Emergency cardiac resuscitation pressure control method and system

Abstract

The invention provides an emergency cardiac resuscitation pressure control method and system, and relates to the technical field of medical equipment. The method comprises the steps that the pressing plate makes contact with the chest of a patient; the pressing plate is controlled to reciprocate according to the preset frequency and the preset pressing depth; acquiring end-expiratory carbon dioxide, arterial blood pressure value and oxyhemoglobin saturation of the patient; determining whether a loop recovery sign exists; determining a pressing plate control adjustment coefficient; determining the number of monitoring moments included in the next monitoring period; determining the number of monitoring moments included in the next monitoring period, and setting support strength adjustment data; and acquiring end-expiratory carbon dioxide, an arterial blood pressure value and blood oxygen saturation in the test period, and determining whether cardiac resuscitation is stopped or not. According to the method and the device, whether a circulation recovery sign exists or not can be judged based on the physiological indexes of the patient, and the cardio-pulmonary resuscitation strategy is dynamically adjusted. The accuracy and real-time performance of determining the pressing force are improved, and the efficiency of cardio-pulmonary resuscitation is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of medical equipment, and in particular to an emergency cardiac resuscitation pressure control method and system. BACKGROUND

[0002] Cardiac arrest is a life-threatening emergency, and cardiopulmonary resuscitation is a key measure for rescue. Automatic cardiac resuscitation equipment can automatically perform chest compression to maintain blood circulation and oxygen supply. In the related art, the automatic cardiac resuscitation equipment usually adopts a fixed compression mode, and lacks real-time monitoring and feedback adjustment of the physiological state of the patient. Therefore, there are problems such as inaccurate compression force and low cardiopulmonary resuscitation efficiency, and it is difficult to dynamically adjust the compression force in real time according to the physiological indicators of the patient, resulting in a low success rate of rescue.

[0003] The information disclosed in the background section of this application is only intended to deepen the understanding of the general background of the application and should not be regarded as recognition or in any form as admitting that this information constitutes prior art known to those skilled in the art. SUMMARY

[0004] The present application provides an emergency cardiac resuscitation pressure control method and system, which can solve the technical problem that the related art is difficult to dynamically adjust the compression force in real time according to the physiological indicators of the patient.

[0005] According to a first aspect of the present application, an emergency cardiac resuscitation pressure control method is provided, comprising:

[0006] Before performing cardiac resuscitation using the cardiac resuscitation equipment, the compression plate is contacted with the chest of the patient;

[0007] After starting cardiopulmonary resuscitation, the compression plate is controlled to perform reciprocating motion according to a preset frequency and a preset compression depth;

[0008] At a plurality of monitoring moments, the end-tidal carbon dioxide, arterial blood pressure value and blood oxygen saturation of the patient are obtained;

[0009] At the end of the monitoring period, whether there is a sign of circulation recovery is determined according to the end-tidal carbon dioxide data and the arterial blood pressure value at the plurality of monitoring moments in the monitoring period;

[0010] If there is no sign of circulation recovery, a compression plate control adjustment coefficient is determined according to the end-tidal carbon dioxide data, the arterial blood pressure value and the blood oxygen saturation at the plurality of monitoring moments in the monitoring period;

[0011] According to the number of the plurality of monitoring moments in the monitoring period, and the end-tidal carbon dioxide data, the arterial blood pressure value and the blood oxygen saturation, the number of monitoring moments included in the next monitoring period is determined;

[0012] If there is a sign of circulation recovery, the number of monitoring time points included in the next monitoring period is determined according to the end-tidal carbon dioxide data, arterial blood pressure values and blood oxygen saturation at multiple monitoring time points in the monitoring period, and the support intensity adjustment data is set;

[0013] At the end of the next monitoring period, a test period is set, the end-tidal carbon dioxide, arterial blood pressure values and blood oxygen saturation in the test period are obtained, and it is determined whether to stop the operation of the cardiac resuscitation device.

[0014] According to the present application, it is determined whether there is a sign of circulation recovery, comprising:

[0015] The first condition is set as the first change rate of the end-tidal carbon dioxide data between consecutive monitoring time points is higher than the first change rate threshold, or the end-tidal carbon dioxide data of consecutive monitoring time points are all higher than the first data threshold;

[0016] The second condition is set according to the arterial blood pressure values;

[0017] In the case where the first condition and the second condition are met at the same time, it is determined that there is a sign of circulation recovery.

[0018] According to the present application, the second condition is set according to the arterial blood pressure values, comprising:

[0019] The peak values of the arterial blood pressure values at multiple monitoring time points are obtained;

[0020] According to the time interval of the reciprocating motion of the pressing plate and the number of reciprocating motions of the pressing plate in the monitoring period, a plurality of detection time windows are set, wherein the interval of the starting time points of adjacent detection time windows is equal to the time interval of the reciprocating motion of the pressing plate, and the length of each detection time window is equal, and the number of detection time windows is equal to the number of reciprocating motions of the pressing plate in the monitoring period;

[0021] The midpoint of the first detection time window is aligned with the time point corresponding to the i-th arterial blood pressure peak value, and it is determined whether there is an arterial blood pressure peak value in other detection time windows, if not, the midpoint of the first detection time window is aligned with the time point corresponding to the i+1-th arterial blood pressure peak value, and it is determined whether there is an arterial blood pressure peak value in other detection time windows, wherein i is a positive integer;

[0022] When there is an arterial blood pressure peak value in all detection time windows, a peak window is set according to the arterial blood pressure peak value in the first detection time window, and it is judged whether the arterial blood pressure peak value is contained in the intersection of each detection time window and the peak window;

[0023] If the arterial blood pressure value peak is contained in the intersection of each detection time window and the peak window, it is determined whether there is an arterial blood pressure value peak not in the detection time window;

[0024] If there is no arterial blood pressure value peak not in the detection time window, it is directly determined that the second condition is not met;

[0025] If there is an arterial blood pressure value peak not in the detection time window, the arterial blood pressure value peak not in the detection time window is determined as the first peak value;

[0026] If there is an arterial blood pressure value peak not belonging to the intersection of each detection time window and the peak window, but belonging to the detection time window and being higher than the upper limit of the peak window, the arterial blood pressure value peak is determined as the first peak value, and the arterial blood pressure value peak not in the detection time window is determined as the first peak value;

[0027] If there is an arterial blood pressure value peak not belonging to the intersection of each detection time window and the peak window, but belonging to the detection time window and being lower than the lower limit of the peak window, the midpoint of the first detection time window is moved to the time corresponding to the next arterial blood pressure value peak until the arterial blood pressure value peaks belonging to the detection time window all belong to the peak window or are higher than the upper limit of the peak window;

[0028] The arterial blood pressure value peak belonging to the intersection of the detection time window and the peak window is determined as the second peak value;

[0029] The arterial blood pressure value peaks at multiple monitoring times are subjected to fast Fourier transform to obtain arterial blood pressure spectrum information;

[0030] The second condition is determined according to the first peak value, the second peak value and the arterial blood pressure spectrum information.

[0031] According to the present application, the second condition is determined, comprising:

[0032] According to the frequency of the reciprocating motion of the pressing plate, the external force frequency is determined;

[0033] The second peak frequency corresponding to the spectrum peak value closest to the external force frequency is determined;

[0034] The highest spectrum peak value except the spectrum peak value corresponding to the second peak frequency is determined;

[0035] According to the formula ,

[0036] The resuscitation judgment parameter R is obtained, wherein, is the average rising rate from the adjacent valley value before the jth first peak value to the jth first peak value, an average rising rate from an adjacent valley value before the kth second peak value to the kth second peak value, a number of first peak values, a number of second peak values, a second peak frequency corresponding to a spectrum peak value, a highest spectrum peak value other than the spectrum peak value corresponding to the second peak frequency;

[0037] determining that the resuscitation judgment parameter is higher than or equal to the preset parameter threshold value as a second condition.

[0038] According to the present application, the pressing plate control adjustment coefficient is determined, comprising:

[0039] According to the arterial blood pressure value, a plurality of diastolic pressure data in the monitoring period is determined, and an average value of the diastolic pressure data is determined;

[0040] determining a first relative gap between the average value of the diastolic pressure data and a set diastolic pressure threshold value;

[0041] determining a second relative gap between the average value of the end-tidal carbon dioxide data and a set end-tidal carbon dioxide data threshold value;

[0042] determining a third relative gap between the average value of the blood oxygen saturation and a set blood oxygen saturation threshold value;

[0043] determining the maximum value among the first relative gap, the second relative gap and the third relative gap as the pressing plate control adjustment coefficient.

[0044] According to the present application, the number of monitoring time points included in the next monitoring period is determined, comprising:

[0045] determining the upward rounding value of the product of the number of monitoring time points in the monitoring period and 1+A as the number of monitoring time points included in the next monitoring period, wherein A is the pressing plate control adjustment coefficient.

[0046] According to the present application, the number of monitoring time points included in the next monitoring period is determined, and the support intensity adjustment data is set, comprising:

[0047] obtaining a first maximum value of the end-tidal carbon dioxide data, a second maximum value of the first peak value and a third maximum value of the blood oxygen saturation;

[0048] determining a fourth relative gap between the first maximum value and a set end-tidal carbon dioxide data threshold value;

[0049] determining a fifth relative gap between the second maximum value and a set systolic pressure threshold value;

[0050] determining a sixth relative gap between the blood oxygen saturation and a set blood oxygen saturation threshold value;

[0051] the difference between 1 and the minimum value of the fourth relative gap, the fifth relative gap and the sixth relative gap, and the upward rounding value of the product of the number of the plurality of monitoring time points in the monitoring period;

[0052] According to the formula ,

[0053] determining the support intensity adjustment data of the tth monitoring time point in the next monitoring period , wherein is the number of monitoring time points included in the next monitoring period, L is a preset compression depth, t≤ , and t and are positive integers.

[0054] According to a second aspect of the present application, an emergency cardiac resuscitation pressure control system is provided, comprising,

[0055] a contact module, before cardiac resuscitation is performed using a cardiac resuscitation device, contacting a compression plate to a patient's chest;

[0056] a reciprocating motion module, after starting cardiopulmonary resuscitation, controlling the compression plate to reciprocate at a preset frequency and a preset compression depth;

[0057] an acquisition module, at a plurality of monitoring time points, acquiring end-tidal carbon dioxide, arterial blood pressure and blood oxygen saturation of the patient;

[0058] a first judgment module, at the end of a monitoring period, determining whether there is a sign of circulatory recovery according to the end-tidal carbon dioxide data and the arterial blood pressure at the plurality of monitoring time points in the monitoring period;

[0059] a control adjustment coefficient module, if there is no sign of circulatory recovery, determining a compression plate control adjustment coefficient according to the end-tidal carbon dioxide data, the arterial blood pressure and the blood oxygen saturation at the plurality of monitoring time points in the monitoring period;

[0060] a monitoring time point number module, determining the number of monitoring time points included in the next monitoring period according to the number of the plurality of monitoring time points in the monitoring period, and the end-tidal carbon dioxide data, the arterial blood pressure and the blood oxygen saturation;

[0061] a support intensity adjustment data module, if there is a sign of circulatory recovery, determining the number of monitoring time points included in the next monitoring period according to the end-tidal carbon dioxide data, the arterial blood pressure and the blood oxygen saturation at the plurality of monitoring time points in the monitoring period, and setting support intensity adjustment data;

[0062] The second judging module sets a test period at the end of the next monitoring period, acquires the end-tidal carbon dioxide, arterial blood pressure value and blood oxygen saturation in the test period, and determines whether to stop the operation of the cardiac resuscitation device.

[0063] By adopting the technical scheme, the present application can achieve the following technical effects:

[0064] According to the application, the emergency cardiac resuscitation pressure control method and system of the embodiment of the application can contact the pressing plate to the chest of the patient, control the reciprocating motion of the pressing plate according to the preset frequency and the preset pressing depth, and acquire the end-tidal carbon dioxide, the arterial blood pressure value and the blood oxygen saturation of the patient, and then determine whether there is a circulation recovery sign, if there is no circulation recovery sign, determine the pressing plate control adjustment coefficient, and determine the number of monitoring time points included in the next monitoring period, and if there is a circulation recovery sign, determine the number of monitoring time points included in the next monitoring period, and set the support force adjustment data, and then determine whether to stop the operation of the cardiac resuscitation device. The pressing force can be dynamically adjusted in real time based on the physiological indicators of the patient, the accuracy and real-time performance of the pressing force determination are improved, and the efficiency of the cardiopulmonary resuscitation is improved. The pressing plate can be contacted to the chest of the patient, the reciprocating motion of the pressing plate can be controlled according to the preset frequency and the preset pressing depth, and the end-tidal carbon dioxide, the arterial blood pressure value and the blood oxygen saturation of the patient can be acquired at multiple monitoring time points, to provide basic data for determining whether there is a circulation recovery sign. When determining whether there is a circulation recovery sign, the end-tidal carbon dioxide data and the arterial blood pressure value can be used to set the first condition and the second condition, and then in the case where the first condition and the second condition are met at the same time, it is determined that there is a circulation recovery sign. The frequency of the peak value of the arterial blood pressure value passively generated by the pressing is relatively stable with the pressing frequency, the frequency of the peak value of the arterial blood pressure value actively generated by the autonomous beating of the heart is relatively fast at the beginning, and then gradually stable, and the change rate of the peak value of the arterial blood pressure value passively generated by the pressing is obviously lower than the change rate of the peak value of the arterial blood pressure value actively generated by the autonomous beating of the heart, the detection time window and the peak value window are set, and the peak value of the arterial blood pressure value can be distinguished based on the peak value in the detection time window and the peak value window. The accuracy, objectivity and comprehensiveness of the judgment of whether the patient has a circulation recovery sign are improved. When determining the pressing plate control adjustment coefficient, the end-tidal carbon dioxide data, the arterial blood pressure value and the blood oxygen saturation at multiple monitoring time points in the monitoring period can be used to determine the pressing plate control adjustment coefficient. It is considered that when the patient recovers the circulation, the diastolic pressure data, the end-tidal carbon dioxide data and the blood oxygen saturation data should reach the level when the circulation recovery sign is generated, and the length of the next monitoring period is appropriately adjusted to strengthen the treatment and monitoring of the patient. The accuracy, objectivity and comprehensiveness of the determination of the pressing plate control adjustment coefficient are improved. Further, the end-tidal carbon dioxide data, the arterial blood pressure value and the blood oxygen saturation at multiple monitoring time points in the monitoring period can be used to determine the number of monitoring time points included in the next monitoring period and the support force adjustment data, and a test period is set to determine whether to stop the operation of the cardiac resuscitation device.In consideration of the situation that the rescue may fail if the patient is directly stopped from the cardiac resuscitation instrument after the circulation recovery sign is generated, the number of monitoring moments included in the next monitoring period is reduced and the compression depth is gradually reduced to provide a monitoring period buffer time for stopping the cardiac resuscitation instrument, so that the accuracy and real-time performance of the compression depth determination are improved and the efficiency of the cardiopulmonary resuscitation is improved.

[0065] It should be understood that the above general description and the following detailed description are only exemplary and explanatory, but not limiting the present application. Other features and aspects of the present application will be more apparent from the following detailed description of exemplary embodiments with reference to the accompanying drawings. BRIEF DESCRIPTION OF DRAWINGS

[0066] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments or the prior art description will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments of the present application, and other embodiments can be obtained by those skilled in the art without creative labor on the basis of these drawings.

[0067] Figure 1 An exemplary flowchart of an emergency cardiac resuscitation pressure control method according to an embodiment of the present application is shown;

[0068] Figure 2 An exemplary flowchart of determining whether there is a circulation recovery sign according to an embodiment of the present application is shown;

[0069] Figure 3 An exemplary block diagram of an emergency cardiac resuscitation pressure control system according to an embodiment of the present application is shown. DETAILED DESCRIPTION

[0070] In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0071] The technical solutions of the present application will be described in detail below with specific embodiments. The following specific embodiments can be combined with each other, and the same or similar concepts or processes may not be described in some embodiments.

[0072] Figure 1 An exemplary flowchart of an emergency cardiac resuscitation pressure control method according to an embodiment of the present application is shown, the method comprising:

[0073] Step S1, before using the cardiac resuscitation device to perform cardiac resuscitation, the pressing plate is contacted with the chest of the patient;

[0074] Step S2, after starting the cardiopulmonary resuscitation, the pressing plate is controlled to reciprocate at a preset frequency and a preset pressing depth;

[0075] Step S3, at multiple monitoring moments, end-tidal carbon dioxide, arterial blood pressure and blood oxygen saturation of the patient are acquired;

[0076] Step S4, at the end of the monitoring period, whether there is a circulation recovery sign is determined according to the end-tidal carbon dioxide data and the arterial blood pressure at the multiple monitoring moments in the monitoring period;

[0077] Step S5, if there is no circulation recovery sign, a pressing plate control adjustment coefficient is determined according to the end-tidal carbon dioxide data, the arterial blood pressure and the blood oxygen saturation at the multiple monitoring moments in the monitoring period;

[0078] Step S6, the number of monitoring moments included in the next monitoring period is determined according to the number of the multiple monitoring moments in the monitoring period and the end-tidal carbon dioxide data, the arterial blood pressure and the blood oxygen saturation;

[0079] Step S7, if there is a circulation recovery sign, the number of monitoring moments included in the next monitoring period is determined according to the end-tidal carbon dioxide data, the arterial blood pressure and the blood oxygen saturation at the multiple monitoring moments in the monitoring period, and support force adjustment data is set;

[0080] Step S8, at the end of the next monitoring period, a test period is set, end-tidal carbon dioxide, arterial blood pressure and blood oxygen saturation in the test period are acquired, and whether to stop the operation of the cardiac resuscitation device is determined.

[0081] The emergency cardiac resuscitation pressure control method and system according to the embodiments of the present application can contact the pressing plate with the chest of the patient, control the pressing plate to reciprocate at a preset frequency and a preset pressing depth, acquire end-tidal carbon dioxide, arterial blood pressure and blood oxygen saturation of the patient, and then determine whether there is a circulation recovery sign, if there is no circulation recovery sign, determine a pressing plate control adjustment coefficient, and determine the number of monitoring moments included in the next monitoring period, if there is a circulation recovery sign, determine the number of monitoring moments included in the next monitoring period, and set support force adjustment data, and then determine whether to stop the operation of the cardiac resuscitation device. The pressing force can be dynamically adjusted in real time based on the physiological indicators of the patient, the accuracy and real-time performance of the determination of the pressing force are improved, and the efficiency of the cardiopulmonary resuscitation is improved.

[0082] According to the embodiment of the present application, in step S1, before the cardiac resuscitation is performed using the cardiac resuscitation device, the pressing plate is contacted with the chest of the patient. The pressing plate is reciprocated according to the preset pressing frequency and the preset pressing depth to perform the cardiopulmonary resuscitation.

[0083] According to the embodiment of the present application, in step S2, after the cardiopulmonary resuscitation is started, the pressing plate is controlled to be reciprocated according to the preset frequency and the preset pressing depth. The target number of times per unit time at which the pressing plate of the cardiac resuscitation device is set to press the patient according to the physical condition of the patient is the preset frequency, and the target depth of pressing is the preset pressing depth. The preset frequency can be 100-120 times per minute, and the preset pressing depth can be 5-6 cm. In this way, the cardiac blood supply is increased, and the risk of complications such as fracture of the sternum and contusion of the heart is reduced.

[0084] According to the embodiment of the present application, in step S3, at a plurality of monitoring time points, the end-tidal carbon dioxide, the arterial blood pressure value, and the blood oxygen saturation of the patient are obtained. The time interval between the adjacent monitoring time points is short, for example, 0.5 seconds, 0.2 seconds, etc., so as to monitor the physiological indexes of the patient after each pressing in real time. At the plurality of monitoring time points, the end-tidal carbon dioxide content of the patient is obtained by a carbon dioxide sensor (for example, a mainstream carbon dioxide monitor, a side-stream carbon dioxide monitor, etc.), which is the end-tidal carbon dioxide. The arterial blood pressure waveform and the blood oxygen saturation value of the patient are obtained by using the invasive arterial blood pressure monitoring method and the pulse oximetry method, which are the arterial blood pressure value (including the diastolic pressure and the systolic pressure) and the blood oxygen saturation. The time interval between the adjacent monitoring time points is not limited in the present application.

[0085] In this way, the pressing plate is contacted with the chest of the patient, the pressing plate is controlled to be reciprocated according to the preset frequency and the preset pressing depth, and at a plurality of monitoring time points, the end-tidal carbon dioxide, the arterial blood pressure value, and the blood oxygen saturation of the patient are obtained, thereby providing basic data for determining whether there is a sign of circulatory recovery.

[0086] Figure 2 An exemplary flowchart for determining whether there is a sign of circulatory recovery according to the embodiment of the present application is shown.

[0087] According to the embodiment of the present application, in step S4, at the end of the monitoring period, whether there is a sign of circulation recovery is determined according to the end-tidal carbon dioxide data and the arterial blood pressure values at multiple monitoring time points in the monitoring period, comprising: step S41, setting a first condition that the first change rate of the end-tidal carbon dioxide data between consecutive preset number of monitoring time points is higher than a first change rate threshold, or the end-tidal carbon dioxide data at consecutive preset number of monitoring time points are all higher than a first data threshold; step S42, setting a second condition according to the arterial blood pressure values; step S43, determining that there is a sign of circulation recovery when the first condition and the second condition are both met.

[0088] According to the embodiment of the present application, in step S41, the first condition is set that the first change rate of the end-tidal carbon dioxide data between consecutive preset number of monitoring time points is higher than a first change rate threshold, or the end-tidal carbon dioxide data at consecutive preset number of monitoring time points are all higher than a first data threshold. The monitoring period can be 10 seconds, 15 seconds, etc. The preset number can be 3, 4, 5, etc. The first change rate of the end-tidal carbon dioxide data at the current monitoring time point is the ratio of the difference between the end-tidal carbon dioxide data at the current monitoring time point and the previous monitoring time point to the end-tidal carbon dioxide data at the previous monitoring time point. Based on the same processing manner, the first change rate of the end-tidal carbon dioxide data at each monitoring time point can be obtained. When the first change rate of the end-tidal carbon dioxide data between consecutive preset number of monitoring time points is higher than a first change rate threshold (for example, 0.1, 0.2, etc.), it can be considered that the end-tidal carbon dioxide data of the patient increases continuously in a certain period of time, and the increase is relatively fast, and the lung ventilation function and the cardiac blood volume are greatly improved. When the end-tidal carbon dioxide data at consecutive preset number of monitoring time points are all higher than a first data threshold (for example, 20 mmHg, 22 mmHg, etc.), it can be considered that the end-tidal carbon dioxide data of the patient is maintained at a relatively high level in a certain period of time, and the lung ventilation function and the cardiac blood volume can maintain the basic metabolic demand of the patient. The first condition is set that the first change rate of the end-tidal carbon dioxide data between consecutive preset number of monitoring time points is higher than a first change rate threshold, or the end-tidal carbon dioxide data at consecutive preset number of monitoring time points are all higher than a first data threshold. When any one of the first condition is met, it can be judged from the perspective of the end-tidal carbon dioxide data that the lung ventilation function and the cardiac blood volume of the patient are greatly improved, or the lung ventilation function and the cardiac blood volume can maintain the basic metabolic demand of the patient, that is, the patient has a sign of pulmonary circulation recovery, and it can be considered that the first condition is met.

[0089] According to the embodiment of the present application, in step S42, the second condition is set according to the arterial blood pressure value, comprising: obtaining a plurality of arterial blood pressure value peaks at monitoring moments; setting a plurality of detection time windows according to the time interval of the reciprocating movement of the pressing plate and the number of reciprocating movements of the pressing plate in the monitoring period, wherein the interval of the starting moments of adjacent detection time windows is equal to the time interval of the reciprocating movement of the pressing plate, the length of each detection time window is equal, and the number of detection time windows is equal to the number of reciprocating movements of the pressing plate in the monitoring period; aligning the midpoint of the first detection time window with the moment corresponding to the i-th arterial blood pressure value peak, and determining whether there is an arterial blood pressure value peak in other detection time windows, if not, aligning the midpoint of the first detection time window with the moment corresponding to the i+1-th arterial blood pressure value peak, and determining whether there is an arterial blood pressure value peak in other detection time windows, wherein i is a positive integer; when there is an arterial blood pressure value peak in all detection time windows, setting a peak window according to the arterial blood pressure value peak in the first detection time window, and determining whether the arterial blood pressure value peak is contained in the intersection of each detection time window and the peak window; if the arterial blood pressure value peak is contained in the intersection of each detection time window and the peak window, determining whether there is an arterial blood pressure value peak not in the detection time window; if there is no arterial blood pressure value peak not in the detection time window, directly determining that the second condition is not met; if there is an arterial blood pressure value peak not in the detection time window, determining the arterial blood pressure value peak not in the detection time window as the first peak value; if there is an arterial blood pressure value peak not belonging to the intersection of each detection time window and the peak window, but belonging to the detection time window and being higher than the upper limit of the peak window, determining the arterial blood pressure value peak as the first peak value, and determining the arterial blood pressure value peak not in the detection time window as the first peak value; if there is an arterial blood pressure value peak not belonging to the intersection of each detection time window and the peak window, but belonging to the detection time window and being lower than the lower limit of the peak window, moving the midpoint of the first detection time window to the moment corresponding to the next arterial blood pressure value peak until the arterial blood pressure value peaks belonging to the detection time window all belong to the peak window or are higher than the upper limit of the peak window; determining the arterial blood pressure value peak belonging to the intersection of the detection time window and the peak window as the second peak value; performing fast Fourier transform on the plurality of arterial blood pressure value peaks at the monitoring moments to obtain arterial blood pressure spectrum information; and determining the second condition according to the first peak value, the second peak value, and the arterial blood pressure spectrum information.

[0090] According to the embodiment of the present application, the peak value of the arterial blood pressure value at each monitoring time is obtained. The maximum value of the arterial blood pressure value at each monitoring time (i.e., the peak value of the arterial waveform) is the peak value of the arterial blood pressure value. Since the systolic pressure of the patient is higher than the diastolic pressure, the peak value of the arterial blood pressure value is the systolic pressure of the patient. Since the arterial blood pressure value will be increased and the peak value of the arterial blood pressure value will be generated when the compression is performed, and the peak value of the arterial blood pressure value will also be generated when the heart beats spontaneously, the peak value of the arterial blood pressure value generated passively by the compression and the peak value of the arterial blood pressure value generated actively by the spontaneous beating of the heart exist in the peak value of the arterial blood pressure value. Since the peak value of the arterial blood pressure value generated passively by the compression will be generated after each compression, the frequency of the peak value of the arterial blood pressure value generated passively by the compression is the same as the preset frequency, and the peak height is proportional to the preset compression depth. Since the preset frequency of the compression plate of the heart resuscitation device and the preset compression depth are unchanged in the same monitoring period, the time interval between the adjacent two peak values of the arterial blood pressure value generated passively by the compression and the height of the peak value of the arterial blood pressure value generated passively by the compression are basically the same and remain basically unchanged. Since the beating of the heart when the spontaneous beating of the heart is just recovered can be caused by hormones, nerves and other factors, the frequency of the peak value of the arterial blood pressure value generated actively by the spontaneous beating of the heart is faster at the beginning, and then gradually stable, which is obviously different from the rule that the frequency of the peak value of the arterial blood pressure value generated passively by the compression is basically unchanged. Since the compression to the compression depth needs a certain time (for example, 0.2 seconds), and the blood pumping efficiency is low, the spontaneous beating of the heart needs a very short time (i.e., the time length close to instant), and the blood pumping efficiency is high, therefore, when the patient recovers the circulation, the change rate of the peak value of the arterial blood pressure value generated passively by the compression will be obviously lower than the change rate of the peak value of the arterial blood pressure value generated actively by the spontaneous beating of the heart, and the peak value of the arterial blood pressure value generated actively by the spontaneous beating of the heart will be higher than the peak value of the arterial blood pressure value generated passively by the compression. Further, based on the difference between the peak value, the peak frequency and the peak change rate of the peak value of the arterial blood pressure value generated actively by the spontaneous beating of the heart and the peak value of the arterial blood pressure value generated passively by the compression, the two can be distinguished.

[0091] According to an embodiment of the present application, a plurality of detection time windows are set according to the time interval of the reciprocating movement of the pressing plate and the number of reciprocating movements of the pressing plate in the monitoring period, wherein the interval of the starting time of adjacent detection time windows is equal to the time interval of the reciprocating movement of the pressing plate, the length of each detection time window is equal, and the number of detection time windows is equal to the number of reciprocating movements of the pressing plate in the monitoring period. The time window can be 0.05 seconds, 0.1 seconds, etc. Since the pressing plate will delay the generation of the peak value of the arterial blood pressure value in the process of reaching the preset pressing depth, in other words, the time when the patient reaches the peak value of the arterial blood pressure value passively generated by pressing lags behind the time when the pressing plate reaches the preset pressing depth, that is, there is a certain time difference between the two times, and the time difference does not necessarily remain consistent, a plurality of detection time windows can be set, the interval of the starting time of adjacent detection time windows is equal to the time interval of the reciprocating movement of the pressing plate, the length of each detection time window is equal, and the number of detection time windows is equal to the number of reciprocating movements of the pressing plate in the monitoring period, so that the detection time window can include all the peak values of the arterial blood pressure value passively generated by pressing in the monitoring period when the detection time window is in the correct position, that is, there is only one peak value of the arterial blood pressure value passively generated by pressing in each detection time window, in other words, even if there is an error due to the above-mentioned time difference, the peak value of the arterial blood pressure value passively generated by pressing can be in the detection time window.

[0092] According to an embodiment of the present application, the midpoint of the first detection time window is aligned with the time corresponding to the i-th peak value of the arterial blood pressure value, and it is determined whether there is a peak value of the arterial blood pressure value in other detection time windows, if not, the midpoint of the first detection time window is aligned with the time corresponding to the i+1-th peak value of the arterial blood pressure value, and it is determined whether there is a peak value of the arterial blood pressure value in other detection time windows, wherein i is a positive integer. The midpoint of the first detection time window is aligned with the time corresponding to the i-th peak value of the arterial blood pressure value, and it is determined whether there is a peak value of the arterial blood pressure value in other detection time windows, since the detection time window can include all the peak values of the arterial blood pressure value passively generated by pressing in the monitoring period when the detection time window is in the correct position, if there is no peak value of the arterial blood pressure value in other detection time windows, it can be considered that the detection time window is in the wrong position (that is, in the current position, the peak value generated by the autonomous beating of the heart is in the first detection time window), then the midpoint of the first detection time window is aligned with the time corresponding to the i+1-th peak value of the arterial blood pressure value, and it is determined whether there is a peak value of the arterial blood pressure value in other detection time windows, and so on, until there is a peak value of the arterial blood pressure value in all detection time windows, it can be further determined whether the peak value of the arterial blood pressure value in each detection time window is a peak value of the arterial blood pressure value passively generated by pressing.

[0093] According to the embodiment of the present application, when the arterial blood pressure value peaks exist in all the detection time windows, a peak window is set according to the arterial blood pressure value peak in the first detection time window, and it is judged whether the arterial blood pressure value peak exists in the intersection of each detection time window and the peak window. When the arterial blood pressure value peaks exist in all the detection time windows, it can be considered that the detection time windows can be in the correct position, and it is further judged whether the arterial blood pressure value peaks in each detection time window are all the arterial blood pressure value peaks passively generated by pressing. Therefore, the peak window can be set according to the arterial blood pressure value peak in the first detection time window ± 10%, for example, the arterial blood pressure value peak in the first detection time window is 80 mmHg, and the peak window is [72 mmHg, 88 mmHg]. Since the arterial blood pressure value peaks passively generated by pressing are basically the same, the arterial blood pressure value peak in the peak window can be considered as the arterial blood pressure value peak passively generated by pressing, and it is judged whether the arterial blood pressure value peak exists in the intersection of each detection time window and the peak window.

[0094] According to the embodiment of the present application, if the arterial blood pressure value peak exists in the intersection of each detection time window and the peak window, it is judged whether there is an arterial blood pressure value peak not in the detection time window. Since the detection time window is in the correct position when it can include all the arterial blood pressure value peaks passively generated by pressing in the monitoring period, and the arterial blood pressure value peaks passively generated by pressing should all be in the peak window, if the arterial blood pressure value peak exists in the intersection of each detection time window and the peak window, it can be considered that the detection time window is in the correct position, and the intersection of each detection time window and the peak window frames all the arterial blood pressure value peaks passively generated by pressing. Further, it can be judged whether there is an arterial blood pressure value peak not in the detection time window, and whether the patient has a spontaneous heartbeat.

[0095] According to the embodiment of the present application, if there is no arterial blood pressure value peak not in the detection time window, it is directly determined that the second condition is not satisfied. If there is no arterial blood pressure value peak not in the detection time window, it can be considered that there is no arterial blood pressure value peak actively generated by the spontaneous heartbeat of the heart outside the detection time window, that is, the patient has no spontaneous heartbeat, and it is directly determined that the second condition is not satisfied.

[0096] According to the embodiment of the present application, if there is an arterial blood pressure value peak not in the detection time window, the arterial blood pressure value peak not in the detection time window is determined as the first peak. If there is an arterial blood pressure value peak not in the detection time window, it can be considered that there is an arterial blood pressure value peak generated by the heart voluntarily beating outside the detection time window, i.e., the patient generates voluntary heartbeat, and thus the arterial blood pressure value peak not in the detection time window can be determined as the arterial blood pressure value peak generated by the heart voluntarily beating, i.e., the first peak.

[0097] According to the embodiment of the present application, if there is an arterial blood pressure value peak not in the intersection of each detection time window and the peak window, but in the detection time window and higher than the upper limit of the peak window, the arterial blood pressure value peak is determined as the first peak. Since the arterial blood pressure value peak generated by the compression passively is basically the same, and the arterial blood pressure value peak generated by the heart voluntarily beating is higher than the arterial blood pressure value peak generated by the compression passively, if there is an arterial blood pressure value peak not in the intersection of each detection time window and the peak window, but in the detection time window and higher than the upper limit of the peak window, it can be considered that the arterial blood pressure value peak is the arterial blood pressure peak generated by the heart voluntarily beating, and the arterial blood pressure value peak generated by the compression passively coincides with the arterial blood pressure peak, and it can also be considered that the patient generates voluntary heartbeat, and thus the peak can be determined as the arterial blood pressure value peak generated by the heart voluntarily beating, i.e., the first peak. At this time, if there is an arterial blood pressure value peak not in the detection time window, it can also be determined as the first peak, i.e., the arterial blood pressure value peak generated by the heart voluntarily beating.

[0098] According to the embodiment of the present application, if there is an arterial blood pressure peak value which does not belong to the intersection of each detection time window and the peak value window, but belongs to the detection time window and is lower than the lower limit of the peak value window, the midpoint of the first detection time window is moved to the time corresponding to the next arterial blood pressure peak value until the arterial blood pressure peak values belonging to the detection time window all belong to the peak value window or are higher than the upper limit of the peak value window. If the position of the time window is correct, the time window includes the arterial blood pressure peak value passively generated due to the pressing, and if the arterial blood pressure peak value actively generated due to the active cardiac beating exists in the time window at the same time, the superimposed peak value will be higher, and there should be no arterial blood pressure peak value lower than the lower limit of the peak value window. Therefore, if there is an arterial blood pressure peak value which does not belong to the intersection of each detection time window and the peak value window, but belongs to the detection time window and is lower than the lower limit of the peak value window, it can be considered that the detection time window is at the wrong position (i.e., the arterial blood pressure peak value in the detection time window is actively generated due to the active cardiac beating, and the arterial blood pressure peak value passively generated due to the pressing is not superimposed), and the arterial blood pressure peak value passively generated due to the pressing cannot be in the intersection of the detection time window and the peak value window, and it is difficult to correctly distinguish the arterial blood pressure peak value actively generated due to the active cardiac beating. Therefore, the midpoint of the first detection time window is moved to the time corresponding to the next arterial blood pressure peak value until the arterial blood pressure peak values belonging to the detection time window all belong to the peak value window or are higher than the upper limit of the peak value window, i.e., the detection time window is at the correct position, and the correct peak value window can be determined, and the arterial blood pressure peak value actively generated due to the active cardiac beating can be correctly distinguished.

[0099] According to the embodiment of the present application, the arterial blood pressure peak value belonging to the intersection of the detection time window and the peak value window is determined as the second peak value. The arterial blood pressure peak value belonging to the intersection of the detection time window and the peak value window is the arterial blood pressure peak value passively generated due to the pressing, i.e., the second peak value.

[0100] According to the embodiment of the present application, the arterial blood pressure peak values at multiple monitoring times are subjected to fast Fourier transform to obtain arterial blood pressure spectrum information. The fast Fourier transform of the arterial blood pressure peak values at multiple monitoring times can obtain the energy distribution information of each arterial blood pressure peak value signal, i.e., the arterial blood pressure spectrum information.

[0101] According to the embodiment of the present application, the second condition is determined according to the first peak value, the second peak value and the arterial blood pressure spectrum information, including: determining an external force frequency according to the frequency of the reciprocating motion of the pressing plate; determining a second peak value frequency corresponding to the spectrum peak value closest to the external force frequency; determining the highest spectrum peak value except the spectrum peak value corresponding to the second peak value frequency; and obtaining a resuscitation judgment parameter R according to formula (1), (1),

[0102] wherein, is an average rising rate from the adjacent valley value before the jth first peak value to the jth first peak value, is an average rising rate from the adjacent valley value before the kth second peak value to the kth second peak value, is the number of the first peak values, is the number of the second peak values, is the second peak value frequency corresponding to the spectrum peak value, is the highest spectrum peak value other than the spectrum peak value corresponding to the second peak value frequency; determining that the recovery judgment parameter is higher than or equal to the preset parameter threshold as a second condition.

[0103] According to an embodiment of the present application, the external force frequency is determined according to the frequency of the reciprocating motion of the pressing plate. The frequency of the reciprocating motion of the pressing plate is the external force frequency.

[0104] According to an embodiment of the present application, the second peak value frequency corresponding to the spectrum peak value closest to the external force frequency is determined. Since there may be a small delay between the heartbeats and the pressing action when pressing, and the duration of the delay may not be constant, the external force frequency and the frequency of the peak value of the arterial blood pressure signal passively generated by pressing may have a small difference. Therefore, the second peak value frequency corresponding to the spectrum peak value closest to the external force frequency can be determined. The spectrum peak value can be considered as the spectrum peak value corresponding to the peak value of the arterial blood pressure signal passively generated by pressing, and the second peak value frequency is the frequency of the spectrum peak value of the arterial blood pressure passively generated by pressing.

[0105] According to an embodiment of the present application, the highest spectrum peak value other than the spectrum peak value corresponding to the second peak value frequency is determined. Since the arterial blood pressure spectrum information is obtained after determining that the patient generates autonomous heartbeats, and the autonomous heartbeat frequency and the external force pressing frequency are significantly different, in the arterial blood pressure spectrum information, there are other spectrum peak values other than the spectrum peak value corresponding to the second peak value frequency. Further, the highest spectrum peak value other than the spectrum peak value corresponding to the second peak value frequency can be considered as the spectrum peak value corresponding to the peak value of the arterial blood pressure signal actively generated by the autonomous heartbeat of the heart, and the spectrum peak value corresponding to the frequency of the peak value of the arterial blood pressure signal actively generated by the autonomous heartbeat of the heart. The frequency of the peak value of the arterial blood pressure passively generated by pressing.

[0106] According to an embodiment of the present application, in formula (1), The average rising rate from the adjacent valley value before the jth first peak value to the jth first peak value (i.e., the average slope of the waveform graph between the adjacent valley value before the jth first peak value and the jth first peak value) can be considered as the change rate of the peak value of the arterial blood pressure value actively generated by the heart autonomously beating, and therefore, represents the average value of the change rate of the peak value of the arterial blood pressure value actively generated by the heart autonomously beating, i.e., the average change rate of the peak value of the arterial blood pressure value actively generated by the heart autonomously beating. Similarly, may represent the average change rate of the peak value of the arterial blood pressure value passively generated by the compression. Further, the ratio of the average change rate of the peak value of the arterial blood pressure value actively generated by the heart autonomously beating to the average change rate of the peak value of the arterial blood pressure value passively generated by the compression may be used as a value describing the degree of the cardiac resuscitation reflected from the perspective of the peak value change rate, and can describe the significant degree of the cardiac resuscitation from the perspective of the peak value change rate. Since the change rate of the peak value of the arterial blood pressure value passively generated by the compression is significantly lower than the change rate of the peak value of the arterial blood pressure value actively generated by the heart autonomously beating (e.g., the change rate of the peak value of the arterial blood pressure value actively generated by the heart autonomously beating can sometimes be more than three times the change rate of the peak value of the arterial blood pressure value passively generated by the compression) when the patient recovers the circulation, the greater the above ratio, the greater the average change rate of the peak value of the arterial blood pressure value actively generated by the heart autonomously beating relative to the average change rate of the peak value of the arterial blood pressure value passively generated by the compression, and the higher the significant degree of the cardiac resuscitation reflected from the perspective of the peak value change rate.

[0107] According to the embodiment of the present application, in the formula (1), represents the ratio of the highest spectral peak value other than the spectral peak value corresponding to the second peak value frequency to the spectral peak value corresponding to the second peak value frequency, i.e., the ratio of the energy of the arterial blood pressure value peak signal actively generated by the heart autonomously beating to the energy of the arterial blood pressure value peak signal passively generated by the compression, which can be used as a value describing the degree of the cardiac resuscitation reflected from the perspective of the peak value frequency, and can describe the significant degree of the cardiac resuscitation from the perspective of the signal energy. Since the number of the heart autonomous beating increases and the energy in the signal also increases during the process of the patient recovering the circulation, the greater the above ratio, the greater the energy of the arterial blood pressure value peak signal actively generated by the heart autonomously beating relative to the energy of the arterial blood pressure value peak signal passively generated by the compression, and the higher the significant degree of the cardiac resuscitation reflected from the perspective of the signal energy. Of course, since the heart beats weakly in the stage of the cardiac resuscitation, the signal energy of the heart autonomous beating is usually lower than the signal energy of the external force compression, i.e., is less than 1.

[0108] According to an embodiment of the present application, the product of the value reflecting the degree of cardiac resuscitation from the perspective of signal energy and the value describing the degree of cardiac resuscitation from the perspective of peak change rate As the resuscitation judgment parameter, the greater the resuscitation judgment parameter, the higher the degree of cardiac resuscitation.

[0109] According to an embodiment of the present application, the resuscitation judgment parameter higher than or equal to a preset parameter threshold is determined as the second condition. The preset parameter threshold can be 0.8, 0.7, etc. When the resuscitation judgment parameter is higher than or equal to the preset parameter threshold, it can be considered that the average change rate of the peak value of the arterial blood pressure value actively generated by the spontaneous cardiac beat is high, and the signal energy of the spontaneous cardiac beat is also high, and it can be determined from the perspective of the arterial blood pressure value that the patient has a sign of cardiac resuscitation (i.e., the strength of the spontaneous cardiac beat is sufficient to maintain the vital signs of the patient), satisfying the second condition.

[0110] According to an embodiment of the present application, in step S43, it is determined that there is a sign of circulatory recovery when the first condition and the second condition are both satisfied. When the first condition and the second condition are both satisfied, it can be considered that from the perspective of the end-tidal carbon dioxide data, the patient's lung ventilation function and the cardiac blood volume have been greatly improved, or the lung ventilation function and the cardiac blood volume can maintain the basic metabolic needs of the patient, and the patient has a sign of pulmonary circulatory recovery, and from the perspective of the arterial blood pressure value, the patient has a sign of cardiac resuscitation, so it can be determined that the patient has a sign of circulatory recovery.

[0111] In this way, the first condition and the second condition can be set based on the end-tidal carbon dioxide data and the arterial blood pressure value, and then it can be determined that there is a sign of circulatory recovery when the first condition and the second condition are both satisfied. Considering the case that the frequency of the peak value of the arterial blood pressure value passively generated by the compression is relatively stable with the compression frequency, the frequency of the peak value of the arterial blood pressure value actively generated by the spontaneous cardiac beat is fast at the beginning and then gradually stable, and the change rate of the peak value of the arterial blood pressure value passively generated by the compression is significantly lower than the change rate of the peak value of the arterial blood pressure value actively generated by the spontaneous cardiac beat, the detection time window and the peak window are set, and the arterial blood pressure value peak can be distinguished based on the peak in the detection time window and the peak in the peak window. The accuracy, objectivity and comprehensiveness of the judgment of whether the patient has a sign of circulatory recovery are improved.

[0112] According to the embodiment of the present application, in step S5, if there is no sign of circulatory recovery, the presser plate control adjustment coefficient is determined according to the end-tidal carbon dioxide data, the arterial blood pressure value and the blood oxygen saturation at multiple monitoring time points in the monitoring period, comprising: determining multiple diastolic pressure data in the monitoring period according to the arterial blood pressure value, and determining the average value of the diastolic pressure data; determining the first relative gap between the average value of the diastolic pressure data and the set diastolic pressure threshold value; determining the second relative gap between the average value of the end-tidal carbon dioxide data and the set end-tidal carbon dioxide data threshold value; determining the third relative gap between the average value of the blood oxygen saturation and the set blood oxygen saturation threshold value; and determining the maximum value among the first relative gap, the second relative gap and the third relative gap as the presser plate control adjustment coefficient.

[0113] According to the embodiment of the present application, the multiple diastolic pressure data in the monitoring period are determined according to the arterial blood pressure value, and the average value of the diastolic pressure data is determined. Since the systolic pressure of the patient is higher than the diastolic pressure, the valley value of the arterial blood pressure waveform at each monitoring time point is the diastolic pressure data in the arterial blood pressure value at the monitoring time point. The ratio of the sum of the diastolic pressure data at each monitoring time point to the number of monitoring time points in the monitoring period is the average value of the diastolic pressure data.

[0114] According to the embodiment of the present application, the first relative gap between the average value of the diastolic pressure data and the set diastolic pressure threshold value is determined. The diastolic pressure of the patient when the sign of circulatory recovery is generated is determined by the medical staff according to the physical condition of the patient, which is the set diastolic pressure threshold value, for example, 20 mmHg, 25 mmHg, etc. The absolute value of the difference between the set diastolic pressure threshold value and the average value of the diastolic pressure data is the ratio of the set diastolic pressure threshold value, which is the first relative gap, and can describe the gap between the average value of the diastolic pressure data of the current patient and the diastolic pressure when the sign of circulatory recovery is generated.

[0115] According to the embodiment of the present application, the second relative gap between the average value of the end-tidal carbon dioxide data and the set end-tidal carbon dioxide data threshold value is determined. The end-tidal carbon dioxide data of the patient when the sign of circulatory recovery is generated is determined by the medical staff according to the physical condition of the patient, which is the set end-tidal carbon dioxide data threshold value, for example, 15 mmHg, 20 mmHg, etc. The ratio of the sum of the end-tidal carbon dioxide data at each monitoring time point to the number of monitoring time points in the monitoring period is the average value of the end-tidal carbon dioxide data. The absolute value of the difference between the set end-tidal carbon dioxide data threshold value and the average value of the end-tidal carbon dioxide data is the ratio of the set end-tidal carbon dioxide data threshold value, which is the second relative gap, and can describe the gap between the average value of the end-tidal carbon dioxide data of the current patient and the end-tidal carbon dioxide data when the sign of circulatory recovery is generated.

[0116] According to an embodiment of the present application, a third relative gap between the average of the blood oxygen saturation and a set blood oxygen saturation threshold is determined. The blood oxygen saturation of the patient when the sign of circulation recovery is generated is determined by the medical staff according to the physical condition of the patient, and is the set blood oxygen saturation threshold, for example, 90%. Similar to the determination of the second relative gap, the third relative gap can be determined, which describes the gap between the average of the current blood oxygen saturation of the patient and the blood oxygen saturation when the sign of circulation recovery is generated.

[0117] According to an embodiment of the present application, the maximum of the first relative gap, the second relative gap and the third relative gap is determined as the pressing plate control adjustment coefficient. The first relative gap can describe the gap between the average of the current diastolic blood pressure data of the patient and the diastolic blood pressure when the sign of circulation recovery is generated, and can also describe the relative gap between the current pressing depth of the pressing plate determined based on the diastolic blood pressure data and the pressing depth of the pressing plate required when the sign of circulation recovery is generated, which can be used as a candidate value of the pressing plate control adjustment coefficient determined based on the diastolic blood pressure data. Similarly, the second relative gap can be used as a candidate value of the pressing plate control adjustment coefficient determined based on the end-tidal carbon dioxide data, and the third relative gap can be used as a candidate value of the pressing plate control adjustment coefficient determined based on the blood oxygen saturation. Since the diastolic blood pressure data, the end-tidal carbon dioxide data and the blood oxygen saturation data of the patient should all reach the level when the sign of circulation recovery is generated when the circulation of the patient is recovered, the maximum of the first relative gap, the second relative gap and the third relative gap can be determined as the pressing plate control adjustment coefficient. When there is no sign of circulation recovery, the product of the preset pressing depth of the current monitoring period and 1+A can be used as a candidate value of the pressing depth, and the smaller one between the candidate value of the pressing depth and the maximum pressing depth is set as the preset pressing depth of the next monitoring period, where A is the pressing plate control adjustment coefficient, so as to increase the pressing depth, so that the diastolic blood pressure data, the end-tidal carbon dioxide data and the blood oxygen saturation data of the patient are increased to the level when the sign of circulation recovery is generated in the pressing process of the next monitoring period, and the circulation recovery of the patient is accelerated.

[0118] According to the embodiment of the present application, in step S6, the number of monitoring time points included in the next monitoring period is determined according to the number of monitoring time points in the monitoring period, and the end-tidal carbon dioxide data, the arterial blood pressure value and the blood oxygen saturation, including: determining the upward rounding value of the product of the number of monitoring time points in the monitoring period and 1+A as the number of monitoring time points included in the next monitoring period, wherein A is a pressing plate control adjustment coefficient. For example, A is 0.2, the number of monitoring time points in the monitoring period is 22, the product of the number of monitoring time points in the monitoring period and 1+A is 26.4, and the upward rounding value is 27, so the number of monitoring time points included in the next monitoring period is 27. The number of monitoring time points included in the next monitoring period can be increased, and the length of the next monitoring period can be increased when there is no sign of circulatory recovery, so that the monitoring intensity of the patient's physiological indicators in the next monitoring period can be increased.

[0119] In this way, the pressing plate control adjustment coefficient can be determined based on the end-tidal carbon dioxide data, the arterial blood pressure value and the blood oxygen saturation of the monitoring time points in the monitoring period. Considering that when the patient recovers circulation, the diastolic blood pressure data, the end-tidal carbon dioxide data and the blood oxygen saturation data should reach the level when the sign of circulatory recovery is generated, and the length of the next monitoring period is appropriately adjusted to increase the treatment intensity and the monitoring intensity of the patient. The accuracy, objectivity and comprehensiveness of the determination of the pressing plate control adjustment coefficient are improved.

[0120] According to the embodiment of the present application, in step S7, if there is a sign of circulatory recovery, the number of monitoring time points included in the next monitoring period is determined according to the end-tidal carbon dioxide data, the arterial blood pressure value and the blood oxygen saturation of the monitoring time points in the monitoring period, and the support intensity adjustment data is set, including: obtaining the first maximum value of the end-tidal carbon dioxide data, the second maximum value of the first peak value and the third maximum value of the blood oxygen saturation; determining the fourth relative difference between the first maximum value and the set end-tidal carbon dioxide data threshold value; determining the fifth relative difference between the second maximum value and the set systolic blood pressure threshold value; determining the sixth relative difference between the blood oxygen saturation and the set blood oxygen saturation threshold value; determining the upward rounding value of the product of the number of monitoring time points in the monitoring period and the difference between 1 and the minimum value of the fourth relative difference, the fifth relative difference and the sixth relative difference as the number of monitoring time points included in the next monitoring period; and determining the support intensity adjustment data of the tth monitoring time point of the next monitoring period according to formula (2) , (2),

[0121] wherein, L is the number of monitoring instants included in the next monitoring period, L is a preset pressing depth, t≤ , and t and are positive integers.

[0122] According to an embodiment of the present application, a first maximum value of end-tidal carbon dioxide data, a second maximum value of a first peak value and a third maximum value of blood oxygen saturation are obtained. The maximum value of end-tidal carbon dioxide data at each monitoring instant in the current monitoring period is the first maximum value, the maximum value of the first peak value is the second maximum value, and the maximum value of blood oxygen saturation is the third maximum value. The first maximum value can describe the optimal end-tidal carbon dioxide data level of the patient in the circulation recovery process, the second maximum value can describe the optimal first peak value (i.e., the peak value of the arterial blood pressure value actively generated by the spontaneous beating of the heart) level of the patient in the circulation recovery process, since the systolic pressure is always higher than the diastolic pressure, the first peak value is always the systolic pressure, and therefore, the second maximum value can also describe the optimal systolic pressure level of the patient in the circulation recovery process, and the third maximum value can describe the optimal blood oxygen saturation level of the patient in the circulation recovery process.

[0123] According to an embodiment of the present application, similar to the determination of the second relative gap, a fourth relative gap between the first maximum value and a set end-tidal carbon dioxide data threshold value, a fifth relative gap between the second maximum value and a set systolic pressure threshold value, and a sixth relative gap between the blood oxygen saturation and a set blood oxygen saturation threshold value can be determined. The systolic pressure of the patient when the circulation recovery sign is generated, which is determined by the medical staff according to the physical condition of the patient, is the systolic pressure threshold value (for example, 80 mmHg, 90 mmHg, etc.). The fourth relative gap can describe the difference between the optimal end-tidal carbon dioxide data of the patient in the circulation recovery process and the end-tidal carbon dioxide data when the circulation recovery sign is generated. The fifth relative gap can describe the difference between the optimal systolic pressure of the patient in the circulation recovery process and the systolic pressure when the circulation recovery sign is generated. The sixth relative gap can describe the difference between the optimal blood oxygen saturation of the patient in the circulation recovery process and the blood oxygen saturation when the circulation recovery sign is generated.

[0124] According to an embodiment of the present application, the difference between 1 and the minimum value of the fourth relative gap, the fifth relative gap and the sixth relative gap is multiplied by the number of monitoring time points in the monitoring period, and the up-rounded value of the product is determined as the number of monitoring time points included in the next monitoring period. Since the patient has shown signs of circulatory recovery, the minimum value of the fourth relative gap, the fifth relative gap and the sixth relative gap can describe the margin between the actual condition of the patient in the circulatory recovery process and the threshold value. The difference between 1 and the minimum value of the fourth relative gap, the fifth relative gap and the sixth relative gap is multiplied by the number of monitoring time points in the monitoring period, and the up-rounded value of the product is determined as the number of monitoring time points included in the next monitoring period. For example, the difference between 1 and the minimum value of the fourth relative gap, the fifth relative gap and the sixth relative gap is 0.8, the number of monitoring time points in the monitoring period is 22, the product of 0.8 and 22 is up-rounded to 18, and the number of monitoring time points included in the next monitoring period is 18. Since the patient needs to be continuously monitored after showing signs of circulatory recovery, and direct stop of the work of the cardiac resuscitation apparatus can lead to rescue failure, the number of monitoring time points included in the next monitoring period can be reduced based on the best recovery condition of the patient, so as to reduce the monitoring intensity of the physiological indicators of the patient in the next monitoring period and provide a buffer for stopping the work of the cardiac resuscitation apparatus.

[0125] According to an embodiment of the present application, in formula (2), The ratio of the tth monitoring time point of the next monitoring period to the number of monitoring time points included in the next monitoring period is represented, and the difference between 1 and the ratio can be used as a support intensity adjustment coefficient of the tth time point. The closer the tth time point is to the last monitoring time point of the next monitoring period, that is, the closer the tth time point is to the time point at which the work of the cardiac resuscitation apparatus is stopped, the smaller the support intensity adjustment coefficient is. Further, the product of the above support intensity adjustment coefficient and the preset compression depth As the support intensity adjustment data of the tth monitoring time point of the next monitoring period, the compression depth of the tth monitoring time point of the next monitoring period can be determined based on the above support intensity adjustment data, so as to gradually reduce the compression depth in the next monitoring period, and further provide a buffer for stopping the work of the cardiac resuscitation apparatus, avoiding direct stop of the work of the cardiac resuscitation apparatus leading to rescue failure.

[0126] According to the embodiment of the present application, in step S8, at the end of the next monitoring period, a test period is set, the end-tidal carbon dioxide, arterial blood pressure value and blood oxygen saturation in the test period are obtained, and it is determined whether to stop the operation of the cardiac resuscitation device. The test period is close to the length of the monitoring period, for example, 10 seconds, 15 seconds, etc. At the end of the next monitoring period, a test period is set, no external force compression is performed in the test period, and the end-tidal carbon dioxide, arterial blood pressure value and blood oxygen saturation in the test period are obtained, and at the same time, the safety threshold values of the end-tidal carbon dioxide, arterial blood pressure value and blood oxygen saturation are set, for example, the safety threshold value of the end-tidal carbon dioxide is 20 mmHg, the safety threshold value of the diastolic pressure of the arterial blood pressure value is 25 mmHg, the safety threshold value of the systolic pressure is 90 mmHg, and the safety threshold value of the blood oxygen saturation is 90%. When the end-tidal carbon dioxide, arterial blood pressure value and blood oxygen saturation in the test period are all maintained above the safety threshold values, it is considered that the patient's heart can maintain spontaneous beating, circulation is restored, and rescue is successful, and the operation of the cardiac resuscitation device can be stopped.

[0127] In this way, based on the end-tidal carbon dioxide data, arterial blood pressure value and blood oxygen saturation at multiple monitoring moments in the monitoring period, the number of monitoring moments included in the next monitoring period and the support force adjustment data are determined, and a test period is set to determine whether to stop the operation of the cardiac resuscitation device. Considering the situation that directly stopping the operation of the cardiac resuscitation device after the patient shows signs of circulation recovery may lead to rescue failure, the number of monitoring moments included in the next monitoring period can be reduced and the compression depth can be gradually reduced, providing a one-period buffer time for stopping the operation of the cardiac resuscitation device. The accuracy and real-time performance of the compression force determination are improved, and the efficiency of cardiopulmonary resuscitation is improved.

[0128] The emergency cardiac resuscitation pressure control method and system according to the embodiment of the present application can contact a pressing plate to the chest of a patient, control the reciprocating movement of the pressing plate according to a preset frequency and a preset pressing depth, and acquire the end-tidal carbon dioxide, arterial blood pressure value and blood oxygen saturation of the patient, and then determine whether there is a circulation recovery sign, if there is no circulation recovery sign, determine the pressing plate control adjustment coefficient, and determine the number of monitoring time points included in the next monitoring period, and if there is a circulation recovery sign, determine the number of monitoring time points included in the next monitoring period, and set the support force adjustment data, and then determine whether to stop the operation of the cardiac resuscitation device. The pressing force can be dynamically adjusted in real time based on the physiological indicators of the patient, the accuracy and real-time performance of the pressing force determination are improved, and the efficiency of the cardiopulmonary resuscitation is improved. The pressing plate can be contacted to the chest of the patient, the reciprocating movement of the pressing plate can be controlled according to the preset frequency and the preset pressing depth, and the end-tidal carbon dioxide, arterial blood pressure value and blood oxygen saturation of the patient can be acquired at multiple monitoring time points, to provide basic data for determining whether there is a circulation recovery sign. When determining whether there is a circulation recovery sign, the end-tidal carbon dioxide data and the arterial blood pressure value can be used to set the first condition and the second condition, and then in the case that the first condition and the second condition are met at the same time, it is determined that there is a circulation recovery sign. The frequency of the peak value of the arterial blood pressure value passively generated by the pressing is relatively stable with the pressing frequency, the frequency of the peak value of the arterial blood pressure value actively generated by the autonomous beating of the heart is relatively fast at the beginning and then gradually stable, and the change rate of the peak value of the arterial blood pressure value passively generated by the pressing is obviously lower than the change rate of the peak value of the arterial blood pressure value actively generated by the autonomous beating of the heart, the detection time window and the peak value window are set, and the peak value of the arterial blood pressure value can be distinguished based on the peak value in the detection time window and the peak value window. The accuracy, objectivity and comprehensiveness of the judgment of whether the patient has a circulation recovery sign are improved. When determining the pressing plate control adjustment coefficient, the end-tidal carbon dioxide data, the arterial blood pressure value and the blood oxygen saturation at multiple monitoring time points in the monitoring period can be used to determine the pressing plate control adjustment coefficient. The diastolic pressure data, the end-tidal carbon dioxide data and the blood oxygen saturation data of the patient should reach the level when the circulation recovery sign is generated when the patient recovers the circulation, the length of the next monitoring period is appropriately adjusted, and the treatment and monitoring of the patient are strengthened. The accuracy, objectivity and comprehensiveness of the determination of the pressing plate control adjustment coefficient are improved. Further, the end-tidal carbon dioxide data, the arterial blood pressure value and the blood oxygen saturation at multiple monitoring time points in the monitoring period can be used to determine the number of monitoring time points included in the next monitoring period and the support force adjustment data, and a test period is set to determine whether to stop the operation of the cardiac resuscitation device.The number of monitoring time points included in the next monitoring period can be reduced and the compression depth is gradually reduced to provide a monitoring period buffer time for stopping the operation of the cardiac resuscitation device, which can reduce the situation that the patient directly stops the operation of the cardiac resuscitation device after the circulation recovery sign is generated, improve the accuracy and real-time performance of the compression force determination, and improve the efficiency of the cardiopulmonary resuscitation.

[0129] Figure 3 An example of a block diagram of an emergency cardiac resuscitation pressure control system according to an embodiment of the present application is shown, and the system comprises:

[0130] A contact module contacts a compression plate to a patient's chest before cardiac resuscitation is performed using a cardiac resuscitation device;

[0131] A reciprocating motion module controls the reciprocating motion of the compression plate according to a preset frequency and a preset compression depth after starting cardiopulmonary resuscitation;

[0132] An acquisition module acquires end-tidal carbon dioxide, arterial blood pressure, and blood oxygen saturation of the patient at multiple monitoring time points;

[0133] A first judgment module determines whether there is a circulation recovery sign according to the end-tidal carbon dioxide data and the arterial blood pressure at the multiple monitoring time points in the monitoring period at the end of the monitoring period;

[0134] A control adjustment coefficient module determines a control adjustment coefficient of the compression plate according to the end-tidal carbon dioxide data, the arterial blood pressure, and the blood oxygen saturation at the multiple monitoring time points in the monitoring period if there is no circulation recovery sign;

[0135] A monitoring time point number module determines the number of monitoring time points included in the next monitoring period according to the number of the multiple monitoring time points in the monitoring period and the end-tidal carbon dioxide data, the arterial blood pressure, and the blood oxygen saturation;

[0136] A support force adjustment data module determines the number of monitoring time points included in the next monitoring period according to the end-tidal carbon dioxide data, the arterial blood pressure, and the blood oxygen saturation at the multiple monitoring time points in the monitoring period and sets support force adjustment data if there is a circulation recovery sign;

[0137] A second judgment module sets a test period, acquires the end-tidal carbon dioxide, the arterial blood pressure, and the blood oxygen saturation in the test period, and determines whether to stop the operation of the cardiac resuscitation device at the end of the next monitoring period.

[0138] The present application can be a method, device, system and / or computer program product. The computer program product can include a computer readable storage medium on which is loaded a computer readable program instruction for performing various aspects of the present application.

[0139] Those skilled in the art should understand that the above description and the embodiments of the application shown in the drawings are only examples and do not limit the application. The purpose of the application has been fully and effectively achieved. The functional and structural principles of the application have been demonstrated and described in the embodiments, and the embodiments of the application can be modified or changed in any way without departing from the principles.

[0140] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, and are not limiting; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that the technical solutions recorded in the foregoing embodiments can still be modified, or some or all of the technical features can be replaced by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A method of emergency cardiac resuscitation pressure control, characterized by, The method comprises the following steps: Before starting the cardiac resuscitation, the pressing plate is contacted with the chest of the patient; After starting the cardiopulmonary resuscitation, the pressing plate is controlled to move back and forth at a preset frequency and a preset pressing depth; At multiple monitoring time points, the end-tidal carbon dioxide, the arterial blood pressure value and the blood oxygen saturation of the patient are obtained; At the end of the monitoring period, whether there is a circulation recovery sign is determined according to the end-tidal carbon dioxide data and the arterial blood pressure value at the multiple monitoring time points in the monitoring period; If there is no circulation recovery sign, an adjustment coefficient of the pressing plate control is determined according to the end-tidal carbon dioxide data, the arterial blood pressure value and the blood oxygen saturation at the multiple monitoring time points in the monitoring period; According to the number of the multiple monitoring time points in the monitoring period and the end-tidal carbon dioxide data, the arterial blood pressure value and the blood oxygen saturation, the number of the monitoring time points included in the next monitoring period is determined; If there is a circulation recovery sign, the number of the monitoring time points included in the next monitoring period is determined according to the end-tidal carbon dioxide data, the arterial blood pressure value and the blood oxygen saturation at the multiple monitoring time points in the monitoring period, and the support intensity adjustment data is set; At the end of the next monitoring period, a test period is set, the end-tidal carbon dioxide, the arterial blood pressure value and the blood oxygen saturation in the test period are obtained, and whether to stop the operation of the cardiac resuscitation device is determined.

2. The emergency cardiac resuscitation pressure control method of claim 1, wherein, At the end of the monitoring period, whether there is a circulation recovery sign is determined according to the end-tidal carbon dioxide data and the arterial blood pressure value at the multiple monitoring time points in the monitoring period, comprising: The first condition is that the first change rate of the end-tidal carbon dioxide data between the continuous preset number of monitoring time points is higher than the first change rate threshold, or the end-tidal carbon dioxide data of the continuous preset number of monitoring time points is all higher than the first data threshold; The second condition is set according to the arterial blood pressure value; If the first condition and the second condition are met at the same time, it is determined that there is a circulation recovery sign.

3. The emergency cardiac resuscitation pressure control method of claim 2, wherein, The second condition is set according to the arterial blood pressure value, comprising: The peak values of the arterial blood pressure values at the multiple monitoring time points are obtained; According to the time interval of the back and forth movement of the pressing plate and the number of the back and forth movement of the pressing plate in the monitoring period, a plurality of detection time windows are set, wherein the interval of the starting time points of adjacent detection time windows is equal to the time interval of the back and forth movement of the pressing plate, and the lengths of each detection time window are equal, and the number of the detection time windows is equal to the number of the back and forth movement of the pressing plate in the monitoring period; The midpoint of the first detection time window is aligned with the time point corresponding to the i-th peak value of the arterial blood pressure value, and whether there is a peak value of the arterial blood pressure value in other detection time windows is determined, if not, the midpoint of the first detection time window is aligned with the time point corresponding to the i+1-th peak value of the arterial blood pressure value, and whether there is a peak value of the arterial blood pressure value in other detection time windows is determined, wherein i is a positive integer; When there is a peak value of the arterial blood pressure value in all detection time windows, a peak window is set according to the peak value of the arterial blood pressure value in the first detection time window, and whether the peak value of the arterial blood pressure value is contained in the intersection of each detection time window and the peak window is judged. If the intersection of each detection time window and the peak window contains the peak of the arterial blood pressure value, it is determined whether there is a peak of the arterial blood pressure value not in the detection time window; If there is no peak of the arterial blood pressure value not in the detection time window, it is directly determined that the second condition is not met; If there is a peak of the arterial blood pressure value not in the detection time window, the peak of the arterial blood pressure value not in the detection time window is determined as the first peak; If there is a peak of the arterial blood pressure value not belonging to the intersection of each detection time window and the peak window, but belonging to the detection time window and being higher than the upper limit of the peak window, the peak of the arterial blood pressure value is determined as the first peak, and the peak of the arterial blood pressure value not in the detection time window is determined as the first peak; If there is a peak of the arterial blood pressure value not belonging to the intersection of each detection time window and the peak window, but belonging to the detection time window and being lower than the lower limit of the peak window, the midpoint of the first detection time window is moved to the time corresponding to the next peak of the arterial blood pressure value until the peaks of the arterial blood pressure value belonging to the detection time window all belong to the peak window or are higher than the upper limit of the peak window; The peak of the arterial blood pressure value belonging to the intersection of the detection time window and the peak window is determined as the second peak; The peaks of the arterial blood pressure value at multiple monitoring times are subjected to fast Fourier transform to obtain arterial blood pressure spectrum information; According to the first peak, the second peak and the arterial blood pressure spectrum information, the second condition is determined.

4. The emergency cardiac resuscitation pressure control method of claim 3, wherein, According to the first peak, the second peak and the arterial blood pressure spectrum information, the second condition is determined, including: According to the frequency of the reciprocating motion of the pressing plate, the external force frequency is determined; The second peak frequency corresponding to the spectrum peak closest to the external force frequency is determined; The highest spectrum peak other than the spectrum peak corresponding to the second peak frequency is determined; According to the formula ， a resuscitation judgment parameter R is obtained, wherein is an average rising rate from an adjacent valley value before the jth first peak value to the jth first peak value, is an average rising rate from an adjacent valley value before the kth second peak value to the kth second peak value, is the number of first peak values, is the number of second peak values, is a spectrum peak value corresponding to the second peak value frequency, is the highest spectrum peak value except for the spectrum peak value corresponding to the second peak value frequency. The resuscitation judgment parameter higher than or equal to the preset parameter threshold is determined as the second condition.

5. The emergency cardiac resuscitation pressure control method of claim 1, wherein, If there is no sign of circulatory recovery, the pressing plate control adjustment coefficient is determined according to the end-tidal carbon dioxide data, the arterial blood pressure value and the blood oxygen saturation at multiple monitoring times in a monitoring period, including: According to the arterial blood pressure value, multiple diastolic pressure data in the monitoring period are determined, and the average diastolic pressure data is determined; The first relative gap between the average diastolic pressure data and the set diastolic pressure threshold is determined; The second relative gap between the average of the end-tidal carbon dioxide data and the set end-tidal carbon dioxide data threshold is determined; The third relative gap between the average of the blood oxygen saturation and the set blood oxygen saturation threshold is determined; The maximum value among the first relative gap, the second relative gap and the third relative gap is determined as the pressing plate control adjustment coefficient.

6. The emergency cardiac resuscitation pressure control method of claim 2, wherein, According to the number of multiple monitoring times in a monitoring period, and the end-tidal carbon dioxide data, the arterial blood pressure value and the blood oxygen saturation, the number of monitoring times included in the next monitoring period is determined, including: The upward integer value of the product of the number of multiple monitoring times in the monitoring period and 1+A is determined as the number of monitoring times included in the next monitoring period, where A is the pressing plate control adjustment coefficient.

7. The emergency cardiac resuscitation pressure control method of claim 3, wherein, If there is a sign of circulation recovery, the number of monitoring time points included in the next monitoring period is determined according to the end-tidal carbon dioxide data, arterial blood pressure value and blood oxygen saturation at multiple monitoring time points in the monitoring period, and support intensity adjustment data is set, including: a first maximum value of the end-tidal carbon dioxide data, a second maximum value of the first peak value and a third maximum value of the blood oxygen saturation are obtained; a fourth relative gap between the first maximum value and a set end-tidal carbon dioxide data threshold value is determined; a fifth relative gap between the second maximum value and a set systolic blood pressure threshold value is determined; a sixth relative gap between the blood oxygen saturation and a set blood oxygen saturation threshold value is determined; a difference between 1 and the minimum value of the fourth relative gap, the fifth relative gap and the sixth relative gap is multiplied by the upward integer value of the number of multiple monitoring time points in the monitoring period to determine the number of monitoring time points included in the next monitoring period; the formula ， Support intensity adjustment data of a tth monitoring moment of a next monitoring period is determined , wherein is a preset pressing depth, t≤ , and t and are positive integers.

8. An emergency cardiac resuscitation pressure control system for performing the method of any one of claims 1-7, characterized by, including: a contact module, which contacts the compression plate to the patient's chest before cardiac resuscitation using a cardiac resuscitation instrument; a reciprocating motion module, which controls the reciprocating motion of the compression plate according to a preset frequency and a preset compression depth after starting cardiopulmonary resuscitation; an acquisition module, which acquires the end-tidal carbon dioxide, arterial blood pressure value and blood oxygen saturation of the patient at multiple monitoring time points; a first judgment module, which determines whether there is a sign of circulation recovery according to the end-tidal carbon dioxide data and arterial blood pressure value at multiple monitoring time points in the monitoring period at the end of the monitoring period; a control adjustment coefficient module, which determines the control adjustment coefficient of the compression plate according to the end-tidal carbon dioxide data, arterial blood pressure value and blood oxygen saturation at multiple monitoring time points in the monitoring period if there is no sign of circulation recovery; a monitoring time point number module, which determines the number of monitoring time points included in the next monitoring period according to the number of multiple monitoring time points in the monitoring period and the end-tidal carbon dioxide data, arterial blood pressure value and blood oxygen saturation; a support intensity adjustment data module, which determines the number of monitoring time points included in the next monitoring period according to the end-tidal carbon dioxide data, arterial blood pressure value and blood oxygen saturation at multiple monitoring time points in the monitoring period and sets support intensity adjustment data if there is a sign of circulation recovery; a second judgment module, which sets a test period, acquires the end-tidal carbon dioxide, arterial blood pressure value and blood oxygen saturation in the test period and determines whether to stop the operation of the cardiac resuscitation instrument at the end of the next monitoring period.

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