CN116725849A

CN116725849A - Cardiopulmonary resuscitation device and method

Info

Publication number: CN116725849A
Application number: CN202310776249.0A
Authority: CN
Inventors: 霍光研; 刘慧蕊
Original assignee: Xuanwu Hospital
Current assignee: Xuanwu Hospital
Priority date: 2023-06-28
Filing date: 2023-06-28
Publication date: 2023-09-12

Abstract

A cardiopulmonary resuscitation device, comprising: a compression module for compressing the chest of the patient, configured to perform a compression action according to the control signal from the calculation module; a chest height sensing module configured to monitor and transmit patient chest height signals; a pulse sensing module configured to monitor and transmit a patient's raw pulse signal; an blood oxygen sensing module configured to monitor and transmit a patient blood oxygen saturation signal; a ventilation module configured to deliver respiratory gas to an airway of a patient; the computing module receives the patient chest height signal, the raw pulse signal and the blood oxygen saturation signal, wherein when the patient is placed under the compression module to receive cardiopulmonary resuscitation, the computing module adjusts at least one operating parameter of the compression module and/or the ventilation module in a manner associated with the patient chest height signal, the raw pulse signal and the blood oxygen saturation signal, and the device mechanically and automatically provides variable-parameter compression and ventilation to the patient.

Description

Cardiopulmonary resuscitation device and method

Technical Field

The invention relates to the field of cardiopulmonary resuscitation, in particular to a cardiopulmonary resuscitation device and method.

Background

Cardiopulmonary resuscitation (Cardiopulmonary Resuscitation, CPR for short) is an emergency rescue measure for the treatment of patients suffering from sudden cardiac arrest. The method maintains brain function of the patient by simulating the functions of the heart and respiratory organs until it naturally resumes breathing and blood circulation. If a patient with cardiac arrest fails to perform cardiopulmonary resuscitation in time, the tissue and organ will be irreversibly damaged after 4 to 6 minutes. Therefore, cardiopulmonary resuscitation must be performed immediately when sudden cardiac arrest occurs in order to struggle for further rescuing the patient.

The principle of cardiopulmonary resuscitation is to make the heart generate air flow by external force to maintain the normal operation of the basic circulatory system in the body. When cardiopulmonary resuscitation is performed, the rescuer will perform chest compressions to the patient's heart with sufficient pressure to force the blood in the heart out. When the chest pressure is released, the patient can inhale fresh oxygen, and the lung can expand along with the airflow to promote oxygen inhalation. Chest compressions are one method of operation by compressing the chest and heart, squeezing the heart to create an airflow.

However, even for professionals, the frequency and depth of chest compressions is difficult to achieve a constant, efficient ideal compression standard. This is because chest compressions require a certain skill and the physical structure and state of each person are different, so that it is difficult to perform accurate operation. If the compression stroke is too shallow, an effective compression effect cannot be achieved, and if the compression stroke is too deep, excessive collapse of the chest of the patient may be caused, even fracture of the sternum of the patient may be caused, and secondary injury is caused to the patient.

In addition, how to timely judge the recovery of the patient from the spontaneous circulation (Restoration of Spontaneous Circulation, ROSC) and stop the chest compressions after the patient recovers from the spontaneous circulation is also one of the problems to be solved. If the patient has recovered the spontaneous circulation, the chest compression is continued, which will cause excessive compression to the heart of the patient, resulting in a decrease in coronary blood flow, resulting in myocardial ischemia and even necrosis; or to affect normal heart rhythms and even cause cardiac arrest.

Furthermore, there are differences in one aspect due to understanding to those skilled in the art; on the other hand, since the applicant has studied a lot of documents and patents while making the present invention, the text is not limited to details and contents of all but it is by no means the present invention does not have these prior art features, but the present invention has all the prior art features, and the applicant remains in the background art to which the right of the related prior art is added.

Disclosure of Invention

In view of the deficiencies of the prior art, the present invention provides a cardiopulmonary resuscitation device, comprising,

a compression module for compressing the chest of the patient, configured to perform a compression action according to the control signal from the calculation module;

a chest height sensing module configured to monitor and transmit patient chest height signals;

a pulse sensing module configured to monitor and transmit a patient's raw pulse signal;

an blood oxygen sensing module configured to monitor and transmit a patient blood oxygen saturation signal;

a ventilation module configured to deliver respiratory gas to an airway of a patient;

the system further includes a computing module that receives the patient chest height signal, the raw pulse signal, and the blood oxygen saturation signal, wherein the computing module adjusts at least one operating parameter of the compression module and/or the ventilation module in a manner that correlates the patient chest height signal, the raw pulse signal, and the blood oxygen saturation signal when the patient is placed under the compression module to receive cardiopulmonary resuscitation.

Preferably, in the case where the chest height sensing module detects two chest heights of the patient's chest height when the compression module is pressed and lifted and transmits the detected chest heights to the calculation module, the calculation module can determine the patient's chest collapse height based on a difference between the two chest heights, and then, when the chest collapse height is in a first range, the calculation module controls the ventilation module to deliver oxygen to the patient at a first gas delivery amount.

Preferably, the calculation module controls the ventilation module to deliver oxygen to the patient at a second gas delivery rate when the chest collapse height is in a second range, wherein the first range is greater than the second range and the second gas delivery rate is less than the first gas delivery rate.

Preferably, the calculation module is capable of adjusting the value of the first gas delivery amount given by the ventilation module when determining that the blood oxygen saturation signal of the patient is located in the corresponding blood oxygen saturation interval, wherein the first gas delivery amount is configured as the first horizontal gas delivery amount when the blood oxygen saturation signal is lower than the lower limit of the blood oxygen saturation interval, and the first gas delivery amount is configured as the second horizontal gas delivery amount when the blood oxygen saturation signal is higher than the lower limit of the blood oxygen saturation interval, and the first horizontal gas delivery amount is greater than the second horizontal gas delivery amount.

Preferably, when the blood oxygen saturation signal is higher than the lower limit of the corresponding blood oxygen saturation interval, the calculation module determines an adjustment mode of the increase and/or decrease of the first gas delivery amount within the second horizontal gas delivery amount based on the trend prediction of the blood oxygen saturation.

Preferably, the first gas delivery amount is changed in such a manner that the ventilation amount gradually decreases with the number of presses within the second horizontal gas delivery amount in a tendency that the current blood oxygen saturation signal is changed in the increasing direction.

Preferably, the first gas delivery amount is changed in such a manner that the ventilation amount increases with the number of presses within the second horizontal gas delivery amount in a trend that the current blood oxygen saturation signal is changed in the decreasing direction, and the first gas delivery amount is switched to the first horizontal gas delivery amount when the blood oxygen saturation signal is lower than the lower limit of the above blood oxygen saturation section.

Preferably, the calculation module outputs a compression depth control signal based on a comparison of the patient chest height signal with a preset chest collapse degree-compression number relation curve, and the compression module determines the compression depth according to the compression depth control signal and performs a corresponding compression action.

Preferably, in the case where the chest collapse height is greater than the expected chest collapse degree based on the relationship, the calculation module outputs a compression depth control signal to control the compression module to reduce the compression depth.

Preferably, the blood oxygen saturation interval varies based on patient classification.

A cardiopulmonary resuscitation method provided with a compression module capable of performing an automatic compression action to a patient, a compression action capable of being controlled and adjusted, a ventilation module capable of ventilating to the patient, and ventilation capable of being controlled and adjusted, the method comprising: monitoring a patient chest height signal; monitoring an original pulse signal of a patient; monitoring a patient blood oxygen saturation signal; at least one operating parameter of the compression module and/or ventilation module is adjusted in a manner that is related to the patient chest height signal, the raw pulse signal, and the blood oxygen saturation signal while the patient is placed under the compression module to receive cardiopulmonary resuscitation.

The scheme has the advantages that:

1. the ventilation is controlled in real time by monitoring the changes of the chest height signal and the blood oxygen concentration signal of the patient so as to avoid the occurrence of excessive ventilation; and according to the different chest collapse degrees of the patient, the patient is ventilated with different ventilation amounts, so that the exhalation and inhalation processes of the human body are better simulated, and the effect of cardiopulmonary resuscitation and ventilation is ensured.

2. According to the real-time chest height of the patient, the compression depth is adaptively adjusted so as to achieve a better chest compression effect and avoid fracture of the sternum of the patient caused by over-deep compression depth.

3. By real-time monitoring and analysis of the pulse and blood oxygen signals of a patient, real-time judgment is made on whether the patient recovers the spontaneous circulation (ROSC), and the compression depth is changed or cardiopulmonary resuscitation is stopped according to the pulse and the blood oxygen values. The method has the advantages that the patient is prevented from being continuously subjected to cardiopulmonary resuscitation after the patient has recovered the spontaneous circulation, so that the heart of the patient is excessively pressed, the coronary blood flow is reduced, and myocardial ischemia and even necrosis are caused; or to normal heart rhythms and even cardiac arrest, resulting in cardiopulmonary resuscitation failure.

4. The mechanical pressing device replaces manual pressing, can ensure the accuracy of pressing depth, force and frequency, and improves the resuscitation efficiency.

5. The device uses the machinery to replace manual pressing, reduces the fatigue degree of pressing personnel, avoids the situation that the pressing personnel cannot achieve the pressing effect due to fatigue or frequently exchanges pressing and ventilation personnel in the resuscitation process, and reduces the rescue burden of rescue personnel.

Drawings

Fig. 1 is a schematic diagram of control logic of a device according to the present invention.

Reference numerals:

100: a pressing module; 101: a pushing unit; 200: a chest height sensing module;

300: a pulse sensing module; 400: a blood oxygen sensing module; 500: a computing module;

600: a ventilation module; 700: and an indication module.

Detailed Description

The following detailed description refers to the accompanying drawings.

The principle of cardiopulmonary resuscitation is to make the heart generate air flow by external force to maintain the normal operation of the basic circulatory system in the body. When cardiopulmonary resuscitation is performed, the rescuer will perform chest compressions to the patient's heart with sufficient pressure to force the blood in the heart out. When the chest pressure is released, the patient can inhale fresh oxygen, and the lung can expand along with the airflow to promote oxygen inhalation. Chest compressions are one method of operation by compressing the chest and heart, squeezing the heart, and creating an airflow.

However, even for professionals, the frequency and depth of chest compressions is difficult to achieve a constant, efficient ideal compression standard. This is because chest compressions require a certain skill and the physical structure and state of each person are different, so that it is difficult to perform accurate operation. If the compression stroke is too shallow, an effective compression effect cannot be achieved, and if the compression stroke is too deep, excessive collapse of the chest of the patient may be caused, even fracture of the sternum of the patient may be caused, and secondary injury is caused to the patient. There are therefore proposals to use mechanical assistance instead of manually performing cardiopulmonary resuscitation, i.e. to use an automatic compression device to provide a relatively fixed pressure and frequency of compression to the patient. Mechanical actuation, unlike manual compression forms, is not physically limited and can provide relatively stable compression forces over long periods of time. Mechanical pressing still has some problems in that the pressing parameters cannot be adjusted relatively flexibly. Since cardiopulmonary resuscitation is not a constant procedure, there may be situations when adjusting the compression parameters based on different situations of the patient (as determined by physiological parameters) when performing cardiopulmonary resuscitation, and how to adjust the mechanical compression parameters relatively accurately is a problem to be solved.

In addition, how to timely judge the recovery of the patient from spontaneous circulation (Restoration of Spontaneous Circulation, ROSC) and stop chest compressions after the patient has recovered from spontaneous circulation is also one of the problems to be solved. If the patient has recovered the spontaneous circulation, the chest compression is continued, which will cause excessive compression to the heart of the patient, resulting in a decrease in coronary blood flow, resulting in myocardial ischemia and even necrosis; or to affect normal heart rhythms and even cause cardiac arrest.

Based on the above, the present solution proposes a cardiopulmonary resuscitation device comprising a compression module 100 for applying an actuation of prescribed operating parameters to a patient to achieve an externally supplied life support process, assisting the patient's cardiopulmonary autonomy in restoring a stable function. The pressing module 100 can be controlled by the computing module 500 to change at least one operating parameter thereof. The apparatus further comprises a chest height sensing module 200 for detecting a height signal of the patient's chest. A pulse sensing module 300 capable of detecting and transmitting a pulse signal of a patient. Blood oxygen sensing module 400 capable of detecting and transmitting a blood oxygen saturation signal of a patient. The calculation module 500 is communicatively connected to the chest height sensing module 200, the pulse sensing module 300, the blood oxygen sensing module 400 and the compression module 100 to obtain chest height, pulse signals and blood oxygen saturation signals, and regulate at least one operating parameter of the compression module 100 based on a calculation process.

The compression module 100 comprises at least one pushing unit 101 capable of generating a pressure actuation to the patient. Basically, the pushing unit 101 may be implemented by a telescopic structure, for example, a telescopic rod, a hydraulic rod, or the like may be adopted. Preferably, the pushing unit 101 is capable of being controllably driven to generate a pressure actuation to the patient, e.g. selecting a telescopic rod that can be driven, a telescopic structure driven by a motor, etc. The compression module 100 may further comprise a support unit for surrounding the patient's limb to restrain the patient's body, the support unit being further capable of determining the pushing unit 101 position by the patient's body definition. Basically, the support unit needs to meet the requirement of stable outward actuation of the pushing unit 101. On the other hand, the support unit can clamp a patient lying in the support unit in a two-sided cladding manner. And, based on the standard procedure and specification of cardiopulmonary resuscitation, the pushing unit 101 is disposed at a central portion of the supporting unit away from the ground so that the position thereof can correspond to the chest position of the patient. In the case of applying pressure to a patient by means of the device, the support unit is placed on both sides of the patient lying on his/her back, and the support unit is operated to contact and clamp both sides of the patient, and the pushing unit 101 located at the center portion of the support unit away from the ground is approximately located at a position corresponding to the chest portion of the patient. By means of the fine adjustment structure provided at the junction of the pushing unit 101 and the support unit, the pushing unit 101 can be accurately adjusted to the position corresponding to the chest of the patient. Subsequently, the pushing unit 101 is controlled to generate an actuation motion to the chest of the patient, and the chest of the patient is continuously driven by the pushing unit 101 to deform towards the concave direction after contacting with the pushing unit 101. When the pushing unit 101 is pressed down to a preset depth, one pressing process ends. The pushing unit 101 is then moved upwards in the opposite direction and the chest expands back and a relaxation process ends when the pushing unit 101 is in a critical position contacting the chest of the patient or away from the chest.

Preferably, the pushing unit 101 is detachably provided on the supporting unit so that it can be detached and replaced. In some embodiments, it can be replaced with a hand-like element made of a skin-friendly material, which makes the patient feel more comfortable and reduces the fear psychology of the patient. The scheme is particularly suitable for neonatal cardiopulmonary resuscitation, can simulate pressing by a person, and reduces fear of neonates to equipment. Preferably, the portion of the pushing unit 101 contacting the body surface of the patient is provided with a heating element so that the contact portion can be heated to a temperature range suitable for the human body, thereby making the patient more comfortable.

The chest height sensing module 200 is configured to be able to acquire height change data of the patient's chest upon actuation of the pushing unit 101. In this case, the patient's chest height generally refers to the height of the patient's chest at the contact position with the pushing unit 101, and the change in height can reflect the degree to which the patient's chest is pressed. According to cardiopulmonary resuscitation guidelines, for example, the depth of compressions for adults typically needs to be 5-6cm, the depth of compressions needs to be tightly controlled, and either too shallow or too deep may cause negative effects, so acquisition of chest height is necessary. In this embodiment, the chest height sensing module 200 may collect the change information of the chest height by adopting infrared ranging, image recognition, patch sensing, and other manners. Alternatively, chest height information may be indirectly measured by detecting the displacement amount of the pushing unit 101. For example, the initial position of the pushing unit 101 is at the critical position contacting the patient, and then only the displacement of the pushing unit 101 needs to be measured, the variation of the chest height, that is, the chest collapse height, can be known equally.

The pulse sensing module 300 is configured to be able to collect a pulse signal of a patient, which is a pulse signal that can be collected by the pulse sensing module 300. The pulse sensing module 300 collects pulse signals related to the pulse and processes the pulse signals into pulse data. The collected signals are output in a manner that the frequency of the signals is related to time, and may be processed into a plurality of signals according to the source of the pulse signals. When external pressing is applied, a first pulse signal is generated, and the signal is formed by mechanical pressing; the patient can generate weak pulse in the weak heart beat recovery stage, the pulse signals are usually chaotic, irregular in frequency and nonuniform in amplitude, and the patient can be judged as a second pulse signal of arrhythmia; in the case of a patient who has established a basic voluntary pulse in the later stages of cardiopulmonary resuscitation, a third pulse signal, which is a regular pulse signal of the patient's voluntary pulse, will also occur.

The blood oxygen sensing module 400 is configured to be able to collect blood oxygen information of a patient. In this embodiment, an existing blood oxygen sensor may be selected as the blood oxygen sensor module 400 of this embodiment. In use of the present device, the blood oxygen sensor module 400 may be worn on the body of a patient, and further may be held against the fingers of the patient.

Preferably, in use of the present device, the patient is placed within the compression module 100 and the compression pushrod is aligned with the patient's chest portion, the compression module 100 being configured to perform a compression action in accordance with the control signal from the calculation module 500.

Preferably, the chest height sensing module 200 monitors the initial chest height (first chest height) of the patient before compression while the compression portion performs the compression action, and the calculation module 500 records the first chest height; after each compression action is performed, the chest height sensing module 200 transmits the real-time chest height (second chest height) of the patient to the computing module 500; the calculation module 500 calculates the chest collapse height according to the difference between the second chest height and the first chest height. When the chest collapse height is in a first range, which may be greater than 5cm, for example, the calculation module 500 controls the ventilation module 600 to deliver a first gas delivery having a greater ventilation to accommodate the person's inspiratory state; when the chest collapse height is in a second range, which may be around 0, for example, the calculation module 500 controls the ventilation module 600 to deliver a second delivery of gas with a smaller ventilation to accommodate the person's exhalation state.

Preferably, there is a further setting of the first gas delivery quantity. That is, the first gas delivery rate is adjusted based on the blood oxygen saturation interval of different patients according to different patient types. Further, a plurality of blood oxygen saturation intervals may be preset in the calculation module 500, or a plurality of blood oxygen saturation intervals may be set in the database. The plurality of blood oxygen saturation intervals are different according to the difference of the patient type. In detail, the normal blood oxygen saturation range of adults is above 95%; the normal blood oxygen saturation range for elderly people may be slightly lower than for adults, approximately between 92% -95%; the normal blood oxygen saturation range of teenagers and children is similar to that of adults and is above 95%; the normoxic saturation range of newborns is typically between 93% -100%, but on the first post-natal day normoxic saturation may be slightly below this range; the normoxic range of infants is generally similar to that of newborns, approximately between 95% and 100%. Therefore, the calculation module 500 can determine the corresponding blood oxygen saturation interval based on the preset data according to the determined different patient types currently requiring cardiopulmonary resuscitation. The computing module 500 may obtain the patient type by an identification code entered by the operator for the patient currently in need of cardiopulmonary resuscitation. Preferably, in the emergency situation of cardiopulmonary resuscitation, the modes of manual operation reduction and high recognition speed can be used, such as code scanning, face recognition and the like, so as to save rescue time and personnel energy.

Further, after determining the corresponding blood oxygen saturation interval based on the current patient type, the calculation module 500 can dynamically determine a specific value of the first gas delivery amount based on the patient blood oxygen saturation signal transmitted by the blood oxygen detection module worn on the patient, if the blood oxygen saturation signal is determined to be in a relative relationship with the corresponding blood oxygen saturation interval. Preferably, when the blood oxygen saturation signal is smaller than the lower limit of the corresponding blood oxygen saturation interval, the first gas delivery amount is adjusted to be the first horizontal gas delivery amount; and when the blood oxygen saturation signal is higher than the lower limit of the corresponding blood oxygen saturation interval, determining an adjustment mode of increasing and/or decreasing the first gas conveying amount in the second horizontal gas conveying amount based on the change trend prediction of the blood oxygen saturation signal, wherein the first horizontal gas conveying amount is larger than the second horizontal gas conveying amount. Preferably, the first level of gas delivery is a relatively high gas delivery corresponding to a low blood oxygen saturation signal of the patient, where a high oxygen delivery is required to meet the patient's sufficient oxygen demand, which may be 60ml each time, for example. The second horizontal gas delivery amount may be more extensive than the first horizontal gas delivery amount, because in this embodiment the second horizontal gas delivery amount can be adjusted within its range by a specific amount. For example, the second horizontal gas delivery amount is configured to be in the range of 30 to 50ml each time, and may be selected from the above ranges, as long as the corresponding gas delivery amount is specifically given. Preferably, the above selection is performed based on a trend prediction of the blood oxygen saturation signal, and based on a trend analysis of the blood oxygen saturation signal at the current time point or for a predetermined period of time preceding the current time point, it is possible to know whether the current blood oxygen saturation signal is a trend of increasing or decreasing direction. The analysis method can be to process the data into a curve, then obtain the derivative in a derivative way and judge the increase and decrease according to the value of the derivative. Further, in the case where the current blood oxygen saturation signal is a trend of changing in the increasing direction, the second horizontal gas delivery amount is changed in such a manner that the ventilation amount gradually decreases with the number of presses within its range. For example, selecting a range of 40-30ml each time, gradually decreasing with each press, thereby decreasing to 30ml each time or to an approximate value; similarly, in the case where the current blood oxygen saturation signal is a trend toward a decreasing direction, the second horizontal gas delivery amount is changed in such a manner that the ventilation amount increases with the number of presses within its range. For example, the range of 40 to 50ml is selected, and the pressure is gradually increased to 50ml with each press, and the first level gas delivery amount is switched to when the blood oxygen saturation signal is lower than the lower limit of the blood oxygen saturation range. The above scheme realizes that the dynamically adjusted gas amount or oxygen amount is given along with the pressing times based on the blood oxygen condition of the patient in the cardiopulmonary resuscitation process. The present solution notes that for patients suffering from cardiac or respiratory arrest, when they are supplemented with oxygen, the patient is able to partially resume the function of spontaneous inhalation of oxygen during the recovery process, due to the recovery process of his body function during the cardiopulmonary resuscitation phase. In the prior art, partial functions of autonomous recovery of a patient are not considered, and oxygen is given to the patient in a fixed manner, or a random artificial respiratory oxygen amount is given when cardiopulmonary resuscitation is manually performed, which may cause problems such as insufficient oxygen amount provided to the patient in early stages of cardiopulmonary resuscitation, failure to provide continuous and relatively stable oxygen amount supply to the patient in middle stages of cardiopulmonary resuscitation, failure to dynamically reduce partial additional oxygen supply based on the functional recovery of the patient in later stages of cardiopulmonary resuscitation, and the like. The scheme can automatically subdivide the cardiopulmonary resuscitation process based on the physical function recovery condition of the patient under the condition of saving manual attention, and automatically adjust the oxygen amount provided for the patient according to different conditions, so that the patient can be ensured to receive the most adaptive oxygen flux in the cardiopulmonary resuscitation process.

Preferably, the chest height sensing module 200 monitors the patient chest height and transmits a patient chest height signal to the computing module 500. The calculation module 500 outputs a corresponding compression depth control signal according to the chest height signal of the patient and compares the chest collapse degree-compression frequency relation curve with a pre-built-in chest collapse degree-compression frequency relation curve, and the compression module 100 determines the compression depth according to the compression depth control signal and performs a corresponding compression action.

During chest compressions, the patient's chest gradually collapses as the number of compressions increases. At a certain number of compressions, a certain degree of collapse is acceptable, so that multiple "chest collapse height-number of compressions" functional curves for different types of patients (adults, women, elderly, children, newborns, etc.) can be made to control the extent of chest collapse during the actual compression of the patient.

And comparing the calculated chest collapse height with a preset functional relation curve of the chest collapse height-pressing times, and outputting a corresponding pressing depth control signal according to the comparison result.

If the chest collapse height is greater than the expected chest collapse level, the next compression depth reduction is controlled. For example, the degree of compression depth reduction may be controlled according to the degree to which the chest collapse height is greater than the expected chest collapse height: the chest collapse height is 1.1 times the expected chest collapse height, then the next compression depth controlled by the next compression depth control signal is 0.9 times the previous compression depth.

If the chest collapse height exceeds the chest collapse alert value, which indicates that the patient's sternum is about to fracture, which needs to be avoided as much as possible during chest compressions, the calculation module 500 controls the reduction in the compression depth value characterized by the next compression depth control signal at a greater rate of change. If the chest collapse height is less than or equal to the expected chest collapse level, the control compression depth is unchanged, i.e. the compression depth value characterized by the next compression depth control signal is equal to the last time.

Different compression depths and compression depth reduction levels are set according to different patient types. For example, elderly and women are resistant to chest compressions to different degrees.

Further, the cardiopulmonary resuscitation device further comprises an indication module 700 for visually displaying chest height signals etc. of the patient.

The indication module 700 is also configured to receive instructions from the calculation module 500 to issue speech to the rescuer.

If the chest collapse height exceeds the chest collapse warning value, the patient's sternum is indicated to be fractured immediately, the calculation module 500 sends an instruction to the indication module 700, and the indication module 700 sends warning voice to the rescuer, for example, please pay attention to, the patient's chest collapse is close to the warning value, the rescuer is reminded to pay attention to the patient, and secondary injuries such as sternal fracture and the like of the patient are avoided.

Preferably, the pulse sensing module 300 monitors the pulse signal of the patient in real time, and transmits the original pulse signal to the calculating module 500, and the calculating module 500 analyzes the original pulse signal to decompose the original pulse signal into three pulse signals: a first pulse signal representing the pressure of the device, a second pulse signal representing the patient's voluntary generation of an arrhythmia pulse, and a third pulse signal representing the patient's voluntary generation of a stable pulse.

The calculation module 500 compares the first pulse signal, the second pulse signal and the third pulse signal with preset pulse feature functions, and determines the pulse state of the patient according to the comparison result. For example, only the first pulse signal, representing that the received pulse signal is entirely generated by the device compression, the patient himself does not generate an autonomous pulse; if the first pulse signal and the second pulse signal exist at the same time, the patient is shown to generate a certain autonomous pulse, but the pulse is still irregular; if there is both the first pulse signal and the third pulse signal, it is indicated that the patient has had an autonomous, steady pulse generation.

When the time of the third pulse signal reaches the preset autonomous pulse duration, the calculation module 500 determines whether the patient recovers the autonomous circulation according to the blood oxygen saturation condition of the patient, and stops the chest compression after the patient recovers the autonomous circulation.

If the blood oxygen saturation of the patient falls into the preset blood oxygen saturation interval, the patient is indicated to generate autonomous and stable pulse, and the pulse enables the blood oxygen saturation to be recovered to be normal, the patient is regarded as having recovered to autonomous circulation (ROSC), and the calculating unit sends a stop instruction to the pressing element.

It should be noted that, while the computing element determines whether the patient's blood oxygen saturation falls within the preset blood oxygen saturation interval, the third pulse signal must also be in a stable generation stage, otherwise, it cannot be said that the recovery of the patient's blood oxygen saturation is brought about by the patient's autonomous stable pulse, but may also be brought about by the pulse generated by the device compression. If the patient is considered to have recovered the spontaneous circulation to be inaccurate only by the blood oxygen saturation falling into the preset blood oxygen saturation interval, misjudgment may be caused, so that the chest compression is stopped when the patient has not yet achieved the recovery of the spontaneous circulation, the effect of cardiopulmonary resuscitation cannot be achieved, and even rescue failure is caused. Preferably, a preferred embodiment is also presented, wherein during the performance of automated cardiopulmonary resuscitation of a patient, the compression module 100 is configured to perform a depressing and lifting action of the compression at a first frequency, and the ventilation module 600 is configured to provide oxygen of alternating concentration parameters to the patient at a second frequency, wherein the first frequency and the second frequency have a time difference at respective execution nodes, the time difference being adjusted based on at least one detected physiological parameter of the patient. Preferably, the physiological parameter is selected as a pulse signal of the patient. The execution node refers to a time point when the pressing module 100 or the ventilation module 600 performs one action according to its own set frequency, for example, refers to a time point when the pressing module 100 performs a pressing action or a lifting action; the reference to the ventilation module 600 refers to the point in time at which delivery of one concentration parameter is performed. The alternating concentration parameter refers to the ability of the ventilation module 600 to deliver a switching concentration of oxygen to the patient. The heart-lung resuscitation process is essentially to manually apply external force to simulate the pumping function of human heart and lung, so that artificial circulation is realized in a patient for a period of time, the blood supply of essential organs such as heart and brain is met, and the patient is promoted to recover self circulation. In the process, the breathing process of a human body needs to be simulated, the breathing of the human body is divided into two stages of breathing and inhaling, the stages are different, the chest forms are different, and the stages of external pressing are also different. Based on the simulated human breath, the two phases have different recommended oxygen concentrations, and in general, the simulated inhalation process has a higher oxygen concentration. Thus, in this embodiment, at least two concentration-switchable ventilation modules 600 are selectively configured so that they can alternately provide different concentrations of oxygen to the patient at a second frequency to adapt to the two phases of patient breathing, ensuring that the patient can resume spontaneous circulation as soon as possible in a better vitamin gas environment. The present solution finds that there is a certain time difference between the deformation process of external compression to simulate the thoracic breathing deformation and the actual breathing cycle of the human body, mainly due to the delayed high level absorption phase of the oxygenation process affected by the conversion mechanism of the heart lung function, and this difference is related to the degree of spontaneous recovery of the patient during cardiopulmonary resuscitation. In the case of a gradual recovery of the heart-lung function and a gradual establishment of the spontaneous circulation of the patient, the heart and lung can participate more rapidly in the oxygen transformation process, so that a suitable shortening of the time difference occurs to meet the rapid and sufficient oxygen demand of the patient. Conversely, as the patient's heart-lung function progresses toward stasis, a suitable extension of the time difference is also required to ensure that the lungs in the corresponding state are able to absorb sufficient amounts of oxygen with external assistance in simulating breathing. In this embodiment, the patient pulse parameter is selected as the reference parameter for determining the time difference. One possible way is to pre-establish a relationship of patient pulse to time difference, which may be a table. More preferably, different relationships may be determined for the patient type. The pulse parameters of the patient are chosen on the one hand because the pulse can quite intuitively reflect the extent to which the patient himself participates in breathing. The heart and lung of the patient participate in respiratory action, namely, certain physiological feedback can be generated on pulse, and the condition that the heart and lung function of the patient recovers autonomous pulsation can be obtained through detecting the pulse frequency, so that the set value of the time difference can be timely adjusted. On the other hand, the pulse parameters can exclude similar heart beat parameters caused by external compression, so that the processed data is not disturbed, and the time difference can be accurately adjusted. Based on the above, the pulse detection can detect a plurality of wave data simultaneously, one of which is a pulse wave caused by external compression and one of which is a pulse wave generated by the patient's own spontaneous circulation. The pulse wave generated by the external compression can be rapidly eliminated in the computing module 500 by comparing with the first frequency currently set by the compression module 100 (because the pulse wave data generated by the compression module 100 set by the first frequency has a strong correlation with the first frequency, so that the pulse wave data can be rapidly distinguished from the waveform), and the rest pulse wave data can be more rapidly integrated and analyzed to form data capable of accurately reflecting the autonomous circulation of the patient. According to the scheme, irrelevant pulse wave data can be rapidly eliminated, and pulse wave signals of the autonomous circulation of a patient can be rapidly distinguished, so that the set value of the time difference can be further accurately determined according to the pulse wave signals of the autonomous circulation of the patient.

Preferably, there is also provided a cardiopulmonary resuscitation method configured with a compression module 100 capable of performing an automatic compression action to a patient, the compression action being controllable and adjustable; also configured with a ventilation module 600 capable of ventilating a patient, the ventilation being controllably adjustable, the method comprising: monitoring a patient chest height signal; monitoring an original pulse signal of a patient; monitoring a patient blood oxygen saturation signal; when the patient is placed under compression module 100 to receive cardiopulmonary resuscitation, at least one operating parameter of compression module 100 and/or ventilation module 600 is adjusted in a manner that is related to the patient's chest height signal, the raw pulse signal, and the blood oxygen saturation signal. The method is largely the same as the foregoing apparatus, and additionally, the subject performing the relevant functions in the method may be various types of devices or persons, and the embodiment is not limited thereto.

It should be noted that the above-described embodiments are exemplary, and that a person skilled in the art, in light of the present disclosure, may devise various solutions that fall within the scope of the present disclosure and fall within the scope of the present disclosure. It should be understood by those skilled in the art that the present description and drawings are illustrative and not limiting to the claims. The scope of the invention is defined by the claims and their equivalents. The description of the invention encompasses multiple inventive concepts, such as "preferably," "according to a preferred embodiment," or "optionally," all means that the corresponding paragraph discloses a separate concept, and that the applicant reserves the right to filed a divisional application according to each inventive concept. Throughout this document, the word "preferably" is used in a generic sense to mean only one alternative, and not to be construed as necessarily required, so that the applicant reserves the right to forego or delete the relevant preferred feature at any time.

Claims

1. A cardiopulmonary resuscitation device, comprising a first device,

a compression module (100) for compressing the chest of the patient, configured to perform a compression action according to a control signal from the calculation module (500);

a chest height sensing module (200) configured to monitor and transmit patient chest height signals;

a pulse sensing module (300) configured to monitor and transmit a patient raw pulse signal;

an blood oxygen sensing module (400) configured to monitor and transmit a patient blood oxygen saturation signal;

a ventilation module (600) configured to deliver respiratory gas to an airway of a patient;

it is characterized in that the method comprises the steps of,

the computing module (500) receives the patient chest height signal, the raw pulse signal and the blood oxygen saturation signal, wherein the computing module (500) adjusts at least one operating parameter of the compression module (100) and/or the ventilation module (600) in a manner that is associated with the patient chest height signal, the raw pulse signal and the blood oxygen saturation signal when the patient is placed under the compression module (100) to receive cardiopulmonary resuscitation.

2. The apparatus of claim 1, wherein in the case where the chest height sensing module (200) detects two chest heights of the patient's chest when the compression module (100) is depressed and lifted and transmits to the calculation module (500), the calculation module (500) is capable of determining the patient's chest collapse height based on a difference between the two chest heights, and then, when the chest collapse height is in a first range, the calculation module (500) controls the ventilation module (600) to deliver oxygen to the patient at a first gas delivery amount.

3. The device of any of the preceding claims, wherein the calculation module (500) controls the ventilation module (600) to deliver oxygen to the patient at a second gas delivery amount when the chest collapse height is in a second range, wherein the first range is greater in value than the second range and the second gas delivery amount is less in value than the first gas delivery amount.

4. The apparatus according to any of the preceding claims, wherein the calculation module (500) is configured to adjust the value of the first gas delivery amount given by the ventilation module (600) in case it is determined that the patient's blood oxygen saturation signal is located in its corresponding blood oxygen saturation interval, wherein the first gas delivery amount is configured as a first horizontal gas delivery amount when the blood oxygen saturation signal is below the lower limit of the blood oxygen saturation interval, and the first gas delivery amount is configured as a second horizontal gas delivery amount when the blood oxygen saturation signal is above the lower limit of the blood oxygen saturation interval, the first horizontal gas delivery amount being larger than the second horizontal gas delivery amount.

5. The apparatus according to any of the preceding claims, wherein the calculation module (500) determines the way in which the first gas delivery amount is adjusted to increase and/or decrease within the second horizontal gas delivery amount based on a trend prediction of the blood oxygen saturation when the blood oxygen saturation signal is higher than a lower limit of the corresponding blood oxygen saturation interval.

6. The apparatus according to any of the preceding claims, wherein the first gas delivery amount varies in such a way that the ventilation gradually decreases with the number of presses within the second horizontal gas delivery amount in a trend of the current blood oxygen saturation signal varying in the increasing direction.

7. The apparatus according to any one of the preceding claims, wherein the first gas delivery amount is changed in such a manner that the ventilation amount increases with the number of presses within the second horizontal gas delivery amount in a trend that the current blood oxygen saturation signal is changed in the decreasing direction, and the first gas delivery amount is switched to the first horizontal gas delivery amount when the blood oxygen saturation signal is lower than the lower limit of the blood oxygen saturation section.

8. The apparatus according to any of the preceding claims, wherein the calculation module (500) outputs a compression depth control signal based on a comparison of the patient chest height signal with a preset "chest collapse degree-compression number" relationship, and the compression module (100) determines the compression depth according to the compression depth control signal and performs a corresponding compression action.

9. The apparatus according to any of the preceding claims, wherein the calculation module (500) outputs a compression depth control signal to control the compression module (100) to reduce compression depth in case the chest collapse height is greater than an expected chest collapse level based on a relation.

10. Cardiopulmonary resuscitation method configured with

A compression module (100) capable of performing an automatic compression action to a patient, said compression action being controllable and adjustable,

a ventilation module (600) capable of ventilating a patient, the ventilation being controllably adjustable,

the method is characterized by comprising the following steps:

monitoring a patient chest height signal;

monitoring an original pulse signal of a patient;

monitoring a patient blood oxygen saturation signal;

at least one operating parameter of the compression module (100) and/or ventilation module (600) is adjusted in a manner that is associated with the patient chest height signal, the raw pulse signal, and the blood oxygen saturation signal when the patient is placed under the compression module (100) to receive cardiopulmonary resuscitation.