WO2007102893A3 - Tank filters placed in series with the lead wires or circuits of active medical devices to enhance mri compatibility - Google Patents

Tank filters placed in series with the lead wires or circuits of active medical devices to enhance mri compatibility

Info

Publication number
WO2007102893A3
WO2007102893A3 PCT/US2006/060746 US2006060746W WO2007102893A3 WO 2007102893 A3 WO2007102893 A3 WO 2007102893A3 US 2006060746 W US2006060746 W US 2006060746W WO 2007102893 A3 WO2007102893 A3 WO 2007102893A3
Authority
WO
Grant status
Application
Patent type
Prior art keywords
tank
filter
lead
medical
inductor
Prior art date
Application number
PCT/US2006/060746
Other languages
French (fr)
Other versions
WO2007102893A2 (en )
Inventor
Christine A Frysz
Robert A Stevenson
Warren S Dabney
Original Assignee
Greatbatch Ltd
Christine A Frysz
Robert A Stevenson
Warren S Dabney
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

Links

Classifications

    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61NELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY
    • A61N1/00Electrotherapy; Circuits therefor
    • A61N1/18Applying electric currents by contact electrodes
    • A61N1/32Applying electric currents by contact electrodes alternating or intermittent currents
    • A61N1/36Applying electric currents by contact electrodes alternating or intermittent currents for stimulation
    • A61N1/372Arrangements in connection with the implantation of stimulators
    • A61N1/375Constructional arrangements, e.g. casings
    • A61N1/3752Details of casing-lead connections
    • A61N1/3754Feedthroughs
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61NELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY
    • A61N1/00Electrotherapy; Circuits therefor
    • A61N1/02Details
    • A61N1/04Electrodes
    • A61N1/05Electrodes for implantation or insertion into the body, e.g. heart electrode
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61NELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY
    • A61N1/00Electrotherapy; Circuits therefor
    • A61N1/02Details
    • A61N1/08Arrangements or circuits for monitoring, protecting, controlling or indicating
    • A61N1/086Magnetic resonance imaging [MRI] compatible leads
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61NELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY
    • A61N1/00Electrotherapy; Circuits therefor
    • A61N1/18Applying electric currents by contact electrodes
    • A61N1/32Applying electric currents by contact electrodes alternating or intermittent currents
    • A61N1/36Applying electric currents by contact electrodes alternating or intermittent currents for stimulation
    • A61N1/362Heart stimulators
    • A61N1/37Monitoring; Protecting
    • A61N1/3718Monitoring of or protection against external electromagnetic fields or currents
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01GCAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES OR LIGHT-SENSITIVE DEVICES, OF THE ELECTROLYTIC TYPE
    • H01G4/00Fixed capacitors; Processes of their manufacture
    • H01G4/35Feed-through capacitors or anti-noise capacitors
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01GCAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES OR LIGHT-SENSITIVE DEVICES, OF THE ELECTROLYTIC TYPE
    • H01G4/00Fixed capacitors; Processes of their manufacture
    • H01G4/40Structural combinations of fixed capacitors with other electric elements, the structure mainly consisting of a capacitor, e.g. RC combinations
    • HELECTRICITY
    • H03BASIC ELECTRONIC CIRCUITRY
    • H03HIMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H1/00Constructional details of impedance networks whose electrical mode of operation is not specified or applicable to more than one type of network
    • H03H1/0007Constructional details of impedance networks whose electrical mode of operation is not specified or applicable to more than one type of network of radio frequency interference filters
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01FMAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F17/00Fixed inductances of the signal type
    • H01F17/04Fixed inductances of the signal type with magnetic core
    • H01F17/06Fixed inductances of the signal type with magnetic core with core substantially closed in itself, e.g. toroid
    • H01F2017/065Core mounted around conductor to absorb noise, e.g. EMI filter
    • HELECTRICITY
    • H03BASIC ELECTRONIC CIRCUITRY
    • H03HIMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H1/00Constructional details of impedance networks whose electrical mode of operation is not specified or applicable to more than one type of network
    • H03H2001/0021Constructional details
    • H03H2001/0042Wound, ring or feed-through type capacitor
    • HELECTRICITY
    • H03BASIC ELECTRONIC CIRCUITRY
    • H03HIMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H7/00Multiple-port networks comprising only passive electrical elements as network components
    • H03H7/01Frequency selective two-port networks
    • H03H7/17Structural details of sub-circuits of frequency selective networks
    • H03H7/1741Comprising typical LC combinations, irrespective of presence and location of additional resistors
    • H03H7/1766Parallel LC in series path
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00Metal working
    • Y10T29/49Method of mechanical manufacture
    • Y10T29/49002Electrical device making
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00Metal working
    • Y10T29/49Method of mechanical manufacture
    • Y10T29/49002Electrical device making
    • Y10T29/49004Electrical device making including measuring or testing of device or component part

Abstract

A TANK filter is provided for a lead wire of an active medical device (AMD). The TANK filter includes a capacitor in parallel with an inductor. The parallel capacitor and inductor are placed in series with the lead wire of the AMD, wherein values of capacitance and inductance are selected such that the TANK filter is resonant at a selected frequency. The Q of the inductor may be relatively maximized and the Q of the capacitor may be relatively minimized to reduce the overall Q of the TANK filter to attenuate current flow through the lead wire along a range of selected frequencies. In a preferred form, the TANK filter is integrated into a TIP and/or RING electrode for an active implantable medical device.
PCT/US2006/060746 2001-04-13 2006-11-09 Tank filters placed in series with the lead wires or circuits of active medical devices to enhance mri compatibility WO2007102893A3 (en)

Priority Applications (8)

Application Number Priority Date Filing Date Title
US59712505 true 2005-11-11 2005-11-11
US60/597,125 2005-11-11
US80367206 true 2006-06-01 2006-06-01
US60/803,672 2006-06-01
US11/423,073 2006-06-08
US11423073 US8244370B2 (en) 2001-04-13 2006-06-08 Band stop filter employing a capacitor and an inductor tank circuit to enhance MRI compatibility of active medical devices
US11/558,349 2006-11-09
US11558349 US7945322B2 (en) 2005-11-11 2006-11-09 Tank filters placed in series with the lead wires or circuits of active medical devices to enhance MRI compatibility

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2008539170A JP2009514617A (en) 2005-11-11 2006-11-09 Tank filter placed in the lead wires or circuits in series with the active medical device to enhance the Mri compatibility
EP20060850132 EP1945297B1 (en) 2005-11-11 2006-11-09 Tank filters placed in series with the lead wires or circuits of active medical devices to enhance mri compatibility

Publications (2)

Publication Number Publication Date
WO2007102893A2 true WO2007102893A2 (en) 2007-09-13
WO2007102893A3 true true WO2007102893A3 (en) 2008-05-02

Family

ID=38475309

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2006/060746 WO2007102893A3 (en) 2001-04-13 2006-11-09 Tank filters placed in series with the lead wires or circuits of active medical devices to enhance mri compatibility

Country Status (4)

Country Link
US (3) US7945322B2 (en)
EP (1) EP1945297B1 (en)
JP (1) JP2009514617A (en)
WO (1) WO2007102893A3 (en)

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EP1945297B1 (en) 2016-08-10 grant
US8463375B2 (en) 2013-06-11 grant
EP1945297A4 (en) 2009-05-27 application
WO2007102893A2 (en) 2007-09-13 application
US7945322B2 (en) 2011-05-17 grant
US20110066212A1 (en) 2011-03-17 application
US8200328B2 (en) 2012-06-12 grant
US20070112398A1 (en) 2007-05-17 application
US20110201912A1 (en) 2011-08-18 application
JP2009514617A (en) 2009-04-09 application

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