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EP-4741000-A1 - GUIDANCE DEVICE FOR DETECTING CARDIOPULMONARY RESUSCITATION PERFORMANCE

EP4741000A1EP 4741000 A1EP4741000 A1EP 4741000A1EP-4741000-A1

Abstract

A guidance device through detection of cardiopulmonary resuscitation (CPR) performance includes a pair of electrode pads configured to be attached to a patient's body; a signal providing unit configured to provide a signal to the pair of electrode pads; a differential amplifier connected to the pair of electrode pads and configured to generate an amplified signal proportional to a difference between input signals at both ends provided from the signal providing unit; and a control unit configured to store a normal speed range for a plurality of amplified signals generated from the differential amplifier, and determine whether CPR is being performed and whether CPR is performed normally based on a speed of the plurality of amplified signals generated from the differential amplifier.

Inventors

  • NOH, TAE JONG

Assignees

  • CU Medical Systems Inc.

Dates

Publication Date
20260513
Application Date
20251107

Claims (15)

  1. A guidance device through detection of cardiopulmonary resuscitation (CPR) performance, comprising: a pair of electrode pads configured to be attached to a patient's body; a signal providing unit configured to provide a signal to the pair of electrode pads; a differential amplifier connected to the pair of electrode pads and configured to generate an amplified signal proportional to a difference between input signals at both ends provided from the signal providing unit; and a control unit configured to store a normal speed range for a plurality of amplified signals generated from the differential amplifier, and determine whether CPR is being performed and whether CPR is performed normally based on the plurality of amplified signals generated from the differential amplifier and a speed of the plurality of amplified signals generated from the differential amplifier.
  2. The guidance device through detection of CPR performance according to claim 1, further comprising: a speaker configured to output guidance voice for CPR, wherein the control unit is configured to store the guidance voice regarding a CPR performing method and control the speaker so that the guidance voice regarding the CPR performing method is output when the amplified signal generated from the differential amplifier is received.
  3. The guidance device through detection of CPR performance according to claim 2, wherein the control unit is configured to store guidance voice regarding whether CPR is being performed and whether CPR is performed normally, and control the speaker so that the guidance voice is output when it is determined, based on the plurality of amplified signals generated from the differential amplifier, that CPR is not being performed.
  4. The guidance device through detection of CPR performance according to claim 3, wherein the control unit is configured to store a simplified guidance voice and a detailed guidance voice regarding whether CPR is performed normally, and control the speaker so that the simplified guidance voice is output when the speed of the plurality of amplified signals generated from the differential amplifier is within the normal speed range, and the detailed guidance voice is output when the speed of the plurality of amplified signals generated from the differential amplifier deviates from the normal speed range.
  5. The guidance device through detection of CPR performance according to claim 4, wherein the control unit is configured to store a threshold number of times for CPR, calculate the number of performances of CPR based on the plurality of amplified signals generated from the differential amplifier, determine whether the calculated number of performances exceeds the threshold number of times, and control the speaker so that any one of the simplified guidance voice and the detailed guidance voice is output according to the determination result.
  6. The guidance device through detection of CPR performance according to claim 1, wherein the control unit is configured to monitor, in real time, a state and performing accuracy of a rescuer during CPR performance, and output the detailed guidance voice step by step according to basic stages, intermediate processes, and special situations of CPR.
  7. The guidance device through detection of CPR performance according to claim 1, wherein the control unit is configured to provide the detailed guidance voice to configured provide basic instructions on a chest compression position, compression depth, and compression rate in a basic stage of CPR, evaluate in real time the compression depth and rate in an intermediate process and provide feedback when they deviate from a normal range, and provide immediate instructions regarding fatigue of the rescuer, inaccuracy of hand position, or inconsistency of compression rhythm in a special situation.
  8. The guidance device through detection of CPR performance according to claim 7, wherein the control unit is configured to attach a pressure sensor to a chest compression area of CPR to measure, in real time, pressure generated during CPR, calculate the compression depth and rate based on data collected through the pressure sensor, and convert the calculated result into voice and visual feedback.
  9. The guidance device through detection of CPR performance according to claim 8, wherein the pressure sensor is configured to be one selected from a piezoresistive pressure sensor, a piezoelectric sensor, or a capacitive pressure sensor, and the control unit is configured to determine whether CPR is being performed and whether CPR is performed normally based on the pressure data detected from the pressure sensor.
  10. The guidance device through detection of CPR performance according to claim 9, wherein the control unit is configured to provide immediate guidance to the rescuer with voice and visual guidance through the speaker and a display unit when the compression depth is insufficient or excessive, or when the compression rate deviates from a normal range, based on the data collected from the pressure sensor.
  11. A guidance method through detection of cardiopulmonary resuscitation (CPR) performance, comprising: storing a normal speed range for a plurality of amplified signals generated from a differential amplifier that is connected to a pair of electrode pads attached to a patient's body and configured to generate the amplified signals proportional to a difference between input signals at both ends provided from a signal providing unit; and determining, based on a speed of the plurality of amplified signals generated from the differential amplifier, whether CPR is being performed and whether CPR is performed normally.
  12. The guidance method through detection of cardiopulmonary resuscitation performance according to claim 11, further comprising: storing guidance voice regarding a CPR performing method; and outputting the guidance voice regarding the CPR performing method when the amplified signal generated from the differential amplifier is received.
  13. The guidance method through detection of CPR performance according to claim 12, further comprising: storing the guidance voice regarding whether CPR is being performed and whether CPR is performed normally; and outputting the guidance voice when it is determined, based on the speed of the plurality of amplified signals generated from the differential amplifier, that CPR is not being performed.
  14. The guidance method through detection of CPR performance according to claim 13, further comprising: storing a simplified guidance voice and a detailed guidance voice regarding whether CPR is performed normally; outputting the simplified guidance voice when the speed of the plurality of amplified signals generated from the differential amplifier is within the normal speed range; and outputting the detailed guidance voice when the speed of the plurality of amplified signals generated from the differential amplifier deviates from the normal speed range.
  15. The guidance method through detection of CPR performance according to claim 14, further comprising: storing a threshold number of times for CPR; calculating the number of performances of CPR based on the plurality of amplified signals generated from the differential amplifier; determining whether the calculated number of performances exceeds the threshold number of times; and outputting any one of the simplified guidance voice and the detailed guidance voice according to the determination result.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS This application claims the priority of Korean Patent Application No. 10-2024-0158108 filed on November 8, 2024, in the Korean Intellectual Property Office, the disclosure of which is incorporated herein by reference. BACKGROUND Field The present disclosure relates to a guidance device through detection of cardiopulmonary resuscitation (CPR) performance, and more particularly, to a guidance device through detection of CPR performance that provides guidance voice for CPR. Description of the Related Art Rapid cardiopulmonary resuscitation (CPR) and defibrillation performed on a patient with cardiac arrest may increase the patient's survival rate. Automated defibrillators that can be easily used by not only medical personnel but also non-medical personnel are installed in public places such as multi-use facilities, schools, and public institutions. Korean Registered Patent No. 10-1049273 entitled "Automatic Defibrillator and Its Operating Method" includes a voice guidance unit for guiding treatment steps for a patient by voice to a rescuer, a step execution evaluation unit for evaluating an execution degree for each step of the guidance voice of the voice guidance unit, and a guidance voice change unit for changing the guidance voice step of the voice guidance unit according to an evaluation result of the step execution evaluation unit. This patent evaluates the rescuer's level of using the defibrillator and provides customized voice guidance according to the user's level. International Patent Application Publication No. WO 2005/099818 A2 entitled "Automated Pediatric Defibrillator" includes a user interface having a graphical display unit and a text display unit provided on a cover, and a display unit or a voice speaker that provides prompts to the rescuer to assist in performing treatment for the patient. It is guided to output a voice or text prompt to the rescuer such that the rescuer may recognize the patient's condition and perform defibrillation. However, the conventional rescue guidance devices provide guidance for performing defibrillation, but do not provide any guidance on performing CPR by professional or non-professional rescuers after the defibrillation is performed. In particular, since non-professional rescuers have no experience or training in CPR, they may perform chest compressions at a speed that is too slow or too fast in urgent situations. In addition, although professional rescuers are skilled in emergency treatments such as CPR, they are hindered from providing quicker rescue due to excessive and uniform guidance provided to all users. SUMMARY An object to be achieved by the present disclosure is to provide a guidance device through detection of cardiopulmonary resuscitation (CPR) performance, which may determine whether CPR is being performed and whether the CPR is performed normally, and provide guidance accordingly. Another object of the present disclosure is to provide a guidance device through detection of cardiopulmonary resuscitation (CPR) performance, which may improve both efficiency and accuracy of CPR performance by providing CPR guidance suitable for both skilled and unskilled users. In conventional defibrillation devices, CPR guidance is provided according to voice guidance set at the time of product release. However, when the voice guidance is set in a detailed manner, it may interfere with fast and prompt CPR performance by skilled users, and when the voice guidance is set in a simplified manner, it may delay CPR performance by unskilled users. In order to solve these problems, the present disclosure monitors changes in thoracic impedance between both ends of defibrillation pads for a predetermined period of time from the point when CPR voice guidance begins, and is designed such that when CPR is normally performed, the CPR voice guidance proceeds in a simplified manner. A guidance device through detection of cardiopulmonary resuscitation (CPR) performance according to the present disclosure for achieving the above object includes: a pair of electrode pads configured to be attached to a patient's body; a signal providing unit configured to provide a signal to the pair of electrode pads; a differential amplifier connected to the pair of electrode pads and configured to generate an amplified signal proportional to a difference between input signals at both ends provided from the signal providing unit; and a control unit configured to store a normal speed range for a plurality of amplified signals generated from the differential amplifier, and determine whether CPR is being performed and whether CPR is performed normally based on the plurality of amplified signals generated from the differential amplifier and a speed of the plurality of amplified signals generated from the differential amplifier. When a pair of electrode pads is attached to a chest area of a patient, whether CPR is being performed may be determined based on an amplitud