CN2577763Y - Inspecting instrument for atrioventricular bundle - Google Patents
Inspecting instrument for atrioventricular bundle Download PDFInfo
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- CN2577763Y CN2577763Y CN 02262847 CN02262847U CN2577763Y CN 2577763 Y CN2577763 Y CN 2577763Y CN 02262847 CN02262847 CN 02262847 CN 02262847 U CN02262847 U CN 02262847U CN 2577763 Y CN2577763 Y CN 2577763Y
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- bundle
- shi
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Abstract
The utility model relates to an instrument for measuring potential variation of a heart conduction system, which comprises heart-electrical channel electrodes, an amplifier, an A/D card, a computer, corresponding softwares and a printer. The utility model is characterized in that the heart-electrical channel electrodes are provided with His bundle channel electrodes and reference channel electrodes for extracting ambient noise in a parallel mode. The utility model realizes the body surface pulse-chasing detection of the His bundle, and can detect the overall process of the His bundle potential variation. Because the utility model can carry out the treatment of background noise deducting for His bundle electric signals through hardwares and softwares, the utility model has the advantages of clear and visible His bundle waveform and little error of measured parameters; the error is in a range from-1 ms to +1 ms.
Description
Technical field
This utility model relates to a kind of instrument that is used to measure intracardiac conducting system potential change.
Background technology
His bundle electrogram is a curve of tracing intracardiac conducting system potential change.Normal cardiac conduction is a sinuatrial node---atrioventricular bundle---atrioventricular node---in the uncommon formula bundle---uncommon formula Shu Yuanduan---left and right sides bundle branch---Pu incline fiber---ventricular muscles, the His bundle electrogram reflection be small potential change in the uncommon formula bundle process of excitation.
Uncommon formula bundle electrograph has higher clinic value: 1. can be used for diagnosing the atrioventricular block position: prolong often can prompt for during the HV and forge stopband; The PA time lengthening, normal person of HV time then is retardance on the Xi Shi bundle.During the atrioventricular block of III degree, the V wavefront has the H ripple, no H ripple behind the P ripple, and the HV time is normal, and site of block is on the Xi Shi bundle; No H ripple behind the P ripple, the V wavefront does not have the H ripple, often points out site of block below atrioventricular node.2. providing during the objective indicator of implanting a pacemaker: I, II degree chamber conducting tissue and intraventricular block patient's the HV, is the indication of implanting a pacemaker when surpassing 55 milliseconds.The III degree atrioventricular block of forging is also for installing the indication of pacemaker.3. legacy system generaI investigation: the conduction block HV time lengthening that atrioventricular node is following, electrocardiogram is normal sometimes, and the PR time, this kind situation was more common in the old people also less than 200 milliseconds.Thereby the old people is carried out His bundle electrogram detect, help the early discovery conduction block, carry out preventing and controlling.4. the analysis of His bundle electrogram has certain value to the research of arrhythmia medicine.
Though the deflection in His bundle electrogram diagram technology is the important foundation stone that clinical cardiac electrophysiology is checked, because its amplitude is extremely faint, successfully detect this small-signal, difficulty is sizable.At present, the His bundle electrogram detector adopts in the body more and detects, and detects but the method that detects in the body belongs to wound, and certain danger is arranged, and have can not the repeated measurement dynamic change etc. shortcoming, so the use of Xi Shi bundle detector is very restricted.Decimal Xi Shi bundle detector carries out the Xi Shi bundle from body surface and detects, and the method for employing has superposed average method and space correlation method.Though but that this method of superposed average method has is painless, non-invasive, no danger, can detect advantages such as dynamic change repeatedly, but owing to need the stack of hundreds of cardiac cycles, be difficult to find constant superposition trigger jitter, the his' bundle potential that can not show each cardiac cycle, especially shortcoming such as influential verification and measurement ratio under ill state, though the space correlation method can show his' bundle potential by hop-by-hop, what in fact detect is not the overall process of his' bundle potential.Carry out the detection of body surface for other method by the His bundle electrogram of fighting, some exploratory study reports were once arranged both at home and abroad, but fail all the time to make a breakthrough at guardian techniques such as background noise inhibition for many years, do not develop the instrument that can satisfy clinical use so far as yet.
Summary of the invention
For overcoming problems of the prior art, this utility model provides a kind of can restraint detector by the body surface Xi Shi that fights that the pursue intracardiac hop-by-hop his' bundle potential of noinvasive ground continuous detecting overall process, that waveform is clear, error rate is low.
By the body surface Xi Shi bundle detector of fighting, comprise electrocardiac channel electrode, amplifier, A/D card, computer, corresponding software and printer, it is characterized in that:
Be provided with Xi Shi beam passage electrode and the reference channel electrode that extracts ambient noise side by side with electrocardiac channel.
Restraint detector according to above-mentioned by the body surface Xi Shi that fights, it is characterized in that: described Xi Shi beam passage electrode is made up of an anelectrode and a negative electrode that is positioned at the horizontal midaxillary line of right fourth, fifth intercostal of breastbone that is positioned at the horizontal midaxillary line of left border of sternum fourth, fifth intercostal; Described reference channel electrode is made up of an anelectrode and a negative electrode that is placed on the pit of the stomach place that is placed on the pit of the stomach place.
The utlity model has the advantage of several respects:
(1), this device has been realized that the body surface of Xi Shi bundle pursues the detection of fighting, and can have been detected the overall process that his' bundle potential changes.
(2), use this equipment to belong to non-invasive to detect, patient's no pain, detecting operation is convenient, can detect dynamic change repeatedly.
(3), since this instrument by in hardware and software, the deflection in His bundle electrogram signal being carried out the background correction noise processed, so that Xi Shi restraints waveform is high-visible, the measurement parameter error is little, error is ± 1ms.Less demanding to measuring condition simultaneously, need not in screened room, to detect.
(4), this utility model is because software employing modularization programming has maintainability and extendibility preferably.
Description of drawings
Fig. 1 is this utility model structural representation,
Fig. 2 is this detector gained result waveform displayed map on computers,
Fig. 3 is signal processing flow figure.
The specific embodiment
Should comprise electrocardiac channel electrode 1, Xi Shi beam passage electrode 2, reference channel electrode 3, amplifier 4, A/D card 5, computer and corresponding software 6 and printer 7 by the body surface Xi Shi bundle detector of fighting, see Fig. 1.
Its electrode comprises positive and negative electrocardiac channel electrode 1, is provided with positive and negative Xi Shi beam passage electrode 2 and the positive and negative reference channel electrode 3 that extracts ambient noise side by side with positive and negative electrocardiac channel electrode 1.
The positive pole of described Xi Shi beam passage electrode 2 is positioned at the horizontal midaxillary line of left border of sternum fourth, fifth intercostal in using, and negative electrode is positioned at the horizontal midaxillary line of right fourth, fifth intercostal of breastbone; During using, described positive and negative reference channel electrode 3 all is placed on the pit of the stomach place.
Wherein the hardware components effect is respectively:
Electrocardiac channel electrode 1, Xi Shi beam passage electrode 2 and reference channel electrode 3 all adopt adsorption electrode; With the close metal hollow cylinder electrode that connects of rubber bulb, its bottom annulus is adsorbing with air pressure and body surface.Its role is to directly extract signal message.
The effect of A/D capture card 5 is: the deflection in His bundle electrogram signal of amplifier output is successive, has only through sampling and after quantizing to become digital signal, could carry out digital processing to it.Adopt with quantification work and finish by A/D card 5.Gather data acquisition board in the system with the usb bus compatibility, can insert computer through USB cable, have 32 tunnel single-ended analogue signal input channels, the A/D conversion is distinguished as 16 (13.5 effectively), be 5 μ s conversion time, the aanalogvoltage input range is ± 10V, and the programme-controlled gain scope is 1,2,4,8 etc.Input signal amplitude can be transferred to suitable scope through the programme-controlled gain instrument amplifier, guarantees the best transition precision.
The purpose that detects His bundle electrogram is the measure of time during realizing four, P-A at interval, A-H at interval, the H ripple is wide, H-V at interval.The specific implementation process is as follows:
Extract our desired signal (electrocardiosignal, Xi Shi bundle signal, ambient noise signal) input amplifier by the electrode that is placed in body surface and be amplified to the degree that to be gathered by the A/D card, simultaneously signal is carried out certain date processing; Analyze software for display by data acquisition process based on the Win98 platform of hardware configuration design, A/D is sticked into the row programming, the continuous signal of pair amplifier output is carried out continuous acquisition, it is become digital signal and reads in computer through the USB mouth, obtain electrocardiogram and Xi Shi bundle figure through the background noise deduction, and on indicator screen, show in real time both waveforms, software also provides data storage and analytic function simultaneously, by carrying out data analysis, can obtain required Measuring Time parameter to storing the data waveform playback.
The signal that the Xi Shi beam passage obtains at first is x (t)+h (t)+n
1(t), (wherein there is the electrocardiosignal in the Xi Shi bundle signal in x (t) representative, and h (t) represents the Xi Shi bundle signal that will obtain, n
1(t) there is the ambient noise signal (comprising myoelectricity interference, alternating current disturbance etc.) in the Xi Shi bundle signal in representative, this signal by certain Filtering Processing filtering x (t) after, signal is h (t)+n
1(t); The signal that reference channel obtains is n
2(t), extraction be the ambient noise signal, be approximately equal to n
1(t), so x (t)+h (t)-n
2(t) be approximately equal to h (t), promptly obtained desired Xi Shi bundle signal, see Fig. 3.
Claims (2)
1, by the body surface Xi Shi bundle detector of fighting, comprise electrocardiac channel electrode, amplifier, A/D card, computer, corresponding software and printer, it is characterized in that:
Be provided with Xi Shi beam passage electrode and the reference channel electrode that extracts ambient noise side by side with the electrocardiac channel electrode.
2, according to claim 1 by the body surface Xi Shi bundle detector of fighting, it is characterized in that: described Xi Shi beam passage electrode is made up of an anelectrode and a negative electrode that is positioned at the horizontal midaxillary line of right fourth, fifth intercostal of breastbone that is positioned at the horizontal midaxillary line of left border of sternum fourth, fifth intercostal; Described reference channel electrode is made up of an anelectrode and a negative electrode that is placed on the pit of the stomach place that is placed on the pit of the stomach place.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02262847 CN2577763Y (en) | 2002-06-29 | 2002-06-29 | Inspecting instrument for atrioventricular bundle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02262847 CN2577763Y (en) | 2002-06-29 | 2002-06-29 | Inspecting instrument for atrioventricular bundle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2577763Y true CN2577763Y (en) | 2003-10-08 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 02262847 Expired - Fee Related CN2577763Y (en) | 2002-06-29 | 2002-06-29 | Inspecting instrument for atrioventricular bundle |
Country Status (1)
| Country | Link |
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| CN (1) | CN2577763Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100493448C (en) * | 2007-04-26 | 2009-06-03 | 中国科学技术大学 | Body surface detection method and device for high frequency wave of repolarization of ventricle |
| CN106456032A (en) * | 2014-06-05 | 2017-02-22 | 陈光人 | Systems and methods for detecting ecg subwaveforms |
-
2002
- 2002-06-29 CN CN 02262847 patent/CN2577763Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100493448C (en) * | 2007-04-26 | 2009-06-03 | 中国科学技术大学 | Body surface detection method and device for high frequency wave of repolarization of ventricle |
| CN106456032A (en) * | 2014-06-05 | 2017-02-22 | 陈光人 | Systems and methods for detecting ecg subwaveforms |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20031008 Termination date: 20100629 |