CN105877740B - Rapid resetting method for electrocardiogram waveform baseline - Google Patents
Rapid resetting method for electrocardiogram waveform baseline Download PDFInfo
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- CN105877740B CN105877740B CN201610225113.0A CN201610225113A CN105877740B CN 105877740 B CN105877740 B CN 105877740B CN 201610225113 A CN201610225113 A CN 201610225113A CN 105877740 B CN105877740 B CN 105877740B
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- resistance
- wave form
- electric capacity
- ecg wave
- mux
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/24—Detecting, measuring or recording bioelectric or biomagnetic signals of the body or parts thereof
- A61B5/316—Modalities, i.e. specific diagnostic methods
- A61B5/318—Heart-related electrical modalities, e.g. electrocardiography [ECG]
Abstract
The invention provides a rapid resetting method for an electrocardiogram waveform baseline, which is applied to an electrocardiogram machine. The rapid resetting method is characterized by comprising the following steps: setting an RC high-pass circuit on each acquisition channel of an electrocardiogram signal, wherein the RC high-pass circuit comprises a resistor R1 and a capacitor C1, the capacitor C1 is provided with a first end connected with a front-grade circuit and a second end connected with a rear-grade circuit, the resistor R1 is connected between the second end and a ground end of the capacitor C1, a resistor R0 is arranged beside the resistor R1, the resistance value of the resistor R0 is smaller than that of the resistor R1, one end of the resistor R0 is connected with the second end of the capacitor C1, and the other end of the resistor R0 is connected with one channel pin of a multiplexer; when finding that the electrocardiogram waveform baseline is deviated and exceeds a pre-set threshold value, setting a control pin of the multiplexer as a high electric level by a processor, and enabling the resistor R0 to be grounded, thus rapidly discharging the capacitor C1 and rapidly resetting the electrocardiogram waveform baseline; after finding that the electrocardiogram waveform baseline is reset, setting the control pin of the multiplexer as a low electric level by the processor, and enabling the resistor R0 to be suspended.
Description
Technical field
The present invention relates to a kind of ecg wave form baseline Rapid reset method.
Background technology
Electrocardiograph is the physiological function detecting instrument for recording heart biology electrical activity waveform (i.e. electrocardiogram), it is possible to provide each
The essential information that heart disease is made a definite diagnosis and treated is planted, contributes to analyzing and recognizing all kinds of arrhythmia, diagnose various cardiovascular disease,
Help understands the pathology such as the impact of some drugses and electrolyte disturbance and acid base imbalance to cardiac muscle, therefore electrocardiograph is in heart
Disease has consequence in checking.During the use of electrocardiograph, the quickly output of patient's electrocardio report is extremely important,
Especially in large-scale health check-up, the quick output of electrocardio report can save patient's electrocardiographic examination time, improve and check efficiency,
The labor intensity of medical worker is reduced, patient's waiting time is reduced.The quick output of patient's electrocardio report, it is necessary first to Bing Renxin
The quick output of electrical waveform, and the Rapid reset and stability of patient's ecg wave form baseline are crucial.
In electrocardiogram acquisition circuit, in order to overcome the bias voltage of polarizing voltage, preposition amplifier, can be on each acquisition channel
RC high pass circuits generally are configured with, referring to accompanying drawing 1.The electric capacity and resistance of resistance low frequency are provided with RC high pass circuits.Due to the heart
The requirement of signal of telecommunication low frequency characteristic, time constant should be not less than 3.2s (referring to industry standard YY1139-2013), so electric capacity C
Value is generally 1uF, general values 3.9M of resistance R.When electric capacity C has charging, the quiescent direct current voltage of electric capacity is added to electrocardio
In signal, the ecg wave form baseline of pickup drifts about, because resistance R values are larger, electric capacity electric discharge is slow so that ecg wave form
Baseline is difficult Rapid reset to baseline.
In order to reach the purpose of ecg wave form baseline Rapid reset, existing electrocardiograph is typically using the side of software filtering
Method has：First, by opening software low frequency filtering, high-pass filtering frequency is improved so that ecg wave form baseline Rapid reset；2nd, lead to
Cross and open software ac filter (part function of the ac filter algorithm containing high pass) so that ecg wave form baseline Rapid reset.On
State and realize that the method for ecg wave form baseline Rapid reset has some defects and deficiency by opening software filtering：
(1) software low-pass filtering or ac filter are opened, ecg wave form Rapid reset is realized, while has also filtered off patient's heart
The low-frequency component of electricity, can cause patient's ecg wave form distortion, affect the diagnosis of doctor.
(2) because electric capacity still has charging, the DC voltage that electric capacity is produced is superimposed upon in ecg wave form, and rear class may be caused to put
Big circuit is operated in volume edges or goes beyond the scope.
(3) by opening software filtering, ecg wave form Rapid reset is realized, in order to avoid ecg wave form excessive distortion, the heart
Electrical waveform resets still not quick enough.
(4) by opening software filtering, ecg wave form Rapid reset is realized, it is impossible to meet electrocardiograph industry standard
YY1139-2013's requires low frequency characteristic (when product carries out low frequency characteristic detection, software filtering typically preserves closed mode).
The content of the invention
To overcome the prior art mentioned by background technology not enough, the Rapid reset of ecg wave form baseline is realized, the present invention
A kind of ecg wave form baseline Rapid reset method is proposed, its particular technique content is as follows：
The preferred version one of the present invention：
A kind of ecg wave form baseline Rapid reset method, is applied on electrocardiograph, it is characterised in that：
RC high pass circuits are respectively equipped with each acquisition channel of electrocardiosignal, the RC high pass circuits include resistance R1 and electricity
Hold C1, electric capacity C1 has the second end of the first end of connection front stage circuits and connection late-class circuit, and resistance R1 is connected to the electricity
Hold between the second end and the ground terminal of C1, the side of resistance R1 is provided with resistance R0, the resistance of resistance R0 is less than resistance R1, its
One end connects second end of electric capacity C1, on a passage pin of its other end connection MUX, the MUX
Ground connection or hanging operation are performed to each passage according to the signal of telecommunication of controlling switch；
The processor of electrocardiograph connects the MUX, its each passage EGC waveform data of collection and carry out it is right in real time
Than monitoring；
When finding that ecg wave form baseline deviation exceeds pre-set threshold value, processor is to by the controlling switch of the MUX
It is set to high level so that resistance R0 is grounded, total RC time constants decline, electric capacity C1 is able to repid discharge, makes ecg wave form baseline
Rapid reset；
After finding that ecg wave form baseline resets, processor is set to low level to the controlling switch of MUX immediately,
So that resistance R0 is hanging.
In the middle of one or more embodiments of the invention, the capacitance of electric capacity C1 is 1 microfarad, and the resistance of resistance R1 is
3.9M ohms, the resistance of resistance R0 is 390K ohms.
The preferred version two of the present invention：
A kind of ecg wave form baseline Rapid reset method, is applied on electrocardiograph, it is characterised in that：
RC high pass circuits are respectively equipped with each acquisition channel of electrocardiosignal, the RC high pass circuits include resistance R1 and electricity
Hold C1, electric capacity C1 has the second end of the first end of connection front stage circuits and connection late-class circuit, and resistance R1 is connected to the electricity
Hold between the second end and the ground terminal of C1, the side of resistance R1 is provided with little valued resistor R0, the resistance of resistance R0 is less than electricity
Resistance R1, its one end connects second end of electric capacity C1, on a passage pin of its other end connection MUX, multichannel choosing
Select device and ground connection or hanging operation are performed to each passage according to the signal of telecommunication of controlling switch；
The processor of electrocardiograph connects the MUX, and is provided with a reset key for supplying user operation；
When user has found that ecg wave form baseline deviation is larger, reset key, the processor response of electrocardiograph are persistently pressed
And the controlling switch of the MUX is set to into high level so that resistance R0 is grounded, and total RC time constants decline, and electric capacity C1 is obtained
With repid discharge, ecg wave form baseline Rapid reset is made；
After user has found that ecg wave form baseline completes to reset, reset key is unclamped, processor is immediately to MUX
Controlling switch is set to low level so that resistance R0 is hanging.
In the middle of one or more embodiments of the invention, the capacitance of electric capacity C1 is 1 microfarad, and the resistance of resistance R1 is
3.9M ohms, the resistance of resistance R0 is 390K ohms.
Compared with prior art, its advantageous exists for this discovery：Weight based on patient's ecg wave form baseline Rapid reset
The property wanted, for software mode the deficiency that ecg wave form baseline resets is realized, by ecg wave form baseline real-time monitoring, software is automatic
Or manually control, multi-path choice, the technical method such as double hardware high pass frequency filterings realizes baseline Rapid reset.In electrocardiograph
On, when the pickup of patient's ecg wave form is carried out, ecg wave form baseline deviation is detected, immediately by software control, improve hardware
High-pass filtering frequency, makes baseline Rapid reset, Fast Restoration hardware high pass frequency filtering after reset, allows machine to enter recordable shape
State, in the case where patient's ecg wave form primitiveness is ensured, realizes patient's ecg wave form baseline Rapid reset, so as to quick obtaining
Patient's electrocardio is reported.
Description of the drawings
Fig. 1 is the RC high pass circuit structure charts in the middle of prior art on each electrocardiogram acquisition passage.
Fig. 2 is the RC high pass circuit structure charts that the present invention placed R0 resistance and MUX.
Specific embodiment
Below in conjunction with accompanying drawing, application scheme is further described：
Referring to accompanying drawing 2, embodiments of the invention one：
A kind of ecg wave form baseline Rapid reset method, is applied on electrocardiograph, in each acquisition channel of electrocardiosignal
On be respectively equipped with RC high pass circuits, the RC high pass circuits include resistance R1 and electric capacity C1, electric capacity C1 have connection front stage circuits
First end and connection late-class circuit the second end, resistance R1 is connected between second end of electric capacity C1 and ground terminal, in resistance
The side of R1 is provided with resistance R0, and the resistance of resistance R0 is less than resistance R1, and its one end connects second end of electric capacity C1, and its is another
On one passage pin of one end connection MUX, the MUX is held according to the signal of telecommunication of controlling switch to each passage
Row ground connection or hanging operation；The capacitance of electric capacity C1 is 1 microfarad, and the resistance of resistance R1 is 3.9M ohms, the resistance of resistance R0
It is worth for 390K ohms.
By taking triple channel electrocardiograph as an example, the resistance R0 of each acquisition channel is connected respectively to MUX CD4053
X1, Y1 and Z1 foot, X, Y, Z foot ground connection of MUX CD4053, control foot A, B, C foot of MUX CD4053 connects
The GP IO feet of processor are connected to, MUX CD4053 is controlled by processor.
The each cardiac diagnosis lead electrode of patient is connected, processor gathers each passage EGC waveform data and carries out real time contrast's prison
Survey；When finding that ecg wave form baseline deviation exceeds pre-set threshold value (for example, more than 0.5mV), processor is to by the multi-path choice
Controlling switch A, B of device CD4053, C feet are set to high level so that the resistance R0 ground connection of each acquisition channel, under total RC time constants
Drop (T about 0.4 second), electric capacity C1 is able to repid discharge, makes ecg wave form baseline Rapid reset (resetting time is less than 2 seconds)；When send out
After existing ecg wave form baseline resets, processor controlling switch A, B immediately to MUX, C feet are set to low level so that electricity
Resistance R0 is hanging, and total RC time constants are recovered to conventional value.
Especially, when the reset of ecg wave form baseline is carried out, processor suspends the record of ecg wave form；Operate when resetting
Cheng Hou, processor recovers again ecg wave form recording status, and user presses writing function button and starts ecg wave form record, exports patient
Electrocardio is reported.
Embodiments of the invention two：
It is that ecg wave form baseline resets control by user's manual operation, electrocardiogram with the difference of above-described embodiment one
The processor of machine connects MUX CD4053, and is provided with a reset key for supplying user operation；When user has found electrocardio
When waveform baseline deviates larger, reset key is persistently pressed, the processor response of electrocardiograph and by the control of the MUX
Pin is set to high level so that resistance R0 is grounded, and total RC time constants decline, and electric capacity C1 is able to repid discharge, makes ecg wave form
Baseline Rapid reset；After user has found that ecg wave form baseline completes to reset, reset key is unclamped, processor is immediately to multi-path choice
The controlling switch of device is set to low level so that resistance R0 is hanging.
By the method for the present invention, ecg wave form baseline Rapid reset is capable of achieving, resetting time is less than 2s.Due to replying immediately soon
Position occurred before electrocardiographic recording, and time constant has recovered normal during electrocardiographic recording, so ecg wave form distortion will not be caused, protected
The primitiveness of electrocardiosignal is demonstrate,proved.Also just because when ecg wave form is recorded, baseline has resetted, rear class will not be caused to amplify electricity
Road is operated in volume edges or goes beyond the scope so that amplifying circuit is operated in optimum range, advantageously ensures that the complete of electrocardiosignal
Whole property and verity.
Above-mentioned preferred implementation should be regarded as the illustration of application scheme embodiment, all and application scheme thunder
Technology deduction that is same, approximately or based on this making, replacement, improvement etc., are regarded as the protection domain of this patent.
Claims (4)
1. a kind of ecg wave form baseline Rapid reset method, is applied on electrocardiograph, it is characterised in that：
RC high pass circuits are respectively equipped with each acquisition channel of electrocardiosignal, the RC high pass circuits include resistance R1 and electric capacity
C1, electric capacity C1 have the second end of the first end of connection front stage circuits and connection late-class circuit, and resistance R1 is connected to the electric capacity
Between second end of C1 and ground terminal, the side of resistance R1 is provided with resistance R0, the resistance of resistance R0 is less than resistance R1, one
Second end of end connection electric capacity C1, on a passage pin of its other end connection MUX, the MUX root
Ground connection or hanging operation are performed to each passage according to the signal of telecommunication of controlling switch；
The processor of electrocardiograph connects the MUX, and its each passage EGC waveform data of collection simultaneously carries out real time contrast's prison
Survey；
When finding that ecg wave form baseline deviation exceeds pre-set threshold value, processor is to the controlling switch of the MUX is set to
High level so that resistance R0 is grounded, total RC time constants decline, and electric capacity C1 is able to repid discharge, makes ecg wave form baseline quick
Reset；
After finding that ecg wave form baseline resets, processor is set to low level to the controlling switch of MUX immediately so that
Resistance R0 is hanging.
2. ecg wave form baseline Rapid reset method according to claim 1, it is characterised in that：The capacitance of electric capacity C1 is
1 microfarad, the resistance of resistance R1 is 3.9M ohms, and the resistance of resistance R0 is 390K ohms.
3. a kind of ecg wave form baseline Rapid reset method, is applied on electrocardiograph, it is characterised in that：
RC high pass circuits are respectively equipped with each acquisition channel of electrocardiosignal, the RC high pass circuits include resistance R1 and electric capacity
C1, electric capacity C1 have the second end of the first end of connection front stage circuits and connection late-class circuit, and resistance R1 is connected to the electric capacity
Between second end of C1 and ground terminal, the side of resistance R1 is provided with little valued resistor R0, the resistance of resistance R0 is less than resistance
R1, its one end connects second end of electric capacity C1, on a passage pin of its other end connection MUX, multi-path choice
Device performs ground connection or hanging operation to each passage according to the signal of telecommunication of controlling switch；
The processor of electrocardiograph connects the MUX, and is provided with a reset key for supplying user operation；
When user has found that ecg wave form baseline deviation is larger, reset key is persistently pressed, the processor response of electrocardiograph simultaneously will
The controlling switch of the MUX is set to high level so that resistance R0 is grounded, and total RC time constants decline, and electric capacity C1 is able to soon
Speed electric discharge, makes ecg wave form baseline Rapid reset；
After user has found that ecg wave form baseline completes to reset, reset key is unclamped, processor is immediately to the control of MUX
Pin is set to low level so that resistance R0 is hanging.
4. ecg wave form baseline Rapid reset method according to claim 3, it is characterised in that：The capacitance of electric capacity C1 is
1 microfarad, the resistance of resistance R1 is 3.9M ohms, and the resistance of resistance R0 is 390K ohms.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610225113.0A CN105877740B (en) | 2016-04-12 | 2016-04-12 | Rapid resetting method for electrocardiogram waveform baseline |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610225113.0A CN105877740B (en) | 2016-04-12 | 2016-04-12 | Rapid resetting method for electrocardiogram waveform baseline |
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| CN105877740A CN105877740A (en) | 2016-08-24 |
| CN105877740B true CN105877740B (en) | 2017-05-17 |
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Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN2394572Y (en) * | 1999-09-22 | 2000-09-06 | 珠海经济特区中立电子工程有限公司 | Standard 12 conductive lead electrocardiosignal collector matched with portable electrocardiogram monitor |
| CN100337583C (en) * | 2004-07-26 | 2007-09-19 | 深圳迈瑞生物医疗电子股份有限公司 | Method and circuit for measuring of inhibiting electrocardiac waveforms by suppressing pace make pulse |
| JP2006061494A (en) * | 2004-08-27 | 2006-03-09 | Omron Healthcare Co Ltd | Portable type electrocardiograph |
| CN201542630U (en) * | 2009-11-13 | 2010-08-11 | 青岛盘古电气有限公司 | Novel electrocardio-recorder |
| US20160278655A1 (en) * | 2013-11-08 | 2016-09-29 | Koninklijke Philips N.V. | Ecg high pass filter |
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