CA2268892A1 - Cardioversion/defibrillation lead impedance measurement system - Google Patents

Cardioversion/defibrillation lead impedance measurement system

Info

Publication number
CA2268892A1
CA2268892A1 CA002268892A CA2268892A CA2268892A1 CA 2268892 A1 CA2268892 A1 CA 2268892A1 CA 002268892 A CA002268892 A CA 002268892A CA 2268892 A CA2268892 A CA 2268892A CA 2268892 A1 CA2268892 A1 CA 2268892A1
Authority
CA
Canada
Prior art keywords
lead
defibrillation
leads
measure
measured
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.)
Granted
Application number
CA002268892A
Other languages
French (fr)
Other versions
CA2268892C (en
Inventor
Robert J. Schuelke
Barbara J. Schmid
Jonathan R. Gering
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.)
Medtronic Inc
Original Assignee
Medtronic, Inc.
Robert J. Schuelke
Barbara J. Schmid
Jonathan R. Gering
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., Robert J. Schuelke, Barbara J. Schmid, Jonathan R. Gering filed Critical Medtronic, Inc.
Publication of CA2268892A1 publication Critical patent/CA2268892A1/en
Application granted granted Critical
Publication of CA2268892C publication Critical patent/CA2268892C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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
    • A61N1/38—Applying electric currents by contact electrodes alternating or intermittent currents for producing shock effects
    • A61N1/39—Heart defibrillators
    • A61N1/3925—Monitoring; Protecting
    • A61N1/3937—Monitoring output parameters
    • 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
    • A61N1/37—Monitoring; Protecting
    • A61N1/3706—Pacemaker parameters

Abstract

A lead integrity measurement system for a cardiac pacemaker/cardioverter/defibrillator (PCD) of the type comprising an implantable pulse generator (IPG) and a lead system including one or more pacing leads each having a proximal end coupled to a pacing terminal of the IPG and a distal end with at least one pace/sense electrode in contact with a patient's heart and a pair of defibrillation leads coupled to defibrillation terminals of the IPG and defibrillation electrodes implanted in relation to the patient's heart. In a lead impedance test mode, the terminal of a selected defibrillation lead under test is coupled to system ground, and an excitation voltage is applied in an excitation path from a force lead terminal selected from the pacing leads. A measure lead is selected from among the other of the pacing leads and defibrillation leads, and the voltage induced in the lead under test is measured through the measure lead and the electrode/tissue interface of the measure lead and the defibrillation lead under test. The applied current in the excitation path is also measured, and an impedance value is derived from the measured current and voltage values. The test is continued with other selections of excitation and measure paths.
Comparisons of the measured impedances with maximum and minimum impedance values are used to determine lead integrity failures.
The lead impedance between two defibrillation leads is determined as a function of the sum of the derived defibrillation lead impedances.
CA002268892A 1996-11-05 1997-10-08 Cardioversion/defibrillation lead impedance measurement system Expired - Fee Related CA2268892C (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US08/741,757 1996-11-05
US08/741,757 US5755742A (en) 1996-11-05 1996-11-05 Cardioversion/defibrillation lead impedance measurement system
PCT/US1997/018515 WO1998019738A1 (en) 1996-11-05 1997-10-08 Cardioversion/defibrillation lead impedance measurement system

Publications (2)

Publication Number Publication Date
CA2268892A1 true CA2268892A1 (en) 1998-05-14
CA2268892C CA2268892C (en) 2005-12-06

Family

ID=24982048

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002268892A Expired - Fee Related CA2268892C (en) 1996-11-05 1997-10-08 Cardioversion/defibrillation lead impedance measurement system

Country Status (8)

Country Link
US (1) US5755742A (en)
EP (1) EP0944413B1 (en)
JP (1) JP2001505093A (en)
AU (1) AU4755997A (en)
CA (1) CA2268892C (en)
DE (1) DE69704170T2 (en)
ES (1) ES2156368T3 (en)
WO (1) WO1998019738A1 (en)

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US5755742A (en) 1998-05-26
WO1998019738A1 (en) 1998-05-14
JP2001505093A (en) 2001-04-17
CA2268892C (en) 2005-12-06
ES2156368T3 (en) 2001-06-16
DE69704170D1 (en) 2001-04-05
AU4755997A (en) 1998-05-29
EP0944413A1 (en) 1999-09-29
DE69704170T2 (en) 2001-06-21

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