WO2001043149A3 - Reforming wet-tantalum capacitors in implantable medical devices - Google Patents

Reforming wet-tantalum capacitors in implantable medical devices Download PDF

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Publication number
WO2001043149A3
WO2001043149A3 PCT/US2000/042383 US0042383W WO0143149A3 WO 2001043149 A3 WO2001043149 A3 WO 2001043149A3 US 0042383 W US0042383 W US 0042383W WO 0143149 A3 WO0143149 A3 WO 0143149A3
Authority
WO
WIPO (PCT)
Prior art keywords
wet
reform
tantalum capacitors
capacitors
voltage
Prior art date
Application number
PCT/US2000/042383
Other languages
French (fr)
Other versions
WO2001043149A2 (en
Inventor
Robert S Harguth
Ron Balczewski
William J Linder
Gregory Scott Munson
Michael Wesley Paris
Original Assignee
Cardiac Pacemakers 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 Cardiac Pacemakers Inc filed Critical Cardiac Pacemakers Inc
Priority to AU45094/01A priority Critical patent/AU4509401A/en
Publication of WO2001043149A2 publication Critical patent/WO2001043149A2/en
Publication of WO2001043149A3 publication Critical patent/WO2001043149A3/en

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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
    • A61N1/38Applying electric currents by contact electrodes alternating or intermittent currents for producing shock effects
    • A61N1/39Heart defibrillators
    • A61N1/3956Implantable devices for applying electric shocks to the heart, e.g. for cardioversion

Abstract

Miniature defibrillators and cardioverters detect abnormal heart rhythms and automatically apply electrical therapy to restore normal heart function. Critical components in these devices are aluminum electrolytic capacitors, which store and deliver one or more life-saving bursts of electric charge to a heart of a patient. This type of capacitor requires regular 'reform' to preserve its charging efficiency over time. Because reform expends valuable battery life, manufacturers developed wet-tantalum capacitors, which are generally understood not to require reform. Yet, the present inventors discovered through extensive study that wet-tantalum capacitors exhibit progressively worse charging efficiency over time. Accordingly, to address this problem, the inventors devised unique reform techniques for wet-tantalum capacitors. One exemplary technique entails charging wet-tantalum capacitors to a voltage equal to about 90 % of their rated voltage and maintaining this voltage for about five minutes before discharging them.
PCT/US2000/042383 1999-12-01 2000-11-29 Reforming wet-tantalum capacitors in implantable medical devices WO2001043149A2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU45094/01A AU4509401A (en) 1999-12-01 2000-11-29 Reforming wet-tantalum capacitors in implantable medical devices

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US09/453,358 US6283985B1 (en) 1999-12-01 1999-12-01 Reforming wet-tantalum capacitors in implantable defibrillators and other medical devices
US09/453,358 1999-12-01

Publications (2)

Publication Number Publication Date
WO2001043149A2 WO2001043149A2 (en) 2001-06-14
WO2001043149A3 true WO2001043149A3 (en) 2002-02-07

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2000/042383 WO2001043149A2 (en) 1999-12-01 2000-11-29 Reforming wet-tantalum capacitors in implantable medical devices

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US (3) US6283985B1 (en)
AU (1) AU4509401A (en)
WO (1) WO2001043149A2 (en)

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Also Published As

Publication number Publication date
US6283985B1 (en) 2001-09-04
US6761728B2 (en) 2004-07-13
AU4509401A (en) 2001-06-18
US20040098058A1 (en) 2004-05-20
US7171267B2 (en) 2007-01-30
US20010047190A1 (en) 2001-11-29
WO2001043149A2 (en) 2001-06-14

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