TWM630631U - Accurate heart sound control external counterpulsation system - Google Patents

Abstract

A precise heart sound control external counterpulsation system mainly includes: a heart sound detector for simply sticking on the patient's chest to obtain a personalized and accurate modeling of the cardiac valve opening sound signal, and; an external counterpulsation system and its control unit It is connected to the information transmission of the heart sound detector, and can be based on the personalized and accurately modeled cardiac valve opening sound signal obtained by the heart sound detector to confirm that the heart is really in the diastolic period of blood outflow, and the control unit starts to monitor the patient. Begin to apply pressure; start to release pressure on the patient in the late period of diastole; the overall effective design can effectively control the optimal pressure operation of the external counterpulsation system to ensure safety, and greatly increase the effect of counterpulsation therapy to improve blood circulation.

Description

Accurate heart sound control external counterpulsation system

This creation is related to the technical field of external counterpulsation system control, especially a precise heart sound control external counterpulsation system.

External counterpulsation therapy EECP (Enhanced External CounterPulsation) is a non-invasive mechanical assisted circulatory device that can be treated in an outpatient clinic without hospitalization or surgery. It has the advantages of vascular endothelial cell structure and function, preventing thrombosis and promoting the formation of vascular collateral circulation.

As shown in Figure 6, in the current conventional external counterpulsation therapy, there are many and complicated wirings on the patient's body, and the operation is very troublesome. In addition to helping the patient lying on the treatment bed, the medical staff has to separate the calf, thigh and buttocks. In addition to wearing and tying the pulse pressure belt, it is also necessary to paste a cardiac guide plate on the chest of each patient and connect the lead wire one by one, so as to determine the frequency of the counterpulsation treatment according to the current ECG waveform of the patient, and use it in the heart. During the diastole (T-wave), the pulse pressure belt is inflated and pressurized in sections from the calf, thigh to the buttocks, respectively, to drive the blood of the lower limbs back to the heart, thereby promoting the blood circulation of the heart, brain and other organs, and improving cardiac muscle ischemia. On the contrary, when the heart is systolic (P-wave), the pulse pressure belt is decompressed, which reduces the vascular resistance of the lower extremities and reduces the workload of the heart.

In addition, the heart is also used to generate four heart sounds S1, S2, S3, S4 in one cardiac cycle, of which the second heart sound of S2 is generally considered to occur at the beginning of the diastolic period, so it is used as a counterpulsation booster to start control, but in fact The four heart sounds S1, S2, S3, and S4 are common sounds, mainly from the mechanical vibration caused by myocardial contraction and relaxation, valve opening and closing, and blood flow impacting the ventricular wall and aorta, and then transmitted to the chest wall through the surrounding tissue. Heart sounds S1, S2, S3, and S4 are like four violins playing together. I want to filter out the sound of which violin simply and specially. S2 is the exact sound of the heart. In fact, there are certain sounds. difficulty.

Moreover, whether the ECG or heart sound signal is used as the counterpulsation control, most of the detected values use the average value of the previous cumulative period as a reference. For patients with complex ECG or pulse pressure signals, the stability is not enough, and it is easily caused by external interference and misjudgment. The cycle is inaccurate, which affects the effect of real-time control of the on-site counterpulsation operation, causing errors between the actual operation of the heart and the timing of the optimal counterpulsation pressure. This not only fails to achieve the ideal counterpulsation treatment effect, but also causes extra burden on the heart, which is potentially dangerous to the patient.

In view of this, the main purpose of this creation is to provide a precise heart sound control external counterpulsation system, which mainly includes: a heart sound detector and an external counterpulsation system; wherein

The heart sound detector has at least one monitoring module, and the monitoring module is provided with a micro microphone to be connected to a microcomputer circuit. The microcomputer circuit has at least a preamplifier, a filter amplifier, and an A/D linear-to-digital converter. , to process the patient's heart sound source signal captured by the micro microphone; a signal processing unit is built in the microcomputer circuit to analyze the heart sound source signal with AI artificial intelligence and neural-like operations to extract an effective heart sound event signal, And; a signal analysis unit is built in the microcomputer circuit to model the effective heart sound event signal, and the modeling reference is taken from two data, one is the mode heart sound empirical data of the big data, and one is the patient's own Cardiac information of heart sounds, so as to obtain a personalized and accurate modeling of the cardiac valve opening sound signal, confirming the diastolic period immediately following the outflow of cardiac blood, and;

The external counterpulsation system is provided with a control unit to control a pressurizing device and a plurality of pulse pressure belts connected thereto, the control unit is connected with the information transmission of the heart sound detector, and the personalized precision is obtained according to the heart sound detector. The modeled cardiac valve opening sound signal confirms that it is the diastolic period when the heart blood flows out, and the control unit starts to apply pressure to the patient; in the late diastolic period, the pressure is released to the patient to adjust and improve the blood flow with the effective counterpulsation pressure. cycle.

Compared with the prior art, the present invention creates a precise heart sound control external counterpulsation system, which can use an effective heart sound detector design to provide patients with the convenience of wearing and sticking it on the chest to obtain a personalized and accurate modeling of the opening sound of the heart valve. Acoustic signal, the operation is very simple and can be free of wiring, which effectively overcomes the tedious operation of using cardiac guide patches and connecting wires when the traditional external counterpulsation detects ECG. The sound signal of the heart valve opening of the model is used to accurately control the timing when the heart valve is opened and the blood is about to flow out. Apply pressure; in the late period of diastole, the patient begins to release pressure; therefore, it can do the best pressure operation control for the external counterpulsation system to ensure safety, and greatly increase the effect of counterpulsation therapy to improve blood circulation.

In order to facilitate the understanding of the content of this creation and the effects that can be achieved, specific embodiments are listed in conjunction with the diagrams, and the detailed description is as follows: Please refer to Figures 1 to 4, a precise heart sound control external counterpulsation set up in this creation. The system 100 mainly includes: a heart sound detector 10 and an external counterpulsation system 20; wherein

The heart sound detector 10 has at least one monitoring module 11, the monitoring module 11 is provided with a micro microphone 12 to connect with a microcomputer circuit 13, the microcomputer circuit 13 has at least a preamplifier 131, a filter amplifier 132, and An A/D linear-to-digital converter 133 is used to process the heart sound source signal of the patient captured by the micro microphone 12; The sound source signal is analyzed to extract the effective heart sound event signal, and; a signal analysis unit 142 is built in the microcomputer circuit 13 to model the effective heart sound event signal, and the modeling reference is taken from two data, one is large Moderate heart sound empirical data of the data, and a patient's own heart sound personal evidence data, so as to obtain a personalized and accurate modeling of the cardiac valve opening sound signal HSv, confirming that it is the diastolic period immediately following the outflow of cardiac blood, and;

The external counterpulsation system 20 is provided with a control unit 21 to control a pressurizing device 22 and a plurality of pulse pressure belts 23 connected thereto. The control unit 21 is connected to the heart sound detector 10 for information transmission. According to the heart sound detection The personalized and accurately modeled cardiac valve opening sound signal HSv obtained by the device 10 confirms that it is the diastolic period when the heart blood flows out, and the control unit 21 starts to apply pressure to the patient; Adjust and improve blood circulation with effective counterpulsation pressure.

In a preferred implementation, as shown in FIG. 3 , the heart sound detector 10 is further provided with a display module 15 , and the display module 15 is provided with a light-emitting display portion 150 externally.

In a preferred implementation, the light-emitting display portion 150 is further composed of a flexible light-emitting display screen, and has a cloth sheet 151 on which the flexible LED units 152 are directly arranged to connect to the monitoring module 11 .

In a preferred implementation, the monitoring module 11 is further provided with Bluetooth wireless transmission, so that the display content of the display module 15 can be wirelessly shared and displayed on the display screen 51 of an electronic device 50 .

In a preferred implementation, as shown in FIG. 3 and FIG. 4 , the monitoring module 11 is further provided with a movably connected communication power supply unit 30 , which has a wireless communication circuit 31 and a rechargeable battery 32 for supplying power to the microcomputer. The circuit 13 transmits the collected and processed heart sound data to the control unit 21 and an electronic device 50 with an APP application 52 through the wireless communication circuit 31, and the content is the same as that of the display module 15 and the monitor. Module 11 corresponds.

In a preferred implementation, the heart sound detector 10 is further assembled and electrically connected to a disposable cardiac guide patch 110, so that the microcomputer circuit 13 can simultaneously receive the patient's ECG signal, and detect accordingly. The patient's PQRST complex; based on the PQRST complex, a heart rate value is calculated.

More specifically, please refer to FIG. 1 to FIG. 5 , an application method of a precise heart sound control external counterpulsation system 100 of the present invention mainly includes: `

A heart sound detector 10 and an external counterpulsation system 20 are constructed. The external counterpulsation system 20 is provided with a control unit 21 to control a compression device 22 and a plurality of pulse pressure belts 23 connected thereto. The control unit 21 is connected with The heart sound detector 10 is connected for information transmission, and the heart sound detector 10 has at least a monitoring module 11 thereon. The monitoring module 11 is provided with a micro microphone 12 to be connected to a microcomputer circuit 13. The microcomputer circuit 13 at least includes A preamplifier 131, a filter amplifier 132, and an A/D linear-to-digital converter 133 to process the patient's heart sound source signal captured by the micro-microphone 12; a signal processing unit 141 is built in the microcomputer circuit 13 And a signal analysis unit 142 to intelligently analyze and build a model for the collected heart sound source signal, and perform the following processing steps:

S101 step 1. Let the patient wear the heart sound detector 10 to collect the heart sound source signal;

S102 Step 2. The collected heart sound source signal is analyzed by the signal processing unit 141 with AI artificial intelligence and neural-like operation to analyze the heart sound source signal to extract an effective heart sound event signal;

S103 Step 3. Use the signal analysis unit 142 to model the effective heart sound event signal, and the modeling reference is taken from two data, one is the mode heart sound empirical data of the big data, and one is the patient's own heart sound evidence material;

The processing methods in steps 2 and 3 of S102 and S103 mainly perform intelligent analysis on the heart sound source signal collected in step 1 of S101 and establish a model, including: pre-emphasis, framing, windowing, short time Fourier transform (Short time Fourier transform, STFT), Mel filtering (Mel-Frequency Cepstral Coefficients, MFCC), logarithmic operation, and discrete cosine transform, so as to obtain a personalized and accurate modeling of the cardiac valve opening sound signal HSv;

The so-called "heart sounds (Cardiac sounds)" are the sounds emitted during the working process of the heart. The heart is a muscular cavity organ composed of cardiomyocytes, with a valve structure and a special conduction system. In life activities, the heart contracts and relaxes rhythmically all the time. During relaxation, it receives venous return blood, and during contraction, it injects blood into arteries. The valve functions as a valve to control the unidirectional flow of blood flow. The heart has 4 valves. There is an atnoventricular valve (AV valve) at the junction of the atrium and the ventricle. The one on the left is called the bicuspid valve or the mitral valve, and the one on the right is called the mitral valve. For the tricuspid valve (tricuspid valve). When the ventricle contracts, the pressure difference between the ventricle and the atrium will cause the atrioventricular valve to close, preventing blood flow There is a semilunar valve between the ventricle and the artery, the aortic valve between the left ventricle and the base of the aorta, and the pulmonary valve between the right ventricle and the base of the pulmonary artery. pulmonary valve). When the ventricle contracts, the semilunar valve is forced to open so that blood can enter the systemic and pulmonary circulation. When the ventricle dilates, the pressure in the ventricle is lower than that in the artery. To prevent the arterial blood from flowing back into the ventricle, the semilunar valve closes quickly.

In the cardiac cycle, the relationship between pressure, valve, blood flow direction, ventricular volume and heart sound, cardiac electrical activity is the basis of rhythmic diastolic and systolic, the heart first produces potential changes, and then mechanical diastolic and systolic activities, resulting in atrium and ventricle Changes in pressure and volume, which drive blood flow, accompany the opening and closing of the valves, resulting in the appearance of heart sounds. The vibration frequency range of normal heart sounds is usually between 20Hz and 200Hz, and the frequency of heart murmurs generally does not exceed 800Hz, which are all within the hearing range of the human ear. That is, the frequency of the heart sound will probably fall between 20 and 800 Hz. First, use band-pass filtering to filter the received body sound of the patient in the frequency domain. , converted into nine frequency segments, namely 0-344 Hz, 344-689 Hz, 689-1033 Hz, 1033-1378 Hz, 1378-1722 Hz, 1722-2067 Hz, 2067-2411 Hz, 2411-2756 Hz, And 2756-3100Hz, and use the entire sound file for subsequent analysis.

Then analyze the 2-minute sound files every 0.25 seconds, mark the position of the heart sound by listening to the sound file, set the position of the heart sound as the benchmark and calculate the cosine similarity value. Set a threshold to distinguish between heart sounds and non-heart sounds, and then perform training. And according to Fisher Criterion (FisherCriterion), the dispersion of distribution between groups and within groups was calculated by the ratio of between-group and within-group variation. When the within-group gap is smaller and the between-group gap is larger, the higher the score, the greater the influence, and vice versa.

Through AI artificial intelligence and neural-like computing to help process the signal, the noise in the sound can be effectively removed, so that meaningful heart sounds can be detected, and an appropriate model can be established in the analysis and extraction of effective events to achieve effective distinction. Classification, enabling to provide real-time and correct information on the physiological state of the heart's response.

S104 Step 4. Add the personalized and precisely modeled cardiac valve opening sound signal HSv to the database;

S105, step 5. Through the basic application program, perform model comparison on the heart sound source signal collected by the monitoring module 11 in steps 1, 2, and 3 of S101, S102, and S103, and;

S106 Step 6. When the match between the heart sound source signal collected by the monitoring module 11 and the personalized and accurately modeled cardiac valve opening sound signal HSv is greater than 90% in S105 Step 5, go to S107 Step 7. The control unit 21 of the counterpulsation system 20 starts to apply pressure to the patient; and starts to release pressure to the patient in the late period of diastole, so as to adjust and improve blood circulation with effective counterpulsation pressure.

Compared with the prior art, the present invention creates a precise heart sound control external counterpulsation system 100 and an application method thereof, which can utilize the effective design of the heart sound detector 10 to provide patients with the convenience of wearing and sticking on the chest to obtain personalized and precise modeling. The heart valve opening sound signal HSv, the operation is very simple and can be free of wiring, which effectively overcomes the tedious operation of using the heart guide patch and connecting line when the traditional external counterpulsation detects the ECG, and at the same time can detect the heart sound based on The personalized and accurately modeled cardiac valve opening sound signal HSv obtained by the device 10 is used to accurately control the timing when the patient's cardiac valve has opened and blood is about to flow out, so that the heart is truly in the diastole of blood outflow. At the end of the period, the control unit 21 starts to apply pressure to the patient; in the late period of diastole, the pressure is released to the patient; therefore, the external counterpulsation system 20 can be optimally controlled for pressure operation to ensure safety, and greatly increase the adjustment and improvement of counterpulsation therapy. The effect of blood circulation.

To sum up, the novel and practical creation of this invention fully complies with the patent requirements, and a new type patent application is filed. However, the above are only the preferred embodiments of this creation, and should not limit the scope of implementation of this creation; therefore, any equivalent changes and modifications made in accordance with the scope of the patent application for this creation and the content of the creation description should be are covered by this creative patent.

100: Accurate Heart Sound Control External Counterpulsation System 10: Heart Sound Detector 11:Monitoring module 110: Heart guide patch 12: Miniature Microphone 13: Microcomputer circuit 131: Preamplifier 132: Filter Amplifier 133: A/D Linear-to-Digital Converter 141: Signal processing unit 142: Signal Analysis Unit 15: Display module 150: Luminous display part 151: Cloth 152: Flexible LED unit 20: External Counterpulsation System 21: Control unit 22: Pressurizing device 23: Pulse pressure belt 30: Communication power supply unit 31: Wireless communication circuit 32: Rechargeable battery 50: Electronics 51: Display screen 52: APP application HSv: cardiac valve opening sound signal S101, S102, S103, S104, S105, S106, S107: Steps

Figure 1 is a schematic diagram of the configuration of the authoring system. Figure 2 is a schematic diagram of the application of the authoring system. Figure 3 is a block diagram of the heart sound detector created by the present invention. Figure 4 is a schematic diagram of the composition of the heart sound detector created by the present invention. Fig. 5 is the application flow chart of this authoring system. FIG. 6 is a schematic diagram of the application of a conventional external counterpulsation system.

100: Accurate Heart Sound Control External Counterpulsation System

10: Heart Sound Detector

11:Monitoring module

12: Miniature Microphone

13: Microcomputer circuit

131: Preamplifier

132: Filter Amplifier

133: A/D Linear-to-Digital Converter

141: Signal processing unit

142: Signal Analysis Unit

20: External Counterpulsation System

21: Control unit

22: Pressurizing device

23: Pulse pressure belt

Claims (6)

A precise heart sound control external counterpulsation system mainly includes: a heart sound detector and an external counterpulsation system; wherein the heart sound detector has at least a monitoring module, and the monitoring module is provided with a miniature microphone to connect a microcomputer circuit, the microcomputer circuit has at least a preamplifier, a filter amplifier, and an A/D linear-to-digital converter to process the heart sound source signal of the patient captured by the micro microphone; a signal processing unit is built in the microcomputer circuit , using AI artificial intelligence and neural-like operations to analyze the heart sound source signal to extract effective heart sound event signals, and; a signal analysis unit is built in the microcomputer circuit to model the effective heart sound event signals and build The model reference is taken from two data, one is the empirical data of the large number of heart sounds, and the other is the patient's own heart sound evidence data, so that the sound signal of the opening of the cardiac valve can be obtained with personalized and accurate modeling, and the confirmation is immediately followed by The diastolic phase of cardiac blood outflow, and; the external counterpulsation system is provided with a control unit to control a pressurizing device and a plurality of pulse pressure belts connected thereto, the control unit is connected to the heart sound detector for information transmission, according to the The personalized and accurately modeled cardiac valve opening sound signal obtained by the heart sound detector confirms that it is the diastolic period when the blood flows out of the heart, and the control unit starts to apply pressure to the patient; Adjust and improve blood circulation with effective counterpulsation pressure. The external counterpulsation system for precise heart sound control according to claim 1, wherein the heart sound detector is further provided with a display module, and the display module is provided with a light-emitting display portion externally. The external counterpulsation system for precise heart sound control according to claim 2, wherein the light-emitting display part is further composed of a soft light-emitting display screen, and has a cloth piece directly on which is provided with a soft LED unit for connecting to the monitoring module. The precise heart sound control external counterpulsation system according to claim 2, wherein the monitoring module is further provided with Bluetooth wireless transmission, so that the display content of the display module can be wirelessly shared and displayed on a display screen of an electronic device. The external counterpulsation system for precise heart sound control according to claim 2, wherein the monitoring module is further provided with a movably connected communication power supply unit, which has a wireless communication circuit and a rechargeable battery for supplying power to the microcomputer circuit , transmit the collected and processed heart sound data to the control unit and an electronic device with an APP application program through the wireless communication circuit, and the content corresponds to the display module and the monitoring module. The precise heart sound-controlled external counterpulsation system as claimed in claim 1, wherein the heart sound detector is further assembled and electrically connected to a disposable cardiac conduction patch, so that the microcomputer circuit can simultaneously receive the patient's heartbeat. The electrical signal is detected, and the patient's PQRST complex is detected accordingly.

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