TWM551909U - Apparatus for detecting atrial fibrillation - Google Patents

Abstract

An apparatus for detecting atrial fibrillation which is in the arm is decompression, mean blood pressure or fixed pressure state, to detect a pulse signal to obtain a time pulse waveform and converting it to an energy spectrum waveform via Fast Fourier Transform. The energy spectrum waveform includes a first frequency region, a second frequency region, and a third frequency region. The number of spikes in each frequency region was calculated and the heart indexes of the first, second, and third frequency regions were obtained, which were the first heart index, the second heart index, and the third heart index. And by the sum of the three heart index values and the first heart index to determine the possibility of atrial fibrillation, whereby the user can determine the possibility and predicting atrial fibrillation by simple measurement of blood pressure at home.

Description

Device for judging atrial fibrillation

This creation relates to a device, and more particularly to a device for determining atrial fibrillation.

Atrial fibrillation (Af) is a clinically common arrhythmia disorder, and the incidence increases linearly with age. In patients with atrial fibrillation, the risk of stroke is 4 to 5 times higher than that of the average person. The diagnosis of arrhythmia is currently the most common with 12-lead electrocardiogram and dynamic electrocardiogram. The episode of arrhythmia can be recorded in the electrocardiogram examination, and then the type and severity of arrhythmia can be judged. Therefore, most of the records can be diagnosed by using the ECG record. A case of atrial fibrillation. However, the electrocardiogram needs to be carried out in a professional medical institution, and it requires a professional doctor to interpret it. It cannot be easily operated by the user in the home environment alone, and the inconvenience is high.

In order to solve the above problems, one of the purposes of the present invention is to provide a device for judging atrial fibrillation. The user can judge and pre-diagnose the possibility of atrial fibrillation by simply measuring blood pressure at home, once pre-diagnosis of atrial fibrillation If the possibility occurs, the patient can be diagnosed and treated by a professional physician in the hospital to effectively reduce the risk of stroke caused by atrial fibrillation.

In order to achieve the above object, the device for determining atrial fibrillation according to an embodiment of the present invention comprises: a pressure pulse band for blood pressure measurement surrounding one arm of a subject, for inflating and pressing the arm portion to sense one Pulse signal; a device body has a built-in sensor, the device body is connected with a trachea of the cuff, and can control the operation mode of the cuff to obtain a corresponding pulse wave signal; a first module and the device body electrical Connecting, obtaining a time-pulse diagram of the pulse signal of the subject during a period; a second module is electrically connected to the apparatus body, and converting the time-pulse map into an energy spectrum by a fast Fourier transform, wherein The energy spectrum diagram includes at least three frequency regions, which are a first frequency region, a second frequency region, and a third frequency region, each having a dominant frequency amplitude, a first frequency region, a second frequency region, and a first frequency region. The main frequency amplitudes in the three frequency regions are respectively the first main frequency amplitude, the second main frequency amplitude and the third main frequency amplitude; a third module is electrically connected to the device body, and the genus in each frequency region is calculated. The number of spikes of the noise, and the number of spikes in each frequency region is defined as a heart index of the frequency region, and the cardiac indices of the first frequency region, the second frequency region, and the third frequency region are respectively the first cardiac index a second heart index and a third heart index, wherein the noise in each frequency region is determined by multiplying the intensity of the dominant frequency amplitude of the frequency region by a proportional coefficient as a reference value; and displaying a corresponding three of the display modules The three cardiac indices in the frequency region determine whether atrial fibrillation is possible by the sum of the first cardiac index, the second cardiac index, and the third cardiac index, and the value of the first cardiac index.

10‧‧‧A device for judging atrial fibrillation

12‧‧‧Curve belt

121‧‧‧ trachea

14‧‧‧ device body

16‧‧‧Shell

18‧‧‧Power switch button

20‧‧‧Start measurement button

22‧‧‧ function keys

221‧‧‧Set button

222‧‧‧right selection button

223‧‧‧Left selection button

24‧‧‧ first module

26‧‧‧ second module

28‧‧‧ third module

30‧‧‧Display module

32‧‧‧ Pulse Signal

34, 34’, 34” ‧ ‧ pressure line

F1‧‧‧First frequency region

F2‧‧‧second frequency region

F3‧‧‧ third frequency region

A1‧‧‧first dominant frequency amplitude

A2‧‧‧second frequency amplitude

A3‧‧‧ third dominant frequency amplitude

I1‧‧‧First Heart Index

I2‧‧‧Second Heart Index

I3‧‧‧ Third Heart Index

40‧‧‧ portable device

401‧‧‧ screen

SBP‧‧‧Systolic pressure

DBP‧‧‧ diastolic pressure

P‧‧‧ heartbeat

FIG. 1 is a schematic view showing the structure of an apparatus for determining atrial fibrillation according to an embodiment of the present invention.

FIG. 2a is a time-pulse diagram of a device for determining atrial fibrillation according to an embodiment of the present invention, which is measured in a first measurement mode for a subject who does not generally have arrhythmia disease, and FIG. 2b shows FIG. 2a. The energy spectrum map corresponding to the pulse signal shown.

FIG. 3a is a time-pulse diagram of a device capable of determining atrial fibrillation in a first measurement mode for a subject who may have atrial fibrillation, and FIG. 3b is a view of FIG. The energy spectrum map corresponding to the pulse signal.

FIG. 4a is a time-pulse diagram of a device for determining atrial fibrillation according to an embodiment of the present invention, which is measured in a second measurement mode for a subject who does not generally have arrhythmia disease, and FIG. 4b shows FIG. 4a. The energy spectrum map corresponding to the pulse signal shown.

FIG. 5a is a time-pulse diagram of a device capable of determining atrial fibrillation according to an embodiment of the present invention, which may be measured in a second measurement mode for a subject who may have atrial fibrillation, and FIG. 5b is a view of FIG. 5a. The energy spectrum map corresponding to the pulse signal shown.

FIG. 6a is a time-pulse diagram of a device for determining atrial fibrillation according to an embodiment of the present invention, which is measured in a third measurement mode for a subject who does not generally have arrhythmia disease, and FIG. 6b shows FIG. 6a. The energy spectrum map corresponding to the pulse signal shown.

FIG. 7a is a time-pulse diagram of a device capable of determining atrial fibrillation according to an embodiment of the present invention for measuring a subject with atrial fibrillation in a third measurement mode, and FIG. 7b is a view of FIG. 7a. The energy spectrum map corresponding to the pulse signal shown.

FIG. 8 is a schematic view showing the application of the device for determining atrial fibrillation according to an embodiment of the present invention.

FIG. 9a and FIG. 9b are schematic diagrams showing the display of the display module of the device for determining atrial fibrillation according to an embodiment of the present invention.

1 is a schematic view showing the structure of a device for determining atrial fibrillation according to an embodiment of the present invention. As shown in the figure, the device 10 for determining atrial fibrillation includes a cuff 12 for blood pressure measurement for surrounding a subject. The arm of the tester, and with the change of the blood vessel pressure of the arm, the pressure pulse band is accompanied by the pressure change of the induction; a device body 14 is connected with the air tube 121 of the cuff 12 and controls the pressure band 12 In operation, the device body 14 includes a casing 16 . The upper surface of the casing 16 is provided with a power switch button 18 , a start measuring button 20 and a plurality of function keys 22 , and the casing 16 is provided with one or several control chips ( FIG. The control wafer includes a sensor for sensing a pressure fluctuation caused by a change in vascular pressure of the cuff 12 through the trachea 121 to obtain a pulse signal.

A first module 24 obtains a time pulse map of the pulse signal of the subject during a period; a second module 26 converts the time pulse map into an energy spectrum by a fast Fourier transform, wherein the energy The spectrum diagram includes at least three frequency regions, which are a first frequency region F1, a second frequency region F2, and a third frequency region F3. In an embodiment, the first frequency region F1 is the first frequency of the heartbeat frequency. In the region of ±0.5 octave interval, the second frequency region F2 is the region of the second dominant frequency ±0.5 octave interval of the heartbeat frequency, and the third frequency region F3 is the region of the third dominant frequency ±0.5 octave interval of the heartbeat frequency, for example, one person The heartbeat frequency is 60 beats/min, the first frequency region is 30-90 beats/min, the second frequency region is 90-150 beats/min, and the third frequency region is 150-210 beats/min.

Following the above description, each frequency region has a dominant frequency amplitude, for example, the first frequency region A1, the second frequency region F2, and the third frequency region F3 respectively have a first dominant frequency amplitude A1 and a second primary frequency. The amplitude A2 and a third dominant frequency amplitude A3; a third module 28 calculates the number of spikes belonging to the noise in each frequency region, and defines the number of spikes in each frequency region as a heart of the frequency region The index, for example, the heart index of the first frequency region F1, the second frequency region F2, and the third frequency region F3, respectively The first cardiac index I1, the second cardiac index I2, and the third cardiac index I3, wherein the noise in each frequency region is determined by multiplying the intensity of the dominant frequency amplitude of the frequency region by a proportional coefficient as a reference value; And a display module 30 displays the first cardiac index I1, the second cardiac index I2, and the third cardiac index I3 to determine whether the sum of the first cardiac index I1, the second cardiac index I2, and the third cardiac index I3 is greater than or A value equal to a first standard value and a value of the first heart index I1 is greater than or equal to a second standard value to determine whether it is likely to be atrial fibrillation. In an embodiment, if the scale factor is 1/20, then 5 is used as the first standard value, and 2 is used as the second standard value, but is not limited thereto, and may be changed according to the parameters of the Fourier transform.

In the present invention, the first cardiac index I1, the second cardiac index I2, and the third cardiac index I3 may be artificially added; or the device 10 for determining atrial fibrillation may optionally include a fourth module 36. The first heart index I1, the second heart index I2, and the third heart index I3 are added to obtain a judgment index, and the judgment index is displayed on the display module 30. Further, when the judgment index is between 0 and the first standard value, an alert symbol 38 may be displayed on the display module 30, and when the judgment index is greater than or equal to the first standard value and the first cardiac index I1 is greater than or When the second standard value is equal, the warning symbol 38 may flash to emphasize the possibility of atrial fibrillation; on the other hand, the device 10 for determining atrial fibrillation may also include a buzzer to alert by the prompt of the sound. effect. In one embodiment, the apparatus 10 for determining atrial fibrillation can have three measurement modes built in. By operating the function keys 22, the user can select a measurement mode.

In a first measurement mode, after the cuff 12 is inflated and pressurized to a maximum pressure, the decompression and decompression are performed in a first period; the first module 24 obtains the subject in the first period. The pulse wave signal 32, shown in Fig. 2a, is a time-pulse diagram of the subject generally measured without the arrhythmia disease measured under the condition of decompression of the cuff, and Fig. 3a shows the cuff in the cuff. The measured value in the state of decompression may have a time pulse map of the subject with atrial fibrillation, wherein the horizontal axis represents time and the left vertical axis represents pressure. The force is expressed in millimeters of mercury (mmHg), and the right vertical axis represents the Pulse Amplitude. In Figures 2a and 3a, in addition to the pulse signal 32, the arm is also indicated with the cuff 12 The contact is becoming looser under pressure, as indicated by pressure line 34". In one embodiment, the decompression rate of the cuff 12 may be 2 to 7 mm Hg per second.

Following the above description, FIG. 2b and FIG. 3b respectively show energy spectrum diagrams corresponding to the pulse wave signals shown in FIG. 2a and FIG. 3a, wherein the horizontal axis represents frequency and the vertical axis represents energy index (amplitude). In the energy spectrum diagram converted by the second module to the time-pulse map via the fast Fourier, the first frequency region F1, the second frequency region F2, and the third frequency region F3 are mainly included, and the proportional coefficient is 1/20. For example, the first standard value is 5 and the second standard value is 2, please refer to FIG. 2b for further, the first heart index I1 and the second heart index I2 of the subject who generally have no arrhythmia disease and The third cardiac index I3 is 0; respectively, and in the cardiac spectrum diagram shown in FIG. 3b, the first cardiac index I1 is 2, the second cardiac index I2 is 3, and the third cardiac index I3 is 0. At this time, I1+I2 +I3≧5 and I1≧2, so it is judged that it may be atrial fibrillation.

In a second measurement mode, the cuff 12 is inflated and pressurized to a maximum pressure to compress the blood vessels of the brachial artery of the arm to stop the blood flow, and the sensor is used in the process of slowly decompressing the cuff 12 The vascular pressure fluctuation caused by heart beat was measured to calculate a systolic blood pressure (SBP) and a diastolic blood pressure (DBP). The mean blood pressure (BPav) was calculated by systolic blood pressure and diastolic blood pressure, and the formula was BPav=1/3. SBP+2/3. DBP, and again pressurizes the cuff to a fixed pressure of blood pressure mean for a second period, the second module 26 obtains the pulse signal of the second period, and the sensor detects the change of the blood pressure during the second period The time waveform of the presentation is shown in Figure 4a or as shown in Figure 5a, which also indicates that the arm is at a fixed pressure of the mean blood pressure provided by the cuff 12, as indicated by the pressure line 34'.

Following the above description, FIGS. 4b and 5b are energy spectrum diagrams of the pulse wave signals 32 shown in FIGS. 4a and 5a, respectively, in which the horizontal axis represents frequency and the vertical axis represents energy index (amplitude). In the second module The energy spectrum map into which the time pulse map is converted by the fast Fourier transform mainly includes three frequency regions, which are a first frequency region F1, a second frequency region F2, and a third frequency region F3, with a proportional coefficient of 1/1. 20 is an example. At this time, the first standard value is 5, and the second standard value is 2. Please refer to FIG. 4b for further, the first heart index I1 and the second heart index I2 of the subject who generally have no arrhythmia disease. And the third cardiac index I3 is 0; respectively, and in the cardiac spectrum diagram shown in FIG. 5b, the first cardiac index I1 is 3, the second cardiac index I2 is 3, and the third cardiac index I3 is 0, at this time, I1+ I2+I3≧5 and I1≧2, so it is judged that it may be atrial fibrillation.

In a third measurement mode, the cuff 12 is contracted to provide the arm at a fixed pressure for a first period of time, and the fixed pressure can be selected from 50 mm Hg, 60 mm Hg, 70 mm Hg, or a value between the above millimeters of mercury, the first period may be a value of 15 seconds, 20 seconds, 25 seconds or between the above seconds. The first module 24 obtains a time pulse map of the pulse signal of the subject during the first period; the second module 26 converts the time pulse map into an energy spectrum map via a fast Fourier transform. FIG. 6a is a time-pulse diagram of a device 10 for determining atrial fibrillation according to an embodiment of the present invention, which is measured in a first measurement mode for a subject who does not generally have arrhythmia disease, and FIG. 7a shows For the time-pulse map measured by subjects who may have atrial fibrillation, in Figures 6a and 7a, the horizontal axis represents time and the left vertical axis represents the pressure provided by the current cuff 12 in millimeters of mercury. (mmHg), the right vertical axis represents the Pulse Amplitude. In Figures 6a and 7a, in addition to the pulse signal 32, the arm is also in the 70 mm of mercury provided by the cuff 12. The column is at a fixed pressure as indicated by pressure line 34.

Following the above description, FIG. 6b and FIG. 7b respectively show energy spectrum diagrams corresponding to the pulse wave signals shown in FIG. 6a and FIG. 7a. As shown in FIG. 6b and FIG. 7b, the horizontal axis of the energy spectrum diagram represents frequency, vertical. The axis represents the energy index (amplitude). In the second module 26, the pulse spectrum signal is converted into an energy spectrum by Fourier. The main frequency range includes the first frequency region F1, the second frequency region F2, and the third frequency region F3, and the proportional coefficient is 1/20. The first standard value is 5, and the second The standard value is 2, please refer to FIG. 6b. Generally, the first heart index I1, the second heart index I2, and the third heart index I3 of the subject who does not have arrhythmia disease are 0 respectively; In the heart spectrum diagram shown, the first cardiac index I1 is 4, the second cardiac index I2 is 2, and the third cardiac index I3 is 0. At this time, I1+I2+I3≧5 and I1≧2, so the judgment may be atrial Trembling.

The difference between the first, second and third measurement modes mentioned above mainly lies in the state in which the arm is in the state of deflation and decompression, the fixed blood pressure mean value or the preset fixed pressure during the measurement, as for the time pulse map The conversion, the analysis of the energy spectrum, the calculation of the number of spikes in the noise, and the definition of the heart index are substantially the same or substantially the same.

In the present invention, the first module 24, the second module 26, the third module 28, and/or the display module 30 can be integrated into a portable device 40, as shown in FIG. The device 40 can be a mobile phone, a tablet computer or a personal computer. The portable device 40 is communicatively connected to the device body 14. For example, the device body 14 can be connected by wire or wirelessly, for example, Bluetooth, low power consumption. Bluetooth (Bluetooth Low Energy, BLE), Wi-Fi or GPRS, etc., provides a computing function by the portable device 40, and draws a time pulse map and an energy spectrum on the display screen 401 of the portable device 40, wherein The display module 30 of the device body 14 itself can provide a rotation display of two kinds of pictures, such as the display of the general systolic pressure SBP, the diastolic pressure DBP and the heartbeat number P shown in FIG. 9a, and the first heart shown in FIG. 9b. Display of index I1, second heart index I2, and third heart index I3. The first module 24, the second module 26, and the third module 28 may also be integrated into the control chip inside the device body 14, if the device body 14 itself has high-order computing power and display functions. And displaying the time pulse wave pattern and the energy frequency by the display module 30 Spectrum. In an embodiment, one or both of the time pulse map and the energy spectrum map can be transmitted to the cloud server to provide remote display by the cloud database.

Following the above description, the first module 24, the second module 26, and the third module 28 may also be integrated into a cloud server, and the device body 14 uploads the measurement data to the cloud server for use in the cloud. The server provides calculations, analysis, and big data statistics, and displays the obtained heart index in the display module of the device body. In an embodiment, the time pulse map is converted into an energy spectrum map by a fast Fourier transform by a cloud server, and the heart index is calculated. By creating a time pulse map and/or energy spectrum map to the cloud server, and/or converting the energy spectrum map to the cloud server, the author can remotely read the complete pulse map and the medical staff. / or energy spectrum map, and truly achieve the purpose of remote care.

The above three measurement modes can be integrated into a control wafer inside a single device body 14, or can be built into different device bodies 14 respectively. The function key 22 shown in FIG. 5 can include a setting button 221, a right selection button 222 and a left selection button 223. The pressing of the setting button 221 can select a preset item, such as date and time, for the device body 14. The items such as the measurement mode, the fixed pressure, and the time interval of the first period/second period are assisted by the right selection button 222 and the left selection button 223. At the back of the device body 14, a power connection port (not shown) may be provided for connecting a power line, and an electronic device port (not shown) for external portable device.

According to the above, by means of the present invention for determining a device that may be atrial fibrillation, the user can determine the possibility of pre-diagnosis of atrial fibrillation by simply measuring blood pressure, blood oxygen or heart rate at home, once pre-diagnosis If there is a possibility of atrial fibrillation, the patient may be diagnosed and treated by a professional physician in the hospital to effectively reduce the risk of stroke caused by atrial fibrillation; On the one hand, uploading or storing measurement data in a portable device or a cloud database can further facilitate the implementation of remote care by data collection.

The embodiments described above are only for explaining the technical idea and characteristics of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and implement them according to the scope of the patent. That is, the equivalent changes or modifications made by the people in accordance with the spirit revealed by this creation should still be covered by the scope of the patent of this creation.

10‧‧‧ Blood pressure device for judging atrial fibrillation

12‧‧‧Curve belt

121‧‧‧ trachea

14‧‧‧ device body

16‧‧‧Shell

18‧‧‧Power switch button

20‧‧‧Start measurement button

22‧‧‧ function keys

221‧‧‧Set button

222‧‧‧right selection button

223‧‧‧Left selection button

24‧‧‧ first module

26‧‧‧ second module

28‧‧‧ third module

30‧‧‧Display module

36‧‧‧ fourth module

38‧‧‧ warning symbol

Claims (10)

A device for determining atrial fibrillation, comprising: a pressure pulse band for blood pressure measurement surrounding one arm of a subject, for inflating and pressing the arm portion to sense a pulse wave signal; a device, the device body is connected to a trachea of the cuff, and can control the operation mode of the cuff to obtain a corresponding pulse signal; a first module is electrically connected to the device body, Obtaining a time pulse map of the pulse signal of the subject during the period; a second module is electrically connected to the apparatus body, and converting the time pulse map into an energy spectrum map by using a fast Fourier transform, The energy spectrum diagram includes at least three frequency regions, respectively a first frequency region, a second frequency region, and a third frequency region, each of the frequency regions having a dominant frequency amplitude, the first frequency region The dominant frequency amplitudes in the second frequency region and the third frequency region are respectively a first dominant frequency amplitude, a second primary frequency amplitude, and a third primary frequency amplitude; a third module and the device body Electrical connection The number of spikes of noise in the frequency region, and defining the number of spikes in each frequency region as a heart index of the frequency region, the first frequency region, the second frequency region, and the third The heart index of the frequency region is a first heart index, a second heart index, and a third heart index, wherein the noise is in the first frequency region, the second frequency region, and the third frequency region. The determining unit multiplies the intensity of the first dominant frequency amplitude, the second primary frequency amplitude, and the third primary frequency amplitude by a proportional coefficient as a reference value; and a display module is electrically connected to the third module, Three of the cardiac indices in the three frequency regions are displayed to determine whether it is possible to be atrial fibrillation by the sum of the three cardiac indices and the value of the first cardiac index. The apparatus for determining atrial fibrillation according to claim 1, further comprising a fourth module electrically connected to the third module, adding all the cardiac indices to obtain a judgment index, wherein the judgment index is greater than Or equal to a first standard value, and the first cardiac index is greater than or equal to a second standard value, then the determination may be atrial fibrillation, wherein the determination of the first standard value, the second standard value, and the determination of the proportional coefficient Related. The device for determining atrial fibrillation according to claim 2, wherein the display module displays a warning symbol when it is determined that the atrial fibrillation is possible. The device for determining atrial fibrillation according to claim 1, wherein when the device body controls the operation of the cuff in a first mode, the cuff is first inflated and pressurized to a maximum pressure, the cuff The belt is deflated during a first period to obtain the pulse signal for the first period. The device for determining atrial fibrillation according to claim 1, wherein when the device body controls the operation of the cuff in a second mode, the cuff is first inflated and pressurized to a maximum pressure, the cuff The belt is deflated during a first period, and a systolic pressure and a diastolic pressure are calculated, and the systolic pressure is one-third of the systolic pressure plus two-thirds of the diastolic blood pressure as a blood pressure mean value, and then The cuff is inflated to a fixed pressure of the blood pressure mean for a second period of time to obtain the pulse signal of the second period. The device for determining atrial fibrillation according to claim 1, wherein when the device body controls the operation of the cuff in a third mode, the cuff is contracted to provide the arm at a constant pressure. a third period to obtain the pulse signal of the third period. The device for determining atrial fibrillation according to claim 6, wherein the fixed pressure is selected from the group consisting of 50 mmHg, 60 mmHg, 70 mmHg, or 40 mm Hg to 70 mm Hg The value between the bars. The apparatus for determining atrial fibrillation according to claim 1, wherein the first module, the second module, the third module, and/or the display module are integrated in a portable device, and The portable device is communicatively coupled to the device body. The apparatus for determining atrial fibrillation according to claim 1, wherein the first module, the second module, and the third module and/or the display module are integrated into the device body. The apparatus for determining atrial fibrillation according to claim 1, wherein the first module, the second module, and the third module are integrated into a cloud server, and the device body uploads a measurement data. To the cloud server.