO2003090860A3 - Ultrasound methods and implantable medical devices using same - Google Patents

Ultrasound methods and implantable medical devices using same Download PDF

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Publication number
WO2003090860A3
WO2003090860A3 PCT/US2003/012595 US0312595W WO03090860A3 WO 2003090860 A3 WO2003090860 A3 WO 2003090860A3 US 0312595 W US0312595 W US 0312595W WO 03090860 A3 WO03090860 A3 WO 03090860A3
Authority
WO
WIPO (PCT)
Prior art keywords
ultrasound
switched
medical devices
circuit
dmi
Prior art date
Application number
PCT/US2003/012595
Other languages
French (fr)
Other versions
WO2003090860A2 (en
Inventor
Branko Breyer
Bozidar Ferek-Petric
Original Assignee
Medtronic Inc
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 Medtronic Inc filed Critical Medtronic Inc
Priority to AU2003234193A priority Critical patent/AU2003234193A1/en
Priority to DE60331904T priority patent/DE60331904D1/de
Priority to EP03728501A priority patent/EP1501594B1/en
Publication of WO2003090860A2 publication Critical patent/WO2003090860A2/en
Publication of WO2003090860A3 publication Critical patent/WO2003090860A3/en

Links

Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61N—ELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY
    • A61N1/00—Electrotherapy; Circuits therefor
    • A61N1/18—Applying electric currents by contact electrodes
    • A61N1/32—Applying electric currents by contact electrodes alternating or intermittent currents
    • A61N1/36—Applying electric currents by contact electrodes alternating or intermittent currents for stimulation
    • A61N1/362—Heart stimulators
    • A61N1/365—Heart stimulators controlled by a physiological parameter, e.g. heart potential
    • A61N1/36514—Heart stimulators controlled by a physiological parameter, e.g. heart potential controlled by a physiological quantity other than heart potential, e.g. blood pressure
    • A61N1/36528—Heart stimulators controlled by a physiological parameter, e.g. heart potential controlled by a physiological quantity other than heart potential, e.g. blood pressure the parameter being measured by means of ultrasound
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61N—ELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY
    • A61N1/00—Electrotherapy; Circuits therefor
    • A61N1/18—Applying electric currents by contact electrodes
    • A61N1/32—Applying electric currents by contact electrodes alternating or intermittent currents
    • A61N1/36—Applying electric currents by contact electrodes alternating or intermittent currents for stimulation
    • A61N1/362—Heart stimulators
    • A61N1/365—Heart stimulators controlled by a physiological parameter, e.g. heart potential
    • A61N1/36514—Heart stimulators controlled by a physiological parameter, e.g. heart potential controlled by a physiological quantity other than heart potential, e.g. blood pressure
    • A61N1/36571—Heart stimulators controlled by a physiological parameter, e.g. heart potential controlled by a physiological quantity other than heart potential, e.g. blood pressure controlled by blood flow rate, e.g. blood velocity or cardiac output

Abstract

An ultrasound method and medical devices using same provide for various techniques of sampling blood flow velocity, e.g., at several sampling rates. To minimize the energy required for ultrasound monitoring, pulsed Doppler signal packages provided by a pulsed ultrasound circuit are switched in such a way that the repetition rate is the lowest possible and yet sufficiently high to be able to record the blood flow velocity within the heart. For example, an ultrasound circuit may be activated only within a part of the cardiac cycle designated as the Doppler Measurement Interval (DMI); the ultrasound circuit may be switched between an on state and an off state during the DMI; and/or the ultrasound circuit may also be switched on and off in different sampling modes: detection mode and measurement mode (e.g., using different sampling rates).
PCT/US2003/012595 2002-04-25 2003-04-24 Ultrasound methods and implantable medical devices using same WO2003090860A2 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
AU2003234193A AU2003234193A1 (en) 2002-04-25 2003-04-24 Ultrasound methods and implantable medical devices using same
DE60331904T DE60331904D1 (en) 2002-04-25 2003-04-24
EP03728501A EP1501594B1 (en) 2002-04-25 2003-04-24 Ultrasound methods and implantable medical devices using same

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US10/131,256 2002-04-25
US10/131,256 US7037266B2 (en) 2002-04-25 2002-04-25 Ultrasound methods and implantable medical devices using same

Publications (2)

Publication Number Publication Date
WO2003090860A2 WO2003090860A2 (en) 2003-11-06
WO2003090860A3 true WO2003090860A3 (en) 2005-09-15

Family

ID=29248562

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2003/012595 WO2003090860A2 (en) 2002-04-25 2003-04-24 Ultrasound methods and implantable medical devices using same

Country Status (5)

Country Link
US (1) US7037266B2 (en)
EP (1) EP1501594B1 (en)
AU (1) AU2003234193A1 (en)
DE (1) DE60331904D1 (en)
WO (1) WO2003090860A2 (en)

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DE102008016364A1 (en) * 2008-03-29 2009-10-01 Biotronik Crm Patent Ag Signal line of an implantable electromedical device
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Also Published As

Publication number Publication date
EP1501594B1 (en) 2010-03-31
DE60331904D1 (en) 2010-05-12
US20030204140A1 (en) 2003-10-30
AU2003234193A1 (en) 2003-11-10
US7037266B2 (en) 2006-05-02
EP1501594A1 (en) 2005-02-02
WO2003090860A2 (en) 2003-11-06

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