Guidance device based on detection of cardiopulmonary resuscitation (CPR) execution

Abstract

This invention provides a guidance device that generates voice guidance regarding pulmonary resuscitation (pulmonary resuscitation) based on the detection of cardiopulmonary resuscitation (CPR) execution. [Solution] The guidance device 1 for detecting the execution of cardiopulmonary resuscitation includes a pair of electrode pads 10 attached to the patient's body, a signal providing unit 20 that provides signals to the pair of electrode pads, a differential amplifier unit 30 connected to the pair of electrode pads that generates an amplified signal proportional to the difference between the input signals at both ends provided by the signal providing unit, and a control unit 100 that stores a normal speed range for a plurality of amplified signals generated by the differential amplifier unit and determines whether or not cardiopulmonary resuscitation has been performed and whether or not the cardiopulmonary resuscitation has been performed normally based on the speed of the plurality of amplified signals generated by the differential amplifier unit.

Description

Technical Field

[0001] The present invention relates to a guidance device for sensing the execution of cardiopulmonary resuscitation methods, and more particularly, to a guidance device for sensing the execution of cardiopulmonary resuscitation methods that provides guidance voices related to cardiopulmonary resuscitation methods.

Background Art

[0002] The rapid execution of cardiopulmonary resuscitation (CPR) and defibrillation for patients with cardiac arrest can increase the survival rate of patients. Automated external defibrillators that can be easily used for defibrillation not only by medical personnel but also by non-medical personnel are installed in public places such as multi-use facilities, schools, and public institutions.

[0003] Korean Registered Patent No. 10-1049273, "Automated External Defibrillator and Its Operating Method," includes a voice guidance unit that guides the rescuer through the treatment steps for the patient by voice, a step execution evaluation unit that evaluates the degree of execution for each step of the guidance voice of the voice guidance unit, and a guidance voice change unit that changes the guidance voice stage of the voice guidance unit according to the evaluation result of the execution evaluation unit. The corresponding publication evaluates the degree of use of the defibrillator by the user and provides a customized voice guidance suitable for the user level. International Patent Application Publication WO2005 / 099818 A2, "Automated Pediatric Defibrillator," includes a graphical display unit and a character display unit provided on the cover, and a user interface that includes a display unit or a voice speaker that prompts the rescuer and assists the rescuer when treating the patient. It outputs voice or character prompts to the rescuer to understand the patient's condition and guides the rescuer to perform defibrillation.

[0004] However, while conventional rescue guidance devices guide users on how to perform defibrillation, they provide no guidance on how to perform cardiopulmonary resuscitation (CPR) by a professional or non-professional rescuer after defibrillation. In particular, non-professional rescuers lack experience and training in CPR, which can lead to problems with the speed of chest compressions being too slow or too fast in urgent situations. Furthermore, professional rescuers, despite their expertise in first aid including CPR, receive the same excessive guidance from all users, which hinders faster rescues. [Overview of the project] [Problems that the invention aims to solve]

[0005] Therefore, the object of the present invention is to provide a guidance device that detects the performance of cardiopulmonary resuscitation (CPR) and determines whether or not CPR has been performed and whether or not CPR has been performed correctly, and provides guidance accordingly.

[0006] Another object of the present invention is to provide a cardiopulmonary resuscitation (CPR) sensing guidance device that, while conventional defibrillator equipment provides guidance for cardiopulmonary resuscitation (CPR) via pre-set voice guidance upon product release, if the guidance is detailed and thorough, it can interfere with the quick and rapid CPR action of a skilled user, and if it is set to be abbreviated and concise, it can cause delays in CPR action by inexperienced users. To address these issues, the present invention provides a CPR action sensing guidance device that monitors the change in chest impedance at both ends of the defibrillator pads for a certain period of time when the voice guidance for CPR begins, and if CPR is performed correctly, the voice guidance for CPR proceeds concisely, thereby providing CPR guidance suitable for both skilled and inexperienced users, and simultaneously improving the efficiency and accuracy of CPR execution. [Means for solving the problem]

[0007] The cardiopulmonary resuscitation (CPR) execution detection guidance device according to the present invention for achieving the above objective includes: a pair of electrode pads attached to the patient's body; a signal providing unit that provides signals to the pair of electrode pads; a differential amplifier connected to the pair of electrode pads that generates an amplified signal proportional to the difference between the input signals at both ends provided by the signal providing unit; and a control unit that stores a normal speed range for a plurality of amplified signals generated by the differential amplifier, and determines whether or not CPR is being performed and whether or not CPR is being performed normally based on the plurality of amplified signals generated by the differential amplifier and the speed of the plurality of amplified signals generated by the differential amplifier. When the pair of electrode pads are attached to the patient's chest, the presence or absence of CPR is determined based on the difference in amplitude size of the plurality of amplified signals generated by the differential amplifier, and then the presence or absence of normal CPR is determined based on whether or not the speed of the amplified signals from the differential amplifier is at a normal speed, so that voice guidance can be provided regarding this.

[0008] Furthermore, the system includes a speaker that outputs guidance audio regarding cardiopulmonary resuscitation (CPR). The control unit stores guidance audio regarding how to perform CPR, and controls the speaker so that when an amplified signal generated by the differential amplifier is received, the guidance audio regarding how to perform CPR is output. In particular, this guides non-professional rescuers on the procedures of CPR, making it easy for non-professional rescuers to perform CPR.

[0009] The control unit stores guidance voice messages regarding whether or not cardiopulmonary resuscitation (CPR) is being performed and whether or not CPR is being performed correctly. Based on the multiple amplified signals generated by the differential amplifier, if it is determined that CPR is not being performed, the control unit controls the system to output the corresponding guidance voice message. If there is no difference in the input signals from the pair of electrode pads, it means that CPR is not being performed, and therefore guidance voice messages regarding the execution and method of performing CPR can be output.

[0010] The control unit stores a shortened voice guidance and a detailed voice guidance for whether or not cardiopulmonary resuscitation (CPR) is being performed correctly. When the speed of the multiple amplified signals generated by the differential amplifier is within the normal speed range, the shortened voice guidance is output. When the speed of the multiple amplified signals generated by the differential amplifier deviates from the normal speed range, the detailed voice guidance is output. This allows the system to output a shortened voice guidance, which is a beep sound, in accordance with a predetermined chest compression speed (100 to 120 times per minute) when CPR is being performed correctly, and to output a detailed voice guidance for whether the chest compression speed is too slow or too fast when CPR is being performed abnormally.

[0011] The control unit stores the critical number of times cardiopulmonary resuscitation (CPR) is performed, calculates the number of times CPR is performed based on a plurality of amplified signals generated by the differential amplifier, determines whether the calculated number of times exceeds the critical number, and controls the output of either the shortened guidance voice or the detailed guidance voice if the number of times does not exceed the critical number. If the number of times does not exceed the critical number, the shortened guidance voice, which is a beep sound that adjusts to a predetermined chest compression speed (100 to 120 times per minute) so that chest compressions are continued, is output. If the number of times exceeds the critical number, the detailed guidance voice is output to prevent further chest compressions.

[0012] The control unit monitors the rescuer's condition and the accuracy of the cardiopulmonary resuscitation (CPR) procedure in real time, and outputs detailed voice guidance in stages according to the basic stage, intermediate stage, and special circumstances of the CPR procedure.

[0013] The control unit provides detailed voice guidance that is configured to provide basic guidance on chest compression position, compression depth, and compression speed during the basic stages of cardiopulmonary resuscitation, to evaluate compression depth and speed in real time during the intermediate stages and provide feedback if they deviate from the normal range, and to provide immediate guidance in special situations such as the rescuer's exhaustion, inaccurate hand positioning, or inconsistent compression rhythm.

[0014] The control unit attaches a pressure sensor to the chest compression site during cardiopulmonary resuscitation to measure the pressure generated during cardiopulmonary resuscitation in real time, calculates the compression depth and velocity based on the data collected by the pressure sensor, and converts the calculated results into audio and visual feedback.

[0015] The pressure sensor is configured by selecting one of the following: a piezoresistive pressure sensor, a piezoelectric sensor, or a capacitive pressure sensor. The control unit determines whether or not cardiopulmonary resuscitation (CPR) is being performed and whether or not it can be performed successfully, based on the pressure data sensed by the pressure sensor.

[0016] Based on the data collected from the pressure sensor, the control unit immediately provides voice and visual guidance to the rescuer via the speaker and display unit if the compression depth is insufficient or excessive, or if the compression speed deviates from the normal range.

[0017] The method for guiding the patient in the event of performing cardiopulmonary resuscitation according to the present invention, for achieving the above objective, includes the steps of: storing a normal speed range for a plurality of amplified signals generated by a differential amplifier unit connected to a pair of electrode pads attached to the patient's body and generating an amplified signal proportional to the difference between the input signals at both ends provided by a signal providing unit; and determining whether or not cardiopulmonary resuscitation is being performed and whether or not the cardiopulmonary resuscitation is being performed normally, based on the speed of the plurality of amplified signals generated by the differential amplifier unit. When the pair of electrode pads are attached to the patient's chest, the presence or absence of cardiopulmonary resuscitation is determined based on the difference in amplitude sizes of the plurality of amplified signals generated by the differential amplifier unit, and then determining whether or not the cardiopulmonary resuscitation is being performed normally based on whether or not the speed of the amplified signals from the differential amplifier unit is at a normal speed, so that voice guidance can be provided accordingly.

[0018] Furthermore, if the system includes a step of saving an audio guidance on how to perform cardiopulmonary resuscitation (CPR), and a step of outputting the audio guidance on how to perform CPR when an amplified signal generated by the differential amplifier is received, then, in particular, the procedure for CPR is guided to non-professional rescuers, making it easy for non-professional rescuers to perform CPR.

[0019] Furthermore, if the system includes a step of saving guidance audio regarding whether or not cardiopulmonary resuscitation (CPR) was performed and whether or not it was performed correctly, and a step of outputting the guidance audio when it is determined that CPR has not been performed based on the speed of multiple amplified signals generated by the differential amplifier, then if there is no difference in the input signals from the pair of electrode pads, it means that CPR has not been performed, and therefore guidance audio regarding the execution and method of performing CPR can be output.

[0020] Furthermore, if the system includes the steps of saving a shortened guidance voice and a detailed guidance voice regarding whether or not cardiopulmonary resuscitation (CPR) is being performed normally, outputting the shortened guidance voice when the speed of the multiple amplified signals generated by the differential amplifier is within the normal speed range, and outputting the detailed guidance voice when the speed of the multiple amplified signals generated by the differential amplifier deviates from the normal speed range, then when CPR is being performed normally, a shortened guidance voice, which is a beep sound that matches a predetermined chest compression speed (100 to 120 times per minute), is output, and when CPR is being performed abnormally, a detailed guidance voice indicating whether the chest compression speed is too slow or too fast is output.

[0021] Furthermore, if the system includes the steps of: saving the critical number of cardiopulmonary resuscitation (CPR) procedures; calculating the number of CPR procedures based on a plurality of amplified signals generated by the differential amplifier; determining whether the calculated number of procedures exceeds the critical number; and outputting the determination result, either the shortened guidance voice or the detailed guidance voice, then if the number of procedures does not exceed the critical number, a shortened guidance voice, which is a beep sound adjusted to a predetermined chest compression speed (100 to 120 times per minute), is output so that chest compressions continue. If the number of procedures exceeds the critical number, a detailed guidance voice is output to prevent further chest compressions. [Effects of the Invention]

[0022] According to the present invention, when a pair of electrode pads are attached to a patient's chest, after determining the presence or absence of cardiopulmonary resuscitation based on the difference in the amplitude sizes of a plurality of amplified signals generated by a differential amplification unit, depending on whether the speed of the amplified signal of the differential amplification unit is the normal speed, it is possible to determine the presence or absence of normal cardiopulmonary resuscitation, and thus voice guidance can be provided for this.

[0023] In addition, since it guides non-professional rescuers on the要领 of cardiopulmonary resuscitation, even in the case of non-professional rescuers who are not professional rescuers, it is possible to easily perform cardiopulmonary resuscitation.

[0024] Furthermore, if there is no difference in the input signals from the pair of electrode pads, it means that cardiopulmonary resuscitation is not being performed, so it is possible to output a guidance voice regarding the execution and execution method of cardiopulmonary resuscitation.

[0025] Also, when cardiopulmonary resuscitation is being performed normally, in accordance with a predetermined chest compression speed (100 - 120 times per minute), a shortened guidance voice that is a beep sound is output, and when cardiopulmonary resuscitation is being performed abnormally, a detailed guidance voice regarding whether the chest compression speed is slow or fast can be output.

[0026] Furthermore, if the number of executions does not exceed the critical number, a shortened guidance voice that is a beep sound matching a predetermined chest compression speed (100 - 120 times per minute) is output so that chest compressions continue, and when the number of executions exceeds the critical number, it can be made into a detailed guidance voice so that chest compressions are not performed further.

Brief Description of the Drawings

[0027] [Figure 1] [[ID=2�]]It is an exemplary diagram of a guidance device for cardiopulmonary resuscitation execution perception according to the present invention. [[ID=۲۶]] [Figure 2] It is an exemplary diagram of an output signal for cardiopulmonary resuscitation. [Figure 3] [[ID=]]It is an exemplary diagram of an output signal for chest compression speed. [Figure 4] It is a control block diagram of a guidance device for cardiopulmonary resuscitation execution perception. [Figure 5] This is an overall operational diagram of the guidance method based on the detection of cardiopulmonary resuscitation (CPR) execution. [Figure 6] This is a flowchart of the first embodiment of the guidance method based on the detection of cardiopulmonary resuscitation execution according to the present invention. [Figure 7] This is a flowchart of the second embodiment of the guidance method based on the detection of cardiopulmonary resuscitation (CPR) execution. [Figure 8] This is a flowchart of the third embodiment of the guidance method based on the detection of cardiopulmonary resuscitation (CPR) execution. [Figure 9] This is a flowchart of the fourth embodiment of the guidance method based on the detection of cardiopulmonary resuscitation (CPR) execution. [Figure 10] This is a flowchart of the fifth embodiment of the guidance method based on the detection of cardiopulmonary resuscitation (CPR) execution. [Modes for carrying out the invention]

[0028] A guidance device 1 based on the detection of cardiopulmonary resuscitation execution according to a preferred embodiment of the present invention will be described in detail below with reference to the attached drawings.

[0029] Figure 1 is an illustrative diagram of the guidance device 1 for detecting the execution of cardiopulmonary resuscitation according to the present invention, Figure 2 is an illustrative diagram of the output signal for cardiopulmonary resuscitation, Figure 3 is an illustrative diagram of the output signal for chest compression velocity, and Figure 4 is a control block diagram of the guidance device 1 for detecting the execution of cardiopulmonary resuscitation.

[0030] Referring to Figures 1 to 4, the configuration of the guidance device 1, which detects the execution of cardiopulmonary resuscitation, will be explained.

[0031] The guidance device 1, which detects the execution of cardiopulmonary resuscitation, includes an electrode pad 10, a signal supply unit 20, a differential amplifier unit 30, a rectifier unit 40, an amplification unit 50, a filter unit 60, a speaker 70, a display unit 80, a user input unit 90, and a control unit 100.

[0032] The electrode pad 10 is a pair of components that are attached to the patient's body. The electrode pad 10 includes a first electrode pad 11 and a second electrode pad 12.

[0033] The first electrode pad 11 is attached to a region of the patient's chest and transmits a signal that changes due to chest compression, provided by the signal supply unit 20, to the differential amplifier unit 30.

[0034] The second electrode pad 12 is attached to an area of ​​the patient's chest opposite to the area where the first electrode pad 11 is attached, centered on the patient's heart, and transmits the signal that changes due to chest compression, provided by the signal supply unit 20, to the differential amplifier unit 30.

[0035] The signal supply unit 20 provides a signal of a constant intensity to the pair of electrode pads 10.

[0036] The differential amplifier unit 30 is connected to a pair of electrode pads 10 and generates an amplified signal proportional to the difference between the input signals at both ends provided by the signal supply unit 20. The input signals received by the pair of electrode pads 10 change in amplitude due to chest compressions by the rescuer, and this is amplified.

[0037] The rectifier unit 40 converts alternating current (AC), which periodically changes direction, into direct current (DC), which flows in only one direction.

[0038] The amplification unit 50 amplifies the DC signal converted by the rectifier unit 40.

[0039] The filter unit 60 filters the signal amplified by the amplification unit 50 to remove noise and transmits it to the control unit 100.

[0040] Speaker 70 outputs voice guidance regarding cardiopulmonary resuscitation (CPR).

[0041] The display unit 80 displays an image based on an image signal processed by image processing. The implementation method of the display unit 80 is not limited and can be implemented using various display methods such as liquid crystal, plasma, light-emitting diode, organic light-emitting diode, surface conduction electron gun, carbon nanotube, and nanocrystal.

[0042] The display unit 80 may include additional configurations depending on its implementation method. For example, if the display unit 80 is a liquid crystal display, it includes a liquid crystal display panel (not shown), a backlight unit (not shown) that supplies light to it, and a panel drive board (not shown) that drives the panel (not shown). The display unit 80 can display the voice recognition result as information for the recognized voice. Here, the voice recognition result can be displayed in various forms such as text, graphics, and icons, and the text includes characters and numbers. The display unit 80 can further display candidate commands and application information based on the voice recognition result. The user can confirm whether the voice was correctly recognized from the voice recognition result displayed on the display unit 80, and can also operate the user input unit 90 provided on the remote control to select a command corresponding to the voice spoken by the user from the displayed candidate commands, or select and confirm information related to the voice recognition result.

[0043] The user input unit 90 consists of input means that allow the user to input user commands. The user input unit 90 receives touch input from the user or remote input from the user using a remote controller and transmits it to the corresponding control unit 100. The user input unit 90 also receives voice input spoken by the user and transmits the voice signal to the control unit 100. In this case, the user input unit 90 can be implemented as, for example, a microphone. The user input unit 90 can also independently perform signal processing on the received voice signal. However, the user input forms that the user input unit 90 can receive are not limited to these, and it can also receive user input such as motion recognition.

[0044] The control unit 100 stores the normal speed range for multiple amplified signals generated by the differential amplifier 30, and can determine whether or not cardiopulmonary resuscitation (CPR) was performed and whether or not it was performed correctly, based on the difference in amplitude size of the multiple amplified signals generated by the differential amplifier 30 and the speed of the multiple amplified signals generated by the differential amplifier 30.

[0045] The control unit 100 can store voice guidance on how to perform cardiopulmonary resuscitation (CPR), and when it receives an amplified signal generated by the differential amplifier 30, it can control the speaker 70 to output voice guidance on how to perform CPR.

[0046] The control unit 100 stores guidance voice messages regarding whether or not cardiopulmonary resuscitation (CPR) was performed and whether or not the CPR was performed correctly. Based on multiple amplified signals generated by the differential amplifier 30, if it is determined that CPR was not performed, the control unit controls the system to output the corresponding guidance voice message.

[0047] The control unit 100 stores abbreviated and detailed guidance voice messages regarding the presence or absence of normal cardiopulmonary resuscitation procedures. It controls the system so that abbreviated guidance voice messages are output when the speed of the multiple amplified signals generated by the differential amplifier 30 is within the normal speed range, and detailed guidance voice messages are output when the speed of the multiple amplified signals generated by the differential amplifier 30 deviates from the normal speed range.

[0048] The control unit 100 stores the critical number of times cardiopulmonary resuscitation (CPR) is performed, calculates the number of times CPR is performed based on multiple amplified signals generated by the differential amplifier unit 30, determines whether the calculated number of times exceeds the critical number, and controls the system to output either a shortened guidance voice or a detailed guidance voice based on the determination result.

[0049] The control unit 100 can monitor the rescuer's condition and the accuracy of the cardiopulmonary resuscitation (CPR) procedure in real time, and output detailed voice guidance in stages according to the basic stage, intermediate stage, and special circumstances of the CPR procedure.

[0050] The control unit 100 provides detailed voice guidance that is configured to provide basic guidance on chest compression position, compression depth, and compression speed during the basic stages of cardiopulmonary resuscitation, to evaluate compression depth and speed in real time during the intermediate stages and provide feedback if they deviate from the normal range, and to provide immediate guidance in special situations such as the rescuer's exhaustion, inaccurate hand positioning, or inconsistent compression rhythm.

[0051] The control unit 100 attaches a pressure sensor to the chest compression site during cardiopulmonary resuscitation to measure the pressure generated during cardiopulmonary resuscitation in real time, calculates the compression depth and velocity based on the data collected by the pressure sensor, and converts the calculated results into audio and visual feedback.

[0052] Here, the pressure sensor can be configured by selecting one of the following: a piezoresistive pressure sensor, a piezoelectric sensor, or a capacitive pressure sensor.

[0053] The control unit 100 can determine whether or not cardiopulmonary resuscitation (CPR) is being performed and whether or not it can be performed successfully, based on the pressure data sensed by the pressure sensor.

[0054] Based on the data collected from the pressure sensor, the control unit 100 can immediately provide the rescuer with voice and visual guidance via the speaker and display unit if the compression depth is insufficient, excessive, or if the compression speed deviates from the normal range.

[0055] In the cardiopulmonary resuscitation (CPR) execution detection guidance device 1 according to the present invention, the abbreviated guidance voice provides a simple metronome signal sound to enable the rescuer to maintain a predetermined chest compression rate and perform cardiopulmonary resuscitation (CPR) effectively. A simple signal sound, such as a "beef" sound, is repeatedly output to help the rescuer maintain a rhythm in accordance with a predetermined chest compression rate (100-120 compressions per minute). The abbreviated guidance voice is simply configured to maintain only the compression rhythm without further explanation or detailed guidance.

[0056] On the other hand, the detailed voice guidance is designed to monitor the rescuer's condition and the accuracy of their actions in real time during the cardiopulmonary resuscitation (CPR) procedure and provide guidance step by step. This system provides optimal feedback to the rescuer during the basic, intermediate, and special stages of CPR. In the basic stage, the rescuer is provided with basic guidelines for initiating CPR. For example, it provides instructions on compression position such as, "Press on the central area between both nipples, about one-third of the way down the sternum," along with compression depth instructions such as, "Press about 5 cm or more for adults, and about 5 cm for children," and compression rate instructions such as, "Maintain a rate of about 100-120 breaths per minute." Such basic guidance is concise and clear, making it easy for beginners to understand and supporting the basic stages of CPR.

[0057] During the intermediate stages of cardiopulmonary resuscitation (CPR), the rescuer's chest compression rate and depth are monitored in real time, and immediate feedback is provided if they deviate from the guidelines. For example, if the compression rate is too fast, a message such as "Your chest compression rate is too fast. Adjust to 120 compressions per minute or less" is provided, and if the rate is too slow, feedback such as "Your chest compression rate is too slow. Maintain a rate of 100 compressions per minute or more" is output. Also, if the compression depth is insufficient or excessive, a message such as "Your compression depth is insufficient. Press the chest at least 5 cm" or "Your compression depth is too deep. Adjust your compressions appropriately" is provided, respectively. During CPR, the chest may not fully relax, so an additional voice message such as "After chest compressions, fully relax the chest so that the heart can fill with blood" is output. This kind of real-time feedback helps rescuers to perform CPR correctly and sustainably.

[0058] Cardiopulmonary resuscitation (CPR) is a high-intensity task, and its quality can deteriorate due to the rescuer's exhaustion. To prevent this, detailed voice guidance periodically provides instructions for managing physical strength. Messages such as "Please rotate rescuers every two minutes" or "If you feel fatigued, immediately switch with another rescuer to maintain compression quality" are output to prevent the rescuer from becoming overly exhausted and compromising. The AED display allows users to check compression depth and speed in real time, and voice guidance such as "Compression depth is insufficient. Compress deeper" or "Compression depth is too deep. Adjust compression" is also provided.

[0059] To determine the appropriateness of compression depth, pressure sensors can be placed at the chest compression site during cardiopulmonary resuscitation (CPR) to measure the pressure generated during CPR in real time. Pressure sensors can be selected from piezoresistive, piezoelectric, or capacitive pressure sensors. Piezoresistive sensors sense pressure by changing their resistance in response to pressure, piezoelectric sensors generate an electrical signal in response to pressure, and capacitive pressure sensors convert a change in capacitance in response to pressure into a signal. Such sensors should have a measurement range of 0-100 mmHg and a fast response speed, and should be suitable for the general pressure range of CPR.

[0060] When installing a pressure sensor at the chest compression site, the sensor placement must consider accuracy and durability. Attaching the sensor to the center of the chest compression site ensures the accuracy of pressure data, and it should be designed with a flexible structure to prevent interference during cardiopulmonary resuscitation (CPR). Furthermore, to prevent interference between the sensor and surrounding electrical systems, an appropriate shielding layer should be introduced to minimize signal interference problems. Data collected by the pressure sensor should be integrated into a differential amplifier and control unit. The differential amplifier amplifies the pressure data to prevent signal loss, and the control unit analyzes this data to evaluate the quality of CPR in real time and provide appropriate feedback to the rescuer.

[0061] The pressure sensor is a core component of the cardiopulmonary resuscitation (CPR) execution detection guidance device of the present invention, and can operate in connection with the differential amplifier and control unit. The sensor attached to the chest compression site senses pressure in real time, converts it into an electrical signal, amplifies the signal in the differential amplifier, and then processes it in the rectifier and filter units. The control unit analyzes the processed signal to calculate the compression depth and velocity and determines whether the CPR can be performed successfully. Depending on the analysis results, the speaker and display unit provide voice and visual feedback to the rescuer. The pressure sensor, in conjunction with the electrode pads, can enhance the effectiveness of CPR by monitoring the quality of CPR in real time and providing feedback.

[0062] Even in special situations, the detailed voice guidance provides immediate feedback. For example, if the hand position is incorrect, it will output guidance such as, "Press with the base of your palms. Do not let your fingers touch the chest." If the compression position is off, it will provide feedback such as, "Adjust the compression position to the center between the nipples." In addition, if there is a problem with the compression rhythm, it will output guidance such as, "Maintain a consistent rhythm. Perform chest compressions in accordance with the metronome signal," maximizing the effectiveness of cardiopulmonary resuscitation (CPR).

[0063] Because children and infants have different structural characteristics than adults, differentiated instructions for them are also included in the detailed voice guidance. For children, the guidance is "For children, press on the center of the sternum with one hand or two fingers. Maintain a depth of approximately 5 cm." For infants, the detailed guidance is "For infants, use two fingers to press on the center of the sternum to a depth of approximately 4 cm. Maintain a rate of 100-120 presses per minute." This is customized guidance to ensure the safety and effectiveness of cardiopulmonary resuscitation (CPR) for children and infants.

[0064] Finally, integrating the AED display with voice guidance helps to visually and audibly monitor the quality of cardiopulmonary resuscitation (CPR). By providing messages such as "Check the AED screen and maintain compression rate and depth" or "Compression rate has deviated from the appropriate range. Please adjust as instructed," rescuers can immediately check and improve the quality of their CPR execution.

[0065] In conclusion, detailed voice guidance provides basic instructions during the initial stages of cardiopulmonary resuscitation (CPR), maintains quality through real-time feedback during the intermediate stages, and offers guidance for immediate problem-solving in special situations. This supports rescuers in performing CPR correctly, maximizing the efficiency and accuracy of CPR.

[0066] Figure 5 is an overall operational diagram of the guidance method based on the detection of cardiopulmonary resuscitation (CPR) execution.

[0067] The rescuer performs cardiopulmonary resuscitation (CPR) while compressing the patient's chest (S1).

[0068] When the control unit 100 determines that there is no difference in the amplitude of the multiple amplified signals generated by the differential amplifier unit 30, it determines that the rescuer is not performing chest compressions and outputs a voice guidance message saying "Please continue chest compressions" (S2).

[0069] Determine whether the rescuer's chest compression rate is within the normal range of 110 ± 20% per minute (S3).

[0070] If the rescuer's chest compression rate is within the normal rate range, a shortened voice guidance message is output (S4). Here, the shortened voice guidance message is a beep sound that is played in accordance with the chest compression rate (100-120 times per minute), and the rescuer can perform chest compressions in accordance with this beep sound, so that they can perform chest compressions at the correct rate.

[0071] If the chest compression rate exceeds 120 compressions per minute, which is within the normal range, while the rescuer is continuing to perform chest compressions, a detailed voice guidance message will be output to slow down a little. If the chest compression rate does not reach 120 compressions per minute, which is within the normal range, a detailed voice guidance message will be output to speed up a little (S5).

[0072] The system outputs voice guidance for the prescribed artificial respiration (S6).

[0073] Determine whether the number of cardiopulmonary resuscitation (CPR) procedures performed exceeds the critical number (S7).

[0074] If the number of cardiopulmonary resuscitation (CPR) attempts exceeds a critical number, an audio message is output instructing the system to stop CPR (S8).

[0075] If the number of cardiopulmonary resuscitation (CPR) procedures performed does not exceed the critical number, then the S5 stage will be continued.

[0076] In stage S3, if the rescuer's chest compression speed is not within the normal speed range, a detailed voice guidance message is output (S9).

[0077] Here, detailed voice guidance for cardiopulmonary resuscitation (CPR) can be output to inform non-expert rescuers of how to perform CPR (S10). Here, stage S10 can also be performed before performing CPR in stage S1.

[0078] If a non-professional rescuer continues to perform chest compressions and the compression rate exceeds 120 compressions per minute, which is within the normal range, a detailed voice guidance message will be output to slow down a little. If the compression rate does not reach 120 compressions per minute, which is within the normal range, a detailed voice guidance message will be output to speed up a little (S11).

[0079] The system outputs voice guidance for the prescribed artificial respiration (S12).

[0080] Determine whether the number of cardiopulmonary resuscitation (CPR) procedures performed exceeds the critical number (S13).

[0081] If the number of cardiopulmonary resuscitation (CPR) attempts exceeds a critical number, an audio message is output instructing the system to stop CPR (S14).

[0082] If the number of cardiopulmonary resuscitation (CPR) procedures performed does not exceed the critical number, then the S11 stage is continued.

[0083] Figure 6 is a flowchart of the first embodiment of the guidance method based on the detection of cardiopulmonary resuscitation execution according to the present invention.

[0084] The control unit 100 is connected to a pair of electrode pads 11 and 12 attached to the patient's body and stores voice guidance regarding the normal speed range for multiple amplified signals generated by a differential amplifier 30 that generates an amplified signal proportional to the difference between the input signals at both ends provided by the signal supply unit 20 (S21).

[0085] The control unit 100 determines whether or not cardiopulmonary resuscitation (CPR) was performed and whether or not the CPR was performed correctly, based on the rate of multiple amplified signals generated by the differential amplifier unit 30 (S22).

[0086] Figure 7 is a flowchart of a second embodiment of the guidance method based on the detection of cardiopulmonary resuscitation.

[0087] The control unit 100 is connected to a pair of electrode pads 11 and 12 attached to the patient's body and stores voice guidance regarding the normal speed range and how to perform cardiopulmonary resuscitation for multiple amplified signals generated by a differential amplifier 30 that generates an amplified signal proportional to the difference between the input signals at both ends provided by the signal supply unit 20 (S31).

[0088] The control unit 100 determines whether or not cardiopulmonary resuscitation (CPR) is performed and whether or not the CPR is performed correctly, based on the rate of multiple amplified signals generated by the differential amplifier unit 30 (S32).

[0089] When the control unit 100 receives the amplified signal generated by the differential amplifier unit 30, it outputs an audio guidance message on how to perform cardiopulmonary resuscitation (S33).

[0090] Figure 8 is a flowchart of a third embodiment of the guidance method based on the detection of cardiopulmonary resuscitation (CPR) execution.

[0091] The control unit 100 stores the normal speed range for multiple amplified signals generated by a differential amplifier 30, which is connected to a pair of electrode pads 11 and 12 attached to the patient's body and generates an amplified signal proportional to the difference between the input signals at both ends provided by the signal supply unit 20, as well as guidance voice regarding how to perform cardiopulmonary resuscitation, and guidance voice regarding whether or not cardiopulmonary resuscitation is performed and whether or not it is performed normally (S41).

[0092] The control unit 100 determines whether or not cardiopulmonary resuscitation (CPR) is performed and whether or not the CPR is performed normally, based on the rate of multiple amplified signals generated by the differential amplifier unit 30 (S42).

[0093] When the control unit 100 receives the amplified signal generated by the differential amplifier unit 30, it outputs an audio guidance message on how to perform cardiopulmonary resuscitation (S43).

[0094] If the control unit 100 determines, based on the rate of multiple amplified signals generated by the differential amplifier unit 30, that cardiopulmonary resuscitation (CPR) is not being performed, it outputs the corresponding guidance voice (S44).

[0095] Figure 9 is a flowchart of the fourth embodiment of the guidance method based on the detection of cardiopulmonary resuscitation.

[0096] The control unit 100 stores the normal speed range for multiple amplified signals generated by a differential amplifier 30 connected to a pair of electrode pads 11 and 12 attached to the patient's body, which generates an amplified signal proportional to the difference between the input signals at both ends provided by the signal supply unit 20, guidance voice regarding how to perform cardiopulmonary resuscitation, guidance voice regarding whether or not cardiopulmonary resuscitation is performed and whether or not it is performed normally, a shortened guidance voice and a detailed guidance voice regarding whether or not it is performed normally (S51).

[0097] The control unit 100 determines whether or not cardiopulmonary resuscitation (CPR) was performed and whether or not the CPR was performed correctly, based on the rate of multiple amplified signals generated by the differential amplifier unit 30 (S52).

[0098] When the control unit 100 receives the amplified signal generated by the differential amplifier unit 30, it outputs an audio guidance message on how to perform cardiopulmonary resuscitation (S53).

[0099] If the control unit 100 determines, based on the rate of multiple amplified signals generated by the differential amplifier unit 30, that cardiopulmonary resuscitation (CPR) is not being performed, it outputs the corresponding guidance voice (S54).

[0100] The control unit 100 outputs the shortened guidance voice when the speed of the multiple amplified signals generated by the differential amplifier unit 30 is within the normal speed range (S55).

[0101] The control unit 100 outputs the detailed guidance voice when the speed of the multiple amplified signals generated by the differential amplifier unit 30 deviates from the normal speed range (S56).

[0102] Figure 10 is a flowchart of the fifth embodiment of the guidance method based on the detection of cardiopulmonary resuscitation.

[0103] The control unit 100 stores the normal speed range for multiple amplified signals generated by a differential amplifier 30 connected to a pair of electrode pads 11 and 12 attached to the patient's body, which generates an amplified signal proportional to the difference between the input signals at both ends provided by the signal supply unit 20, guidance voice regarding how to perform cardiopulmonary resuscitation, guidance voice regarding whether or not cardiopulmonary resuscitation is performed and whether or not the cardiopulmonary resuscitation is performed normally, a shortened guidance voice regarding whether or not the cardiopulmonary resuscitation is performed normally, a detailed guidance voice, and the critical number of times for cardiopulmonary resuscitation is performed (S61).

[0104] The control unit 100 determines whether or not cardiopulmonary resuscitation (CPR) is performed and whether or not the CPR is performed correctly, based on the rate of multiple amplified signals generated by the differential amplifier unit 30 (S62).

[0105] When the control unit 100 receives the amplified signal generated by the differential amplifier 30, it outputs an audio guidance message on how to perform cardiopulmonary resuscitation (S63).

[0106] If the control unit 100 determines, based on the rate of multiple amplified signals generated by the differential amplifier unit 30, that cardiopulmonary resuscitation (CPR) is not being performed, it outputs the corresponding guidance voice (S64).

[0107] The control unit 100 outputs the shortened guidance voice when the speed of the multiple amplified signals generated by the differential amplifier unit 30 is within the normal speed range (S65).

[0108] The control unit 100 outputs the detailed guidance voice when the speed of the multiple amplified signals generated by the differential amplifier unit 30 deviates from the normal speed range (S66).

[0109] The control unit 100 calculates the number of times cardiopulmonary resuscitation should be performed based on the multiple amplified signals generated by the differential amplifier unit 30 (S67).

[0110] The control unit 100 determines whether the calculated number of executions exceeds the critical number (S68).

[0111] The control unit 100 outputs one of the following: the judgment result, a shortened guidance voice, or a detailed guidance voice (S69).

[0112] Here, we will explain the measurement method using changes in chest impedance with reference to Figures 1 to 3.

[0113] A carrier signal in the range of 40 to 80 kHz is sent to both ends of a pair of electrode pads 11 and 12, and the differential amplifier 30 generates an amplified signal proportional to the difference between the input signals at both ends, and this signal is converted into a DC signal by the rectifier 40.

[0114] When cardiopulmonary resuscitation (CPR) is performed, the value of the DC signal changes due to the change in chest impedance at both ends of the pair of electrode pads 11 and 12. From this change, it is possible to confirm whether CPR was performed and the chest compression rate during CPR.

[0115] The output signal of the filter unit for cardiopulmonary resuscitation is shown in Figure 2.

[0116] This explains the criteria for determining whether cardiopulmonary resuscitation (CPR) was performed correctly.

[0117] If chest compressions are not performed within the set time for chest compression monitoring (set range: 1 second to 60 seconds) at the time of cardiopulmonary resuscitation (CPR), a detailed voice guidance will be provided. Once chest compressions are performed, the speed of the compressions will be checked and evaluated to see if they are being performed at a rate of 100 to 120 compressions per minute. If the compressions are performed within the range of 110 compressions per minute ± 20% (this standard can be changed at any time according to CPR guidelines, the relevant country, or customer requests), a shortened voice guidance will be provided. If the compressions are outside the 110 ± 20% range, a detailed voice guidance will be provided.

[0118] The conditions for detailed and abbreviated guidance are as follows: If cardiopulmonary resuscitation (CPR) is not performed (chest compressions) within the specified monitoring time, detailed guidance is given; if the speed of CPR (chest compressions) deviates from the specified speed range, detailed guidance is given; and if the speed of CPR (chest compressions) is within the specified speed range, abbreviated guidance is given.

[0119] Once the detailed and abbreviated voice guidance options are determined, the voice guidance will be provided accordingly, and a metronome function will sound a beep in time with the predetermined chest compression rate (100-120 times per minute).

[0120] When a rescuer performs chest compressions in accordance with a metronome, the average compression rate is calculated using the input signal (T1 + T2 + Tn) / Tn. If this average rate is faster than 120 compressions per minute, voice guidance coaching is given to slow down chest compressions. If it is slower than 100 compressions per minute, voice guidance coaching is given to speed up chest compressions.

[0121] Furthermore, chest compression rate can be monitored in real time through the AED screen. In emergency situations, chest compression rate coaching should be concise, and voice guidance can be provided using simple expressions such as "faster" or "slower." When providing cardiopulmonary resuscitation (CPR) feedback using defibrillation pads, no judgment should be made regarding compression depth.

[0122] Other modifiable embodiments of the above-described embodiment will be explained. The cardiopulmonary resuscitation (CPR) execution detection guidance device may further include a camera that films the patient. A pair of electrode pads are attached to the patient, and when the camera is positioned facing the patient, a signal provider generates and provides a signal to the pair of electrode pads, and filming begins. The camera can film the rescuer performing CPR, and a control unit can save the filmed footage.

[0123] The system further includes a display unit for displaying images related to cardiopulmonary resuscitation (CPR). The control unit stores the normal chest compression postures of multiple rescuers performing CPR, determines whether the current chest compression posture of a rescuer performing CPR is similar to at least one of the multiple normal chest compression postures, and if the current chest compression posture of a rescuer performing CPR is not similar to the predetermined level, it can display images related to normal chest compression postures for the rescuer to watch and imitate.

[0124] The control unit can identify the chest compression area in the captured patient video, and if it determines that the rescuer currently performing cardiopulmonary resuscitation is shifting their chest compression area away from the identified area, it can output an audio guidance message indicating the identified chest compression area. The control unit can also display the identified chest compression area on the display unit to help the rescuer perform chest compressions accurately.

[0125] With the aforementioned guidance device 1 and guidance method for detecting the execution of cardiopulmonary resuscitation, when a pair of electrode pads are attached to the patient's chest, the presence or absence of cardiopulmonary resuscitation is determined based on the difference in the amplitude sizes of multiple amplified signals generated by the differential amplifier. Then, the presence or absence of normal cardiopulmonary resuscitation is determined based on whether the speed of the amplified signals from the differential amplifier is at a normal speed, and voice guidance is provided accordingly.

[0126] Furthermore, since it guides non-professional rescuers on the procedures of cardiopulmonary resuscitation (CPR), even non-professional rescuers can easily perform CPR.

[0127] Furthermore, if there is no difference in the input signals from the pair of electrode pads, it indicates that cardiopulmonary resuscitation (CPR) is not being performed, and therefore, it can output voice guidance on how to perform CPR.

[0128] Furthermore, if cardiopulmonary resuscitation (CPR) is performed correctly, a short, guided voice message (a beep) will be output in accordance with a predetermined chest compression rate (100-120 compressions per minute). If CPR is performed abnormally, a detailed voice message will be output indicating whether the chest compression rate is too slow or too fast.

[0129] Furthermore, if the number of executions does not exceed a critical number, a shortened guidance voice, which is a beep sound that matches a predetermined chest compression rate (100 to 120 times per minute), is output to ensure that chest compressions continue. If the number of executions exceeds the critical number, a detailed guidance voice is output to prevent further chest compressions. [Explanation of Symbols]

[0130] 1: Guidance device based on detection of cardiopulmonary resuscitation (CPR) execution 10: Electrode pads 11: First electrode pad 12: Second electrode pad 20: Signal providing section 30: Differential Amplifier 40: Rectifier 50: Amplification section 60: Filter section 70: Speakers 80: Display section 90: User input section 100: Control Unit

Claims

1. A guidance device that detects the execution of cardiopulmonary resuscitation, A pair of electrode pads attached to the patient's body, A signal providing unit that provides signals to the pair of electrode pads, A differential amplifier unit connected to the pair of electrode pads and generating an amplified signal proportional to the difference between the input signals at both ends provided by the signal supply unit, A guidance device for detecting the execution of cardiopulmonary resuscitation (CPR), characterized by including a control unit that stores a normal speed range for a plurality of amplified signals generated by the differential amplifier unit, and determines whether or not CPR is performed and whether or not CPR is performed normally based on the plurality of amplified signals generated by the differential amplifier unit and the speed for the plurality of amplified signals generated by the differential amplifier unit.

2. Furthermore, it includes a speaker that outputs voice guidance on cardiopulmonary resuscitation. The control unit stores guidance audio regarding the method of performing cardiopulmonary resuscitation, and controls the speaker so that when an amplified signal generated by the differential amplifier is received, the guidance audio regarding the method of performing cardiopulmonary resuscitation is output, as described in claim 1.

3. The control unit stores guidance voices regarding whether or not cardiopulmonary resuscitation (CPR) has been performed and whether or not the CPR has been performed correctly, and controls the system so that the corresponding guidance voice is output when it is determined that CPR has not been performed based on a plurality of amplified signals generated by the differential amplifier. This is the guidance device for detecting the performance of cardiopulmonary resuscitation according to claim 2.

4. The control unit stores a shortened guidance voice and a detailed guidance voice regarding the presence or absence of normal cardiopulmonary resuscitation, and controls the device to output the shortened guidance voice when the speed of the multiple amplified signals generated by the differential amplifier is within the normal speed range, and to output the detailed guidance voice when the speed of the multiple amplified signals generated by the differential amplifier deviates from the normal speed range, as described in claim 3.

5. The control unit stores the critical number of times cardiopulmonary resuscitation (CPR) is performed, calculates the number of times CPR is performed based on a plurality of amplified signals generated by the differential amplifier, determines whether the calculated number of times exceeds the critical number, and controls the system so that either the shortened guidance voice or the detailed guidance voice is output, as described in claim 4.

6. The control unit monitors the rescuer's condition and the accuracy of the execution of cardiopulmonary resuscitation in real time during the execution of cardiopulmonary resuscitation, and outputs detailed guidance voices in stages according to the basic stage, intermediate stage, and special circumstances of cardiopulmonary resuscitation, as described in claim 1.

7. The control unit provides detailed guidance voice, which is configured to provide basic guidance for chest compression position, compression depth, and compression speed during the basic stages of cardiopulmonary resuscitation, evaluate compression depth and speed in real time during the intermediate stages and provide feedback if they deviate from the normal range, and provide immediate guidance in special situations such as exhaustion of the rescuer, inaccuracy of hand position, or mismatch in compression rhythm, as described in claim 1.

8. The control unit attaches a pressure sensor to the chest compression site for measuring the pressure generated during cardiopulmonary resuscitation in real time, calculates the compression depth and velocity based on the data collected by the pressure sensor, and converts the calculated results into audio and visual feedback, as described in claim 7, for guidance devices that detect the execution of cardiopulmonary resuscitation.

9. The pressure sensor is configured by selecting one of the following: a piezoresistive pressure sensor, a piezoelectric sensor, or a capacitive pressure sensor. The guidance device for detecting the execution of cardiopulmonary resuscitation according to claim 8, characterized in that the control unit determines whether or not cardiopulmonary resuscitation is being performed and whether or not it can be performed normally based on the pressure data sensed by the pressure sensor.

10. The guidance device for detecting the execution of cardiopulmonary resuscitation according to claim 9, characterized in that the control unit immediately provides voice and visual guidance to the rescuer via the speaker and display unit if the compression depth is insufficient or excessive, or if the compression speed deviates from the normal range, based on the data collected from the pressure sensor.

11. A method of guidance based on the detection of the execution of cardiopulmonary resuscitation, A step of saving the normal speed range for multiple amplified signals generated by a differential amplifier unit, which is connected to a pair of electrode pads attached to the patient's body and generates an amplified signal proportional to the difference between the input signals at both ends provided by the signal supply unit, A guidance method for detecting the execution of cardiopulmonary resuscitation (CPR), characterized by including a step of determining whether or not CPR is performed and whether or not CPR is performed normally, based on the speed of a plurality of amplified signals generated by the differential amplifier.

12. Furthermore, there is a step to save an audio guide on how to perform cardiopulmonary resuscitation, The method for guiding a cardiopulmonary resuscitation based on detection of the execution of cardiopulmonary resuscitation according to claim 11, further comprising the step of outputting an audio guidance regarding the method of performing cardiopulmonary resuscitation when an amplified signal generated by the differential amplifier is received.

13. Furthermore, there is a stage in which the system saves audio guidance regarding whether or not cardiopulmonary resuscitation (CPR) was performed and whether or not it was performed correctly. The guidance method for detecting the execution of cardiopulmonary resuscitation according to claim 12, further comprising the step of outputting a guidance voice when it is determined that cardiopulmonary resuscitation is not being performed based on the rate of multiple amplified signals generated by the differential amplifier.

14. Furthermore, the system saves both a shortened and a detailed voice guidance message regarding the presence or absence of normal cardiopulmonary resuscitation (CPR) procedures. If the speed of the multiple amplified signals generated by the differential amplifier is within the normal speed range, the step of outputting the shortened guidance voice is performed. The guidance method for detecting the execution of cardiopulmonary resuscitation according to claim 13, further comprising the step of outputting the detailed guidance voice when the speed of the multiple amplified signals generated by the differential amplifier shifts from the normal speed range.

15. Furthermore, there is a step to preserve the critical number of resuscitation sessions, A step of calculating the number of times cardiopulmonary resuscitation should be performed based on a plurality of amplified signals generated by the differential amplifier, A step of determining whether the calculated number of executions exceeds the critical number, The guidance method for detecting the execution of cardiopulmonary resuscitation according to claim 14, characterized in that it includes the steps of determining the result and outputting either the shortened guidance voice or the detailed guidance voice.

Images