CN85103218A - The invention of the novel continuous EGC vector figure machine of directly tracing - Google Patents
The invention of the novel continuous EGC vector figure machine of directly tracing Download PDFInfo
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- CN85103218A CN85103218A CN 85103218 CN85103218A CN85103218A CN 85103218 A CN85103218 A CN 85103218A CN 85103218 CN85103218 CN 85103218 CN 85103218 A CN85103218 A CN 85103218A CN 85103218 A CN85103218 A CN 85103218A
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- cardiovectograph
- trace
- ecg curve
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Abstract
Existing heart biology electro-detection instrument has electrocardiograph and cardiovectograph.What electrocardiograph was traced is a dimension curve, can not show ecg curve directly and accurately when diseases such as diagnosis ventricular hypertrophy, myocardial infarction, intraventricular conduction defect.Cardiovectograph can only show two dimension curves of a cardiac cycle, can not diagnose arrhythmia.The present invention adopts the laser beam with electrocardiosignal deflection to be recorded on the mobile recorder chart, or adopts special recorder, or adopts printer to replace monitor to increase date processing, realizes continuous two dimension curves of a plurality of cardiac cycles.Along the unfolded direct graphy method of time shaft.It is the invention of the novel continuous EGC vector figure machine of directly tracing.
Description
The invention belongs to the heart biology electro-detection instrument that medical diagnosis is used.The measurement of physical quantity.
Existing EGC detecting Instrument has electrocardiograph and cardiovectograph.Both's defectiveness.
Electrocardiograph is the system of leading that adopts Ai Shi (Einthoven) equilateral triangle principle design, the input human body signal.Ai Shi (Einthoven) equilateral triangle principle still is a kind of hypothesis so far.Boolean's base (Burgen) with the galvanic couple test of anthropometric dummy, has confirmed that these three limits are unequal.Reason is: (1) heart does not hit exactly at human body; (2) body is not infinitely-great structure; (3) impedance strength of each tissue of human body is also not quite identical.Simultaneously, in the heart electricity excition process, in fact the voltage of central station be not equal to zero, and just near zero, experiment confirm is about 0.3～0.8mv.Therefore the hypothesis of Ai Shi equilateral triangle principle does not meet the structure and the physics principle of human body.
The amplitude of electrocardiographic wave (voltage) is the vector on face amount or the plane of structure, projects to the length on the axis of leads.Its size is relevant with the position of axis of leads, is the cosine value of face amount or plane of structure vector and axis of leads angle in fact.
Electrocardiogram is that cardiac electrical three-dimensional vector loop projects on the face, and upright projection records the projected length on the axis of leads on the paper that moves in time to axis of leads again, has just formed electrocardiogram.Because record is a dimension curve, so can not show three-dimensional vector loop intuitively, can not show turning to and twisting of three-dimensional vector loop faithfully.Also can't determine simultaneously locus and the traffic direction that each moment vector is definite.At the diagnosis ventricular hypertrophy, during diseases such as myocardial infarction, intraventricular block, not ideal enough.
Electrocardiographic time measurement is calculated by chart drive speed.When chart speed is 25mm/ during second, last only 2mm of the about 0.08 second width of QRS ripple on recorder chart, when chart speed is 50mm/ during second, width is 4mm, and the width of tracing line be 0.3-0.5mm, so the degree that reflects is accurate inadequately.
Hot pen recorder in the electrocardiograph, because the friction between pen and the recorder chart descends high frequency response, small wave form varies is covered; The ejection-type recorder stops up easily because the ink pipeline is thin.
The 230th page to the 232nd page record in " electrocardial vector graphics " book of writing according to Lin Shaofang etc., the Fukuda Denshi company of Japan produces the cardiovectograph of directly tracing.Its technical characterictic is: convert electrocardiosignal to numeral and store, read at a slow speed then, again digital translation is become analog quantity, depict three-dimensional vector loop by the XY monitor and project to a track on the face.Though what this machine showed is two dimension curves, remove the photographic imagery of domestic common cardiovectograph, operated cumbersome shortcoming, but when diagnosing the illness, can only show a cardiac cycle, do not reflect the relation between the excitement, so can not diagnose arrhythmia class disease.
Method of the present invention: time shaft of superposition on the transverse axis of vectorcardiogram coordinate system, the feature of electrocardiosignal is that interruption is discontinuous, and the speed that signal changes is fast, amplitude is bigger, so when not having signal, trace and a little be positioned at initial point, recorder chart is moved to the left along time shaft, measuring point is linked to be a horizontal linear, coordinate system this moment time shaft of adding up only; When signal, trace and a little leave initial point, because the speed that electrocardiosignal changes is very fast, measuring point is drawn back, form the point-like line, its speed is much larger than chart drive speed.So the time shaft of this moment can be ignored, coordinate is X, Y-axis, so just is equivalent to time shaft the bidimensional ecg curve of each cardiac cycle has been linked up, and just with electrocardio two dimension curves of many overlappings in the coordinate system, has launched along time shaft.
Employing changes the laser beam that moves with electrocardio, projects on the special heat sensitive recording chart that moves by certain speed; Or utilize the cardiovectograph of directly tracing, increase its memory capacity, and on former monitor, increase a form feeding device; Perhaps adopt normal printer and increase date processing, can realize successive bidimensional vectorcardiogram curve, at any time the unfolded direct graphy method of countershaft.
Fig. 1: laser beam is through reflection, and arrangement for deflecting projects the sketch map on the heat sensitive recording chart.
Fig. 2: the tumbler of reflecting mirror.
Fig. 3: laser beam deflection sketch map.
As Fig. 1, adopt (Frank) after anthropometric dummy galvanic couple trial correction system (1) the input human body signal that leads.Behind amplifier (2), receive on two solenoids (3), as Fig. 2, solenoid (3) is fixed between the Magnet (4) on the rotating axle (5).Two reflecting mirrors (7,8) are contained in respectively on the turning cylinder (5) of two solenoids (3), and solenoid (3) is because the induced magnetism scene that produces with the electrocardio variation deflects, and reflecting mirror (7,8) also rotates thereupon.As Fig. 3, following reflecting mirror (8) the change in electric left-right rotation of following one's inclinations goes up the coordinate values (page orientation as shown in Figure 1) of X-axis to determine laser beam (6) at heat sensitive recording chart (9); Upper reflector (7) change in electric of following one's inclinations is rotated up and down, to determine the coordinate values of laser beam (6) Y-axis on heat sensitive recording chart.Angle between the turning cylinder (5) of two reflecting mirrors (7,8) is 90 degree.Laser beam (6) is penetrated on a series of intersection points in heat sensitive recording chart (9) XY coordinate system.
Laser beam (6) through reflecting mirror (7,8) deflecting reflection drops on the heat sensitive recording chart (9), shows the track of laser spot operation.Along with the reach of heat sensitive recording chart (9), laser beam (6) is depicted on the heat sensitive recording chart (9) continuously the curve of each vectorcardiogram, has formed successive vectorcardiogram.
Under the deflection of laser beam, on recorder chart, do at the uniform velocity not mobile with the speed of 50 millimeters-4 meter per seconds at reflecting mirror.When translational speed was slow, the hot spot of laser beam relative time of staying on heat sensitive recording chart had just been grown, and common heat sensitive recording chart will be burnt, so must be equipped with special heat sensitive recording chart.This heat sensitive recording chart is equivalent under the common heat sensitive recording chart face coat or the back side of paper, increases one deck aluminium foil or heat proof material, makes the laser beam can be when fast moving, and burning-off surface thermo-sensitive material shows curve.Can when mobile at a slow speed, not burn heat sensitive recording chart again, do not make the vestige diffusion.
Laser instrument (10) adopts the carbon dioxide laser of pulse, and pulse frequency is 400 times/second, and per 2.5 milliseconds of hot spots are as time measurement unit, and is consistent with luminous point frequency on the common cardiovectograph fluorescent screen.
The laser beam of laser instrument (6) is by focus lamp (11).And the reflection of two reflecting mirrors (7,8), focus just in time drops on the heat sensitive recording chart, and on laser beam converged to a bit like this, heat was concentrated, and hot spot is dwindled, and figure is clear, and the power of laser instrument is fully used.
When the heat sensitive recording chart translational speed was very fast, such situation can appear.When laser beam moves when identical with page orientation, because relative motion reduces, the curve ratio of tracing out is actual will lack; When laser beam moves when opposite with page orientation, both speed additions, the curve of tracing out are than actual (tube) length, and this has just caused aliasing.In order to correct this aliasing, can increase the angle that laser beam sensing initial point and heat sensitive recording chart leave the initial point direction, just reduce laser beam sensing initial point and heat sensitive recording chart and enter the angle of initial point direction, can eliminate distortion, the angle of concrete increase and decrease will be decided according to chart drive speed.
Utilize the cardiovectograph of directly tracing, increase memory capacity, and on former monitor, a special form feeding device is installed, realize continuous EGC vector figure.
Fig. 4 is the form feeding device of special X-Y recorder.
As figure a form feeding device is installed under the recording stylus of X-Y recorder, recorder chart can steadily be passed through when pen is described curve by certain speed.As Fig. 4, an end of form feeding device drives feed roller (14) by a paper pushing motor (12) driven gear (13) by two gear meshing, and pressure roller (15) increases the frictional force between recorder chart (9) and the feed roller (14).The other end is made up of the jump ring (16) of being convenient to load and unload recorder chart (9) beam barrel and a pair of smooth anxiety wheel (17) of recorder chart (9) that makes.
Value according to the abscissa and the ordinate of bidimensional electrocardiosignal moves up and down pen (18) by motor (19) and determines the ordinate value; Motor (20) drives the longitudinal axis that motor (19), pen (18) are housed and makes move left and right, determines the abscissa value.Simultaneously recorder chart (9) is moved to the left with certain speed, like this, just makes that two dimension curves of each electrocardiosignal have launched in the XY coordinate system.
Adopt normal printer to replace special monitor,, also can realize successive vectorcardiogram as long as increase date processing.To convert three groups of electrocardiosignal X, Y of digital quantity, X, Z, the X among the Z to, add that with the priority of sampled point n(n is the ordinal number of image data successively in time) to multiply by K(K be the coefficient that two dimension curves launch amplitude) long-pending, become X
n+ nk, Z
nThree arrays of+nk, Xn+nk.Again with the array of original X, Y, Z combination bidimensional (Xn+nk, Yn), (Zn+nk, Yn), (Xn+nk, Zn).Again according to abscissa Xn+nk, the ascending ordering of the value of Zn+nk, Xn+nk, Dui Ying ordinate Yn, Yn, Zn also by the sequence arrangement that rearranges, read at a slow speed again, print so with it, see flow chart Fig. 5.
As adopt the printer that recorder chart can drive in the wrong direction when printing, can omit the program of ordering.
The present invention has following advantage:
Directly trace, can measure diagnosis immediately. The heart vectorcardiogram machine palpus photographic imagery of domestic present production operates cumbersome.
Curve is a bidimensional, has launched along time shaft.The fundamental figure that has kept vectorcardiogram as Fig. 6, continued to use the feature that electrocardiogram is traced continuously, make P ring (21), qrs loop (22), T encircles (23) priority that has had the time on a face, makes continuous EGC vector figure also set up the time concept of P-P interval (24), R-R interval (25), P-R interval (26).We can say that also Electrocardiographic P ripple (27), QRS ripple (28), T ripple (29) replaced by the P of vectorcardiogram ring (21), qrs loop (22), T ring (23), both advantage has been integrated.
Can trace many cardiac cycles on demand continuously, clearly show the relation of chamber excitement, exciting relation during week has remedied the deficiency that vectorcardiogram can only write down a cardiac cycle in diagnosis.
In successive figure, any one cardiac cycle can both demonstrate exciting order clearly, the size of moment vector, and the direction of the change of locus and vector rotation has remedied Electrocardiographic deficiency in diagnosis.
Cost is low, and expense is little, and the cost of entire machine is less than the cardiovectograph of commonness photograph imaging; The cost of use of machine is also less than common cardiovectograph.
St vector: continuous EGC vector figure possesses Electrocardiographic ST section displacement and the inc st vector of vectorcardiogram qrs loop simultaneously, so superior than the both.
The cardiovectograph of photographic imagery adopts fluorescent screen to show, so halation or overlapping often occur at E point place, makes initial vector, terminal vector, and the P ring, the T ring is difficult for identification.Just there is not this disadvantage in continuous EGC vector figure machine.
Do not have the fast moving that contacts between pen and the recorder chart, so can not influence fine variation, this point is better than electrocardiograph.
The time measurement of continuous EGC vector figure has two kinds of methods: the one, calculate the number of tracing a little; The 2nd, measure the horizontal range between the vector loop terminal, two kinds of methods complement each other, all accurate than electrocardiogram and vectorcardiogram, if: electrocardiogram is to the measurement of QRS ripple time, be to survey it to leave equipotential line and get back to horizontal range between the equipotential line, owing to trace line itself and just have 0.4mm wide, be difficult for measuring very accurately so width is a QRS ripple about 2mm; Vectorcardiogram is that the number that calculates luminous point measures the time, because initial vector, terminal vector speed is slower, and luminous point often is linked to be line, can't measure.
Can be used for children's: common vectorcardiogram often because children's mismatches, can't be taken complete vectorcardiogram photo, and continuous EGC vector figure then can write down many cardiac cycles, therefrom selects to have the figure of diagnostic significance.
Claims (10)
1, the electrocardiograph used of a kind of medical diagnosis, adopt electrocardiosignal to deliver to the method that electromagnetic recorder is traced ecg curve through amplification, the invention is characterized in described electrocardiograph, adopt laser instrument to produce laser beam, the line focus mirror focuses on and is fixed on the mirror deflection on the solenoid, the laser beam change in electric of following one's inclinations is projected on the special heat sensitive recording chart that moves by certain speed, realize successive two dimension curves, trace the method for ecg curve along the unfolded novel cardiovectograph of directly tracing of time shaft.
2, tracing the method for ecg curve according to the described cardiovectograph of claim (1), it is characterized in that the laser beam that described cardiovectograph adopts, is to produce pulse laser beam by carbon dioxide laser, and pulse frequency is as the measurement unit of time.
3, trace the method for ecg curve according to the described cardiovectograph of claim (1), it is characterized in that focus lamp that described cardiovectograph adopts between reflecting mirror and laser instrument, all within focal length, focus is on recorder chart for two reflecting mirrors.
4, trace the method for ecg curve according to the described cardiovectograph of claim (1), it is characterized in that the reflecting mirror in the described cardiovectograph is separately fixed on the center rotating shaft of two solenoids, by the angle of electrocardiosignal control deflection.
5, trace the method for ecg curve according to the described cardiovectograph of claim (1), the special heat sensitive recording chart that it is characterized in that described cardiovectograph employing is under the surperficial heat-sensitive layer of common heat sensitive recording chart or the back side of paper adds one deck aluminium foil or heat proof material.
6, trace the method for ecg curve according to the described cardiovectograph of claim (1), it is characterized in that the recorder chart placement location in the described cardiovectograph, will be according to the speed of paper feed, suitably increase the angle that laser beam sensing initial point and recorder chart leave the initial point direction, promptly reduce laser beam sensing initial point and recorder chart and enter the angle of initial point direction, revise the error that paper feed and light beam relative motion cause.
7, a kind ofly convert digital quantity by electrocardiosignal to through amplification and deposit memory in, read at a slow speed again, trace with two dimension curves, but can only show that the cardiovectograph of a cardiac cycle traces the method for ecg curve, the invention is characterized in that described cardiovectograph increases its memory capacity.And partly increase a form feeding device, or adopt printer to increase data processor to replace monitor,, trace the method for ecg curve along the unfolded novel cardiovectograph of directly tracing of time shaft to realize successive two dimension curves at X-Y recorder.
8, trace the method for ecg curve according to the described cardiovectograph of claim (7), the form feeding device that it is characterized in that described cardiovectograph, the one end is by a paper pushing motor (12) driven gear (13), by two gears (13), engagement drives feed roller (14), pressure roller (15) makes recorder chart (9) be close to feed roller (14), and the other end is made up of the jump ring (16) and a pair of nervous wheel (17) of loading and unloading recorder chart beam barrel.
9, trace the method for ecg curve according to the described cardiovectograph of claim (7), it is characterized in that the printer in the described cardiovectograph,, can save the collator of date processing as adopting the printer that can drive in the wrong direction.
10, trace the method for ecg curve according to the described cardiovectograph of claim (7), it is characterized in that data processor is the electrocardiographicdigital digital signals on the coordinate system transverse axis, increase a coefficient that the ordinal number of sampling in time increases gradually.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN85103218A CN85103218B (en) | 1985-04-01 | 1985-04-01 | The continuous EGC vector figure machine of directly tracing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN85103218A CN85103218B (en) | 1985-04-01 | 1985-04-01 | The continuous EGC vector figure machine of directly tracing |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN85103218A true CN85103218A (en) | 1987-01-17 |
| CN85103218B CN85103218B (en) | 1988-11-02 |
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ID=4793040
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN85103218A Expired CN85103218B (en) | 1985-04-01 | 1985-04-01 | The continuous EGC vector figure machine of directly tracing |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN85103218B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102038500A (en) * | 2010-12-02 | 2011-05-04 | 广东宝莱特医用科技股份有限公司 | Method for outputting file and overlapping waveforms of electrocardiograph |
| CN103322947A (en) * | 2013-06-09 | 2013-09-25 | 湖北省交通规划设计院 | Instrument for hard structural plane surface relief form field record |
| CN109864709A (en) * | 2019-01-29 | 2019-06-11 | 深圳市科曼医疗设备有限公司 | A kind of vectorcardiographic loop direction of rotation judgment method and device |
-
1985
- 1985-04-01 CN CN85103218A patent/CN85103218B/en not_active Expired
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102038500A (en) * | 2010-12-02 | 2011-05-04 | 广东宝莱特医用科技股份有限公司 | Method for outputting file and overlapping waveforms of electrocardiograph |
| CN102038500B (en) * | 2010-12-02 | 2013-03-06 | 广东宝莱特医用科技股份有限公司 | Method for outputting file and overlapping waveforms of electrocardiograph |
| CN103322947A (en) * | 2013-06-09 | 2013-09-25 | 湖北省交通规划设计院 | Instrument for hard structural plane surface relief form field record |
| CN103322947B (en) * | 2013-06-09 | 2016-06-08 | 湖北省交通规划设计院 | A kind of instrument for hard structural plane surface relief form field record |
| CN109864709A (en) * | 2019-01-29 | 2019-06-11 | 深圳市科曼医疗设备有限公司 | A kind of vectorcardiographic loop direction of rotation judgment method and device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN85103218B (en) | 1988-11-02 |
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