CN100512749C - Automatic interpretation device for damaged condition of heart valve - Google Patents

Abstract

An automatic interpretation device for the damaged condition of a heart valve, in particular to an interpretation device for judging the damaged condition of the heart valve of a patient. The automatic interpretation device for the damaged condition of the heart valve comprises: a heart sound microphone for recording heart sound signals of the heart; a signal processing system connected to the heart sound microphone for separating the extracted heart sound signal into four heart valve signals, generating a system transfer function by the separated heart valve signals through a convolution method, and comparing the function with a reference database, thereby obtaining the damaged condition of the heart valve; and a display connected to the signal processing system for displaying the result of the signal processing system to show the damaged status of the heart valve. The automatic interpretation device for the damaged condition of the heart valve can automatically interpret the damaged condition of the heart valve, and can improve the quality and convenience of medical treatment.

Description

Automatic interpretation device for heart valve damage

technical field

The invention relates to an automatic judgment device for the damage of the heart valve, in particular to an automatic judgment device for judging the damage of the heart valve of a patient.

Background technique

The heart is one of the most important organs in the human body. It operates all the time. As long as there is a slight problem with the heart, it will have a great impact on human health. Moreover, the whole heart is a very complicated system. It is necessary to clearly describe its The system is not easy, therefore, heart sound is still the most commonly used method for doctors to diagnose heart conditions in clinical practice.

The beating of the heart causes the flow and circulation of blood. During the beating period, there will be changes in tissue shape and fluid mechanics. The sound of these changes can be heard through a stethoscope, which is called heart sound, and heart murmurs are mainly caused by blood. caused by turbulence. According to the time of occurrence, it can be divided into systolic, diastolic and continuous phases. According to the diagnostic location, it can be divided into aortic valve, pulmonary valve, tricuspid valve and mitral valve. The valve is like a door, allowing blood to flow in a certain direction. For example, the aortic valve is between the left ventricle and the aortic valve and controls the blood supply to the whole body. There will be a pressure difference between the arteries, and the narrower the valve, the greater the pressure, and systolic heart murmurs can be found during auscultation.

The heart sound can be divided into the first heart sound, the second heart sound, the third heart sound and the fourth heart sound. The first heart sound occurs in the early stage of systole and includes two components, which are respectively composed of the mitral valve and the tricuspid valve. caused. The second heart sound occurs at the end of systole and also includes two components, respectively caused by the aortic valve and pulmonary valve. The third heart sound occurs in the early diastole, and the fourth heart sound occurs in the late diastole. Among them, the first heart sound and the second heart sound are the sounds produced by the closure of cardiovascular valves, which are easy to be observed, while the third heart sound and the fourth heart sound are less obvious, which makes it difficult to be observed. Abnormal sounds other than these four heart sounds are considered heart murmurs. These heart murmurs represent signs of heart disease, including broken compartments, valve stenosis, valvular insufficiency, tricuspid valve prolapse, valve cracks or Other structural defects, etc.

It can be seen that heart sound diagnosis is an important procedure for doctors to judge the condition of the heart. Therefore, a series of stethoscopes have been developed to assist doctors in judging the condition of the heart. For example, the US Patent No. 20030072457 patent "electronic stethoscope" is provided An electronic stethoscope, the electronic stethoscope can provide three operation modes, the first operation mode only filters out the physiological activity sound of the heart, the second operation mode only filters out the physiological activity sound of the lungs, and the third operation mode The normal and abnormal heart sounds are amplified in different proportions to strengthen the observation of abnormal heart sounds, but this electronic stethoscope cannot automatically assist in the analysis of heart valve damage.

Another example is U.S. Patent No. 4619268, "Stethoscope and Life Support Monitoring System", which provides a stethoscope and life support monitoring system. The system can distinguish the sound of heartbeat and lung breathing, and then calculate the frequency of heartbeat and lung breathing respectively. It is used to monitor the vital signs of patients, but the stethoscope and life support monitoring system still cannot automatically assist in the analysis of damaged heart valves.

The above-mentioned existing technologies cannot automatically assist in the analysis of heart valve damage. The interpretation of heart sounds is still based on the doctor's subjective auditory judgment, which is easily interfered by the surrounding environment and human factors, such as the doctor's age, hearing sensitivity and Affected by the degree of training of auscultation skills, etc., it leads to the failure to correctly interpret the damage of the heart valve.

In view of the deficiencies in the prior art, the inventor desperately wants to improve and innovate, so as to improve the above-mentioned deficiencies.

Contents of the invention

The main purpose of the present invention is to provide an automatic interpretation device for the damage of the heart valve, which is used to judge the damage of the heart valve of the patient. The automatic interpretation method for the damage of the heart valve can automatically interpret the damage of the heart valve. It can improve the quality and convenience of medical treatment.

In order to achieve the above object, the present invention provides an automatic judgment device for heart valve damage, including a reference database for storing a large amount of clinically accumulated data on heart valve damage and the relationship between heart sounds, and then using a heart sound microphone To record the heart sound signal of the heart, and then use a separation heart sound signal unit to record the heart sound signal of the heart from the heart sound microphone, and use the timing characteristics of the heart sound signal and related technologies to separate it into the aortic valve, pulmonary valve, tricuspid valve and mitral valve of the heart The four heart sound signals of the heart valve further include a heart sound signal digital processing unit for processing the heart sound signals of the heart valve obtained by separating the heart sound signal unit into sampling signals.

The automatic judgment device for heart valve damage also includes a convolution method computing unit, which is used to use the convolution method to generate the system transfer function by using the heart sound sampling signal of the heart valve generated by the heart sound signal digital processing unit, and then includes There is a comparison operation unit, which is used to compare the system transfer function obtained by the convolution method operation unit with the established reference database, so as to know the damage of the four heart valves, and a display, which is used to display the comparison The result of the arithmetic unit is used to display the damage of the heart valve.

Description of drawings

Fig. 1 is the flow chart of the automatic interpretation method of heart valve damaged situation of the present invention;

Fig. 2 is the block diagram of the automatic interpretation device of the heart valve damage situation of the present invention;

Fig. 3A is a position map of the aortic valve, pulmonary valve, tricuspid valve and mitral valve in the cardiac system;

FIG. 3B is a schematic diagram of heart sound signal measurement locations of the present invention.

Description of main component symbols:

30 heart sound microphone

32 Separate heart sound signal unit

34 Heart sound signal digital processing unit

36 Convolution operation unit

38 comparison operation unit

40 Reference library

42 monitors

44 Signal processing system

50, 58 Pulmonary valve

52, 60 Aortic valve

54, 62 Tricuspid valve

56, 64 mitral flap

Detailed ways

Please refer to FIG. 1 , which is an automatic interpretation method for heart valve damage according to the present invention. The steps of the method for automatically judging heart valve damage include pre-establishing a reference database S100, establishing a reference database with a large amount of clinically accumulated data on heart valve damage and the relationship between heart sounds. Next, capture the heart sound signal S102, and use the heart sound microphone to record the heart sound signal of the heart. Three or more heart sound microphones can be used to record the heart sound signal near the heart at the same time, or the aortic valve, pulmonary valve, tricuspid Measured at the valve or mitral valve. Then, separate the heart sound signals into heart sound signals of four heart valves S104, and separate the heart sound signals recorded by the heart sound microphone into the aortic valve, pulmonary valve, tricuspid valve and mitral valve using time series characteristics and related technologies The four heart sound signals. One of its implementation methods is that the heart sound signal measured from the pulmonary valve minus the heart sound signal measured from the aortic valve, the heart sound signal measured from the aortic valve minus the heart sound signal measured from the pulmonary valve, and the heart sound signal measured from the tricuspid valve The heart sound signal obtained from the mitral valve minus the heart sound signal obtained from the mitral valve and the heart sound signal obtained from the mitral valve minus the heart sound signal obtained from the tricuspid valve, but it can also be done in other ways.

Then digitally process the heart sound signal into a sampling signal S106, digitally process the separated heart sound signal of the heart valve into a sampling signal, and then include the step of generating a system transfer function S108 by using the convolution method, which means using the convolution method The convolution method calculates the heart sound sampling signal of the heart valve to generate the system transfer function, wherein the generation of the system transfer function is obtained by using the impulse response to obtain the system transfer function. The heart system transfer function can be calculated by inputting a pulse signal and the heart sound signal obtained by the heart sound microphone, and using the convolution method to calculate the system transfer function. Finally, the system transfer functions of the four heart valves are compared with the established reference database S110 to verify and judge the damage of the four heart valves.

Please refer to FIG. 2 , which is an automatic detection device for heart valve damage according to the present invention. The automatic judgment device of the damage situation of the heart valve includes a heart sound microphone 30, which is used to record the heart sound signal of the heart, and three or more heart sound microphones 30 can also be used to record the heart sound signal near the heart at the same time, or can separately record the heart sound signal from the heart Measured at the aortic, pulmonary, tricuspid or mitral valves. Figure 3A shows the positions of the aortic valve 52, pulmonary valve 50, tricuspid valve 54 and mitral valve 56 of the heart, and Figure 3B shows that in the human body, the aortic valve 60, pulmonary valve 58, Location of heart sound signals at tricuspid valve 62 and mitral valve 64 .

Then include a signal processing system 44, the signal processing system 44 is connected to the heart sound microphone 30, and is used for signal processing and system transfer function calculation and comparison of the heart sound signals of the heart valve obtained from three or more heart sound microphones 30. right. Wherein, the signal processing system 44 includes a reference database 40 for storing a large amount of clinically accumulated data on the relationship between heart valve damage and heart sounds; a separate heart sound signal unit 32 is connected to the heart sound microphone 30 for Separation of heart sound signals recorded by three or more heart sound microphones 30 into heart sound signals of heart valves refers to the separation of heart sound signals into aortic valve, pulmonary valve, and tricuspid valve using the characteristics of the timing of heart sound signals and related technologies. and the four heart sounds from the mitral valve.

The heart sound signal of the heart valve can be the heart sound signal measured by the pulmonary valve minus the heart sound signal measured by the aortic valve, the heart sound signal measured by the aortic valve minus the heart sound signal measured by the pulmonary valve, and the heart sound signal measured by the tricuspid valve The measured heart sound signal minus the heart sound signal measured from the mitral valve and the heart sound signal measured from the mitral valve minus the heart sound signal measured from the tricuspid valve are formed, or obtained by other calculation methods.

An automatic judgment device for heart valve damage in the present invention further includes a heart sound signal digital processing unit 34 connected to the separation heart sound signal unit 32 for processing the heart sound signal of the heart valve obtained from the separation heart sound signal unit 32 into The sampling signal is then connected to the heart sound signal digital processing unit 34 by using a convolution method operation unit 36 to generate the system transfer function by using the convolution method to generate the heart sound sample signal of the heart valve generated by the heart sound signal digital processing unit 34. Finally, a comparison operation unit 38 is used to connect to the convolution method operation unit 36 and the reference database 40 for the system transfer functions of the four heart valves obtained by the convolution method operation unit 36 and the established reference materials Libraries 40 are compared separately, through the rich contents of the reference database 40, to automatically judge the damage of the four heart valves, and a display 42, connected to the comparison operation unit 38, for displaying the results of the signal processing system 44 , to show damage to the four heart valves.

To sum up, the present invention is really a rare invention and creation product, which has great industrial practicability, novelty and progress, and fully meets the requirements for invention patent application, so please file an application in accordance with the law.

However, the above description is only a preferred feasible embodiment of the present invention, and does not limit the patent scope of the present invention. Therefore, any changes or modifications implemented by those familiar with the art in the field of the present invention are all covered by the present invention. Within the scope of the patent in this case, I agree with Chen Ming.

Claims (7)

1, the automatic interpretation device of the impaired situation of a kind of cardiac valve is characterized in that, this automatic interpretation device includes:

One hear sounds mike is used for enrolling the hear sounds signal of heart;

One signal processing apparatus, be connected in this hear sounds mike, the hear sounds signal that extracts is separated into four cardiac valve signals, isolating cardiac valve signal is produced system's transfer function by revolving long-pending method, and this function and consulting database compared, thereby draw the impaired situation of cardiac valve; And

One display is connected in this signal processing apparatus, in order to show the result of this signal processing apparatus, to show the impaired situation of cardiac valve.

2, the automatic interpretation device of the impaired situation of cardiac valve as claimed in claim 1 is characterized in that, wherein this hear sounds mike is more than three or three.

3, the automatic interpretation device of the impaired situation of cardiac valve as claimed in claim 1 is characterized in that, wherein this signal processing apparatus includes:

One consulting database is in order to store the data that concerns between impaired situation of cumulative clinically a large amount of cardiac valve and hear sounds;

One separates hear sounds signal unit, be connected in this hear sounds mike, in order to will utilize the characteristic of hear sounds signal sequential and aortic valve, valve of pulmonary trunk, Tricuspid valve and mitral four hear sounds signals that correlation technique is separated into heart from the hear sounds signal of this hear sounds mike admission;

Wholeheartedly message count word processing unit is connected in this separation hear sounds signal unit, is processed into sample signal in order to will separate this valvular hear sounds signal of obtaining hear sounds signal unit;

One revolves long-pending method arithmetic element, is connected in this hear sounds signal digital processing element, in order to this valvular hear sounds sample signal that this hear sounds signal digital processing element is produced, utilizes and revolves long-pending method computing, to produce system's transfer function; And

One comparison calculation unit, be connected in this and revolve long-pending method arithmetic element and this consulting database, compare respectively in order to four valvular these system's transfer functions and this consulting database of this being revolved long-pending method arithmetic element gained, to learn four situations that cardiac valve is impaired.

4, the automatic interpretation device of the impaired situation of cardiac valve as claimed in claim 3, it is characterized in that, wherein should separate hear sounds signal unit, the hear sounds signal that the hear sounds signal that the hear sounds signal that is got by the valve of pulmonary trunk amount subtracts the hear sounds signal that got by the aortic valve amount, got by the aortic valve amount subtracts the hear sounds signal that got by the valve of pulmonary trunk amount, got by the Tricuspid valve amount subtracts the hear sounds signal that is got by the Mitral valve amount and subtracts the hear sounds signal that is got by the Tricuspid valve amount by the hear sounds signal that the Mitral valve amount gets and constitutes.

5, the automatic interpretation device of the impaired situation of a kind of cardiac valve is characterized in that, this automatic interpretation device includes:

One consulting database is in order to store the data that concerns between impaired situation of cumulative clinically a large amount of cardiac valve and hear sounds;

One hear sounds mike is used for enrolling the hear sounds signal of heart;

One separates hear sounds signal unit, be connected in this hear sounds mike, in order to utilizing the characteristic and the correlation technique of hear sounds signal sequential, be separated into aortic valve, valve of pulmonary trunk, Tricuspid valve and mitral four hear sounds signals of heart from the hear sounds signal of the heart of this hear sounds mike admission;

Wholeheartedly message count word processing unit is connected in this separation hear sounds signal unit, is processed into sample signal in order to will separate this valvular hear sounds signal of obtaining hear sounds signal unit;

One revolves long-pending method arithmetic element, is connected in this hear sounds signal digital processing element, revolves long-pending method computing in order to this valvular hear sounds sample signal utilization that this hear sounds signal digital processing element is produced, to produce system's transfer function;

One comparison calculation unit, be connected in this and revolve long-pending method arithmetic element and this consulting database, compare respectively in order to four valvular these system's transfer functions and this consulting database of this being revolved long-pending method arithmetic element gained, to learn four situations that cardiac valve is impaired; And

One display is connected in this comparison calculation unit, in order to show the unitary result of comparison calculation, to show the impaired situation of cardiac valve.

6, the automatic interpretation device of the impaired situation of cardiac valve as claimed in claim 5 is characterized in that, wherein this hear sounds mike is more than three or three.

7, the automatic interpretation device of the impaired situation of cardiac valve as claimed in claim 5, it is characterized in that, wherein should separate hear sounds signal unit, the hear sounds signal that the hear sounds signal that the hear sounds signal that is got by the valve of pulmonary trunk amount subtracts the hear sounds signal that got by the aortic valve amount, got by the aortic valve amount subtracts the hear sounds signal that got by the valve of pulmonary trunk amount, got by the Tricuspid valve amount subtracts the hear sounds signal that is got by the Mitral valve amount and subtracts the hear sounds signal that is got by the Tricuspid valve amount by the hear sounds signal that the Mitral valve amount gets and constitutes.

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