KR100439193B1 - Automatic defibrillator and method of defibrillate - Google Patents

Abstract

The present invention relates to an automatic defibrillation method that checks a patient's heart condition to automatically give an electric shock.

An automatic defibrillation method according to an embodiment of the present invention includes a first step of detecting an electrocardiogram from a patient; A second step of removing noise from the detected ECG; Selecting a wave having the highest voltage value among the eggs (R), S (S), tee (T), cue (Q), and blood (P) of the ECG from which the noise is removed; A fourth step of measuring a voltage value of the wave selected in the third step and calculating a heart rate in the selected wave; A fifth step of storing the heart rate and voltage values if the heart rate and voltage values measured in the fourth step are measured when the patient is in a normal state; A sixth step of storing respective threshold values corresponding to the heart rate and the voltage value; A seventh step of repeating the first to fourth steps and detecting the voltage value and heart rate of the wave selected from the patient; An eighth step of calculating a difference between the voltage value and the heart rate stored in the seventh step from the heart rate and the voltage value detected in the fifth step; A ninth step of comparing the value calculated in the eighth step with the threshold value; A tenth step of sounding an alarm if the value calculated in the ninth step is greater than a threshold value; And an eleventh step of applying a pulse to the patient if the value calculated in the ninth step is larger than the threshold value.

Description

Automatic defibrillator and defibrillation method {AUTOMATIC DEFIBRILLATOR AND METHOD OF DEFIBRILLATE}

The present invention relates to an automatic defibrillator and a defibrillation method, and more particularly, to an automatic defibrillator and a defibrillation method to check the patient's heart condition to give an electric shock automatically.

The human heart has a command system that operates the myocardium in a certain order in order to release blood effectively. In other words, the heart supplies blood to the arteries by repeating contraction and expansion in a certain order. If the heart does not move in a certain order, the heart cannot efficiently supply blood to the arteries.

Cardiac fibrillation is when the heart does not move in a certain order. Atrial fibrillation is further divided into ventricular fibrillation and atrial fibrillation.

Ventricular fibrillation is a case in which the atria move in a certain order, but the ventricular muscle movement is disordered. Disorderly movement of the ventricular muscles causes the entire ventricular muscles to contract almost simultaneously, with random parts of the ventricles contracting and expanding. When the ventricular muscle contractions and expansions become random, the heart cannot send blood to the arteries. If the heart fails to send blood to the arteries, the patient dies in two to three minutes.

Atrial fibrillation is a case in which the ventricles are moving in a uniform order, but the atria are moving in a random way. If the atrium is in disorder, it will not be able to supply enough blood to the ventricles. Therefore, when the atrial fibrillation state is above a predetermined state, the patient is fatally damaged (or killed).

When a cardiac fibrillation occurs in a patient, a predetermined electric shock is applied to the patient using a defibrillator. At this time, the defibrillator applies a predetermined pulse to the patient, thereby operating the heart of the patient.

1 is a diagram illustrating an electrocardiogram waveform.

Referring to FIG. 1, an electrocardiogram (ECG) is an abbreviation of an electrocardiogram and is measured by measuring a current occurring at any two points of the atrium and the ventricles. Such electrocardiograms are used for the diagnosis of heart disease. In other words, the electrocardiogram is shown in the form of Figure 1 during normal heart operation. That is, the electrocardiogram is divided into R, S, T, Q, and P.

However, when the heart does not operate normally, the waveform as shown in FIG. 1 does not appear. When the ECG does not appear normally, the ECG appears normally by applying a predetermined shock to the heart using a defibrillator. At this time, the pulse applied from the defibrillator is applied to be synchronized with the R wave.

The conventional defibrillator checks the electrocardiogram of a patient through a monitor and manually applies an electric shock when the checked electrocardiogram is abnormal. In other words, conventional defibrillators should always monitor the monitor. In addition, when an ECG abnormality occurs while the monitor is not checked, fatal damage may occur to the patient.

On the other hand, the ECG waveform of the patient may appear slightly different from patient to patient. Therefore, the characteristics of each patient should be used to use the defibrillator. However, the conventional defibrillator is operated manually, and there is a concern that the defibrillator may be used when the patient is generating a normal ECG waveform.

Accordingly, an object of the present invention is to provide an automatic defibrillator and a defibrillation method that can automatically give an electric shock by checking the heart state of the patient.

1 shows an electrocardiogram waveform.

2 is a flowchart illustrating an automatic defibrillation method according to an embodiment of the present invention.

3 illustrates an automatic defibrillator according to an embodiment of the present invention.

4 is a view illustrating an operation process of the high frequency detection unit illustrated in FIG. 3.

<Description of Symbols for Main Parts of Drawings>

20: ECG detector 22: Band filter

24: frequency detector 26: waveform analyzer

28: memory 40: waveform comparison unit

42: waveform generator 44: pulse applying unit

Automatic defibrillation method according to an embodiment of the present invention to achieve the above object comprises a first step of detecting an electrocardiogram from a patient; A second step of removing noise from the detected ECG; Selecting a wave having the highest voltage value among the eggs (R), S (S), tee (T), cue (Q), and blood (P) of the ECG from which the noise is removed; A fourth step of measuring a voltage value of the wave selected in the third step and calculating a heart rate in the selected wave; A fifth step of storing the heart rate and voltage values if the heart rate and voltage values measured in the fourth step are measured when the patient is in a normal state; A sixth step of storing respective threshold values corresponding to the heart rate and the voltage value; A seventh step of repeating the first to fourth steps and detecting the voltage value and heart rate of the wave selected from the patient; An eighth step of calculating a difference between the voltage value and the heart rate stored in the seventh step from the heart rate and the voltage value detected in the fifth step; A ninth step of comparing the value calculated in the eighth step with the threshold value; A tenth step of sounding an alarm if the value calculated in the ninth step is greater than a threshold value; And an eleventh step of applying a pulse to the patient if the value calculated in the ninth step is larger than the threshold value.

And if the value calculated in the ninth step is smaller than a threshold, repeating the first to fourth steps, and the seventh and ninth steps.

An automatic defibrillator according to an embodiment of the present invention includes an electrocardiogram detector for detecting an electrocardiogram from a patient; At least one band filter for removing noise of an electrocardiogram detected from an electrocardiogram detector; Input the ECG from which the noise is removed from the band pass filters, and find the highest voltage value among the eggs (R), S (S), T (T), cue (Q), and P (P) of the received ECG. A frequency detector for selecting; A waveform analyzer for measuring a voltage value of the selected wave from the frequency detector and calculating a heart rate using the selected period of the wave; The patient is at risk when the patient's steady-state heart rate and selected wave voltage values are stored and the difference between the heart rate and voltage values stored in the patient and the heart rate and voltage values detected by the waveform analyzer is out of a certain range. A memory for storing a threshold value for recognizing that it is a memory; A waveform comparison unit for comparing the difference between the heart rate and voltage value stored in the memory and the difference between the heart rate and voltage value detected by the waveform analysis unit and the threshold value, and generating a control signal when the difference value is greater than or equal to the threshold value; An alarm generator configured to receive a control signal and generate an alarm; It is provided with a pulse applying unit for receiving a control signal and applying a predetermined pulse in the patient.

The band filters are separated in units of frequency to remove noise of an electrocardiogram.

Other objects and features of the present invention in addition to the above objects will become apparent from the description of the embodiments with reference to the accompanying drawings.

Hereinafter, exemplary embodiments of the present invention will be described with reference to FIGS. 2 to 4.

2 is a flowchart illustrating an automatic defibrillation method according to an embodiment of the present invention, Figure 3 is a view showing an automatic defibrillator according to an embodiment of the present invention.

2 and 3, first, the ECG detecting unit 20 detects an ECG from a patient. (S2) The ECG detected in the step S2 has noise by a plurality of band filters 22A, 22B, ..., 22Z. (S3) Band filters 22A, 22B, ..., 22Z separate the ECG by frequency to remove noise from the ECG.

For example, the frequency of the electrocardiogram detected from the patient has approximately 3 Hz to 40 Hz. At this time, one band filter 22 removes ECG noise while passing a frequency in a predetermined unit (for example, 3 kHz). The ECG waveform from which the noise is removed in step S3 is input to the frequency detector 24.

The frequency detector 24 selects a wave having the highest voltage among R, S, T, Q, and P of the ECG. In other words, the scan number detection unit 24 selects the wave having the highest voltage among the waves of the ECG passing through the band filters 22A, 22B, ..., 22Z as shown in FIG. 4 (S4). R wave has the highest voltage.

Thereafter, the waveform analyzer 26 calculates a heart rate by checking the interval of the wave selected by the frequency detector 24. In addition, the voltage of the wave selected by the scan number detector 24 is checked (S5). At this time, the heart rate detected by the waveform analyzer 26 and the voltage of the selected wave are stored in the memory 28 (S6). On the other hand, the heart rate and the selected wave voltage to be stored in the memory 28 are checked when the patient is in a steady state.

After the heart rate and the selected wave voltage are stored in the memory 28 in step S6, the thresholds for the heart rate and the voltage of the selected wave are stored in the memory 28. For example, the interval of the selected wave, That is, if the heart rate is 80 when the patient is in a steady state, a corresponding threshold value (for example, 40) is stored. Such thresholds indicate that the patient is out of normal heart rate and enters a dangerous state. Likewise, a threshold for the voltage of the selected wave is stored in memory 28.

On the other hand, if the threshold value is stored in the memory 28 and repeating steps S2 to S5 detects the ECG from the patient. (S2 to S5), the waveform comparator 40 detects the heart rate and voltage and the memory 28 (S10) At this time, the waveform comparator 40 calculates the difference between the heart rate and voltage stored in the memory from the detected heart rate and voltage, and thresholds the calculated value. Compare with the value (S12).

If the difference between the heart rate and / or the voltage in the step S12 is less than the threshold value is repeated steps S2 to S12. If the difference between the heart rate and / or voltage is greater than the threshold in step S12, the waveform comparator 40 supplies a control signal to the alarm generator 42 and the pulse application unit 44.

The alarm generator 42 receiving the control signal generates a predetermined alarm (for example, voice or sound) to inform that the patient is in an emergency state (S14). At the same time, the pulse applying unit 44 that receives the control signal is input. Applies a predetermined pulse to the patient. (S16) At this time, the pulse applied to the patient is applied to be synchronized with the R wave or the S wave of the ECG. After the pulse is applied at step S16, steps S2 to S16 are repeated.

As described above, according to the automatic defibrillator and the defibrillation method according to the present invention, the ECG of the patient is automatically checked, and the pulse is automatically applied when there is an abnormality in the checked ECG. Thus, the user does not always have to monitor the monitor.

In addition, when the patient is in a normal state, the ECG is input and stored, and the ECG abnormality of the patient may be accurately measured by comparing the stored ECG with the currently checked ECG.

Those skilled in the art will appreciate that various changes and modifications can be made without departing from the technical spirit of the present invention. Therefore, the technical scope of the present invention should not be limited to the contents described in the detailed description of the specification but should be defined by the claims.

Claims (4)

Detecting an electrocardiogram from a patient; A second step of removing noise from the detected ECG; Selecting a wave having the highest voltage value among eggs (R), S (S), tee (T), cue (Q), and blood (P) of the ECG from which the noise is removed; A fourth step of measuring a voltage value of the wave selected in the third step and calculating a heart rate in the selected wave; A fifth step of storing the heart rate and voltage value if the heart rate and voltage value measured in the fourth step are measured when the patient is in a normal state; A sixth step of storing respective threshold values corresponding to the heart rate and voltage value; A seventh step of repeating the first to fourth steps and detecting a voltage value and a heart rate of the selected wave from the patient; An eighth step of calculating a difference between the voltage value and the heart rate stored in the seventh step from the heart rate and the voltage value detected in the fifth step; A ninth step of comparing the threshold calculated with the eighth step; A tenth step of sounding an alarm if the value calculated in the ninth step is greater than the threshold value; And an eleventh step of applying a pulse to the patient if the value calculated in the ninth step is larger than the threshold value. The method of claim 1, And if the value calculated in the ninth step is smaller than the threshold value, repeating the first to fourth, seventh and ninth steps. An electrocardiogram detector for detecting an electrocardiogram from a patient; At least one band filter for removing noise of the electrocardiogram detected from the electrocardiogram detector; The electrocardiogram from which the noise is removed is input from the band pass filters, and a voltage value among the eggs (R), S (S), T (T), cue (Q), and P (P) of the received ECG is A frequency detector for selecting a high wave; A waveform analyzer for measuring a voltage value of the selected wave from the frequency detector and calculating a heart rate using the selected period of the wave; When the patient's steady state heart rate and the voltage value of the selected wave are stored, and the difference between the heart rate and voltage value stored in the patient and the heart rate and the voltage value detected by the waveform analyzer is out of a predetermined range A memory for storing a threshold for recognizing that the patient is at risk; A waveform for generating a control signal when the difference between the heart rate and voltage value stored in the memory and the difference between the heart rate and the voltage value detected by the waveform analyzer and the voltage value is greater than or equal to the threshold value. A comparator; An alarm generator for receiving the control signal and generating an alarm; And a pulse applying unit configured to receive the control signal and apply a predetermined pulse from the patient. The method of claim 3, The band filters are separated by a frequency unit to remove the noise of the ECG.