System for providing feedback about quality of real-time chest compressions for cardiopulmonary resuscitation, and method therefor

Abstract

The present invention relates to a system for providing feedback about the quality of real-time chest compressions for cardiopulmonary resuscitation, and a method therefor. According to the present invention, the system for providing feedback about the quality of real-time chest compressions for cardiopulmonary resuscitation comprises: one or two gloves; a first sensor which is attached to and detached from one side of the glove so as to measure the acceleration of chest compressions by a performer in real time; a second sensor which is attached to and detached from the other side of the glove so as to measure the pressure of the chest compressions by the performer in real time; and a control device which receives, in real time, the acceleration of chest compressions and the pressure of the chest compressions measured by the first sensor and the second sensor, so as to determine the current step and state of the chest compressions according to an algorithm, and which displays feedback about the determined quality of the chest compressions.

Description

Real-time cardiopulmonary resuscitation chest compression quality feedback system and method thereof

[0001] The present invention relates to a real-time cardiopulmonary resuscitation chest compression quality feedback system and method thereof, and more specifically, to a real-time cardiopulmonary resuscitation chest compression quality feedback system and method thereof that evaluates the chest compression quality of a performer performing cardiopulmonary resuscitation and provides feedback by attaching a plurality of sensors to the performer's medical gloves.

[0002] Acute cardiac arrest is a disease with a low survival rate, and it is important to assist in restoring spontaneous blood circulation and breathing in cardiac arrest patients through cardiopulmonary resuscitation (CPR).

[0003] At this time, the person performing CPR must perform high-quality CPR consisting of appropriate chest compression depth and speed, and complete relaxation of the compressed chest.

[0004] In response, Quality cardiopulmonary resuscitation (QCPR) devices are being developed to provide high-quality CPR to cardiac arrest patients. However, they cause discomfort to the palms and wrists of practitioners performing CPR, and as the time of performing CPR increases, the pain in the practitioner's hands increases, which limits their usability.

[0005] In addition, CPR feedback equipment is sold as an accessory to a specific company's patient monitoring equipment, making it difficult to purchase separately, and its low portability limits its expandability, such as for removing automated external defibrillators (PADs) in small medical institutions and public places.

[0006] The technology underlying the present invention is described in Korean Patent Publication No. 10-2019-0114265 (published on October 10, 2019).

[0007] Thus, according to the present invention, a real-time cardiopulmonary resuscitation chest compression quality feedback system and method are provided that evaluates the quality of chest compression of a performer performing cardiopulmonary resuscitation and provides feedback by attaching a plurality of sensors to the performer's medical gloves.

[0008] According to an embodiment of the present invention for achieving such a technical task, a real-time CPR chest compression quality feedback system comprises: one or two gloves; a first sensor detachably attached to one side of the gloves to measure chest compression acceleration of a performer in real time; a second sensor detachably attached to the other side of the gloves to measure chest compression pressure of the performer in real time; and a control device that receives chest compression acceleration and chest compression pressure measured by the first sensor and the second sensor in real time, determines the current chest compression stage and state according to an algorithm, and displays the determined chest compression quality feedback.

[0009] The above control device determines the start and end times of chest compression using the chest compression pressure measured during the process of performing cardiopulmonary resuscitation, calculates the speed of chest compression or displacement of chest compression based on the chest compression acceleration, and determines the compression period, relaxation period, and rest period of cardiopulmonary resuscitation, and can provide feedback on the compression period, relaxation period, and rest period.

[0010] The above control device may determine a point in time when the measured chest compression pressure increases as the start point of the chest compression, determine a point in time when the direction of the calculated chest compression changes and the displacement of the chest compression begins to decrease as the start point of the relaxation period, determine a point in time when the calculated chest compression speed and displacement of the chest compression become 0 as the end point of the relaxation period, and determine a period from the end point of the relaxation period to the start point of the next chest compression as the rest period.

[0011] The above control device calculates how many times chest compressions are currently performed per minute, calculates the relaxation speed of chest compressions by calculating the time of relaxation and the depth of chest compressions, and can evaluate the adequacy of relaxation using the pressure of the chest compressions measured during the pause of cardiopulmonary resuscitation.

[0012] The above control device can provide at least one of the time of cardiopulmonary resuscitation, the depth of chest compression, the speed of chest compression, the speed of chest compression relaxation, and whether or not chest compression is completely relaxed through voice or video.

[0013] The first sensor is an acceleration sensor that can be attached to the back of the hand of the glove, and the second sensor is a pressure sensor that can be attached to the palm of the glove.

[0014] A real-time CPR chest compression quality feedback method performed by a quality feedback system according to another embodiment of the present invention may include: a step of measuring a chest compression acceleration of a performer in real time; a step of measuring a chest compression pressure of the performer in real time; and a step of receiving the measured chest compression acceleration and chest compression pressure in real time, determining a current chest compression stage and state according to an algorithm, and displaying the determined chest compression quality feedback.

[0015] In this way, according to the present invention, it is possible to provide feedback on the quality of chest compression in real time, thereby assisting in providing high-quality cardiopulmonary resuscitation in the field.

[0016] Additionally, by attaching multiple sensors detachably to the glove, chest compression quality feedback can be provided at low cost and regardless of location.

[0017] Additionally, it can help emergency medical workers who primarily perform CPR to continue providing high-quality CPR by not putting additional strain on the body by not requiring them to wear additional equipment.

[0018] FIG. 1 is a configuration diagram of a real-time cardiopulmonary resuscitation chest compression quality system according to one embodiment of the present invention.

[0019] Figure 2 is a flowchart of a real-time cardiopulmonary resuscitation chest compression quality method according to another embodiment of the present invention.

[0020] FIG. 3 is a drawing showing an example of two gloves in which a first sensor and a second sensor are attached according to another embodiment of the present invention.

[0021] FIG. 4 is a drawing showing an example in which a first sensor and a second sensor are attached to one glove according to another embodiment of the present invention.

[0022] FIG. 5 is a diagram illustrating an algorithm for determining the current chest compression stage and state by a control device according to another embodiment of the present invention.

[0023] Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the attached drawings. In this process, the thickness of lines and the sizes of components depicted in the drawings may be exaggerated for clarity and convenience of explanation.

[0024] Furthermore, the terms described below are defined based on their functions within the present invention, and may vary depending on the intent or custom of the user or operator. Therefore, the definitions of these terms should be based on the overall content of this specification.

[0025] FIG. 1 is a configuration diagram of a real-time cardiopulmonary resuscitation chest compression quality system according to one embodiment of the present invention.

[0026] As illustrated in FIG. 1, the chest compression quality system (100) includes one or two gloves (110), a first sensor (120) detachably attached to one side of the gloves (110) to measure the chest compression acceleration of the performer in real time, a second sensor (130) detachably attached to the other side of the gloves (110) to measure the chest compression pressure of the performer in real time, and a control device (microcontroller) (140) wirelessly connected to the first sensor (120) and the second sensor (130) to display quality feedback.

[0027] First, the first sensor (120) is an accelerometer that is attached to the back of the hand of the glove.

[0028] Specifically, the first sensor (120) can be detachably attached to a portion of the back of the hand of the glove (110) to measure the chest compression acceleration of the performer in real time. At this time, the first sensor (120) can be detachably attached to a portion of the back of the hand of the performer's left or right hand to measure the chest compression acceleration in real time.

[0029] Next, the second sensor (130) is attached to the palm area of ​​the glove as a pressure sensor (force sensing resistor, FSR).

[0030] Specifically, the second sensor (130) can be detachably attached to a portion of the palm of the glove (110) that comes into contact with the chest of a cardiac arrest patient to measure the chest compression pressure of the performer in real time.

[0031] Next, the control device (140) receives the chest compression acceleration and pressure measured by the first sensor (120) and the second sensor (130) in real time, determines the current chest compression stage and state according to an algorithm, and displays the determined chest compression quality feedback. At this time, the algorithm is described in detail below with reference to FIG. 5.

[0032] Specifically, the control device (140) calculates how many times chest compressions are currently performed per minute, calculates the relaxation velocity of chest compression (Chest compression release velocity, CCRV) by calculating the time of the diastole and the depth of chest compression, and can evaluate the adequacy of the relaxation using the pressure of chest compression measured during the pause of CPR. At this time, the depth of chest compression is the displacement of chest compression during the diastole, and the adequacy of the relaxation can be either complete relaxation or incomplete relaxation.

[0033] In addition, the control device (140) can determine the start and end times of chest compression using the chest compression pressure measured during the process of performing CPR, calculate the speed of chest compression or the displacement of chest compression based on the chest compression acceleration, determine the compression phase, relaxation phase, and rest phase of CPR, and provide feedback on the compression phase, relaxation phase, and rest phase. At this time, the control device (140) can provide the feedback in the form of a video, voice (e.g., "Do not apply pressure to the patient's chest in an incompletely relaxed state"), or an alarm sound (e.g., if the speed of chest compression is slow, an alarm sound 'beep-' sounds, and if the speed of chest compression is fast, an alarm sound 'beep beep-' sounds repeatedly).

[0034] In addition, the control device (140) may determine the point in time when the measured chest compression pressure increases as the start point of chest compression, determine the point in time when the direction of the calculated chest compression changes and the displacement of the chest compression begins to decrease as the start point of relaxation, determine the point in time when the speed of the calculated chest compression and the displacement of the chest compression become 0 as the end point of relaxation, and determine the period from the end point of relaxation to the start point of the next chest compression as the rest period.

[0035] In addition, the control device (140) can provide at least one of the duration of CPR, the depth of chest compression, the speed of chest compression, the speed of chest compression relaxation, and whether or not chest compression is complete, through audio or video. In this case, the depth of chest compression is the displacement of chest compression in the diastole, and the adequacy of relaxation can be either complete relaxation or incomplete relaxation.

[0036] Hereinafter, a real-time cardiopulmonary resuscitation chest compression quality method performed by a quality system is described in more detail with reference to FIGS. 2 to 5.

[0037] Figure 2 is a flowchart of a real-time cardiopulmonary resuscitation chest compression quality method according to another embodiment of the present invention.

[0038] As shown in Fig. 2, the first sensor (120) measures the chest compression acceleration of the performer in real time (S210).

[0039] Specifically, the first sensor (120) can be attached to a portion of the back of the hand of the glove (110) and measure the acceleration of the performer's chest compression in real time.

[0040] According to one embodiment of the present invention, the first sensor (120) is a sensor having a size of 51.3×36.0×15.0 mm, a weight of 68 g, a measurement acceleration range of ±16 g, an error rate of 0.01 g, and a frequency of 100 Hz.

[0041] Next, the second sensor (130) measures the chest compression pressure of the performer in real time (S220).

[0042] Specifically, the second sensor (130) can be detachably attached to a portion of the palm of the glove (110) that comes into contact with the chest of a cardiac arrest patient to measure the chest compression pressure of the performer in real time.

[0043] According to one embodiment of the present invention, the second sensor (130) is a sensor that measures a thickness of 0.53 mm and a force of 0.2 to 20 N, and has an error rate of ±2%.

[0044] FIG. 3 is a drawing showing an example in which a first sensor and a second sensor are attached to two gloves according to another embodiment of the present invention, and FIG. 4 is a drawing showing an example in which a first sensor and a second sensor are attached to one glove according to another embodiment of the present invention.

[0045] As shown in FIGS. 3 and 4, when a first sensor (120) and a second sensor (130) are attached to two gloves (110), the first sensor (120) can be attached to a portion of the back of the hand located on the upper side of the overlapping hands of the person performing CPR, and the second sensor (130) can be attached to a portion of the palm of the hand located on the lower side of the overlapping hands of the person performing CPR.

[0046] According to one embodiment of the present invention, when the performer's left hand is positioned upward and the right hand is positioned downward and overlapped, a first sensor (120) may be attached to the back of the hand of the left glove (110), and a second sensor (130) may be attached to the palm of the right glove (110).

[0047] In addition, when a first sensor (120) and a second sensor (130) are attached to one glove (110), the first sensor (120) may be attached to a portion of the back of the hand of the glove (110) that comes into contact with the chest of a cardiac arrest patient, and the second sensor (130) may be attached to a portion of the palm of the glove (110) that comes into contact with the chest of a cardiac arrest patient.

[0048] According to one embodiment of the present invention, when the performer's right hand is positioned upward and the left hand is positioned downward and overlapped, a first sensor (120) may be attached to the back of the hand of the left glove (110), and a second sensor (130) may be attached to the palm of the left glove (110).

[0049] Next, the control device (140) receives the chest compression acceleration and pressure measured by the first sensor (120) and the second sensor (130) in real time, determines the current chest compression stage and state according to an algorithm, and displays the determined chest compression quality feedback (S230).

[0050] According to one embodiment of the present invention, the control device (140) may be configured as a microcontroller having a size of 85×56×17 mm and a weight of 45 g.

[0051] According to one embodiment of the present invention, the control device (140) may be a device (e.g., a desktop, a smartphone, a smartwatch, etc.) including a microcontroller.

[0052] FIG. 5 is a diagram illustrating an algorithm for determining the current chest compression stage and state by a control device according to another embodiment of the present invention.

[0053] As illustrated in FIG. 5, the control device (140) can determine the point in time when the measured first chest compression pressure is greater than 0 as the point in time when the first chest compression pressure is greater than 0 as the point in time when chest compression starts (S510).

[0054] Specifically, the control device (140) can receive the first chest compression pressure measured from the second sensor (130) (S511).

[0055] In addition, the control device (140) can determine the point in time when the first chest compression pressure is greater than 0 as the point in time when the chest compression starts if the received first chest compression pressure is greater than 0 (S512).

[0056] At this time, the control device (140) can transmit a control signal to the second sensor (130) to repeatedly measure the first chest compression pressure if the received first chest compression pressure is 0 or less.

[0057] Next, the control device (140) can calculate the speed of the first chest compression or the displacement of the first chest compression based on the measured first chest compression acceleration (S520).

[0058] Specifically, the control device (140) receives the first chest compression acceleration measured from the first sensor (120), and can calculate the speed of the first chest compression or the displacement of the first chest compression based on the received first chest compression acceleration. At this time, the displacement of the chest compression may be the depth into which the chest of the cardiac arrest patient is depressed due to the chest compression.

[0059] Next, the control device (140) can determine the point in time when the direction of chest compression changes and the displacement of the first chest compression begins to decrease as the start point of relaxation (S530).

[0060] Specifically, if the speed of the first chest compression produced is less than 0, the control device (140) can store the displacement of the first chest compression and determine the point in time when the speed of the first chest compression is less than 0 as the point in time when the compression period ends and the relaxation period starts (S531).

[0061] Next, the control device (140) can calculate the speed of the second chest compression or the displacement of the second chest compression based on the measured second chest compression acceleration (S540).

[0062] Specifically, the control device (140) receives the second chest compression acceleration measured from the first sensor (120), and can calculate the speed of the second chest compression or the displacement of the first chest compression based on the received second chest compression acceleration. At this time, the displacement of the chest compression may be the depth into which the chest of the cardiac arrest patient is depressed due to the chest compression.

[0063] Next, the control device (140) can determine the point in time when the speed of the second chest compression is less than 0 as the start point of the rest period when the direction of chest compression changes (S550).

[0064] Specifically, if the speed of the second chest compression produced is less than 0, the control device (140) can determine the point in time when the speed of the second chest compression is less than 0 as the point in time when the relaxation period ends and the rest period begins (S551).

[0065] In other words, the control device (140) can determine the point in time when the speed of the second chest compression and the displacement of the second chest compression become 0 as the end of the relaxation period and the start of the rest period.

[0066] Next, the control device (140) can determine whether the state is fully relaxed or incompletely relaxed based on the size of the measured second chest compression pressure (S560).

[0067] Specifically, the control device (140) can receive the second chest compression pressure measured from the second sensor (130) (S561).

[0068] In addition, the control device (140) can determine that incomplete relaxation occurs if the measured second chest compression pressure is greater than 0 (S562), and can determine that complete relaxation occurs if the measured second chest compression pressure is less than 0 (S563).

[0069] At this time, incomplete relaxation means that pressure is being applied to a cardiac arrest patient during the resting period, and the chest pressure measured after chest compression is greater than 0 or the displacement of chest compression measured after chest compression is greater than or equal to a preset reference value (e.g., 5 mm), and complete relaxation means that no pressure is being applied to a cardiac arrest patient during the resting period, and the chest pressure measured after chest compression is less than or equal to 0 or the displacement of chest compression measured after chest compression is less than or equal to a preset reference value (e.g., 5 mm).

[0070] Lastly, if the measured third chest compression pressure is greater than 0, the control device (140) can determine the point in time when the third chest compression pressure is greater than 0 as the end point of the rest period (S570).

[0071] Specifically, the control device (140) can receive the third chest compression pressure measured from the second sensor (130) (S571).

[0072] In addition, the control device (140) can determine the point in time when the third chest compression pressure is greater than 0 as the end point of the rest period if the received third chest compression pressure is greater than 0 (S572).

[0073] At this time, the control device (140) can transmit a control signal to the second sensor (130) to repeatedly measure the third chest compression pressure if the received third chest compression pressure is 0 or less.

[0074] In other words, one cycle of chest compression consists of a compression phase, a relaxation phase, and a rest phase in sequence.

[0075] Additionally, the control device (140) can provide an alarm by determining complete relaxation or incomplete relaxation using the ratio of the time of the rest period to the time of the compression and relaxation periods.

[0076] To elaborate, the control device (140) may determine incomplete relaxation when the ratio of the time of the rest period to the time of the compression and relaxation periods is less than the first period or greater than the second period, and may determine complete relaxation when the ratio of the time of the rest period to the time of the compression and relaxation periods is greater than the first period and less than the second period.

[0077] In addition, the control device (140) calculates how many times chest compressions are currently performed per minute, calculates the relaxation speed of chest compressions by calculating the time of diastole and the depth of chest compressions, and can evaluate the adequacy of relaxation using the pressure of chest compressions measured during the pause of CPR. At this time, the depth of chest compression is the displacement of chest compressions during diastole, and the adequacy of relaxation can be either complete relaxation or incomplete relaxation.

[0078] To elaborate, the control device (140) can calculate the time of relaxation and the displacement of chest compression in relaxation, and divide the calculated displacement of chest compression by the time of relaxation to calculate the relaxation speed of chest compression.

[0079] In addition, the control device (140) can determine the start and end times of chest compression using the chest compression pressure measured during the process of performing CPR, calculate the speed of chest compression or the displacement of chest compression based on the chest compression acceleration, determine the compression phase, relaxation phase, and rest phase of CPR, and provide feedback on the compression phase, relaxation phase, and rest phase. At this time, the control device (140) can provide the feedback in the form of a video, voice (e.g., "Do not apply pressure to the patient's chest in an incompletely relaxed state"), or an alarm sound (e.g., if the speed of chest compression is slow, an alarm sound 'beep-' sounds, and if the speed of chest compression is fast, an alarm sound 'beep beep-' sounds repeatedly).

[0080] In addition, the control device (140) may determine the point in time when the measured chest compression pressure increases as the start point of chest compression, determine the point in time when the direction of the calculated chest compression changes and the displacement of the chest compression begins to decrease as the start point of relaxation, determine the point in time when the speed of the calculated chest compression and the displacement of the chest compression become 0 as the end point of relaxation, and determine the period from the end point of relaxation to the start point of the next chest compression as the rest period.

[0081] In addition, the control device (140) can provide at least one of the CPR time, chest compression depth, chest compression speed, chest compression relaxation speed, and complete relaxation by voice (e.g., CPR time D minutes on day B of month A at hour C, chest compression depth E cm, chest compression speed F times per minute, chest compression relaxation speed G seconds (or G minutes), complete relaxation, etc.) or video.

[0082] According to the above-described embodiment of the present invention, it is possible to provide feedback on the quality of chest compression in real time to assist in providing high-quality cardiopulmonary resuscitation in the field.

[0083] Additionally, by attaching multiple sensors detachably to the glove, chest compression quality feedback can be provided at low cost and regardless of location.

[0084] Additionally, it can help emergency medical workers who primarily perform CPR to continue providing high-quality CPR by not putting additional strain on the body by not requiring them to wear additional equipment.

[0085] While the present invention has been described with reference to the embodiments illustrated in the drawings, these are merely exemplary, and those skilled in the art will understand that various modifications and equivalent embodiments are possible. Therefore, the true technical protection scope of the present invention should be determined by the technical spirit of the following claims.

[0086] [Explanation of symbols]

[0087] 100: Quality Feedback System

[0088] 110: Gloves

[0089] 120: First sensor

[0090] 130: Second sensor

[0091] 140: Control unit

Claims

1. In the real-time CPR chest compression quality feedback system, 1 or 2 gloves; A first sensor detachably attached to one side of the glove and configured to measure the acceleration of the performer's chest compression in real time; A second sensor detachably attached to the other side of the glove to measure the chest compression pressure of the performer in real time; and A quality feedback system including a control device that receives chest compression acceleration and chest compression pressure measured by the first and second sensors in real time, determines the current chest compression stage and state according to an algorithm, and displays the determined chest compression quality feedback.

2. In paragraph 1, The above control device, The start and end points of chest compression are determined using the chest compression pressure measured during CPR. A quality feedback system that calculates the speed of chest compression or displacement of chest compression based on the chest compression acceleration, determines the compression phase, relaxation phase, and rest phase of cardiopulmonary resuscitation, and provides feedback on the compression phase, relaxation phase, and rest phase.

3. In paragraph 2, The above control device, The point at which the measured chest compression pressure increases is determined as the start point of the chest compression, The point in time when the direction of the chest compression changes and the displacement of the chest compression begins to decrease is judged as the start of the relaxation phase. The point in time when the speed of the chest compression and the displacement of the chest compression calculated above become 0 is judged as the end point of the relaxation period, A quality feedback system that determines the rest period from the end of the relaxation period to the start of the next chest compression period.

4. In paragraph 1, The above control device, A quality feedback system that calculates the number of chest compressions performed per minute, calculates the relaxation rate of chest compressions by calculating the time of relaxation and the depth of chest compressions, and evaluates the adequacy of relaxation using the pressure of the chest compressions measured during the pause period of cardiopulmonary resuscitation.

5. In paragraph 1, The above control device, A quality feedback system that provides at least one of the following: duration of CPR, depth of chest compression, rate of chest compression, rate of chest compression relaxation, and complete relaxation, through audio or video.

6. In paragraph 1, The above first sensor is an acceleration sensor that is attached to the back of the hand of the glove, The second sensor is a quality feedback system that is attached to the palm area of ​​the glove as a pressure sensor.

7. In a real-time cardiopulmonary resuscitation chest compression quality feedback method performed by a quality feedback system, A step of measuring the performer's chest compression acceleration in real time; A step of measuring the chest compression pressure of the above performer in real time; and A quality feedback method comprising a step of receiving the measured chest compression acceleration and chest compression pressure in real time, determining the current chest compression stage and state according to an algorithm, and displaying the determined chest compression quality feedback.

8. In paragraph 7, The above displaying step is, The start and end points of chest compression are determined using the chest compression pressure measured during CPR. A quality feedback method for determining the compression phase, relaxation phase, and rest phase of cardiopulmonary resuscitation by calculating the speed of chest compression or displacement of chest compression based on the chest compression acceleration, and providing feedback on the compression phase, relaxation phase, and rest phase.

9. In paragraph 7, The above displaying step is, A step of determining the point in time when the measured first chest compression pressure is greater than 0 as the point in time when the first chest compression pressure is greater than 0 as the point in time when chest compression begins; A step of calculating the velocity of the first chest compression or the displacement of the first chest compression based on the measured acceleration of the first chest compression; A step in which the point in time when the direction of chest compression changes and the displacement of the first chest compression begins to decrease is judged as the start of relaxation; A step of calculating the velocity of the second chest compression or the displacement of the second chest compression based on the measured acceleration of the second chest compression; When the direction of chest compression changes, a step of determining the point in time when the speed of the second chest compression is less than 0 as the point in time when the pause period begins; A step of determining whether the patient is in a complete relaxation state or an incomplete relaxation state based on the size of the measured second chest compression pressure; and A quality feedback method including a step of determining the point in time when the measured third chest compression pressure is greater than 0 as the end point of the rest period.

10. In paragraph 7, The above displaying step is, A quality feedback method that calculates the number of chest compressions performed per minute, calculates the relaxation rate of chest compressions by calculating the time of relaxation and the depth of chest compressions, and evaluates the adequacy of relaxation using the pressure of the chest compressions measured during the pause period of cardiopulmonary resuscitation.

11. In paragraph 7, The above displaying step is, A quality feedback method that provides at least one of the following: duration of CPR, depth of chest compression, rate of chest compression, rate of chest compression relaxation, and whether chest compression is completely relaxed, through audio or video.

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