Patent Application
20250017524
The present invention relates to an electrocardiogram monitoring device with an electrical stimulation application function, more particularly, to an electrocardiogram monitoring device with an electrical stimulation application function, in which distortion is minimized by adapting the pattern of electrical stimulation output, as biofeedback based on the electrocardiogram measurement results, to the electrocardiogram measurement timing.
Due to the miniaturization and wearability of biometric information detection devices as well as the development of communication technologies such as 5G and IoT, remote health monitoring and medical technology, along with on-site analysis of users, are rapidly developing. Especially electrocardiogram (ECG) monitoring is mainly used to detect cardiac abnormalities such as arrhythmia, myocardial infarction, and angina pectoris. Due to its importance in life activities, portable electrocardiogram monitoring devices capable of communication are widely used in remote health or user monitoring.
An electrocardiogram is an action current resulting from the contraction and expansion of the heart muscle. It is a current generated when the action potential generated when the heart muscle contracts and relaxes spreads from the heart to the entire body. Since this current generates a potential difference depending on the body position, it may be detected and measured through two or more electrodes attached to the human skin.
Conventional electrocardiogram monitoring devices have been manufactured for the purpose of simply measuring and monitoring the user's electrocardiogram and transmitting the measured or analyzed data to a remote healthcare system or medical staff. However, when a risk to the user's heart condition is recognized based on such electrocardiogram data, it is necessary to warn the user or provide light treatment as biofeedback, which applies physical stimulation to the corresponding user. Biofeedback means measuring the body and mind responses using a special device and providing feedback in a form that may be physically perceived so that the users may control their relaxation or tension based on the measurement information.
Conventional biofeedback is mainly obtained by installing a biofeedback device, which is independent of the electrocardiogram monitoring device, in a specific space and having the user lie down or sit comfortably.
However, this conventional technology had problems in that it was difficult to provide continuous monitoring or biofeedback in daily life because it was limited in space and the user's movement or motion was limited.
In relation to this, Republic of Korea Patent Application Publication No. 2007-0097900 discloses an electrocardiogram measuring device which measures the user's electrocardiogram, determines the risk based on the electrocardiogram data, outputs a sound source file to the user to perform acoustic therapy to reduce the instability if it is determined to be mild risk according to the electrocardiogram risk, and stops the output of the sound source file and transmits an alarm sound to notify people around the user of the risk if the risk of the electrocardiogram is high. However, in the case where the risk of the electrocardiogram is light, acoustic therapy based on the output of the sound source file has a problem in that the effect of alleviating the unstable state of the user's electrocardiogram is very small.
In addition, Japanese Patent Application Publication No. 2018-531642 discloses a wearable device including a detection electrode capable of detecting heart signals and an integrated defibrillator electrode pad for electrical stimulation that can deliver a therapeutic shock to the user when a danger signal is detected in the heart. However, in case where continuous monitoring and alarm electrical stimulation are provided rather than a one-time shock using defibrillator electrode pads in situations where urgent treatment is needed, or in case where the risk is mild, i.e., where the user requires continuous low-level electrical stimulation, such as therapeutic electrical stimulation to relieve instability, the problem with this literature is that when electrocardiogram measurement is performed at the same time that electrical stimulation is applied to the user, the electrical stimulation causes distortion in the electrocardiogram signal, making it difficult to accurately monitor the electrocardiogram.
In particular, transcutaneous electrical nerve stimulation (TENS) may be used as a low-level electrical stimulation in humans. This type of electrical stimulation is mainly used to relieve pain by providing electrical stimulation to the skin and muscles. A general TENS device may adjust the frequency, pulse width, and intensity of electrical stimulation, with a preferred frequency of about 1 to 200 Hz and a pulse width of about 50 to 200 μs. However, the frequency and amplitude of this electrical stimulation are similar to those of an electrocardiogram.
Therefore, when the application of such electrical stimulation is performed together with electrocardiogram measurement, the accuracy of electrocardiogram measurement is reduced due to distortion occurring in the electrocardiogram signal. Therefore, electrical stimulation and electrocardiogram measurement are not usually performed together, and a separate device for the electrocardiogram measurement and electrical stimulation was required.
Therefore, a technical object to be achieved by the present invention is to provide an electrocardiogram monitoring device with electrical stimulation function, which when performing electrocardiogram monitoring in a remote healthcare system or remote medical system, feedback for a warning or light treatment can be provided to the user based on electrocardiogram data in the form of electrical stimulation that does not affect subsequent electrocardiogram monitoring, such as distortion.
In addition, another technical object to be achieved by the present invention is to provide an electrocardiogram monitoring device with electrical stimulation function, which does not require additional biometric equipment or electrical stimulation equipment, in addition to an electrocardiogram monitoring device, and thus, can improve the accuracy of electrocardiogram monitoring while achieving the user's electrocardiogram measurement module and electrical stimulation based thereon through a single device for continuous monitoring and biofeedback in daily life.
The technical objects to be achieved by the present invention are not limited to the technical objects mentioned above, and other technical objects not mentioned may be clearly understood by those skilled in the art from the following descriptions.
In order to achieve the technical objects, an electrocardiogram monitoring device according to an embodiment of the present invention comprises an electrocardiogram measurement module, which includes two or more electrodes for electrocardiogram measurement and measures the electrocardiogram of a user at a predetermined electrocardiogram signal acquisition cycle; an electrical stimulation module including two or more electrode pads, which make contact with the skin of the user and provide electrical stimulation; and a control module for controlling operations of the electrocardiogram measurement module and electrical stimulation module, wherein the control module may control the electrical stimulation module to output the electrical stimulation between signal acquisition timings of the acquisition cycle based on an electrocardiogram measurement result for the user from the electrocardiogram measurement module.
According to an embodiment of the present invention, the electrical stimulation may include transcutaneous electrical nerve stimulation (TENS).
According to an embodiment of the present invention, the acquisition cycle may be 1 ms to 10 ms.
According to an embodiment of the present invention, the electrical stimulation module may provide the electrical stimulation with a pulse width of 150 to 400 μs and a frequency of 15 to 25 Hz to the user through the two or more electrode pads.
According to an embodiment of the present invention, the electrocardiogram measurement module may include a monitoring mode and a rest mode, in the monitoring mode, the electrocardiogram measurement module may acquire an electrocardiogram signal of the user at a measurement cycle timing of a predetermined pattern and measure an electrocardiogram, and in the rest mode, the electrocardiogram measurement module stops measuring the electrocardiogram, the control module may control the electrical stimulation module to output the electrical stimulation between the signal acquisition timings of the acquisition cycle based on the electrocardiogram measurement result for the user during the monitoring mode of the electrocardiogram measurement module.
According to an embodiment of the present invention, the electrocardiogram measurement module may digitally convert an electrocardiogram signal acquired within each signal acquisition cycle and generates an analog to digital conversion (ADC) signal, the control module may control the electrical stimulation module to output the electrical stimulation between the ADC signal generation timing and a next electrocardiogram signal acquisition timing based on the electrocardiogram measurement result for the user from the electrocardiogram measurement module.
According to an embodiment of the present invention, during the monitoring mode, when the electrocardiogram measurement result for the user from the electrocardiogram measurement module returns to a predetermined normal range, the control module may control the electrical stimulation module to stop providing the electrical stimulation to the user.
According to an embodiment of the present invention, the electrocardiogram measurement module may filter noise of an electrocardiogram signal by an adaptive noise canceller that uses an output signal of the electrical stimulation as a reference signal.
According to an embodiment of the present invention, the electrocardiogram monitoring device may include electrical stimulation function in which a straight line connecting the two or more electrodes for measuring the electrocardiogram and a straight line connecting the two or more electrode pads providing the electrical stimulation is configured to be arranged perpendicular to each other.
According to an embodiment of the present invention, a communication module that transmits and receives data with a user terminal or external system through a network may be further comprised.
An electrocardiogram monitoring device with electrical stimulation function according to an embodiment of the present invention integrates an electrocardiogram measurement module and an electrical stimulation module that provides biofeedback based on the module into one device, while alternatively providing electrocardiogram measurement timing and electrical stimulation output timing. Therefore, the device enables continuous electrocardiogram monitoring and biofeedback based on the monitoring in daily life without spatial constraints, while improving the accuracy of electrocardiogram monitoring by minimizing distortion of the electrocardiogram measurement signal.
The effects of the present disclosure are not limited to the above-mentioned effects, and it should be understood that the effects of the present disclosure include all effects that could be inferred from the configuration of the invention described in the detailed description of the invention or the appended claims.
Hereinafter, the present invention will be explained with reference to the accompanying drawings. The present invention, however, may be modified in various different ways, and should not be construed as limited to the embodiments set forth herein. Also, in order to clearly explain the present invention, portions that are not related to the present invention are omitted, and like reference numerals are used to refer to like elements throughout.
Throughout the specification, it will be understood that when an element is referred to as being “connected (accessed, contacted, coupled) to” another element, this includes not only cases where the elements are “directly connected,” but also cases where the elements are “indirectly connected” with another member therebetween. Also, it will also be understood that when a component “includes” an element, unless stated otherwise, this does not mean that other elements are excluded, but that other element may be further added.
Terms used herein may be merely to describe a certain embodiment, and may not be intended to limit the disclosure. The singular expressions may include plural expressions unless the context clearly dictates otherwise. In the specification, it will be further understood that the terms “comprise” and “include” specify the presence of stated features, integers, steps, operations, elements, components, or combinations thereof, but do not preclude in advance the possibility of the presence or addition of one or more other features, integers, steps, operations, elements, components, or combinations.
Hereinafter, an electrocardiogram monitoring device with electrical stimulation function according to an embodiment of the present invention will be described with reference to the drawings.
On the other hand,
Recognizing this problem, the inventor has invented an electrocardiogram monitoring device, which is not limited to simply monitoring and analyzing electrocardiogram measurement results, but can immediately provide feedback, such as an alarm or light treatment, to the user through electrical stimulation when an abnormality is detected in the results even while the electrocardiogram monitoring device is operating in a monitoring mode, while maintaining monitoring accuracy by minimizing distortion of electrocardiogram measurement results due to the electrical stimulation.
The ECG measurement module 310 may measure the user's electrocardiogram at a predetermined electrocardiogram signal acquisition cycle, and may include a signal acquisition unit including two or more ECG measurement electrodes for ECG measurement, and a signal analysis unit that analyzes the ECG signal acquired from the signal acquisition unit and provides status diagnosis results and/or ECG measurement signal data to the user as an analysis result. The ECG measurement module 310 may include a monitoring mode and a rest mode. In the monitoring mode, the ECG measurement module 310 may measure the user's ECG at a measurement cycle timing of a predetermined pattern through the signal acquisition unit. In the rest mode, ECG measurement of the ECG measurement module 310 may be stopped.
During the monitoring mode, the ECG measurement module 310 may acquire an ECG signal from the signal acquisition unit at a cycle of 1 ms to 10 ms or a frequency of 100 Hz to 1000 Hz, but is not limited to this cycle. The ECG measurement module 310 may convert an analog signal into a digital signal immediately after acquiring the user's ECG signal at the cycle from the signal acquisition unit to generate an analog to digital conversion (ADC) signal. The generation cycle interval of the ADC signal is the same as the cycle interval for acquiring the ECG signal, and may be preferably 1 ms to 10 ms, more preferably 1 ms to 2 ms, but is not limited thereto. The signal analysis unit may receive the ADC signal generated by the signal acquisition unit to analyze the user's cardiac signs, and the analysis result of the ADC signal may be transmitted to the control module 330, data management module 340, and/or communication module 350.
The electrical stimulation module 320 may include an electrical stimulation output unit that outputs the electrical stimulation and a stimulation pad including two or more electrical stimulation electrodes that are electrically connected to the electrical stimulation output unit and are in contact with the user's skin to apply the electrical stimulation. The electrical stimulation output unit may output at least one electrical stimulation pattern, and the electrical stimulation pattern may be set by changing at least one of electrical stimulation timing, time interval, frequency, and output intensity. The electrical stimulation module 420 may preferably apply transcutaneous electrical nerve stimulation (TENS) through the two or more electrical stimulation electrodes, but is not limited thereto. In addition, the electrical stimulation may be, but is not limited to, electrical stimulation with a pulse width of 150 to 400 μs and a frequency of 15 to 25 Hz. The electrical stimulation module 320 may include a first output mode that outputs the electrical stimulation to the user during the monitoring mode of the ECG measurement module 310, and a second output mode that outputs the electrical stimulation to the user after switching to the rest mode of the ECG measurement module 310. In the first output mode, the electrical stimulation module 320 may be configured to apply a plurality of electrical stimulation patterns based on the measurement results of the ECG measurement module 310.
The control module 330 may transmit and receive data with the ECG measurement module 310 and the electrical stimulation module 320 and control the operations of the ECG measurement module 310 and electrical stimulation module 320. The control module 330 may control the electrical stimulation module 320 to output and provide the electrical stimulation to the user in order to provide a warning to the user or adjust the user's condition based on the status diagnosis results provided by the ECG measurement module 310. In one embodiment of the present invention, when a status diagnosis result indicating that the user's heart condition is ‘abnormal’ is provided while the monitoring mode of the ECG measurement module 310 is operating, the control module 330 may control the electrical stimulation module 320 to provide one electrical stimulation of at least one electrical stimulation pattern to the user through this electrical stimulation electrode.
The control module 330 may control the type of electrical stimulation pattern provided by the electrical stimulation module 320 based on the heart rate determined by the ECG measurement module 310 or the determination of the user's heart condition according to the analysis. Based on the ECG measurement results, the control module 330 may control the electrical stimulation module 320 to provide the electrical stimulation to the user only during the interval between signal acquisition timings in the ECG signal acquisition cycle, that is, the time interval during which ECG measurement is not performed. In addition, the control module 330 may reduce distortion in the measured ECG signal by controlling the timing of the electrical stimulation output of the electrical stimulation module 320 to intersect entirely or partially with the ECG signal acquisition timing of the ECG measurement module 310, based on the ECG measurement result of the ECG measurement module 310. In one embodiment of the present invention, the control module 330 may control the electrical stimulation module to output the electrical stimulation between the ADC signal generation timing and a next electrocardiogram signal acquisition timing based on the electrocardiogram measurement result for the user from the ECG measurement module 330. During the monitoring mode, when the ECG measurement result for the user from the ECG measurement module 310 returns to a predetermined normal range, the control module 330 may control the electrical stimulation module 320 to stop providing the electrical stimulation to the user.
The data management module 340 may store and process data generated from at least one of the ECG measurement module 310, electrical stimulation module 320, and control module 330.
The communication module 350 allows the ECG monitoring device 300 to transmit and receive data with a user terminal such as a smartphone or tablet or an external system through a network. Examples of networks include 3rd Generation Partnership Project (3GPP) network, Long Term Evolution (LTE) network, 5G network, World Interoperability for Microwave Access (WIMAX) network, wired and wireless Internet, Local Area Network (LAN), and Wireless Local Area Network (Wireless LAN), Wide Area Network (WAN), Personal Area Network (PAN), Bluetooth network, Wifi network, Near Field Communication (NFC) network, satellite broadcasting network, analog broadcasting network, Digital Multimedia Broadcasting (DMB) networks, etc., but are not limited thereto.
The power supply module 360 may include at least one of a battery unit capable of charging or discharging electricity, and a power connection unit capable of supplying power by connecting to a commercial power grid.
In one embodiment of the present invention shown in
However, since the ECG signal acquisition cycle in the monitoring mode in one embodiment of the present invention is very short, for example, about 1 to 10 ms, even if the timing of the electrical stimulation output is temporally arranged between the ECG acquisition timings so as not to overlap with the ECG acquisition timing, in the case of the ECG signal 440 measured immediately after the application of the electrical stimulation, slight residual distortion may occur due to the applied electrical stimulation.
Therefore, in the ECG monitoring device 300 of an embodiment of the present invention, the signal analysis unit of the ECG measurement module 310 filters the ECG signal acquired from the signal acquisition unit by an adaptive noise canceller (ANC) 500 and then analyze the signal, thereby further minimizing signal distortion.
Specifically, referring to
In step S520, when the signal analysis unit determines that the ECG signal of the ECG measurement module is abnormal, the control module 330 outputs an electrical stimulation on-off crossover signal at the timing of a time period during which ECG signal measurement is not performed within the ECG signal acquisition cycle so that the ECG signal acquisition timing and/or ADC signal generation timing of the ECG measurement module 310 do not overlap, and thus, controls the electrical stimulation to be applied to the skin of the user.
In step S530, the control module 330 may input the on-off crossover signal of the electrical stimulation as a reference input 620 of the adaptive noise canceller 500, where the reference input 620 may include the reference to noise caused by the electrical stimulation output.
In step S540, after the on-off crossover signal of the electrical stimulation is output, the ECG measurement module 310 acquires the user's ECG signal again through the signal acquisition unit and digitally converts it to generate an ADC signal. The ADC signal may be an ECG waveform in which minute residual noise and/or distortion is generated due to the electrical stimulation. In step S550, the ECG measurement module 310 inputs the ECG ADC signal as the main input 620 of the adaptive noise controller 600, and in step S560, the adaptive noise canceller 600 cancels the noise generated by the electrical stimulation by filtering the input ECG ADC signal with reference to the reference signal.
The adaptive noise canceller 600 according to an embodiment of the present invention may include an adaptive filter 630. In a general time domain, the input signal is delayed by a time delay element to generate N sequences, each of which is multiplied by a weight and then added again (640) to generate an output signal (650). A method in which these output signals may be compared with a desired reference input signal to obtain an error and this error is used to change the weight (630) may be used.
The ECG measurement module 710 may include a signal acquisition unit including two left electrodes (LA) 712 and right electrodes (RA) 714 for ECG measurement, and a signal analysis unit that analyzes the signal provided by the signal acquisition unit. When the signal analysis unit determines that a waveform that satisfies predetermined characteristic conditions exists within the waveform of the ECG signal acquired by the signal acquisition unit, it may first determine that a signal corresponding to the waveform that satisfies the predetermined characteristic conditions is a suspected abnormal ECG signal. The predetermined characteristic condition may be a condition for a characteristic in which a signal belonging to a threshold range occurs during a predetermined time.
The electrical stimulation module 720 may include an electrical stimulation electrode pad unit including two electrical stimulation electrode pads 722 and 724 that provide a positive electrode (+) and a negative electrode (−) respectively for contacting the user's skin and applying electrical stimulation, and an electrical stimulation output 722 that outputs electrical stimulation to the electrical stimulation electrode pad unit according to control signals from the control module. The two electrical stimulation electrode pads 722 and 724 may be attached to the right and left hands, respectively, for example.
When an angle between a straight line connecting the two electrodes for measuring the ECG and a straight line connecting the two electrical stimulation electrode pads for outputting the electrical stimulation changes, a degree to which noise and/or distortion is generated in the ECG measurement signal of the electrical stimulation applied to the user is different. Thus, two electrodes for measuring the ECG and two electrical stimulation electrode pads for outputting the electrical stimulation may be arranged within the ECG monitoring device 700 to minimize this effect. For example, in the ECG monitoring device according to an embodiment of the present invention, a straight line connecting the two electrodes for measuring ECG and a straight line connecting the two electrical stimulation electrode pads for outputting the electrical stimulation may be arranged perpendicular to each other in order to minimize distortion of the ECG measurement signal.
However, in the ECG monitoring device 700 according to an embodiment of the present invention in
Therefore, in the ECG monitoring device with electrical stimulation function according to an embodiment of the present invention, in order for the user's ECG measurement signal to be analyzed by minimizing the influence of noise or distortion due to the application of electrical stimulation, more preferably, the straight line connecting the two electrodes for the ECG measurement within the ECG monitoring device 600 and the straight line connecting the two electrical stimulation electrode pads that output the electrical stimulation can be arranged to be perpendicular to each other.
The description of the present invention is used for illustration and those skilled in the art will understand that the present invention can be easily modified to other detailed forms without changing the technical spirit or an essential feature thereof. Therefore, the aforementioned exemplary embodiments are all illustrative in all aspects and are not limited. For example, each component described as a single type may be implemented to be distributed and similarly, components described to be distributed may also be implemented in a combined form.
The scope of the present invention is to be defined by the scope of claims provided below, and all variations or modifications that can be derived from the meaning and scope of the claims as well as their equivalents are to be interpreted as being encompassed within the scope of the present invention.
The present invention may provide an electrocardiogram monitoring device with electrical stimulation function which integrates an electrocardiogram measurement module and an electrical stimulation module that provides biofeedback based on the module into one device, while alternatively providing electrocardiogram measurement timing and electrical stimulation output timing. Therefore, the device enables continuous electrocardiogram monitoring and biofeedback based on the monitoring in daily life without spatial constraints, while improving the accuracy of electrocardiogram monitoring by minimizing distortion of the electrocardiogram measurement signal.
| Number | Date | Country | Kind |
|---|---|---|---|
| 10-2021-0193231 | Dec 2021 | KR | national |
| Filing Document | Filing Date | Country | Kind |
|---|---|---|---|
| PCT/KR2022/013785 | 9/15/2022 | WO |
