GB1495949A - Demand heart pacer - Google Patents

Demand heart pacer

Info

Publication number
GB1495949A
GB1495949A GB55879/74A GB5587974A GB1495949A GB 1495949 A GB1495949 A GB 1495949A GB 55879/74 A GB55879/74 A GB 55879/74A GB 5587974 A GB5587974 A GB 5587974A GB 1495949 A GB1495949 A GB 1495949A
Authority
GB
United Kingdom
Prior art keywords
section
heart
oscillator
pulses
output
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.)
Expired
Application number
GB55879/74A
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.)
ARCO MED PROD CO
Original Assignee
ARCO MED PROD CO
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 ARCO MED PROD CO filed Critical ARCO MED PROD CO
Publication of GB1495949A publication Critical patent/GB1495949A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K3/00—Circuits for generating electric pulses; Monostable, bistable or multistable circuits
    • H03K3/02—Generators characterised by the type of circuit or by the means used for producing pulses
    • H03K3/353—Generators characterised by the type of circuit or by the means used for producing pulses by the use, as active elements, of field-effect transistors with internal or external positive feedback
    • H03K3/355—Monostable circuits
    • 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
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K3/00—Circuits for generating electric pulses; Monostable, bistable or multistable circuits
    • H03K3/02—Generators characterised by the type of circuit or by the means used for producing pulses
    • H03K3/353—Generators characterised by the type of circuit or by the means used for producing pulses by the use, as active elements, of field-effect transistors with internal or external positive feedback
    • H03K3/354—Astable circuits

Landscapes

  • Health & Medical Sciences (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Cardiology (AREA)
  • Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
  • Physiology (AREA)
  • Engineering & Computer Science (AREA)
  • Biomedical Technology (AREA)
  • Biophysics (AREA)
  • Radiology & Medical Imaging (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Electrotherapy Devices (AREA)
  • Oscillators With Electromechanical Resonators (AREA)

Abstract

1495949 Heart pacers ARCO MEDICAL PRODUCTS CO 24 Dec 1974 [4 Jan 1974] 55879/74 Heading A5R A heart pacer for producing heart stimulating pulses in the absence of naturally occuring heart pulses, is provided with a facility whereby an indication of the voltage of a power source is indicated by a comparison of a constant heart-beat rate produced by a stimulating means, when an inhibiting means is decoupled, and a voltage-dependent heartbeat rate, produced when the inhibiting means is connected. As shown Fig. 1 an oscillator 15 provides heart stimulation pulses to a lead 10 through a voltage multiplier 17. Heart or stimulation pulses are fed on a line 18 through an amplifier 20, to a clamp 21, rejecting spurious signals occurring during a refractory period. Valid pulses trigger a one-shot multivibrator the output of which inhibits the oscillator 15 through an inhibitor 25 and rests the clamp 21. In detail Fig. 3 the oscillator section 15 produces pulses on the charging and discharging of a timing capacitor 100 by MOS devices 102, 104, 115, 116; the pulse width being determined by MOS devices 135, 136. The charged voltage of the capacitor 100 is determined by a regulator comprising FET device 125. The output pulses from the oscillator section are applied to the multiplier section 17 wherein transistors 150, 155 build up charges on capacitors 152, 163 which are combined and presented at the output terminal 36. The preceding circuitry comprises a voltage stabilised "fixed rate" heartpacer circuit. A "demand" capability is provided by connecting heart and stimulation pulses through a lead 173 to the amplifier section 20, the output of which is applied to the one-shot multivibrator section 24. The output of the multivibrator section is fed back to an FET 240 forming the refractory clamp section 21 which blocks any signal from the amplifier section 20 for the duration of the negative output from the multivibrator section 24. The output from section 24 is also fed to the oscillator inhibitor section 25 wherein an FET device 228 drives a point A in the oscillator section 15 to a positive potential causing the discharge of the capacitor 100. With reduction in the voltage of a supply battery, not shown, the time of conduction of FET device 228 will decrease so that the frequency of the oscillator section 15 in the demand mode will increase. The state of the battery is checked by the closure of a reed switch 223 by an externally applied magnet whereby the oscillator section is placed in the "fixed rate" mode and the frequency compared with the heart-rate in the "demand" mode (when the heart is not continuously self-pulsing).
GB55879/74A 1974-01-04 1974-12-24 Demand heart pacer Expired GB1495949A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US430827A US3926197A (en) 1974-01-04 1974-01-04 Demand heart pacer

Publications (1)

Publication Number Publication Date
GB1495949A true GB1495949A (en) 1977-12-21

Family

ID=23709221

Family Applications (2)

Application Number Title Priority Date Filing Date
GB3619/77A Expired GB1495950A (en) 1974-01-04 1974-12-24 Oscillators
GB55879/74A Expired GB1495949A (en) 1974-01-04 1974-12-24 Demand heart pacer

Family Applications Before (1)

Application Number Title Priority Date Filing Date
GB3619/77A Expired GB1495950A (en) 1974-01-04 1974-12-24 Oscillators

Country Status (9)

Country Link
US (1) US3926197A (en)
JP (1) JPS5098188A (en)
BE (1) BE824071A (en)
DE (1) DE2500109A1 (en)
FR (1) FR2256751A1 (en)
GB (2) GB1495950A (en)
IT (1) IT1030961B (en)
LU (1) LU71594A1 (en)
NL (1) NL7416177A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3110014A1 (en) * 1980-05-19 1982-03-25 Telectronics Pty. Ltd., Lane Cove, New South Wales EXTERNALLY RESETTABLE TACHYCARDY REGULATOR PACEMAKER

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4031899A (en) * 1976-01-22 1977-06-28 Vitatron Medical B.V. Long life cardiac pacer with switching power delivery means and method of alternately delivering power to respective circuit portions of a stimulus delivery system
US4088140A (en) * 1976-06-18 1978-05-09 Medtronic, Inc. Demand anti-arrhythmia pacemaker
IT1092941B (en) * 1977-03-19 1985-07-12 Biotronik Mess & Therapieg HEART RHYTHM REGULATOR CIRCUIT FOR DIFFERENT WAYS OF EXERCISE
US4203448A (en) * 1977-08-19 1980-05-20 Biotronik Mess- Und Therapiegerate Gmbh & Co. Programmably variable voltage multiplier for implanted stimulator
FR2440197A1 (en) * 1978-11-06 1980-05-30 Medtronic Inc ON-DEMAND CARDIAC STIMULATOR DETECTION AMPLIFIER
US4779617A (en) * 1986-10-06 1988-10-25 Telectronics N.V. Pacemaker noise rejection system
US5522856A (en) * 1994-09-20 1996-06-04 Vitatron Medical, B.V. Pacemaker with improved shelf storage capacity
US5699014A (en) * 1996-04-04 1997-12-16 Cardiac Pacemakers, Inc. Linear amplifier
US6321122B1 (en) 1998-07-22 2001-11-20 Cardiac Pacemakers, Inc. Single pass defibrillation/pacing lead with passively attached electrode for pacing and sensing
US5978710A (en) 1998-01-23 1999-11-02 Sulzer Intermedics Inc. Implantable cardiac stimulator with safe noise mode
US6501990B1 (en) 1999-12-23 2002-12-31 Cardiac Pacemakers, Inc. Extendable and retractable lead having a snap-fit terminal connector
US6463334B1 (en) 1998-11-02 2002-10-08 Cardiac Pacemakers, Inc. Extendable and retractable lead
CN106888011B (en) * 2017-01-09 2023-06-13 四川埃姆克伺服科技有限公司 Resistance type analog input interface circuit for servo controller

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3548831A (en) * 1968-02-06 1970-12-22 Donald Neil Mcleam Cardiac pacer circuit
US3528428A (en) * 1968-04-11 1970-09-15 American Optical Corp Demand pacer
US3547127A (en) * 1968-04-29 1970-12-15 Medtronic Inc Cardiac pacemaker with regulated power supply
US3677251A (en) * 1970-03-10 1972-07-18 Gen Electric Body organ stimulator with interference rejector
US3759266A (en) * 1970-10-07 1973-09-18 Medcor Inc Ng reset and voltage increasing circuits cardiac autopacer with variable refractory non linear feedback latchi
US3774619A (en) * 1972-01-10 1973-11-27 American Optical Corp Source testing cardiac pacer with source-independent rate circuitry and disabling means therefor

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3110014A1 (en) * 1980-05-19 1982-03-25 Telectronics Pty. Ltd., Lane Cove, New South Wales EXTERNALLY RESETTABLE TACHYCARDY REGULATOR PACEMAKER

Also Published As

Publication number Publication date
DE2500109A1 (en) 1975-10-09
LU71594A1 (en) 1975-06-17
GB1495950A (en) 1977-12-21
FR2256751A1 (en) 1975-08-01
BE824071A (en) 1975-05-02
JPS5098188A (en) 1975-08-04
IT1030961B (en) 1979-04-10
US3926197A (en) 1975-12-16
NL7416177A (en) 1975-07-08

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee