US3913588A - Heart difibrillator with independently operating starting pulse generator - Google Patents

Heart difibrillator with independently operating starting pulse generator Download PDF

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Publication number
US3913588A
US3913588A US128044A US12804471A US3913588A US 3913588 A US3913588 A US 3913588A US 128044 A US128044 A US 128044A US 12804471 A US12804471 A US 12804471A US 3913588 A US3913588 A US 3913588A
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United States
Prior art keywords
pulse
electrodes
high voltage
mallet
mechanical
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Expired - Lifetime
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US128044A
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English (en)
Inventor
Antonius Maria Klomp
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US Philips Corp
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US Philips Corp
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Assigned to HONEYWELL B.V. AMSTERDAM,A SUBSIDIARY OF THE NETHERLANDS OF HONEYWELL INC. A DE CORP. reassignment HONEYWELL B.V. AMSTERDAM,A SUBSIDIARY OF THE NETHERLANDS OF HONEYWELL INC. A DE CORP. ASSIGNOR ASSIGNS THE ENTIRE INTEREST, SUBJECT TO LICENSE RECITED. (SEE RECORDS FOR DETAILS). Assignors: U.S. PHILIPS CORPORATION
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    • 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
    • A61N1/3904—External heart defibrillators [EHD]

Definitions

  • a heart defibrillator having mechanical means for producing a mechanical energy pulse which is then con- Foreign Application ty Data verted to an electrical energy pulse by a piezo-electric Mar. 8, 1970 Netherlands 7005064 element, the electrical energy pulse activating a high voltage pulse supplying means which delivers a high [52] US. Cl 128/419 D voltage pulse to defibrillator electrodes pressed [51] Int. Cl. A61N 1/36 against a patient. Since the high voltage pulse is deliv- [58] Field of Search 128/419 D, 419 P ered in response to a pulse which derives its energy from a mechanical rather than an electrical source,
  • the invention relates to a heart defibrillator comprising a high voltage pulse generator having at least one electrode for applying an electrical'pulse to a patient and a device, coupled to an externally operable control member, for activating the high voltage pulse generator.
  • Such a heart defibrillator is known from the US. Pat. No. 3,l96,877.
  • the heart defibrillator described therein comprises an electrode holder in which a pushbutton is mounted. When this push-button is depressed, a switch is operated so that a relay is energized, said relay activating the high voltage pulse generator.
  • a drawback of the use of a switch producing a shortcircuit in a circuit arrangement is that this short-circuit may also be caused by faults, for example, by a shortcircuit in a supply line.
  • An untimely applied defibrillation pulse of a heart defibrillator may have serious consequences and it is therefore important to have a failsafe circuit available for this purpose.
  • the invention has for its object to comply with this requirement with the aid of simple means.
  • the heart defibrillator set forth in the preamble according to the invention is characterized. in that the device for activating the high voltage pulse generator comprises a member for converting a mechanical pulse into an electrical pulse, the control member being coupled to said converting member by means of a mechanism for transmitting a mechanical pulse.
  • a starting pulse is supplied by a member for converting a mechanical pulse into an electrical pulse, this mechano-electrical member acting as an independently operating starting pulse generator which cannot, contrary to the known devices for activating the high voltage pulse generator, give a starting pulse due to shortcircuits or similar faults.
  • the circuit to which the starting pulse is supplied can be easily so proportioned that short-circuits or other failures can never release sufficient power to act as a starting pulse.
  • control member and the mechano-electrical member are accommodated in an electrode holder of the heart defibrillator. It may be advantageous to mount the control member in such a manner that it becomes operable only after a minimum pressure on an electrode is exceeded.
  • a mechano-electrical member contains a piezo-electrical material to which a mechanical pulse is applied by a mallet when the control member is depressed.
  • F IG. 1 is a diagrammatic perspective view of a heart defibrillator
  • FIG. 2 is a cross-sectional view of an electrode holder according to the invention, provided with a control member and a mechano-electrical member, and
  • FIG. 3 is a circuit diagram for a starting mechanism for the high voltage pulse generator of a heart defibrillator according to the invention.
  • the heart defibrillator shown in FIG. 1 has a housing 1 in which all electronic control means are accommodated and which is preferably provided with a keyboard 2, with the aid of which the strength of the defibrillation pulse to be supplied can be selected.
  • a meter 3 indicates, for example, the maximum potential for the pulse to be supplied.
  • the housing 1 with accessories may be of a portable design, in which case an energy source, for example, in the form of a 24 V battery, is incorporated in the housing.
  • the housing may also be provided with a connection for an external energy source, which may serve both for external energy supplies and for charging an internal energy source, if applicable.
  • Via a high voltage cable 4 electrodes 5 and 6 which preferably form part of electrode holders 7 and 8, are connected to the housing 1.
  • the electrode holders 7 and 8 which are preferably made of an electrically insulating synthetic resin, are provided with handles 9 and 10, supporting rims 11 and 12, and have widened ends 13 and 14 on which the electrodes 5 and 6 are mounted. In a preferred embodiment small electrodes are mounted on the electrode holders for use on children.
  • both electrode holders are preferably provided with handles.
  • one of the electrodes may be mounted, for example, on an examining table.
  • Various electrodes may also be connected to a single handle.
  • a control member 15 is mounted according to the invention, which control member is coupled to a mechanoelectrical converter 16.
  • a tension spring 18 is provided for this purpose which is coupled to a push-button 17, and which is tensioned by depressing the push-button 17. Further depressing of the push-button disengages, for example, by means of a slanted side portion 19 of the pushbutton 17, a pawl 20 from a slot 21 so that a second tension spring 22, which is also pretensioned by the depressing of the push-button, drives a mallet 23 against a block 24 of piezo-electrical material.
  • the tension spring 18 forces the mallet 23 back again and hence drives the pawl 20 into the slot 21 again. Due to the me chanical pulse exerted on the piezo-electrical material by the mallet 23, an electrical pulse is generated which is used as a starting pulse. It is irrelevant for the invention how the piezo-electrical member is constructed or how the mechanical pulse is produced.
  • the piezoelectrical member may be replaced by a coil of electrically conducting wire, in which a bar of magnetized material can be displaced in the axial direction by means of an operating mechanism. The magnetic flux variation caused by this displacement will generate an electrical pulse on the ends of the coil wire, which can be used as a starting pulse.
  • control member and the mechano-electrical converter may also be accommodated elsewhere inside the apparatus, for example, in the housing 1.
  • physician will determine the instant at which a defibrillation pulse is to be supplied, and in such a case incorporation in an electrode holder is to be preferred.
  • electrode holders of a simple shape are preferably used, in which case mounting in or on the housing may be more advantageous.
  • the defibrillation pulse must be applied in the correct phase with the cardiogram.
  • This synchronization is provided by an electronic circuit which is automatically actuated by the cardiogram because the latter releases the defibrillation pulse after the generating of a starting pulse only at the correctinstant determined by the electro-cardiogram.
  • the cardiogram recorded during the treatment can cause a lamp mounted in the electrode holder to light up so that the physician can follow the action of the heart.
  • FIG. 3 shows very schematically aa preferred embodiment for some circuit elements for a heart defibrillator.
  • a potential pulse supplied by the mechanoelectrical converter is supplied via a line 30 to a control device 31 and forms for this control device the starting signal, for example, by bringing a transistor out of the cut-off condition, on which a relay 32 is energized, perhaps delayed with electronic means for'adaptation to the cardiogram, which cardiogram signal is also supplied to the control device 31.
  • This relay 32 operates a switching mechanism 33 having, for example, two switches 34 and 35. If the relay 32 is not energized, the switching mechanism 33 is in the charging position corresponding to the solid-line position for the switches 34 and 35. In this position a capacitor 36, having a capac'iswitches 34 and 35 assume the broken-line position.
  • the capacitor 36 discharges via an inductance 38 of, for example, 0.2 H and a patient lying between the electrodes 5 and 6 in, for example, approximately 5 ms.
  • the switches 34 and 35 snap back immediately into the charging position and a next defibrillation pulse can be given by depressing thecontrol member.
  • a heart defibrillator comprising:
  • a heart defibrillator comprising;
  • a piezo-electric element positioned in the path of said mallet to receive a sharp blow from said mallet when said mallet is driven by said spring and to convert the mechanical energy of the mallet into an electrical energy pulse;

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  • Health & Medical Sciences (AREA)
  • Cardiology (AREA)
  • Heart & Thoracic Surgery (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)
US128044A 1970-04-08 1971-03-25 Heart difibrillator with independently operating starting pulse generator Expired - Lifetime US3913588A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL7005064A NL7005064A (enExample) 1970-04-08 1970-04-08

Publications (1)

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US3913588A true US3913588A (en) 1975-10-21

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ID=19809806

Family Applications (1)

Application Number Title Priority Date Filing Date
US128044A Expired - Lifetime US3913588A (en) 1970-04-08 1971-03-25 Heart difibrillator with independently operating starting pulse generator

Country Status (6)

Country Link
US (1) US3913588A (enExample)
BE (1) BE765395A (enExample)
DE (1) DE2111731A1 (enExample)
FR (1) FR2089332A5 (enExample)
GB (1) GB1335761A (enExample)
NL (1) NL7005064A (enExample)

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4088138A (en) * 1974-01-02 1978-05-09 Cardiac Resuscitator Corp. Cardiac resuscitator and monitoring apparatus
US4099519A (en) * 1977-01-14 1978-07-11 Warren Fred E Diagnostic device
DE2938708A1 (de) * 1978-09-27 1980-07-03 Philips Nv Defibrillator
USRE30750E (en) * 1972-05-15 1981-09-29 Cardiac Resuscitator Corporation Cardiac resuscitator and monitoring apparatus
US4510935A (en) * 1981-10-28 1985-04-16 Cardiac Recorders Limited Cardiac defibrillator
US4823796A (en) * 1987-04-03 1989-04-25 Laerdal Manufacturing Corp. Defibrillator circuit for producing a trapezoidal defibrillation pulse
US5237989A (en) * 1991-04-04 1993-08-24 Physio-Control Corporation Cardiac defibrillator with movable contact switch
US5312440A (en) * 1991-03-28 1994-05-17 Siemens Aktiengesellschaft Implantable defibrillator arrangement
WO2001024878A1 (en) * 1999-10-07 2001-04-12 Ge Medical Systems Information Technologies, Inc. Apparatus and method to power a medical device using stored mechanical power
US7229591B2 (en) 1997-08-21 2007-06-12 Ethicon, Inc. Lumen sterilization device and method
US20090313542A1 (en) * 2008-06-12 2009-12-17 Immersion Corporation User Interface Impact Actuator

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3613283A1 (de) * 1986-04-19 1987-10-22 Osypka Peter Herzschrittmacher mit einem steuerteil zur erhoehung der herz-ruhefrequenz
DE4110404A1 (de) * 1991-03-28 1992-10-01 Siemens Ag Implantierbare defibrillatoranordnung

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3224447A (en) * 1962-06-25 1965-12-21 Mine Safety Appliances Co Electrodes for ventricular defibrillator
US3563245A (en) * 1968-03-15 1971-02-16 Donald Neil Mclean Biologically implantable and energized power supply

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3224447A (en) * 1962-06-25 1965-12-21 Mine Safety Appliances Co Electrodes for ventricular defibrillator
US3563245A (en) * 1968-03-15 1971-02-16 Donald Neil Mclean Biologically implantable and energized power supply

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
USRE30750E (en) * 1972-05-15 1981-09-29 Cardiac Resuscitator Corporation Cardiac resuscitator and monitoring apparatus
US4088138A (en) * 1974-01-02 1978-05-09 Cardiac Resuscitator Corp. Cardiac resuscitator and monitoring apparatus
US4099519A (en) * 1977-01-14 1978-07-11 Warren Fred E Diagnostic device
DE2938708A1 (de) * 1978-09-27 1980-07-03 Philips Nv Defibrillator
US4510935A (en) * 1981-10-28 1985-04-16 Cardiac Recorders Limited Cardiac defibrillator
US4823796A (en) * 1987-04-03 1989-04-25 Laerdal Manufacturing Corp. Defibrillator circuit for producing a trapezoidal defibrillation pulse
US5312440A (en) * 1991-03-28 1994-05-17 Siemens Aktiengesellschaft Implantable defibrillator arrangement
US5237989A (en) * 1991-04-04 1993-08-24 Physio-Control Corporation Cardiac defibrillator with movable contact switch
US7229591B2 (en) 1997-08-21 2007-06-12 Ethicon, Inc. Lumen sterilization device and method
WO2001024878A1 (en) * 1999-10-07 2001-04-12 Ge Medical Systems Information Technologies, Inc. Apparatus and method to power a medical device using stored mechanical power
US6556867B1 (en) * 1999-10-07 2003-04-29 General Electric Company Apparatus and method to power a medical device using stored mechanical power
US20090313542A1 (en) * 2008-06-12 2009-12-17 Immersion Corporation User Interface Impact Actuator
US9733704B2 (en) * 2008-06-12 2017-08-15 Immersion Corporation User interface impact actuator
US10365720B2 (en) * 2008-06-12 2019-07-30 Immersion Corporation User interface impact actuator

Also Published As

Publication number Publication date
FR2089332A5 (enExample) 1972-01-07
NL7005064A (enExample) 1971-10-12
DE2111731A1 (de) 1971-10-21
BE765395A (fr) 1971-10-06
GB1335761A (en) 1973-10-31

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Owner name: HONEYWELL B.V. AMSTERDAM, HOLLAND A SUBSIDIARY OF

Free format text: ASSIGNOR ASSIGNS THE ENTIRE INTEREST, SUBJECT TO LICENSE RECITED.;ASSIGNOR:U.S. PHILIPS CORPORATION;REEL/FRAME:003979/0375

Effective date: 19820305