WO1997043003A1 - Dispositif medical implantable avec confirmation de l'activation du patient - Google Patents

Dispositif medical implantable avec confirmation de l'activation du patient Download PDF

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Publication number
WO1997043003A1
WO1997043003A1 PCT/US1997/007851 US9707851W WO9743003A1 WO 1997043003 A1 WO1997043003 A1 WO 1997043003A1 US 9707851 W US9707851 W US 9707851W WO 9743003 A1 WO9743003 A1 WO 9743003A1
Authority
WO
WIPO (PCT)
Prior art keywords
patient
circuit
control circuit
microprocessor
activation signal
Prior art date
Application number
PCT/US1997/007851
Other languages
English (en)
Inventor
David Prutchi
Patrick J. Paul
Original Assignee
Sulzer Intermedics 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 Sulzer Intermedics Inc. filed Critical Sulzer Intermedics Inc.
Publication of WO1997043003A1 publication Critical patent/WO1997043003A1/fr

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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
    • A61N1/372—Arrangements in connection with the implantation of stimulators
    • A61N1/37211—Means for communicating with stimulators
    • A61N1/37252—Details of algorithms or data aspects of communication system, e.g. handshaking, transmitting specific data or segmenting data
    • A61N1/37258—Alerting the patient

Definitions

  • microprocessor 34 initiates storage of this activity per block 172. As shown in FIG. 2, microprocessor 34 is connected along line 84 to waveform storage 86. Waveform storage 86 receives analog inputs along lines 92 and 94, and stores the diagnostic and therapeutic activity in RAM memory.
  • hemodynamic sensor 90 may be an impedance type sensor capable of sensing hemodynamic information about the patient. This information passes to waveform storage 86 along line 88 and is stored therein. After a predetermined activation period, measurable by a time period or information collected, for example, microprocessor 34 terminates diagnostic and/or therapeutic activities as shown in block 174. The flow diagram then reverts back along line 176 to the normal pacing program of block 152.
  • detection circuit 103 may have various embodiments.
  • Tap sensor 104 may be an accelerometer, microphone, or like device capable of receiving and transmitting signals to microprocessor 34. Examples of accelerometers and sensors are described in United States Patent Number 4,926,863 entitled “Rate Responsive Cardiac Pacemaker” issued on May 22, 1990 to Alt, and United States Patent Number 4,428,378 entitled “Rate Adaptive Pacer” issued on January 31 , 1984 to Anderson et al. Additionally, United States Patent 5,304,206 entitled “Activation Technique for Implantable Medical Device” issued on April 19, 1994 to Baker, Jr. et al fully teaches tap sensing circuits and is fully incorporated herein by reference.
  • FIG. 6 shows an alternate embodiment detection circuit 103 (FIG. 2).
  • an external magnet 230 is used to initiate a patient activation input signal to the microprocessor.
  • Magnet 230 is placed over skin 232 and adjacent to and in close proximity with control circuit 32 ( FIG. 2) of the cardiac stimulator.
  • Control circuit 32 includes the addition of a magnetic sensor 234 and a conditioning circuit 236 that is electrically connected to microprocessor 34 ( FIG. 2).
  • Magnetic sensor 234 may be any appropriate sensor capable of sensing a time varying magnetic field, and is preferably a GMR sensor. Other resistive type sensor geometries are equally applicable to the present invention so long as such resistive sensors are sensitive to a magnetic field.
  • FIG. 7 shows a possible embodiment for magnetic field sensor 234.
  • Sensor 234 includes a bridge circuit 238 having four bridge elements Rl, R2, R3, and R4.
  • Bridge circuit 238 provides an output signal to conditioning circuit 236 via lines 240 and 242.
  • Conditioning circuit 236 demodulates the output signal and provides filtering and signal shaping.
  • the output signal once conditioned in circuit 236, is then sent to microprocessor 34 (FIG. 2).
  • Conditioning circuit 236 also may define a minimum threshold level from magnetic sensor 234 in order to eliminate erroneous effects of magnetic noise.
  • Bridge elements R1-R4 of bridge circuit 238 are preferably integrated circuit field effect transistors that have been biased to operate in the resistive region.

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  • Health & Medical Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Biomedical Technology (AREA)
  • Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
  • Radiology & Medical Imaging (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Electrotherapy Devices (AREA)

Abstract

Le dispositif médical implantable (10) assure une communication bidirectionnelle avec un patient. Le dispositif médical comprend un circuit de détection (104,108, 112) qui reçoit un signal d'activation déclenché manuellement et extérieurement par le patient. Ce signal d'activation permet d'activer le dispositif implanté afin que ce dernier commence son action diagnostique et/ou thérapeutique. Un circuit de signalisation (100) notifie immédiatement le patient qu'une telle action a commencé. Des données sont mémorisées lors de la période d'activation puis téléchargées sur un programmeur externe afin d'être évaluées par un médecin.
PCT/US1997/007851 1996-05-10 1997-05-08 Dispositif medical implantable avec confirmation de l'activation du patient WO1997043003A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US64445596A 1996-05-10 1996-05-10
US08/644,455 1996-05-10

Publications (1)

Publication Number Publication Date
WO1997043003A1 true WO1997043003A1 (fr) 1997-11-20

Family

ID=24584981

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US1997/007851 WO1997043003A1 (fr) 1996-05-10 1997-05-08 Dispositif medical implantable avec confirmation de l'activation du patient

Country Status (1)

Country Link
WO (1) WO1997043003A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999052593A1 (fr) 1998-04-15 1999-10-21 Cardiac Pacemakers, Inc. Systeme de defibrillation auriculaire a mode de detection de fibrillation pouvant etre selectionne par le patient
WO2001028627A1 (fr) * 1999-10-20 2001-04-26 Cardiac Pacemakers, Inc. Dispositif medical implantable possedant une capacite d'enregistrement et de reponse vocale
US7606618B1 (en) 2006-04-07 2009-10-20 Pacesetter, Inc. Implantable medical device with notification system
US10639488B2 (en) 2015-02-23 2020-05-05 Cardiac Pacemakers, Inc. Tap sensor-enabled IMD

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4140131A (en) * 1976-11-03 1979-02-20 Medtronic, Inc. Body tissue stimulation apparatus with warning device
US4545380A (en) * 1984-04-16 1985-10-08 Cordis Corporation Method and apparatus for setting and changing parameters or functions of an implanted device
US5076272A (en) * 1990-06-15 1991-12-31 Telectronics Pacing Systems, Inc. Autocontrollable pacemaker with alarm
US5304206A (en) * 1991-11-18 1994-04-19 Cyberonics, Inc. Activation techniques for implantable medical device
DE19509609A1 (de) * 1994-04-25 1995-10-26 Siemens Elema Ab Medizinisches Gerät

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4140131A (en) * 1976-11-03 1979-02-20 Medtronic, Inc. Body tissue stimulation apparatus with warning device
US4545380A (en) * 1984-04-16 1985-10-08 Cordis Corporation Method and apparatus for setting and changing parameters or functions of an implanted device
US5076272A (en) * 1990-06-15 1991-12-31 Telectronics Pacing Systems, Inc. Autocontrollable pacemaker with alarm
US5304206A (en) * 1991-11-18 1994-04-19 Cyberonics, Inc. Activation techniques for implantable medical device
DE19509609A1 (de) * 1994-04-25 1995-10-26 Siemens Elema Ab Medizinisches Gerät

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999052593A1 (fr) 1998-04-15 1999-10-21 Cardiac Pacemakers, Inc. Systeme de defibrillation auriculaire a mode de detection de fibrillation pouvant etre selectionne par le patient
EP0996484A1 (fr) * 1998-04-15 2000-05-03 Cardiac Pacemakers, Inc. Systeme de defibrillation auriculaire a mode de detection de fibrillation pouvant etre selectionne par le patient
EP0996484A4 (fr) * 1998-04-15 2008-10-15 Cardiac Pacemakers Inc Systeme de defibrillation auriculaire a mode de detection de fibrillation pouvant etre selectionne par le patient
WO2001028627A1 (fr) * 1999-10-20 2001-04-26 Cardiac Pacemakers, Inc. Dispositif medical implantable possedant une capacite d'enregistrement et de reponse vocale
US6865424B2 (en) 1999-10-20 2005-03-08 Cardiac Pacemakers, Inc. Implantable medical device with voice responding and recording capacity
US7551962B2 (en) 1999-10-20 2009-06-23 Cardiac Pacemakers, Inc. Implantable medical device with voice responding and recording capacity
US7606618B1 (en) 2006-04-07 2009-10-20 Pacesetter, Inc. Implantable medical device with notification system
US10639488B2 (en) 2015-02-23 2020-05-05 Cardiac Pacemakers, Inc. Tap sensor-enabled IMD

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