CN108785049B - Measuring device for external chest compression frequency - Google Patents
Measuring device for external chest compression frequency Download PDFInfo
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- CN108785049B CN108785049B CN201810343287.6A CN201810343287A CN108785049B CN 108785049 B CN108785049 B CN 108785049B CN 201810343287 A CN201810343287 A CN 201810343287A CN 108785049 B CN108785049 B CN 108785049B
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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
Abstract
The invention discloses a measuring device for chest compression frequency, which comprises: a display; the electrocardio sampling circuit is used for sampling electrocardiosignals of a patient in real time and obtaining a sampling sequence; the controller is used for acquiring the compression frequency sequence according to the sampling sequence corresponding to the chest compression and outputting the compression frequency sequence to the display for displaying when detecting that the patient is performing the chest compression according to the sampling sequence, so that a compressor can judge whether the compression frequency at the moment meets the cardio-pulmonary resuscitation requirement, and if not, the compression frequency is timely adjusted to a specified range. Therefore, the pressor can refer to the acquired pressing frequency sequence and adjust the self pressing frequency in the process of carrying out chest pressing on the patient, so that the pressing frequency is accurately grasped, the cardio-pulmonary resuscitation effect is good, and the survival rate of the patient is improved.
Description
Technical Field
The invention relates to the field of medical electronic information, in particular to a device for measuring the chest compression frequency.
Background
At present, scientific studies have shown that cardiac arrest refers to a sudden loss of cardiac function, and that patients with cardiac arrest should be immediately subjected to cardiopulmonary resuscitation to improve patient survival. Chest compression is one of the necessary means in cardiopulmonary resuscitation, and the compression frequency of chest compression directly influences the effect of cardiopulmonary resuscitation. If the in-process of pressing outside the chest to the patient, it is inaccurate to pressing the frequency assurance, not only can influence cardiopulmonary resuscitation's effect, can cause serious injury to the patient even. It can be seen that measuring the frequency of compressions is of great significance in assessing the effect of chest compressions.
Therefore, how to provide a solution to the above technical problem is a problem that needs to be solved by those skilled in the art.
Disclosure of Invention
The invention aims to provide a device for measuring the chest compression frequency, which can be used for a pressor to refer to an acquired compression frequency sequence and adjust the compression frequency of the pressor during the chest compression of a patient, so that the pressing frequency can be accurately grasped, the cardiopulmonary resuscitation effect is good, and the survival rate of the patient is improved.
In order to solve the above technical problem, the present invention provides a device for measuring chest compression frequency, comprising:
a display;
the electrocardio sampling circuit is used for sampling electrocardiosignals of a patient in real time and obtaining a sampling sequence;
the controller is used for acquiring a compression frequency sequence according to a sampling sequence corresponding to chest compression and outputting the compression frequency sequence to the display for displaying when the fact that the patient is performing chest compression is detected according to the sampling sequence.
Preferably, the measuring device further comprises:
the voice prompter is connected with the control end of the controller; the controller is also used for controlling the voice prompter to make corresponding pressing speed prompt according to the comparison condition of the current pressing frequency and the preset standard pressing frequency range.
Preferably, the electrocardiograph sampling circuit comprises a first electrocardiograph electrode slice for sampling the voltage of the left lower limb in real time, a second electrocardiograph electrode slice for sampling the voltage of the right upper limb in real time, a first signal buffer circuit for limiting the voltage of the left lower limb to be sampled within a preset safety range, a second signal buffer circuit for limiting the voltage of the right upper limb to be sampled within the safety range, and a differential amplification circuit, wherein:
the first electrocardio electrode plate is connected with the input end of the first signal buffer circuit through a lead wire, the output end of the first signal buffer circuit is connected with the first input end of the differential amplification circuit, the second electrocardio electrode plate is connected with the input end of the second signal buffer circuit through a lead wire, the output end of the second signal buffer circuit is connected with the second input end of the differential amplification circuit, and the output end of the differential amplification circuit is used as the output end of the electrocardio sampling circuit;
and the differential amplification circuit is used for carrying out real-time difference on the voltage of the left lower limb and the voltage of the right upper limb to obtain the sampling sequence.
Preferably, the first signal buffer circuit and the second signal buffer circuit each include a gas discharge tube GDT, a passive low-pass filter circuit, a positive power supply, a first diode, a negative power supply, and a second diode, wherein:
the first end of the GDT is connected with the input end of the passive low-pass filter circuit, the common end of the GDT is correspondingly used as the input ends of the first signal buffer circuit and the second signal buffer circuit, the second end of the GDT is grounded, the output end of the passive low-pass filter circuit is respectively connected with the cathode of the first diode and the anode of the second diode, the common end of the passive low-pass filter circuit is correspondingly used as the output ends of the first signal buffer circuit and the second signal buffer circuit, the anode of the first diode is connected with the negative power supply, and the cathode of the second diode is connected with the positive power supply.
Preferably, the electrocardiograph sampling circuit further comprises:
the input end of the signal filtering circuit is connected with the output end of the differential amplifying circuit, the output end of the signal filtering circuit is used as the output end of the electrocardio sampling circuit, and the signal filtering circuit is used for filtering the sampling sequence.
Preferably, the measuring device further comprises:
and the data transmission module is connected with the output end of the controller and is used for transmitting the pressing frequency sequence to a central monitoring center of a hospital in real time.
Preferably, the data transmission module is specifically a wireless transmission module.
Preferably, the measuring device further comprises:
and the memory is connected with the output end of the controller and is used for storing the pressing frequency sequence.
Preferably, the controller includes:
the sampling filtering module is used for low-pass filtering and then median filtering each sampling signal in the sampling sequence corresponding to the chest compression when the patient is detected to be chest compression according to the sampling sequence;
the frequency solving module is used for determining adjacent minimum value points or time intervals between the maximum value points from the filtered sampling sequence; and sequentially dividing the electrocardio sampling frequency by the time interval to obtain a pressing frequency sequence, and outputting the pressing frequency sequence to the display for displaying.
Preferably, the controller further comprises:
an extreme value determining module, configured to determine a maximum value point and a minimum value point in sequence from the filtered sampling sequence before determining adjacent minimum value points or time intervals between the maximum value points from the filtered sampling sequence, and if the determined adjacent two points p are determinednAnd pn+1The time interval between the two is within the preset time range, the difference value of the longitudinal coordinates is greater than the preset self-adaptive threshold value h, and then p is determinednAnd pn+1An extreme point caused by the chest compressions; wherein h is k Δ yn-1，0＜k≤1，Δyn-1The difference value of the vertical coordinates of the two polar points determined last time is obtained.
The invention provides a device for measuring the chest compression frequency, which comprises: a display; the electrocardio sampling circuit is used for sampling electrocardiosignals of a patient in real time and obtaining a sampling sequence; and the controller is used for acquiring the compression frequency sequence according to the sampling sequence corresponding to the chest compression and outputting the compression frequency sequence to the display for display when detecting that the patient is performing the chest compression according to the sampling sequence.
This application is through electrocardio sampling circuit real-time sampling patient's electrocardiosignal and obtain the sampling sequence, then whether carry out chest compression by the controller according to the sampling sequence detection patient, if detect the patient and carry out chest compression, press the sampling sequence that corresponds according to chest and obtain the frequency sequence of pressing to export the display demonstration, whether in order to press the person and judge the frequency of pressing at this moment and accord with cardiopulmonary resuscitation requirement, if do not accord with, in time adjust the frequency of pressing to the regulation scope. Therefore, the pressor can refer to the acquired pressing frequency sequence and adjust the self pressing frequency in the process of carrying out chest pressing on the patient, so that the pressing frequency is accurately grasped, the cardio-pulmonary resuscitation effect is good, and the survival rate of the patient is improved.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed in the prior art and the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
FIG. 1 is a schematic structural diagram of a device for measuring the frequency of chest compressions;
FIG. 2 is a schematic diagram of a differential amplifier circuit according to the present invention;
fig. 3 is a schematic structural diagram of a signal buffer circuit according to the present invention.
Detailed Description
The core of the invention is to provide a device for measuring the external chest compression frequency, and a pressor can refer to the acquired compression frequency sequence and adjust the self compression frequency in the external chest compression process of a patient, so that the pressing frequency can be grasped accurately, the cardiopulmonary resuscitation effect is good, and the survival rate of the patient is improved.
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, fig. 1 is a schematic structural diagram of a device for measuring chest compression frequency according to the present invention. The measuring device includes:
a display 1;
an electrocardio sampling circuit 2 for sampling electrocardiosignals of a patient in real time and obtaining a sampling sequence;
and the controller 3 is connected with the output end of the electrocardio sampling circuit 2 at the input end and the display 1 at the output end, and is used for acquiring a compression frequency sequence according to a sampling sequence corresponding to chest compression when detecting that the patient is performing chest compression according to the sampling sequence and outputting the compression frequency sequence to the display 1 for display.
It should be noted that the preset in the present application is set in advance, and the preset is not required to be reset unless modified according to actual conditions.
Specifically, sudden cardiac arrest is a serious disease that, if not rescued in a timely manner, causes irreversible damage to the brain and other vital organs and tissues of the human body after 4 to 6 minutes. Scientific studies have shown that immediate cardiopulmonary resuscitation on patients with cardiac arrest is effective in increasing patient survival. Chest compressions are a very important component of cardiopulmonary resuscitation, with chest compression frequencies of 100 to 120 compressions per minute being recommended in international guidelines for cardiopulmonary resuscitation.
Based on this, this application provides a measuring device of extrathoracic compression frequency, includes electrocardio sampling circuit 2, controller 3 and display 1. First, the electrocardiographic signal of the patient is sampled by the electrocardiographic sampling circuit 2 at a set electrocardiographic sampling frequency to obtain a sampling sequence, and the sampling sequence is transmitted to the controller 3 in real time. The controller 3 of this application can real-time detection sampling sequence, when detecting that the patient takes place cardiac arrest, can control the alarm and send out the police dispatch newspaper to remind the succour to carry out the chest immediately and press to the patient.
The invention provides a device for measuring the chest compression frequency, which comprises: a display; the electrocardio sampling circuit is used for sampling electrocardiosignals of a patient in real time and obtaining a sampling sequence; and the controller is used for acquiring the compression frequency sequence according to the sampling sequence corresponding to the chest compression and outputting the compression frequency sequence to the display for display when detecting that the patient is performing the chest compression according to the sampling sequence.
This application is through electrocardio sampling circuit real-time sampling patient's electrocardiosignal and obtain the sampling sequence, then whether carry out chest compression by the controller according to the sampling sequence detection patient, if detect the patient and carry out chest compression, press the sampling sequence that corresponds according to chest and obtain the frequency sequence of pressing to export the display demonstration, whether in order to press the person and judge the frequency of pressing at this moment and accord with cardiopulmonary resuscitation requirement, if do not accord with, in time adjust the frequency of pressing to the regulation scope. Therefore, the pressor can refer to the acquired pressing frequency sequence and adjust the self pressing frequency in the process of carrying out chest pressing on the patient, so that the pressing frequency is accurately grasped, the cardio-pulmonary resuscitation effect is good, and the survival rate of the patient is improved.
On the basis of the above-described embodiment:
as a preferred embodiment, the measuring device further comprises:
the voice prompter is connected with the control end of the controller 3; the controller 3 is also used for controlling the voice prompter to make a corresponding pressing speed prompt according to the comparison condition of the current pressing frequency and the preset standard pressing frequency range.
In particular, the present application also includes a voice prompter controlled by the controller 3. The controller 3 compares the current pressing frequency of the pressers with a set standard pressing frequency range, and when the current pressing frequency is in the standard pressing frequency range, the pressing is in accordance with the standard, the voice prompter is controlled to prompt the pressing to be in accordance with the standard; when the current pressing frequency exceeds the upper limit of the standard pressing frequency range, the pressing is too fast, and the voice prompter is controlled to prompt the pressing to be too fast; and when the current pressing frequency is less than the lower limit of the standard pressing frequency range, the pressing is too slow, and the voice prompter is controlled to prompt that the pressing is too slow. Therefore, the pressing person can adjust the pressing frequency of the pressing person in time through the prompt of the voice prompt, the pressing person does not need to judge and adjust the pressing frequency, and the pressing effect of the pressing person is improved.
As a preferred embodiment, the electrocardiograph sampling circuit 2 includes a first electrocardiograph electrode slice for sampling the voltage of the left lower limb in real time, a second electrocardiograph electrode slice for sampling the voltage of the right upper limb in real time, a first signal buffer circuit for limiting the sampled voltage of the left lower limb within a preset safety range, a second signal buffer circuit for limiting the sampled voltage of the right upper limb within the safety range, and a differential amplifier circuit, wherein:
the first electrocardio electrode plate is connected with the input end of the first signal buffer circuit through a lead wire, the output end of the first signal buffer circuit is connected with the first input end of the differential amplification circuit, the second electrocardio electrode plate is connected with the input end of the second signal buffer circuit through a lead wire, the output end of the second signal buffer circuit is connected with the second input end of the differential amplification circuit, and the output end of the differential amplification circuit is used as the output end of the electrocardio sampling circuit 2;
the differential amplification circuit is used for carrying out real-time difference on the voltage of the left lower limb and the voltage of the right upper limb to obtain a sampling sequence.
Specifically, the electrocardiograph sampling circuit 2 in the present application includes a first electrocardiograph electrode pad, a second electrocardiograph electrode pad, a first signal buffer circuit, a second signal buffer circuit, and a differential amplifier circuit. The first electrocardio-electrode plate is used for sampling the voltage of the left lower limb of a patient in real time, and the second electrocardio-electrode plate is used for sampling the voltage of the right upper limb of the patient in real time.
Considering that there may be static electricity on the patient and strong electric pulse applied to the patient during electrical defibrillation causes the voltage values of the sampled left lower limb voltage and right upper limb voltage to be too large, thereby damaging the post-stage circuit, the first signal buffer circuit is arranged at the output end of the first electrocardio-electrode slice in the application for limiting the sampled left lower limb voltage within the set safe voltage range. And a second signal buffer circuit is also arranged at the output end of the second electrocardio-electrode plate and used for limiting the voltage of the sampled right upper limb within a safe voltage range, so that a post-stage circuit is protected.
Then, the difference amplifying circuit performs difference amplification on the buffered left lower limb voltage and the buffered right upper limb voltage, and the difference value of the left lower limb voltage and the right upper limb voltage can be used as an electrocardiosignal of the patient, so that the electrocardiosignal of the patient is sampled by the electrocardio sampling circuit 2, and a sampling sequence is obtained.
Referring to fig. 2, fig. 2 is a schematic structural diagram of a differential amplifier circuit according to the present invention. In fig. 2, under the condition that the differential amplifier circuit is symmetrical, the differential amplifier circuit has strong capabilities of suppressing zero drift and suppressing noise and interference.
Referring to fig. 3, fig. 3 is a schematic structural diagram of a signal buffer circuit according to the present invention.
As a preferred embodiment, the first signal buffer circuit and the second signal buffer circuit each include a gas discharge tube GDT, a passive low pass filter circuit LPF1, a positive power supply, a first diode D1, a negative power supply, and a second diode D2, wherein:
the first end of the GDT is connected with the input end of the passive low-pass filter circuit LPF1, the common end of the GDT is correspondingly used as the input end of the first signal buffer circuit and the input end of the second signal buffer circuit, the second end of the GDT is grounded, the output end of the passive low-pass filter circuit LPF1 is respectively connected with the cathode of the first diode D1 and the anode of the second diode D2, the common end of the GDT is correspondingly used as the output end of the first signal buffer circuit and the output end of the second signal buffer circuit, the anode of the first diode D1 is connected with a negative power supply, and the cathode of the second diode D2 is connected with a positive.
Specifically, the first signal buffer circuit and the second signal buffer circuit in the present application each include a GDT (gas discharge tube), a passive low pass filter LPF1, a positive power supply, a first diode D1, a negative power supply, and a second diode D2.
The GDT has the functions of releasing transient overcurrent and limiting overvoltage, so that a rear-stage circuit is protected from the influence of a defibrillation electrode; the passive low-pass filter circuit LPF1 can improve the signal-to-noise ratio and the input impedance of the electrocardiograph signal, and the passive low-pass filter circuit LPF1 in the present application is composed of a resistor R1 and a capacitor C1, as shown in fig. 3; the first diode D1 and the second diode D2 form a limiting circuit, and when the input voltage of the first diode D1 and the second diode D2 is higher than the voltage of the positive power supply or lower than the voltage of the negative power supply, the input voltage can be kept at a safe value, and the rear-stage circuit is prevented from being damaged.
The first signal buffer circuit and the second signal buffer circuit of the present application may further include another passive low pass filter circuit LPF2, a current limiting resistor R, and an amplifier U at a post-stage of the amplitude limiting circuit. Wherein, the other passive low-pass filter circuit LPF2 further improves the signal-to-noise ratio and the input impedance of the electrocardiosignal; the current limiting resistor R limits the input current of the rear-stage circuit, so that the rear-stage circuit is protected; the amplifier U further increases the input impedance.
As a preferred embodiment, the electrocardiograph sampling circuit 2 further includes:
the input end of the signal filter circuit is connected with the output end of the differential amplifying circuit, the output end of the signal filter circuit is used as the output end of the electrocardio sampling circuit 2, and the signal filter circuit is used for filtering the sampling sequence.
Furthermore, considering that interference signals may exist in a sampling sequence output by the differential amplification circuit, the signal filtering circuit is added at the later stage of the differential amplification circuit to play a role in filtering the interference signals, so that the pressing frequency sequence obtained by the controller 3 has a higher reference value.
As a preferred embodiment, the measuring device further comprises:
and the data transmission module is connected with the output end of the controller 3 and is used for transmitting the pressing frequency sequence to a central monitoring center of a hospital in real time.
Furthermore, the system can further comprise a data transmission module, wherein the data transmission module is used for transmitting the pressing frequency sequence to a central monitoring center of a hospital in real time, so that the central monitoring center can conveniently perform centralized management on the pressing frequency sequence. In addition, the data transmission module can also transmit other data in the chest compression process to a central monitoring center of the hospital, and the data are valuable to the hospital and have good reference value.
As a preferred embodiment, the data transmission module is embodied as a wireless transmission module.
Specifically, the data transmission module in the present application may adopt a wireless transmission mode, such as a WIFI module, and the present application is not particularly limited herein.
As a preferred embodiment, the measuring device further comprises:
a memory connected to the output of the controller 3 for storing the sequence of compression frequencies.
Furthermore, the application may include a memory for storing the compression frequency sequence and for storing other data during chest compressions, which may be used as reference data for later studies of chest compressions. The memory may be, but is not limited to, a portable memory card with a large capacity and a small volume.
As a preferred embodiment, the controller 3 includes:
the sampling filtering module is used for low-pass filtering and then median filtering each sampling signal in the sampling sequence corresponding to the chest compression when detecting that the patient is performing the chest compression according to the sampling sequence;
the frequency solving module is used for determining adjacent minimum value points or time intervals between the maximum value points from the filtered sampling sequence; the electrocardio sampling frequency is divided by the time interval in turn to obtain a pressing frequency sequence, and the pressing frequency sequence is output to the display 1 for displaying.
Specifically, the specific process of obtaining the compression frequency sequence by the controller 3 includes: each sampling signal in the corresponding sampling sequence of chest compression is low-pass filtered earlier by controller 3's sampling filter module, and low-pass filtering is a filtering method, and the rule is that the low frequency signal that does not exceed the settlement critical value can normally pass through, and the high frequency signal that exceeds the settlement critical value is then obstructed, weakened, and this application sets up cutoff frequency and can be but not only be limited to 3 Hz. The sampling filtering module filters the median of each sampling signal, the median filtering is a nonlinear signal processing technology which is based on the ordering statistical theory and can effectively inhibit noise, the median filtering can protect the edge of the signal from being blurred while filtering the noise, and the algorithm of the median filtering is simple and is easy to realize by hardware. Then, a frequency solving module of the controller 3 determines a horizontal coordinate difference value between adjacent minimum value points from the filtered sampling sequence, namely a time interval; then, the electrocardio sampling frequency is divided by the time interval in sequence to obtain a compression frequency sequence. Alternatively, the time interval between adjacent maxima points is determined from the filtered sample sequence to obtain a compression frequency sequence.
As a preferred embodiment, the controller 3 further includes:
an extreme value determining module, configured to determine a maximum value point and a minimum value point in sequence from the filtered sampling sequence before determining adjacent minimum value points or time intervals between the maximum value points from the filtered sampling sequence, and if the determined adjacent two points p are determinednAnd pn+1The time interval between the two is within the preset time range, the difference value of the longitudinal coordinates is greater than the preset self-adaptive threshold value h, and then p is determinednAnd pn+1Extreme points caused by chest compressions; wherein h is k Δ yn-1，0＜k≤1，Δyn-1The difference value of the vertical coordinates of the two polar points determined last time is obtained.
Further, considering that the extreme point in the sampling sequence may not be caused by chest compression, resulting in an error in the obtained compression frequency sequence, the present application sequentially determines the maximum value point and the minimum value point from the filtered sampling sequence by the extreme value determining module of the controller 3 before determining the adjacent minimum value point or the time interval between the maximum value points from the filtered sampling sequence, and when determining the adjacent two points pnAnd pn+1When the time interval between the two points is within the set time range and the difference value of the vertical coordinates of the two points is greater than the set adaptive threshold value, p is indicatednAnd pn+1For extreme points caused by chest compression, a compression frequency sequence is obtained according to the time interval between adjacent maximum points or minimum points in the extreme points caused by chest compression, so that the accuracy and reliability of obtaining the compression frequency sequence are improved.
The application also considers that the pressing force of the pressers is not always the same every time, so that the difference value of the vertical coordinates between two adjacent points does not remain unchanged, so the adaptive threshold value can be set as follows: h ═ k Δ yn-1Wherein k is more than 0 and less than or equal to 1, k can be selected from but not limited to 0.7,Δyn-1the difference value of the vertical coordinates of the two polar points determined last time is obtained. That is, although the pressing force varies, the pressing force is considered to be effective as long as the pressing force is within a reasonable range.
It is further noted that, in the present specification, relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (8)
1. A device for measuring the frequency of chest compressions, comprising:
a display;
the electrocardio sampling circuit is used for sampling electrocardiosignals of a patient in real time and obtaining a sampling sequence;
the controller is used for acquiring a compression frequency sequence according to a sampling sequence corresponding to chest compression and outputting the compression frequency sequence to the display for display when the fact that the patient is chest-compressed is detected according to the sampling sequence;
the controller includes:
the sampling filtering module is used for low-pass filtering and then median filtering each sampling signal in the sampling sequence corresponding to the chest compression when the patient is detected to be chest compression according to the sampling sequence;
the frequency solving module is used for determining adjacent minimum value points or time intervals between the maximum value points from the filtered sampling sequence; sequentially dividing the electrocardio sampling frequency by the time interval to obtain a pressing frequency sequence, and outputting the pressing frequency sequence to the display for display;
the controller further includes:
an extreme value determining module, configured to determine a maximum value point and a minimum value point in sequence from the filtered sampling sequence before determining adjacent minimum value points or time intervals between the maximum value points from the filtered sampling sequence, and if the determined adjacent two points p are determinednAnd pn+1The time interval between the two is within the preset time range, the difference value of the longitudinal coordinates is greater than the preset self-adaptive threshold value h, and then p is determinednAnd pn+1An extreme point caused by the chest compressions; wherein h is k Δ yn-1，0＜k≤1，Δyn-1The difference value of the vertical coordinates of the two polar points determined last time is obtained.
2. The device for measuring the frequency of chest compressions of claim 1 further comprising:
the voice prompter is connected with the control end of the controller; the controller is also used for controlling the voice prompter to make corresponding pressing speed prompt according to the comparison condition of the current pressing frequency and the preset standard pressing frequency range.
3. The device for measuring the chest compression frequency according to claim 1, wherein the ecg sampling circuit comprises a first ecg electrode pad for sampling the voltage of the left lower limb in real time, a second ecg electrode pad for sampling the voltage of the right upper limb in real time, a first signal buffer circuit for limiting the voltage of the sampled left lower limb within a preset safety range, a second signal buffer circuit for limiting the voltage of the sampled right upper limb within the safety range, and a differential amplifier circuit, wherein:
the first electrocardio electrode plate is connected with the input end of the first signal buffer circuit through a lead wire, the output end of the first signal buffer circuit is connected with the first input end of the differential amplification circuit, the second electrocardio electrode plate is connected with the input end of the second signal buffer circuit through a lead wire, the output end of the second signal buffer circuit is connected with the second input end of the differential amplification circuit, and the output end of the differential amplification circuit is used as the output end of the electrocardio sampling circuit;
and the differential amplification circuit is used for carrying out real-time difference on the voltage of the left lower limb and the voltage of the right upper limb to obtain the sampling sequence.
4. The device for measuring the frequency of chest compressions as claimed in claim 3, wherein said first and second signal buffer circuits each comprise a gas discharge tube GDT, a passive low pass filter circuit, a positive power supply, a first diode, a negative power supply and a second diode, wherein:
the first end of the GDT is connected with the input end of the passive low-pass filter circuit, the common end of the GDT is correspondingly used as the input ends of the first signal buffer circuit and the second signal buffer circuit, the second end of the GDT is grounded, the output end of the passive low-pass filter circuit is respectively connected with the cathode of the first diode and the anode of the second diode, the common end of the passive low-pass filter circuit is correspondingly used as the output ends of the first signal buffer circuit and the second signal buffer circuit, the anode of the first diode is connected with the negative power supply, and the cathode of the second diode is connected with the positive power supply.
5. The device for measuring the frequency of chest compressions as set forth in claim 3, wherein said electrical cardiac sampling circuit further includes:
the input end of the signal filtering circuit is connected with the output end of the differential amplifying circuit, the output end of the signal filtering circuit is used as the output end of the electrocardio sampling circuit, and the signal filtering circuit is used for filtering the sampling sequence.
6. The device for measuring the frequency of chest compressions of claim 1 further comprising:
and the data transmission module is connected with the output end of the controller and is used for transmitting the pressing frequency sequence to a central monitoring center of a hospital in real time.
7. The device for measuring the frequency of chest compressions as claimed in claim 6 wherein said data transmission module is embodied as a wireless transmission module.
8. The device for measuring the frequency of chest compressions of claim 7 further comprising:
and the memory is connected with the output end of the controller and is used for storing the pressing frequency sequence.
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101496767A (en) * | 2009-02-27 | 2009-08-05 | 武汉依瑞德医疗设备新技术有限公司 | External cardiac massage rhythm prompting device and method thereof |
| CN101828916A (en) * | 2010-05-07 | 2010-09-15 | 深圳大学 | Electrocardiosignal processing system |
| CN102596312A (en) * | 2009-11-16 | 2012-07-18 | 皇家飞利浦电子股份有限公司 | Overvoltage protection for defibrillator |
| CN205215210U (en) * | 2015-11-04 | 2016-05-11 | 恩识医疗科技(上海)有限公司 | Attached formula developments heart electrographic recording appearance and system thereof |
| CN105578960A (en) * | 2013-09-27 | 2016-05-11 | 皇家飞利浦有限公司 | Processing apparatus, processing method and system for processing a physiological signal |
| CN106726437A (en) * | 2016-12-06 | 2017-05-31 | 汕头大学 | CPR assistor |
| CN107899134A (en) * | 2017-12-28 | 2018-04-13 | 乐康科仪（北京）科技有限公司 | A kind of defibrillator analyzer |
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| US20050131465A1 (en) * | 2000-02-04 | 2005-06-16 | Freeman Gary A. | Integrated resuscitation |
| JP5156024B2 (en) * | 2006-12-14 | 2013-03-06 | ハートサイン テクノロジーズ リミテッド | Cardiopulmonary resuscitation pressure indicator |
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Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101496767A (en) * | 2009-02-27 | 2009-08-05 | 武汉依瑞德医疗设备新技术有限公司 | External cardiac massage rhythm prompting device and method thereof |
| CN102596312A (en) * | 2009-11-16 | 2012-07-18 | 皇家飞利浦电子股份有限公司 | Overvoltage protection for defibrillator |
| CN101828916A (en) * | 2010-05-07 | 2010-09-15 | 深圳大学 | Electrocardiosignal processing system |
| CN105578960A (en) * | 2013-09-27 | 2016-05-11 | 皇家飞利浦有限公司 | Processing apparatus, processing method and system for processing a physiological signal |
| CN205215210U (en) * | 2015-11-04 | 2016-05-11 | 恩识医疗科技(上海)有限公司 | Attached formula developments heart electrographic recording appearance and system thereof |
| CN106726437A (en) * | 2016-12-06 | 2017-05-31 | 汕头大学 | CPR assistor |
| CN107899134A (en) * | 2017-12-28 | 2018-04-13 | 乐康科仪（北京）科技有限公司 | A kind of defibrillator analyzer |
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