GB1495949A - Demand heart pacer - Google Patents
Demand heart pacerInfo
- 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
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).
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 |
---|---|---|---|
GB55879/74A Expired GB1495949A (en) | 1974-01-04 | 1974-12-24 | Demand heart pacer |
GB3619/77A Expired GB1495950A (en) | 1974-01-04 | 1974-12-24 | Oscillators |
Family Applications After (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) | GB1495949A (en) |
IT (1) | IT1030961B (en) |
LU (1) | LU71594A1 (en) |
NL (1) | NL7416177A (en) |
Cited By (1)
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)
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)
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 |
-
1974
- 1974-01-04 US US430827A patent/US3926197A/en not_active Expired - Lifetime
- 1974-12-12 NL NL7416177A patent/NL7416177A/en not_active Application Discontinuation
- 1974-12-24 GB GB55879/74A patent/GB1495949A/en not_active Expired
- 1974-12-24 GB GB3619/77A patent/GB1495950A/en not_active Expired
- 1974-12-28 JP JP50004215A patent/JPS5098188A/ja active Pending
-
1975
- 1975-01-02 FR FR7500037A patent/FR2256751A1/fr not_active Withdrawn
- 1975-01-03 DE DE19752500109 patent/DE2500109A1/en active Pending
- 1975-01-03 IT IT19030/75A patent/IT1030961B/en active
- 1975-01-03 BE BE152120A patent/BE824071A/en unknown
- 1975-01-06 LU LU71594A patent/LU71594A1/xx unknown
Cited By (1)
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 |
---|---|
US3926197A (en) | 1975-12-16 |
GB1495950A (en) | 1977-12-21 |
DE2500109A1 (en) | 1975-10-09 |
FR2256751A1 (en) | 1975-08-01 |
BE824071A (en) | 1975-05-02 |
LU71594A1 (en) | 1975-06-17 |
IT1030961B (en) | 1979-04-10 |
JPS5098188A (en) | 1975-08-04 |
NL7416177A (en) | 1975-07-08 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
GB1316291A (en) | Electronic heart pacing apparatus | |
GB1495949A (en) | Demand heart pacer | |
US4476868A (en) | Body stimulator output circuit | |
GB1108858A (en) | Multimode cardiac pacer | |
US3693626A (en) | Demand pacer with heart rate memory | |
IL31473A (en) | Demand pacemaker | |
GB1242543A (en) | Heart defibrillator | |
JPS6416228A (en) | Power monitor | |
GB1322556A (en) | Demand pacemakers | |
GB1303016A (en) | ||
GB1484504A (en) | Cardiac pacers | |
GB1335679A (en) | Pacemakers | |
IL41190A (en) | Externally controlled implantable cardiac pacer | |
US3867949A (en) | Cardiac pacer with voltage doubler output circuit | |
FR2241287A1 (en) | Circuit for heart implant pacemaker - reduced charging time of output capacitor supplying stimulation pulses | |
GB1419531A (en) | Rechargeable cardiac pacemaker | |
FR2374024A1 (en) | Battery operated implanted cardiac stimulator - has signal generator with D=A converter to provide basic signal repetition rate | |
GB1298189A (en) | Electromedical apparatus | |
GB1360066A (en) | Stimulator circuit for a body organ | |
CA1098590A (en) | Demand pacer having reduced recovery time | |
US4087637A (en) | Pacer pulse width signaling system for telephonic communication | |
GB1520671A (en) | Heart pacemakers | |
GB921992A (en) | Electric muscle stimulator | |
US3877438A (en) | Pacer with self-adjusting output | |
GB1517379A (en) | Electrical circuit means powered by a rechargeable batter |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed [section 19, patents act 1949] | ||
PCNP | Patent ceased through non-payment of renewal fee |