CN108785049A - A kind of measuring device of external chest compression frequency - Google Patents
A kind of measuring device of external chest compression frequency Download PDFInfo
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- CN108785049A CN108785049A CN201810343287.6A CN201810343287A CN108785049A CN 108785049 A CN108785049 A CN 108785049A CN 201810343287 A CN201810343287 A CN 201810343287A CN 108785049 A CN108785049 A CN 108785049A
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61H—PHYSICAL THERAPY APPARATUS, e.g. DEVICES FOR LOCATING OR STIMULATING REFLEX POINTS IN THE BODY; ARTIFICIAL RESPIRATION; MASSAGE; BATHING DEVICES FOR SPECIAL THERAPEUTIC OR HYGIENIC PURPOSES OR SPECIFIC PARTS OF THE BODY
- A61H31/00—Artificial respiration or heart stimulation, e.g. heart massage
- A61H31/004—Heart stimulation
- A61H31/005—Heart stimulation with feedback for the user
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61H—PHYSICAL THERAPY APPARATUS, e.g. DEVICES FOR LOCATING OR STIMULATING REFLEX POINTS IN THE BODY; ARTIFICIAL RESPIRATION; MASSAGE; BATHING DEVICES FOR SPECIAL THERAPEUTIC OR HYGIENIC PURPOSES OR SPECIFIC PARTS OF THE BODY
- A61H2205/00—Devices for specific parts of the body
- A61H2205/08—Trunk
- A61H2205/084—Chest
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- Physical Education & Sports Medicine (AREA)
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Abstract
The invention discloses a kind of measuring devices of external chest compression frequency, including：Display；For real-time sampling patient electrocardiosignal and obtain the electrocardio sample circuit of sample sequence；The controller that input terminal is connect with the output end of electrocardio sample circuit, output end and display connect, for when detecting that patient is carrying out external chest compression according to sample sequence, compression frequency sequence is obtained according to the corresponding sample sequence of external chest compression, and it outputs this to display and shows, in order to which the person of pressing judges whether compression frequency at this time meets CPR requirement, if not meeting, compression frequency is adjusted in time to prescribed limit.As it can be seen that pressing person during carrying out external chest compression to patient, can refer to the compression frequency sequence obtained and adjust the compression frequency of itself, more accurate to be held to compression frequency, the effect of CPR is preferable, improves the survival rate of patient.
Description
Technical field
The present invention relates to medical electronics message areas, more particularly to a kind of measuring device of external chest compression frequency.
Background technology
Currently, scientific studies have shown that, sudden arrest of heart beat refers to the unexpected forfeiture of heart function, to the patient Ying Li of sudden arrest of heart beat
CPR is carried out to improve the survival rate of patient.And external chest compression is one of the necessary means in CPR, is pressed outside chest
The compression frequency of pressure will have a direct impact on the effect of CPR.If during carrying out external chest compression to patient, to pressing
Frequency assurance is not accurate enough, can not only influence the effect of CPR, or even can be caused serious injury to patient.As it can be seen that
It is of great significance in the assessment of external chest compression effect, measuring compression frequency.
Therefore, how to provide it is a kind of solve above-mentioned technical problem scheme be that those skilled in the art needs to solve at present
The problem of.
Invention content
The object of the present invention is to provide a kind of measuring device of external chest compression frequency, pressing person to patient press outside chest
During pressure, the compression frequency sequence obtained can be referred to and adjust the compression frequency of itself, to be held to compression frequency
Relatively accurate, the effect of CPR is preferable, improves the survival rate of patient.
In order to solve the above technical problems, the present invention provides a kind of measuring devices of external chest compression frequency, including：
Display；
For real-time sampling patient electrocardiosignal and obtain the electrocardio sample circuit of sample sequence；
Input terminal connect with the output end of the electrocardio sample circuit, the controller that output end is connect with the display,
It is corresponding according to the external chest compression for when detecting that the patient is carrying out external chest compression according to the sample sequence
Sample sequence obtains compression frequency sequence, and outputs this to the display and show.
Preferably, which further includes：
The voice prompting device being connect with the control terminal of the controller；The controller is additionally operable to according to current press frequency
With the comparative situation of preset standard compression frequency range, controls the voice prompting device and make the prompt of corresponding pressing speed.
Preferably, the electrocardio sample circuit includes the first electrocardio electrode plate, the use for real-time sampling left lower extremity voltage
The second electrocardio electrode plate in real-time sampling right upper extremity voltage, the left lower extremity voltage for limited samples are in predetermined safe range
The first signal buffer circuit, second signal buffer circuit of the right upper extremity voltage in the safe range for limited samples
And differential amplifier circuit, wherein：
First electrocardio electrode plate is connect by conducting wire with the input terminal of the first signal buffer circuit, and described
The output end of one signal buffer circuit is connect with the first input end of the differential amplifier circuit, and second electrocardio electrode plate is logical
Conducting wire is crossed to connect with the input terminal of the second signal buffer circuit, the output end of the second signal buffer circuit with it is described
Second input terminal of differential amplifier circuit connects, and the output end of the differential amplifier circuit is as the defeated of the electrocardio sample circuit
Outlet；
The differential amplifier circuit is used to make difference in real time to the left lower extremity voltage and the right upper extremity voltage, obtains described
Sample sequence.
Preferably, the first signal buffer circuit and second signal buffer circuit include gas-discharge tube GDT, it is passive
Low-pass filter circuit, positive supply, the first diode, negative supply and the second diode, wherein：
The first end of the GDT is connect with the input terminal of the passive low-pass filter circuit, and common end mutually should be used as institute
State the input terminal of the first signal buffer circuit and second signal buffer circuit, the second end ground connection of the GDT, the passive low pass
The output end of filter circuit is connect with the anode of the cathode of first diode and second diode respectively, common end
Mutually should be used as the output end of the first signal buffer circuit and second signal buffer circuit, the anode of first diode with
The negative supply connection, the cathode of second diode are connect with the positive supply.
Preferably, the electrocardio sample circuit further includes：
Input terminal connect with the output end of the differential amplifier circuit, output of the output end as the electrocardio sample circuit
End, the signal filter circuit for being filtered to the sample sequence.
Preferably, which further includes：
It is connect with the output end of the controller, for supervising the center of the compression frequency sequence real-time Transmission to hospital
The data transmission module at control center.
Preferably, the data transmission module is specially wireless transport module.
Preferably, which further includes：
It is connect with the output end of the controller, the memory for storing the compression frequency sequence.
Preferably, the controller includes：
Sampling filter module, for when detecting that the patient is carrying out external chest compression according to the sample sequence,
By the medium filtering again of each sampled signal elder generation low-pass filtering in the corresponding sample sequence of the external chest compression；
Frequency seeks module, for being determined between adjacent minimum point or maximum point from filtered sample sequence
Time interval；Successively divided by the time interval obtains compression frequency sequence by electrocardio sample frequency, and institute is output this to
Display is stated to show.
Preferably, the controller further includes：
Extreme value determining module, for determined from filtered sample sequence adjacent minimum point or maximum point it
Between time interval before, determine maximum point and minimum point successively from filtered sample sequence, however, it is determined that it is adjacent
Two point pnAnd pn+1Between time interval in preset time range, ordinate difference be more than default adaptive threshold h, then
Determine pnAnd pn+1For extreme point caused by the external chest compression；Wherein, h=k Δs yn-1, 0 k≤1 <, Δ yn-1It is last true
The ordinate difference of two fixed extreme points.
The present invention provides a kind of measuring devices of external chest compression frequency, including：Display；For real-time sampling patient's
Electrocardiosignal and the electrocardio sample circuit for obtaining sample sequence；Input terminal connect with the output end of electrocardio sample circuit, output end
The controller being connect with display, for when detecting that patient is carrying out external chest compression according to sample sequence, according to outside chest
It presses corresponding sample sequence and obtains compression frequency sequence, and output this to display and show.
The application is by the electrocardiosignal of electrocardio sample circuit real-time sampling patient and obtains sample sequence, then by controlling
Device detects whether patient is carrying out external chest compression according to sample sequence, if detecting, patient is carrying out external chest compression, according to
The corresponding sample sequence of external chest compression obtains compression frequency sequence, and exports to display and show, in order to which the person of pressing judges this
When compression frequency whether meet CPR requirement, if not meeting, adjust compression frequency in time to prescribed limit.As it can be seen that pressing
Pressure person to patient carry out external chest compression during, can refer to obtain compression frequency sequence and adjust itself by voltage-frequency
Rate, more accurate to be held to compression frequency, the effect of CPR is preferable, improves the survival rate of patient.
Description of the drawings
It to describe the technical solutions in the embodiments of the present invention more clearly, below will be to institute in the prior art and embodiment
Attached drawing to be used is needed to be briefly described, it should be apparent that, the accompanying drawings in the following description is only some implementations of the present invention
Example, for those of ordinary skill in the art, without creative efforts, can also obtain according to these attached drawings
Obtain other attached drawings.
Fig. 1 is a kind of structural schematic diagram of the measuring device of external chest compression frequency provided by the invention；
Fig. 2 is a kind of structural schematic diagram of differential amplifier circuit provided by the invention；
Fig. 3 is a kind of structural schematic diagram of signal buffer circuit provided by the invention.
Specific implementation mode
Core of the invention is to provide a kind of measuring device of external chest compression frequency, and pressing person to patient press outside chest
During pressure, the compression frequency sequence obtained can be referred to and adjust the compression frequency of itself, to be held to compression frequency
Relatively accurate, the effect of CPR is preferable, improves the survival rate of patient.
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is
A part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art
The every other embodiment obtained without making creative work, shall fall within the protection scope of the present invention.
Fig. 1 is please referred to, Fig. 1 is a kind of structural schematic diagram of the measuring device of external chest compression frequency provided by the invention.It should
Measuring device includes：
Display 1；
For real-time sampling patient electrocardiosignal and obtain the electrocardio sample circuit 2 of sample sequence；
The controller 3 that input terminal is connect with the output end of electrocardio sample circuit 2, output end and display 1 connect, for working as
When detecting that patient is carrying out external chest compression according to sample sequence, is obtained according to the corresponding sample sequence of external chest compression and press voltage-frequency
Rate sequence, and output this to the display of display 1.
It should be noted that default in the application sets in advance, unless need to change according to actual conditions, it is no
It need not then reset.
Specifically, sudden arrest of heart beat is a kind of serious disease, if patient cannot rescue in time, meeting after 4 to 6 minutes
Irreversible injury is caused to the brain of patient and other people body organs in adult.Scientific research is it has been shown that rapid to heartbeat
Stop patient and carry out CPR immediately that the survival rate of patient can be effectively improved.External chest compression is highly important in CPR
One link, the external chest compression frequency recommended in international cardiopulmonary resuscitation guide are 100 to 120 times per minute.
Based on this, this application provides a kind of measuring devices of external chest compression frequency, including electrocardio sample circuit 2, control
Device 3 and display 1.First, the electrocardiosignal of patient is adopted under the electrocardio sample frequency of setting by electrocardio sample circuit 2
Sample obtains sample sequence, and it is sent to controller 3 in real time.The controller 3 of the application can detect sample sequence in real time,
When detect patient occur cardiac arrest when, alarm can be controlled and send out alarm, with remind salvor immediately to patient into
Row external chest compression.
Controller 3 still detects sample sequence, when detecting that patient is carrying out external chest compression, is corresponded to according to external chest compression
Sample sequence obtain compression frequency sequence, and compression frequency sequence is exported to display 1 and is shown, in order to current pressing
Person understands the compression frequency of itself, if finding the compression frequency of itself pressing standard against regulation, adjusts itself in time
Compression frequency, to compression frequency hold it is more accurate, the effect of CPR is preferable, improves the survival rate of patient.
The present invention provides a kind of measuring devices of external chest compression frequency, including：Display；For real-time sampling patient's
Electrocardiosignal and the electrocardio sample circuit for obtaining sample sequence；Input terminal connect with the output end of electrocardio sample circuit, output end
The controller being connect with display, for when detecting that patient is carrying out external chest compression according to sample sequence, according to outside chest
It presses corresponding sample sequence and obtains compression frequency sequence, and output this to display and show.
The application is by the electrocardiosignal of electrocardio sample circuit real-time sampling patient and obtains sample sequence, then by controlling
Device detects whether patient is carrying out external chest compression according to sample sequence, if detecting, patient is carrying out external chest compression, according to
The corresponding sample sequence of external chest compression obtains compression frequency sequence, and exports to display and show, in order to which the person of pressing judges this
When compression frequency whether meet CPR requirement, if not meeting, adjust compression frequency in time to prescribed limit.As it can be seen that pressing
Pressure person to patient carry out external chest compression during, can refer to obtain compression frequency sequence and adjust itself by voltage-frequency
Rate, more accurate to be held to compression frequency, the effect of CPR is preferable, improves the survival rate of patient.
On the basis of the above embodiments：
As a kind of preferred embodiment, which further includes：
The voice prompting device being connect with the control terminal of controller 3；Controller 3 is additionally operable to according to current press frequency and presets
The comparative situation of standard compression frequency range, control voice prompting device make the prompt of corresponding pressing speed.
Specifically, the application further includes the voice prompting device controlled by controller 3.Controller 3 presses the current of pressing person
Voltage-frequency rate is made comparisons with the standard compression frequency range of setting, when current press frequency is within the scope of standard compression frequency, is said
Bright pressing complies with standard, then control voice prompting device prompt pressing complies with standard；When current press frequency is above standard by voltage-frequency
When the upper limit of rate range, illustrate to press it is too fast, then control voice prompting device prompt pressing it is too fast；When current press frequency is less than mark
When the lower limit of quasi- compression frequency range, illustrate that then the prompt of control voice prompting device is slow by pressing through by pressing through slowly.As it can be seen that pressing person
The compression frequency of itself can be adjusted in time by the prompt of voice prompting device, judge adjustment without itself, improve pressing person
Pressing effect.
As a kind of preferred embodiment, electrocardio sample circuit 2 includes first heart for real-time sampling left lower extremity voltage
Electric electrode slice, the second electrocardio electrode plate for real-time sampling right upper extremity voltage, the left lower extremity voltage for limited samples are pre-
If the first signal buffer circuit in safe range, second signal of the right upper extremity voltage in safe range for limited samples
Buffer circuit and differential amplifier circuit, wherein：
First electrocardio electrode plate is connect by conducting wire with the input terminal of the first signal buffer circuit, the first signal buffer electricity
The output end on road and the first input end of differential amplifier circuit connect, and the second electrocardio electrode plate is slow by conducting wire and second signal
The input terminal connection of circuit is rushed, the output end of second signal buffer circuit and the second input terminal of differential amplifier circuit connect, poor
Divide output end of the output end of amplifying circuit as electrocardio sample circuit 2；
Differential amplifier circuit is used to make difference in real time to left lower extremity voltage and right upper extremity voltage, obtains sample sequence.
Specifically, the electrocardio sample circuit 2 in the application includes the first electrocardio electrode plate, the second electrocardio electrode plate, first
Signal buffer circuit, second signal buffer circuit and differential amplifier circuit.First electrocardio electrode plate is used for real-time sampling patient's
Left lower extremity voltage, the second electrocardio electrode plate are used for the right upper extremity voltage of the real-time sampling patient.
In view of that there may be the strong electric pulse for being applied to patient when electrostatic and electric defibrillation with patient, lead to sampling
The voltage value of left lower extremity voltage and right upper extremity voltage is excessive, to damage late-class circuit, so the application is in the first electrocardioelectrode
The first signal buffer circuit is arranged in the output end of piece, is used for safe voltage range of the left lower extremity voltage in setting of limited samples
It is interior.Second signal buffer circuit equally is set in the output end of the second electrocardio electrode plate, is used for the right upper extremity voltage of limited samples
Within the scope of safe voltage, late-class circuit is protected.
Then, differential amplifier circuit puts the left lower extremity voltage after buffering with the right upper extremity voltage progress difference after buffering
Greatly, since the difference of left lower extremity voltage and right upper extremity voltage can be used as the electrocardiosignal of patient, so electrocardio sample circuit 2 is real
The sampling of existing patient's electrocardiosignal, to obtain sample sequence.
Fig. 2 is please referred to, Fig. 2 is a kind of structural schematic diagram of differential amplifier circuit provided by the invention.In Fig. 2, in difference
Under the conditions of amplifying circuit is symmetrical, differential amplifier circuit has very strong inhibition null offset and inhibits the energy of noise and interference
Power.
Fig. 3 is please referred to, Fig. 3 is a kind of structural schematic diagram of signal buffer circuit provided by the invention.
As a kind of preferred embodiment, the first signal buffer circuit and second signal buffer circuit include gas discharge
Pipe GDT, passive low-pass filter circuit LPF1, positive supply, the first diode D1, negative supply and the second diode D2, wherein：
The first end of GDT is connect with the input terminal of passive low-pass filter circuit LPF1, and common end mutually should be used as the first letter
The input terminal of number buffer circuit and second signal buffer circuit, the second end ground connection of GDT, passive low-pass filter circuit LPF1's is defeated
Outlet is connect with the anode of the cathode of the first diode D1 and the second diode D2 respectively, and common end mutually should be used as the first signal
The anode of the output end of buffer circuit and second signal buffer circuit, the first diode D1 is connect with negative supply, the second diode
The cathode of D2 is connect with positive supply.
Specifically, the first signal buffer circuit and second signal buffer circuit include GDT (gas in the application
Discharge tube, gas-discharge tube), passive low-pass filter circuit LPF1, positive supply, the first diode D1, negative supply and
Second diode D2.
Wherein, GDT has the function of release momentary excess current and over-voltage, to protect late-class circuit from defibrillation
The influence of electrode；Passive low-pass filter circuit LPF1 can improve signal-to-noise ratio and the input impedance of electrocardiosignal, in the application
Passive low-pass filter circuit LPF1 is made of resistance R1 and capacitance C1, as shown in Figure 3；First diode D1 and the second diode D2
Amplitude limiter circuit is formed, it, can will be defeated when voltage when the input voltage of the two is higher than the voltage of positive supply or less than negative supply
Enter voltage and remain safety value, avoids damage late-class circuit.
The the first signal buffer circuit and second signal buffer circuit of the application can also be added in the rear class of amplitude limiter circuit
Another passive low-pass filter circuit LPF2, current-limiting resistance R and amplifier U.Wherein, another passive low-pass filter circuit LPF2 is into one
Step improves signal-to-noise ratio and the input impedance of electrocardiosignal；Current-limiting resistance R limits the input current of late-class circuit, protects
Late-class circuit；Amplifier U further increases input impedance.
As a kind of preferred embodiment, electrocardio sample circuit 2 further includes：
The connection of the output end of input terminal and differential amplifier circuit, output end of the output end as electrocardio sample circuit 2, are used for
The signal filter circuit that sample sequence is filtered.
Further, it is contemplated that there may be interference signals for the sample sequence of differential amplifier circuit output, and the application is in difference
Divide the rear class of amplifying circuit that signal filter circuit is added, plays the role of filtering interference signals so that the pressing that controller 3 obtains
Frequency sequence more has reference value.
As a kind of preferred embodiment, which further includes：
It is connect with the output end of controller 3, for by the central monitoring center of compression frequency sequence real-time Transmission to hospital
Data transmission module.
Further, the application can also include data transmission module, be used for compression frequency sequence real-time Transmission to doctor
The central monitoring center of institute, in order to which central monitoring center manages compression frequency sequence concentratedly.In addition, data transmission mould
Block can also come hospital the central monitoring center of the data transmission of other during external chest compression to hospital, these data
It says it is most valuable, there is good reference value.
As a kind of preferred embodiment, data transmission module is specially wireless transport module.
Specifically, wireless transmission method, such as WIFI module, the application may be used in the data transmission module in the application
It is not particularly limited herein.
As a kind of preferred embodiment, which further includes：
It is connect with the output end of controller 3, the memory for storing compression frequency sequence.
Further, the application can also include memory, for storing compression frequency sequence, can also be used to storage chest
Other data during outer pressing study external chest compression for the later stage and make reference data.Here memory can be but not only
It is limited to the portable memory card that capacity is big, small.
As a kind of preferred embodiment, controller 3 includes：
Sampling filter module, for when detecting that patient is carrying out external chest compression according to sample sequence, will be pressed outside chest
Press each sampled signal elder generation low-pass filtering in corresponding sample sequence medium filtering again；
Frequency seeks module, for being determined between adjacent minimum point or maximum point from filtered sample sequence
Time interval；Successively divided by time interval obtains compression frequency sequence by electrocardio sample frequency, and display 1 is output this to
Display.
Specifically, the detailed process that controller 3 obtains compression frequency sequence includes：By the sampling filter module of controller 3
By each sampled signal elder generation low-pass filtering in the corresponding sample sequence of external chest compression, low-pass filtering is a kind of filter type, rule
Can be normal through for the low frequency signal no more than setting critical value, and the high-frequency signal more than setting critical value is then blocked, subtracts
Weak, cutoff frequency, which is arranged, in the application can be but be not limited only to 3Hz.Sampling filter module again by each sampled signal medium filtering,
Medium filtering is a kind of nonlinear signal processing technology that can effectively inhibit noise based on sequencing statistical theory, and medium filtering exists
While filtering out noise, it is capable of the edge of protection signal, is allowed to not be blurred, and the algorithm comparison of medium filtering is simple, is easy to
Use hardware realization.Then, module is sought by the frequency of controller 3 and determines adjacent minimum point from filtered sample sequence
Between abscissa difference, i.e. time interval；Then successively divided by time interval obtains compression frequency sequence by electrocardio sample frequency
Row.Alternatively, from determining the time interval between adjacent maximum point to obtain compression frequency sequence in filtered sample sequence
Row.
As a kind of preferred embodiment, controller 3 further includes：
Extreme value determining module, for determined from filtered sample sequence adjacent minimum point or maximum point it
Between time interval before, determine maximum point and minimum point successively from filtered sample sequence, however, it is determined that it is adjacent
Two point pnAnd pn+1Between time interval in preset time range, ordinate difference be more than default adaptive threshold h, then
Determine pnAnd pn+1For extreme point caused by external chest compression；Wherein, h=k Δs yn-1, 0 k≤1 <, Δ yn-1It is determined for the last time
The ordinate difference of two extreme points.
Further, it is contemplated that the extreme point in sample sequence may not be that external chest compression causes, the pressing caused
Frequency sequence is wrong, so, the application determined from filtered sample sequence adjacent minimum point or maximum point it
Between time interval before, by the extreme value determining module of controller 3 from filtered sample sequence successively determine maximum point
And minimum point, as determining two adjacent point pnAnd pn+1Between time interval in the time range of setting, and 2 points
When ordinate difference is more than the adaptive threshold of setting, illustrate pnAnd pn+1For extreme point caused by external chest compression, subsequently according to chest
Time interval in extreme point caused by outer pressing between adjacent maximum point or minimum point, obtains compression frequency sequence,
To improve the accuracy and reliability that obtain compression frequency sequence.
The application is additionally contemplates that the dynamics that pressing person presses every time generally will not be identical, causes between adjacent 2 points
Ordinate difference will not remain unchanged, so adaptive threshold here could be provided as：H=k Δs yn-1, wherein 0 < k≤
1, k can choose but be not limited only to 0.7, Δ yn-1For the ordinate difference for two extreme points that the last time determines.That is, pressing
Although the dynamics of pressure is different, but as long as in reasonable range, it is regarded as effectively pressing.
It should also be noted that, in the present specification, relational terms such as first and second and the like be used merely to by
One entity or operation are distinguished with another entity or operation, without necessarily requiring or implying these entities or operation
Between there are any actual relationship or orders.Moreover, the terms "include", "comprise" or its any other variant meaning
Covering non-exclusive inclusion, so that the process, method, article or equipment including a series of elements includes not only that
A little elements, but also include other elements that are not explicitly listed, or further include for this process, method, article or
The intrinsic element of equipment.In the absence of more restrictions, the element limited by sentence "including a ...", is not arranged
Except there is also other identical elements in the process, method, article or apparatus that includes the element.
The foregoing description of the disclosed embodiments enables those skilled in the art to implement or use the present invention.
Various modifications to these embodiments will be apparent to those skilled in the art, as defined herein
General Principle can be realized in other embodiments without departing from the spirit or scope of the present invention.Therefore, of the invention
It is not intended to be limited to the embodiments shown herein, and is to fit to and the principles and novel features disclosed herein phase one
The widest range caused.
Claims (10)
1. a kind of measuring device of external chest compression frequency, which is characterized in that including：
Display；
For real-time sampling patient electrocardiosignal and obtain the electrocardio sample circuit of sample sequence；
Input terminal connect with the output end of the electrocardio sample circuit, the controller that output end is connect with the display, is used for
When detecting that the patient is carrying out external chest compression according to the sample sequence, according to the corresponding sampling of the external chest compression
Retrieval compression frequency sequence, and output this to the display and show.
2. the measuring device of external chest compression frequency as described in claim 1, which is characterized in that the measuring device further includes：
The voice prompting device being connect with the control terminal of the controller；The controller be additionally operable to according to current press frequency with it is pre-
It is marked with the comparative situation of quasi- compression frequency range, the voice prompting device is controlled and makes the prompt of corresponding pressing speed.
3. the measuring device of external chest compression frequency as described in claim 1, which is characterized in that the electrocardio sample circuit includes
For the first electrocardio electrode plate of real-time sampling left lower extremity voltage, for the second electrocardioelectrode of real-time sampling right upper extremity voltage
Piece, for first signal buffer circuit of the left lower extremity voltage in predetermined safe range of limited samples, for limited samples
Second signal buffer circuit and differential amplifier circuit of the right upper extremity voltage in the safe range, wherein：
First electrocardio electrode plate is connect by conducting wire with the input terminal of the first signal buffer circuit, first letter
The output end of number buffer circuit is connect with the first input end of the differential amplifier circuit, and second electrocardio electrode plate is by leading
On line is connect with the input terminal of the second signal buffer circuit, output end and the difference of the second signal buffer circuit
Second input terminal of amplifying circuit connects, the output of the output end of the differential amplifier circuit as the electrocardio sample circuit
End；
The differential amplifier circuit is used to make difference in real time to the left lower extremity voltage and the right upper extremity voltage, obtains the sampling
Sequence.
4. the measuring device of external chest compression frequency as claimed in claim 3, which is characterized in that the first signal buffer circuit
And second signal buffer circuit includes gas-discharge tube GDT, passive low-pass filter circuit, positive supply, the first diode, negative electricity
Source and the second diode, wherein：
The first end of the GDT is connect with the input terminal of the passive low-pass filter circuit, and common end mutually should be used as described
The input terminal of one signal buffer circuit and second signal buffer circuit, the second end ground connection of the GDT, the passive low-pass filter
The output end of circuit is connect with the anode of the cathode of first diode and second diode respectively, and common end is corresponding
As the first signal buffer circuit and the output end of second signal buffer circuit, the anode of first diode with it is described
Negative supply connects, and the cathode of second diode is connect with the positive supply.
5. the measuring device of external chest compression frequency as claimed in claim 3, which is characterized in that the electrocardio sample circuit also wraps
It includes：
Input terminal connect with the output end of the differential amplifier circuit, output end of the output end as the electrocardio sample circuit,
Signal filter circuit for being filtered to the sample sequence.
6. the measuring device of external chest compression frequency as described in claim 1, which is characterized in that the measuring device further includes：
It is connect with the output end of the controller, for will be in the compression frequency sequence real-time Transmission to the central monitoring of hospital
The data transmission module of the heart.
7. the measuring device of external chest compression frequency as claimed in claim 6, which is characterized in that the data transmission module is specific
For wireless transport module.
8. the measuring device of external chest compression frequency as claimed in claim 7, which is characterized in that the measuring device further includes：
It is connect with the output end of the controller, the memory for storing the compression frequency sequence.
9. such as the measuring device of claim 1-8 any one of them external chest compression frequencies, which is characterized in that the controller packet
It includes：
Sampling filter module, for when detecting that the patient is carrying out external chest compression according to the sample sequence, by institute
State each sampled signal elder generation low-pass filtering in the corresponding sample sequence of external chest compression medium filtering again；
Frequency seeks module, for from determined in filtered sample sequence between adjacent minimum point or maximum point when
Between be spaced；Successively divided by the time interval obtains compression frequency sequence by electrocardio sample frequency, it and outputs this to described aobvious
Show that device is shown.
10. the measuring device of external chest compression frequency as claimed in claim 9, which is characterized in that the controller further includes：
Extreme value determining module, for being determined between adjacent minimum point or maximum point from filtered sample sequence
Before time interval, determine maximum point and minimum point successively from filtered sample sequence, however, it is determined that adjacent two
Point pnAnd pn+1Between time interval in preset time range, ordinate difference be more than default adaptive threshold h, it is determined that pn
And pn+1For extreme point caused by the external chest compression；Wherein, h=k Δs yn-1, 0 k≤1 <, Δ yn-1For last two determined
The ordinate difference of extreme point.
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