CN2030489U - External electrode pace-maker - Google Patents
External electrode pace-maker Download PDFInfo
- Publication number
- CN2030489U CN2030489U CN 87216732 CN87216732U CN2030489U CN 2030489 U CN2030489 U CN 2030489U CN 87216732 CN87216732 CN 87216732 CN 87216732 U CN87216732 U CN 87216732U CN 2030489 U CN2030489 U CN 2030489U
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- pacing
- circuit
- heart rate
- heart
- impulse
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Abstract
Disclosed is an external electrode pace-maker, belonging to a novelinstrument for medical saving. The utility model is characterized in that pacing impulse signal is 1 to 2 ten thousand HZ intermediate frequency punching electric current which goes into a body to do the pacing impulse for the heart through body surface electrode pulse and the body doesn't feel discomfort stimulating sense; the controlled system, such as a matching filter and T1121 monostable circuit, etc., are adopted at the same time, which can do the pacing impulse according to need, can do the pacing impulse synchronously and can according to the condition of a patient heart rate to do and stop the pacing impulse automatically; the utility model is provided with heart rate indication, spontaneous heart rate and heart rate discrimination indication, pacing impulse signal output indication and an output signal safety slice circuit. The utility model is mainly used for the first aid of a patient whose heart rate is slow even stop impulse, the pacing impulse can be reached in a few seconds, and the device can be used for a patient's monitoring treating for easily appearing heart rate slowness or stopping impulse.
Description
This utility model relates to a kind of medical first aid instrument---temporary heart pacemaker.
The temporary heart pacemaker of present domestic application is made up of low-frequency pulse producer, electrode, lead and power supply.Need during application the catheter electrode intravascular to be sent into heart or with the way of acupuncture electrode is sent into heart through thoracic wall and just can carry out cardiac pacing.So not only patient is had wound, and it is longer that the needed time is installed.Very inconvenient in particular for first aid.
The purpose of this utility model is that a kind of improved temporary artificial heart prosthesis's pacemaker will be provided, and it can make the pace-making heart utmost point needn't send into heart, can make cardiac pacing and be placed on body surface (pareordia).
The purpose of this utility model is achieved in that according to Physical Therapy medium and low frequency modulating frequency current depth of interaction big, still has this characteristic of physiological action of low-frequency current and skin does not have low-frequency electrostimulating to the sensation of this electric current sense of discomfort (these theories see professor Miu Hongshi chief editor's electrotherapy and phototherapy and Physical Therapy for details) simultaneously in the body depths.The electrode in vitro cardiac pacemaker of our design and manufacture is characterized in that being that this pacemaker mainly produces circuit, demand pacing control circuit and heart rate indication, pacing rhythm by the medium-frequency pulse pacing signal of 1～20,000 Hz and differentiates indicating circuit with the spontaneous rhythm of the heart and export indicating circuit and form.Be the guarantee effect degree of depth and reduce stimulation that the pacing signal that we adopt is the amplitude modulation electric current of intermediate frequency square wave of low-frequency square-wave modulation 1～20,000 Hz of per minute 40～100 times to thoracic wall skin.During as the cardiac pacing signal of telecommunication, electrode is placed on the body surface pareordia can affact ventricle, reaches the purpose of external heart utmost point cardiac pacing with this electric current.
This utility model is owing to adopted the medium-frequency pulse signal (pacing signal) of 1～20,000 Hz to produce circuit, and the demand pacing control circuit and the spontaneous rhythm of the heart are differentiated indicating circuit.So pacing electrode needn't be sent into heart when having application, electrode is placed on body surface can make cardiac pacing and the AT advantage of patient rapidly.
Concrete structure of the present utility model is provided by following embodiment and accompanying drawing thereof.
Fig. 1 is the electrical schematic diagram according to the electrode in vitro cardiac pacemaker that the utility model proposes.
Describe details and working condition in detail below in conjunction with Fig. 1 according to the concrete electrical schematic diagram that the utility model proposes.
This cardiac pacemaker comprises: control circuit, indication mechanism and the output voltage safety limiter system of the generation circuit of pacing signal, synchronous demand pacing.Narrate respectively below in conjunction with accompanying drawing 1.
Pacing signal produces circuit: be made up of astatic multivibrator, complementary positive feedback negative resistance type relaxor, low-frequency power amplifier, impedance matching box etc.By the astatic multivibrator that BG8, BG9 etc. forms, produce the square wave of 1～20,000 Hz, press the low-frequency power amplifier of positive pulse through BG10 by compositions such as D5 supply IC4.D5 etc. form electrical switch, and the conducting of D5 is subjected to the control of the complementary positive feedback negative resistance type relaxor be made up of BG3, BG4, BG5 etc.BG3, BG4 are the complementary switch that positive feedback connects in this agitator, constitute the negative resistance type relaxor jointly with timing element W1, C12.Its frequency of oscillation is by W1, C12 decision, and this pacemaker fixes on per minute 40～100 times.Pulse width is by R15, C12 decision, and rectangular pulse is passed to output stage by BG6.D5 conducting when positive pulse occurs.The pulse intermediate-freuqncy signal of 1～20,000 Hz that the oscillator signal that has just obtained producing by complementary positive feedback negative resistance type relaxor like this in the back of D5 changes.Be equivalent to produce the amplitude-modulated wave of intermediate-freuqncy signal of low-frequency square-wave modulation 1～20,000 Hz of per minute 40～100 times in the back of D5.This signal is exactly the signal that is used for cardiac pacing.This signal amplifies through the power amplifier of compositions such as IC4, then by impedance-matching transformer B and human body impedance coupling, acts on patient's pareordia and back, can carry out the intensity of cardiac pacing, pacing signal and be controlled by W2.
Synchronous demand pacing control circuit: by high resistant incoming line, automatic gain control circuit, join wave filter and T1121 monostable control circuit etc. and form.Wherein IC1 is that low consumed power operational amplifier, IC2 are middle gain operational amplifier.They have constituted matched filter (band filter) jointly.Can optionally amplify the QRS ripple that comes self-electrode, it involves other interfering signal that is higher than 30Hz to low frequencies such as P ripple, T ripples good filtering effect.The automatic gain control circuit that import by the high resistant of BG1 again and BG2 etc. constitutes has just been guaranteed picking up of QRS ripple.The QRS ripple that picks up is in order to promote controller work.Controller is made up of T1121 monostable circuit IC3 etc.From the positive pulse (QRS ripple) of IC2 outfan, trigger the T1121 monostable circuit, it carries out amplitude and width shaping to this triggering signal, controls complementary positive feedback negative resistance type relaxor through R14, C11 then.The positive pulse voltage peak-to-peak value of IC2 output is about 3 volts, in order to trigger IC3, makes the IC31 foot become electronegative potential by high potential, and the persistent period is determined by R13, C10.This circuit is selected in 0.1 second.When the spontaneous rhythm of the heart occurred, IC3 allowed C12 charge again by R14, C11 output electronegative potential, makes the high-new arrangement of relaxor pulse generation time, to reach the purpose of Distribute on Demand pacing signal.When the frequency of the spontaneous rhythm of the heart was higher than the frequency of pacing signal, therefore the monostable output of T1121 all faced upward the granting of having made pacing signal successively to the C12 charging.Promptly this moment, pacemaker stopped pace-making automatically.Be lower than when giving the frequency of setting up good pacing signal earlier with the spontaneous rhythm of the heart that should patient, pacemaker can be provided pacing signal automatically, gives and automatic pace-making.
Indication mechanism: heart rate indication is formed the also available gauge outfit demonstration of available digital demonstration by the heart rate detection circuit that IC5 etc. forms.The discriminating indication of the spontaneous rhythm of the heart and pacing rhythm is made up of D2, D3 etc.D2 is green, and it flashes is that signal by after the QRS ripple shaping of IC3 output is excited, and represents the situation of actual heart beating.D3 is red, and it flashes is to produce institute by pacing signal to excite the granting situation of expression pacing signal.The output indication of pacing signal is made up of R36, D12 and gauge outfit etc.
For the restriction output voltage guarantees in safety range, outfan at impedance-matching transformer B is connected to the amplitude limiter circuit of being made up of D10, D11, because this pace-making signal is the low frequency modulations electric current of intermediate frequency, its carrier frequency is higher at 1～20,000 Hz, to no electrolysis of tissue such as skins, so safer.
IC1, IC2-12V voltage provides by the negative pressure rectification circuit A point that BG11, BG12, D6, D7 etc. form.The complete machine power supply can adopt the dual-purpose low-voltage power supply mode of AC and DC.Easy to operate during for the consideration first aid, we now only use the direct current supply mode.
Claims (4)
1, instrument-electrode in vitro cardiac pacemaker is rescued in a kind of novel medical treatment.It is characterized in that being that this pacemaker mainly produces circuit, demand pacing control circuit and heart rate indication, pacing rhythm by the medium-frequency pulse pacing signal of 1～20,000 HZ and differentiates indicating circuit with the spontaneous rhythm of the heart and export indicating circuit and form.
2, produce circuit by the described medium-frequency pulse pacing signal of claim 1, it is characterized in that being that this circuit is by astatic multivibrators such as BG8, BG9; Complementary positive feedback negative resistance type such as BG3, BG4 relaxor; Electrical switch and IC4 constant power amplifier compositions such as D5.
3, it is characterized in that being that by the described demand pacing control circuit of claim 1 this circuit is made up of matching type band filter, automatic gain controller, pacing signal controller that BG1, BG2, IC1, IC2, IC3 etc. form.
4, it is characterized in that being that by the indication of the described heart rate of claim 1, the spontaneous rhythm of the heart and pacing rhythm discriminating indicating circuit they are made up of the luminous indicating circuit of heart rate check circuit, D2, D3 that IC5 etc. forms respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 87216732 CN2030489U (en) | 1987-12-25 | 1987-12-25 | External electrode pace-maker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 87216732 CN2030489U (en) | 1987-12-25 | 1987-12-25 | External electrode pace-maker |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2030489U true CN2030489U (en) | 1989-01-11 |
Family
ID=4830623
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 87216732 Withdrawn CN2030489U (en) | 1987-12-25 | 1987-12-25 | External electrode pace-maker |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2030489U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102614579A (en) * | 2011-01-28 | 2012-08-01 | 上海德本生物科技有限公司 | External percutaneous heart failure therapeutic instrument |
| CN103099677A (en) * | 2013-01-17 | 2013-05-15 | 杨明亮 | Method for building network in organism and method for periodic signal release through network |
-
1987
- 1987-12-25 CN CN 87216732 patent/CN2030489U/en not_active Withdrawn
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102614579A (en) * | 2011-01-28 | 2012-08-01 | 上海德本生物科技有限公司 | External percutaneous heart failure therapeutic instrument |
| CN103099677A (en) * | 2013-01-17 | 2013-05-15 | 杨明亮 | Method for building network in organism and method for periodic signal release through network |
| CN103099677B (en) * | 2013-01-17 | 2016-05-11 | 杨明亮 | A kind ofly build in vivo network and by the method for network signal deenergized period |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |