CN2513515Y

CN2513515Y - 4-D cardioelectric display

Info

Publication number: CN2513515Y
Application number: CN 01245249
Authority: CN
Inventors: 沈廉
Original assignee: Individual
Current assignee: Individual
Priority date: 2001-08-07
Filing date: 2001-08-07
Publication date: 2002-10-02
Anticipated expiration: 2011-08-07

Abstract

Four-dimensional electrocardiogram display is an instrument used for medical detections and analysis. The electrocardiograph consists of a human lead electrode, a Frank correction circuit, a tri-axial preamplifier, a tri-axial storage circuit, a driving amplifier, a Y-axis output circuit, an X-axis output circuit, a recorder, a function transfer circuit, a status indicating circuit, an electrocardiograms interference indicating circuit and a V-signal generating circuit. The human lead electrode, the Frank correction circuit, the tri-axial preamplifier, the tri-axial storage circuit and the driving amplifier are sequentially connected in series. The output end of the driving amplifier is respectively connected with the input ends of the Y-axis output circuit and the X-axis output circuit. The output end of the V-signal generating circuit is directly connected with the input end of the X-axis output circuit. The output ends of the Y-axis output circuit and the X-axis output circuit are respectively connected with the recorder. The output end of the tri-axial preamplifier is connected with the electrocardiograms interference indicating circuit. The output end of the function transfer circuit is connected with the output ends of the status indicating circuit, the tri-axial storage circuit and the driving amplifier.

Description

Four-dimensional electrocardio display

One, technical field

This utility model is the instrument that a kind of medical check and analysis are used, and belongs to that Medical Instruments makes

Technical field.

Two, background technology

The electrocardiogram technology as the most frequently used electrocardiographic examination technology continued to use a lot of year, by Y-axis (projection of dynamic three-dimensional vectorcardiographic loop is the projection variable again), X-axis (constant velocity axis is produced by machine) and constituting.Obviously, the single shaft variable system of unidimensional reprojection will be lost a lot of ecg informations.Add the aliasing after the reprojection and the too low major defects such as (only about 50Hz) of response frequency of mechanical pin, its development prospect is limited." the electrocardial vector diagram technology " that result from the fifties is three dimensional graphics, its quantity of information is much larger than electrocardiogram, but because of not reflecting its time limit on the inherent figure of its isoelectric level time period, so lack the time limit information between the P.QRS.T ripple, do not reflect yet and respectively involve N the time relationship between the cardiac cycle, powerless to the arrhythmia diagnosis.This defective has seriously influenced its application in clinical.High frequency ECG is that broadening detects frequency on Electrocardiographic basis, widens the QRS wave group, still be the one dimension graph technology, and it only is that to the ordinary electrocardiogram technology one is additional.

The purpose of this utility model just provides on a kind of basis of three three dimensional graphics at vectorcardiogram and introduces " time shifting " information, forms the electrograph instrument of the vector of four four-dimension.

Three, summary of the invention

Four-dimensional electrocardio display of the present utility model is by the human body crosslinking electrode, the Frank correcting circuit, three preamplifiers, three storage circuits, driving amplifier, the Y-axis output circuit, the X-axis output circuit, monitor, function conversion circuit, condition indication circuit, electrocardio disturbs indicating circuit, V signal produces circuit and forms, human body crosslinking electrode wherein, the Frank correcting circuit, three preamplifiers, three storage circuits, driving amplifier is connected in series in proper order, the outfan of driving amplifier connects the input of Y-axis output circuit and X-axis output circuit respectively, the outfan input direct and the X-axis output circuit that V signal produces circuit joins, and the outfan of Y-axis output circuit and X-axis output circuit joins with monitor respectively; The outfan of three preamplifiers and electrocardio disturb indicating circuit to join, and the outfan of the outfan of function conversion circuit and condition indication circuit, three storage circuits and driving amplifier joins.The human body crosslinking electrode has 7 electrodes, promptly " I, E, C, A, M, F, N " respectively by a resistance directly and amplifier IC1～IC7 join.Between each two inputs of three preamplifiers, be connected to an analog switch " IC29, IC30, IC31 " respectively, the outfan of three preamplifiers respectively with three storage circuits in " A IN " end of IC35, IC36, IC37 join.The X-axis outfan in the driving amplifier and the outfan of Z axle are that the outfan of IC18, IC24 joins by the inverting input of analog switch " IC38, IC40 " with X-axis output circuit IC19 respectively, and Y-axis outfan and Z axle outfan are that the outfan of IC21, IC24 joins by the inverting input of analog switch IC41, IC43 and Y-axis output circuit IC22 respectively.The inverting input that V signal produces IC circuit 25 joins with analog switch IC44 by a resistance R 97, and the outfan that V signal produces IC circuit 25 joins by the in-phase input end of resistance R 62 with X-axis output circuit IC19.

Advantage of the present utility model is:

" vectorcardiogram " refers to reflect the three elements of electrocardio-activity: locus, amplitude of the vector, the open ring-type figure of simple curve relative time and N cardiac cycle ecg information of energy continuous record.Its method is to obtain the electrocardial vector that cardiac electrical activity produces by body surface contact electrode (7), and at the plane of structure (H face) of spatial spatial heart vector loop; " V " axis signal that adds synchronously the 50-200mm/ second that moves to right on the projection view information of face amount (F face) and sagittal plane (S face).By the correction of electronic technology, amplify, frequency conversion writes, read wait processing after, be plotted in through the twin shaft drawing pencil and form final graphics on the ordinary electrocardiogram.

Formed " X; Y; Z; V after superposition " time shifting " (V axle) information " the earth that contains much information of three axial vector figure that four-axis system constituted has improved, its graphic feature is that the time shaft of vectorcardiogram is to displaypattern, still mainly by " three of P.QRS.T ring constitutes figure cycles; but three rings are inc " open ring "; become the information that can trace N cardiac cycle continuously by the information of only tracing a cardiac cycle simultaneously; but vectorcardiogram has only three recording geometries that lead; this is more more convenient than Electrocardioscopy, and figure is more succinct.The record of N cardiac cycle can obtain the relation information of N cardiac cycle, conventional vectorcardiogram the atrioventricular conduction time that can not reflect, in the Q-T time limit, in the S-T time limit, T-P time limit and arrhythmia etc. are covered all at one glance.Because its figure is a projecting figure of vectorcardiographic loop, similar to the vectorcardiogram figure again again, its P.QRS.T ring launches, and the space vector track is clear, and direction vector is clear and definite, and the time vector location is accurate, so these advantages of vectorcardiogram also keep nothing left.Adopt number to handle and write the technology of reading, can easily the record frequency response of having only 50Hz of pen plotter be brought up to more than the 1000Hz, the misregistration of indoor conductive track will improve widely, reflect truer.

Four, description of drawings

Fig. 1 is a circuit structure block diagram of the present utility model.Human body crosslinking electrode 1, Frank correcting circuit 2, three preamplifiers 3, three storage circuits 4, driving amplifier 5, Y-axis output circuit 6, X-axis output circuit 7, monitor 8, function conversion circuit 9, condition indication circuit 10, electrocardios are wherein arranged and disturb indicating circuit 11, V signal to produce circuit 12.

Fig. 2 is an electrical schematic diagram of the present utility model.Fig. 3 is the left-half of Fig. 2, and Fig. 4 is the right half part of Fig. 2.

Five, the specific embodiment

Embodiment of the present utility model is as follows:

It is the operational amplifier of " LF353 " that operational amplifier IC1～IC28 all adopts model, the model that memory IC35～IC37 adopts is " ISD14DC ", it is the analog switch of CD4066 that IC29～IC34, IC48, IC49, IC41, IC43, IC44 adopt model, between each two inputs of three preamplifiers, be connected to an analog switch " IC29, IC30, IC31 " respectively, the outfan of three preamplifiers respectively with three storage circuits in " A IN " end of IC35, IC36, IC37 join.The X-axis outfan in the driving amplifier and the outfan of Z axle are that the outfan of IC18, IC24 joins by the inverting input of analog switch " IC38, IC40 " with X-axis output circuit IC19 respectively, and Y-axis outfan and Z axle outfan are that the outfan of IC21, IC24 joins by the inverting input of analog switch IC40, IC43 and Y-axis output circuit IC22 respectively.The inverting input that V signal produces IC circuit 25 joins with analog switch IC44 by a resistance R 97, and the outfan that V signal produces IC circuit 25 joins by the in-phase input end of resistance R 62 with X-axis output circuit IC19.

7 input electrode: I of human body, E, C, A, M, F, N according to the lead regulation of system of Fraik, is connected to seven positions of human body.The human ecg signal of introducing, through the follower that IC1-IC7 constitutes, finish the input impedance conversion after, deliver to the Fraik that constitutes by the R8-R18 correction system of leading, about proofreading and correct; About; " Wilson " central station is promptly set up in the skew of the joint of three the axial electrocardio gesture in front and back.The distance of proofreading and correct the different in size of three crossing cardiac electric axis and external electrode set-point and human heart electricity center does not simultaneously wait.Form simultaneously three mutually vertical, and intersect at the heart geometric center, up and down; About; Three the axial electrocardiosignaies in front and back.By IC8-IC10; IC11-IC13; Three difference amplifiers that IC14-IC16 constituted, respectively to about; About; Three the axial electrocardiosignaies in front and back are amplified.W1; W2; W3 is the amplification adjustment, W7; W8; W9 is the common mode rejection ratio adjustment, to guarantee the maximum inhibition to the human body common mode interference signal of input.IC29-IC31; IC31-IC34 is an analog switch, is subjected to be controlled by the sequential logic that IC54 constitutes, and when the former is closed, power shaft to the electrocardiosignal short circuit, when the latter is closed, is delivered to three axial ecg signal amplifiers with the voltage of fixing of 1MV.Adjust W10; W11; W12 is in order to calibrate final " vectorcardiogram " amplitude.Three axial electrocardiosignaies after amplifying are delivered to the analog input end AIN of digital memory, and IC15-IC17 is three single-chip digital storages, reading unit integrated circuit ISD1400, built-in AD; DA; RAM; CPU etc., XCLK end can be provided with read or write speed, and the double frequency clock oscillator that is subjected to be made of IC57-IC63 is controlled, and writing the fashionable frequency of clock at that time is 10MHz, and its clock frequency is 0.5MHz when reading.To guarantee mechanical type twin shaft shape that drawing pencil is drawn, can record truly originally up to the frequency response more than the 1000Hz.RECLED termination one light emitting diode is the record indication.Be subjected to the time sequential routine logic control, reading and writing control end REC; Carry out the operation that reads or writes when reaching PLAYL for low level.IC17-IC18; IC19;-IC20; IC21-IC22 is three axle driving amplifiers, and three axial electrocardiosignaies that acceptance storage, reading unit " are put " are slowly delivered to output circuit after the amplification.W4; W5; About W6 is respectively; About; Three the axial electrocardiosignal zero adjustment in front and back serve as zero to guarantee " Wilson " central station electromotive force.The output of XY graphic indicator also is zero.W10; W11; W12 is an axle gain adjustment, with guarantee input 1MV fix voltage the time, the XY graphic indicator produces the record amplitude of 10MW.The ramp voltage that the slope voltage generating circuit that is made of IC25 produces is delivered to by IC19, and with X axis signal superposition, make added on the electrocardiosignal of X-axis one with proportional example of time variable voltage signal relation, fixed slope, and be synchronized with three vectorcardiogram shape cycles, by by IC38; IC40; The axle combined changeover switch circuit that IC43 forms, in plane of structure vectorcardiogram and left and right sides cardiac electric axis to the signal superposition, the face amount vectorcardiogram also with left and right sides cardiac electric axis to the signal superposition, in sagittal plane vectorcardiogram and front and back cardiac electric axis to the signal superposition, three in " cross shaft surface " " the frontal axis face " " sagittal axial plane " that forms vectorcardiogram respectively is orthogonal, and include " vectorcardiogram " information of four four-dimension of " time shifting " information, trace continuously through the XY monitor again, and form the vectorcardiogram figure.IC68 constitutes the switch of tracing of pen plotter, and it is traced instruction and goes out the dual control of signal by the interference danger that IC26-IC28 forms.IC26-IC29 constitutes electrocardiosignal indication and interfering signal detecting circuit, its input forms to exchange with three preamplifier outfans and is connected, " R " to cardiac cycle is detected, through amplifying, promote the DG9 lumination of light emitting diode, as the electrocardio indication, and interfering signal is sent IC28 integration comparator after amplifying, R120 forms the relatively family of power and influence after the R122 dividing potential drop.When interfering signal reaches the amplitude of setting, DG10 is luminous as indication for comparator output " 1 " driven for emitting lights diode, send IC68 to stop to trace simultaneously, IC54, CD4017 decade computer constitute function conversion and work schedule instruction forming circuit, AN is an action button, by time a time, be transformed into next operating conditions from the work at present attitude again, its outfan Q0-Q7 carries out respectively and stops-observe-fix-deposit in-tracing vectorcardiogram-trace cross shaft surface vector

Electrocardiogram-trace frontal axis face vectorcardiogram-trace sagittal axial plane vectorcardiogram, eight work orders, the Q8 end is reset terminal, program is carried out finish the back with to initially stopping attitude.

DG1-DG8 is current execution content indication, and JLY is that the pen type of any model is directly retouched type XY monitor.

Claims

1. four-dimensional electrocardio display, by the signals collecting part, signal processing and segment signal output are formed, it is characterized in that this electrocardiograph is by human body crosslinking electrode (1), Frank correcting circuit (2), three preamplifiers (3), three storage circuits (4), driving amplifier (5), Y-axis output circuit (6), X-axis output circuit (7), monitor (8), function conversion circuit (9), condition indication circuit (10), electrocardio disturbs indicating circuit (11), V signal produces circuit (12) and forms, human body crosslinking electrode (1) wherein, Frank correcting circuit (2), three preamplifiers (3), three storage circuits (4), driving amplifier (5) order is connected in series, the outfan of driving amplifier (5) connects the input of Y-axis output circuit (6) and X-axis output circuit (7) respectively, the outfan input direct and X-axis output circuit (7) that V signal produces circuit (12) joins, and the outfan of Y-axis output circuit (6) and X-axis output circuit (7) joins with monitor (8) respectively; The outfan of three preamplifiers (3) and electrocardio disturb indicating circuit (11) to join, and the outfan of the outfan of function conversion circuit (9) and condition indication circuit (10), three storage circuits (4) and driving amplifier (5) joins.

2. four-dimensional electrocardio display according to claim 1 is characterized in that human body crosslinking electrode (1) has 7 electrodes, i.e. " I, E, C, A, M, F, N ", respectively by a resistance directly and amplifier IC1～IC7 join.

3. four-dimensional electrocardio display according to claim 1 and 2, it is characterized in that between each two inputs of three preamplifiers (3), being connected to an analog switch " IC29, IC30, IC31 " respectively, the outfan of three preamplifiers (3) respectively with three storage circuits (4) in " A IN " end of IC35, IC36, IC37 join.

4. four-dimensional electrocardio display according to claim 1 and 2, the outfan that it is characterized in that X-axis outfan in the driving amplifier (5) and Z axle is that the outfan of IC18, IC24 joins by the inverting input of analog switch " IC38, IC40 " with X-axis output circuit (7) IC19 respectively, and Y-axis outfan and Z axle outfan are that the outfan of IC21, IC24 joins by the inverting input of analog switch IC41, IC43 and Y-axis output circuit (7) IC22 respectively.

5. four-dimensional electrocardio display according to claim 1 and 2, the inverting input that it is characterized in that V signal generation circuit (12) IC25 joins with analog switch IC44 by a resistance R 97, and the outfan that V signal produces circuit (12) IC25 joins by the in-phase input end of resistance R 62 with X-axis output circuit (7) IC19.