CA2390016A1 - Implantable cardiac rhythm management device for assessing status of chf patients - Google Patents

Implantable cardiac rhythm management device for assessing status of chf patients Download PDF

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Publication number
CA2390016A1
CA2390016A1 CA002390016A CA2390016A CA2390016A1 CA 2390016 A1 CA2390016 A1 CA 2390016A1 CA 002390016 A CA002390016 A CA 002390016A CA 2390016 A CA2390016 A CA 2390016A CA 2390016 A1 CA2390016 A1 CA 2390016A1
Authority
CA
Canada
Prior art keywords
rate
minute ventilation
tidal volume
management device
oxygen uptake
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
CA002390016A
Other languages
French (fr)
Other versions
CA2390016C (en
Inventor
Donald L. Hopper
Jeffrey E. Stahmann
Bruce R. Jones
James P. Nelson
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.)
Cardiac Pacemakers Inc
Original Assignee
Donald L. Hopper
Jeffrey E. Stahmann
Bruce R. Jones
James P. Nelson
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
Priority claimed from US09/434,009 external-priority patent/US6275727B1/en
Application filed by Donald L. Hopper, Jeffrey E. Stahmann, Bruce R. Jones, James P. Nelson, Cardiac Pacemakers, Inc. filed Critical Donald L. Hopper
Publication of CA2390016A1 publication Critical patent/CA2390016A1/en
Application granted granted Critical
Publication of CA2390016C publication Critical patent/CA2390016C/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
    • A61N1/36—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
    • A61N1/36585—Heart stimulators controlled by a physiological parameter, e.g. heart potential controlled by two or more physical 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
    • A61N1/3627—Heart stimulators for treating a mechanical deficiency of the heart, e.g. congestive heart failure or cardiomyopathy

Abstract

A method and apparatus for providing congestive heart failure therapy status.
An electronic device, preferably a cardiac rhythm management device, capable of measuring transthoracic impedance and for sensing a level of physical activity is implanted in a patient. The transthoracic impedance signal is processed to obtain an estimate of the subject's minute ventilation, respiratory rate, tidal volume, inspiratory rate and expiratory rate. From accelerometer measured activity, an estimate is obtained of oxygen uptake, carbon dioxide production and work rate. Ratios of tidal volume to respiratory rate, tidal volume to inspiratory time, tidal volume to expiratory time, heart rate to minute ventilation, respiratory rate to minute ventilation, tidal volume to minute ventilation, minute ventilation to oxygen uptake, minute ventilation to carbon dioxide production, minute ventilation to work rate, heart rate to work rate, oxygen uptake to heart rate and other ratios are meaningful status indicators for assessing the efficacy of particular therapy regimens to CHF patients.
CA002390016A 1999-11-04 2000-07-13 Implantable cardiac rhythm management device for assessing status of chf patients Expired - Fee Related CA2390016C (en)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
US09/434,009 1999-11-04
US09/434,009 US6275727B1 (en) 1999-11-04 1999-11-04 Implantable cardiac rhythm management device for assessing status of CHF patients
US09/547,519 US6459929B1 (en) 1999-11-04 2000-04-12 Implantable cardiac rhythm management device for assessing status of CHF patients
US09/547,519 2000-04-12
PCT/US2000/019230 WO2001032260A1 (en) 1999-11-04 2000-07-13 Implantable cardiac rhythm management device for assessing status of chf patients

Publications (2)

Publication Number Publication Date
CA2390016A1 true CA2390016A1 (en) 2001-05-10
CA2390016C CA2390016C (en) 2006-05-09

Family

ID=27030048

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002390016A Expired - Fee Related CA2390016C (en) 1999-11-04 2000-07-13 Implantable cardiac rhythm management device for assessing status of chf patients

Country Status (7)

Country Link
US (1) US6459929B1 (en)
EP (1) EP1225954B1 (en)
AT (1) ATE372808T1 (en)
AU (1) AU5934300A (en)
CA (1) CA2390016C (en)
DE (1) DE60036396T2 (en)
WO (1) WO2001032260A1 (en)

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