Intelligent emergency rescue breathing assistance system and driving method thereof

Abstract

This invention relates to an intelligent emergency respiratory support system and its driving method. The system includes: a first acquisition unit for collecting hemodynamic characteristic information of a patient; a second acquisition unit for collecting respiratory characteristic information of the patient during the time period of collecting hemodynamic characteristic information; an oxygen supply unit for providing oxygen to the patient based on the patient's hemodynamic and respiratory characteristic information; and a processor, which is signal-connected to the first acquisition unit, the second acquisition unit, and the oxygen supply unit. Based on the hemodynamic characteristic information, the processor obtains blood oxygen saturation, reflecting the degree of oxygen binding to hemoglobin in the patient's arterial blood, and blood flow velocity, reflecting the speed of blood flow in the patient's blood vessels. Simultaneously, based on the respiratory characteristic information, the processor obtains the patient's respiratory rate, and controls the oxygen supply unit to change the oxygen supply mode provided to the patient. This invention can solve the problem that existing technologies cannot effectively improve emergency rescue efficiency because they ignore the patient's actual oxygen consumption characteristics.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, and in particular to an intelligent emergency respiratory assistance system and method. Background Technology

[0002] Oxygen is essential for maintaining human metabolism. Oxygen deficiency in human tissues is a significant cause of many diseases, leading to serious consequences and even death. Blood oxygen saturation is a crucial parameter reflecting tissue oxygen supply and has significant value in clinical treatment. The brain, as the body's higher center, controls and regulates all bodily functions. Brain metabolism is aerobic, and brain oxygenation depends on oxygen supply balance. The brain has a high metabolic rate, consuming 20% ​​of the body's total oxygen. While the brain consumes a large amount of oxygen, its metabolic compensatory reserves are low, making it highly sensitive to oxygen deficiency. Even short-term oxygen deprivation can cause irreversible damage to the central nervous system.

[0003] Brain protection is crucial in critical care and in the treatment of brain resuscitation after cardiac arrest. The brain is one of the most sensitive organs to hypoxia, reoxygenation, and oxidative stress. Its metabolic oxygen demand is extremely high, making it highly susceptible to hypoxia-induced damage. Insufficient ventilation can lead to end-organ damage and cardiac arrest. To prevent severe complications caused by hypoxia, especially in cases of asphyxia, respiratory distress, or other situations requiring increased oxygen supply, medical personnel use emergency resuscitation bags to provide oxygen, maintaining ventilation for a short period and minimizing irreversible damage from hypoxia.

[0004] When medical staff use a breathing bag to provide oxygen to a patient, due to differences in their practical experience, those with insufficient experience may not be able to adjust the compression frequency of the breathing bag according to the patient's condition. In emergency situations, they may compress too quickly or too slowly, resulting in the actual amount of oxygen provided to the patient exceeding or falling below the patient's required oxygen level. On the other hand, while existing technologies provide automated compression cuffs that can replace manual compression for oxygen supply—for example, Chinese invention patent application CN111494764A discloses a compression device for a breathing cuff—it includes a cylindrical seat for housing the breathing cuff and multiple sets of compression manipulators radially distributed along the inner wall of the cylindrical seat, positioned close to or away from the breathing cuff. Each compression manipulator includes a compression plate for conforming to the outer wall of the breathing cuff, a drive assembly vertically connected to the compression plate, and a suction cup assembly passing through the compression plate to adsorb and connect to the outer wall of the breathing cuff. The drive assembly is used to drive the compression plate closer to the axis of the cylindrical seat to expel oxygen from the breathing cuff, and also to drive the compression plate away from the axis of the cylindrical seat to draw external oxygen into the breathing cuff. Although the above-mentioned technical solutions can solve the problem of insufficient tidal volume during manual compression of breathing cuffs in the transport of critically ill patients, this approach does not address the issue of inadequate tidal volume during transport. However, the automatic compression cuff has a fixed compression frequency (e.g., 16-20 times / min, delivering 400-600ml of gas each time), and cannot automatically adjust the oxygen supply strategy according to the patient's actual needs.

[0005] In practice, medical staff typically provide oxygen to patients using established oxygen delivery patterns. However, due to differences in patients' conditions and individual circumstances, medical staff may overlook the patient's actual oxygen consumption capacity—that is, the relationship between the body's oxygen supply and demand. During resuscitation, medical staff often rely on past experience to provide oxygen, failing to adjust the delivery strategy based on the patient's actual oxygen usage or recovery status. In emergency situations, medical staff often depend on past experience to determine oxygen delivery plans. Because the oxygen delivery pattern is not adjusted to the patient's individual needs and changes in condition, problems such as insufficient ventilation, excessive ventilation, respiratory obstruction, and ventilation rates that are too fast or too slow may occur, thus failing to effectively improve emergency response efficiency.

[0006] Furthermore, on the one hand, there are differences in understanding among those skilled in the art; on the other hand, the applicant studied a large number of documents and patents when making this invention, but due to space limitations, not all details and contents were listed in detail. However, this does not mean that the present invention does not possess the features of these prior art. On the contrary, the present invention already possesses all the features of the prior art, and the applicant reserves the right to add relevant prior art to the background art. Summary of the Invention

[0007] To address the shortcomings of existing technologies, this invention provides an intelligent emergency respiratory support system, comprising:

[0008] The first acquisition unit used to collect hemodynamic characteristic information of patients;

[0009] The second acquisition unit used to acquire the patient's respiratory characteristics during the time period of acquiring hemodynamic characteristic information;

[0010] An oxygen supply unit for providing oxygen to a patient based on the patient's hemodynamic and respiratory characteristics; and a processor, the processor being signal-connected to the first acquisition unit, the second acquisition unit, and the oxygen supply unit, respectively.

[0011] Based on blood oxygen saturation, which reflects the degree of oxygen binding with hemoglobin in the patient's arterial blood, and blood flow velocity, which reflects the speed of blood flow in the patient's blood vessels, obtained through hemodynamic characteristics, and simultaneously based on the patient's respiratory rate obtained through respiratory characteristics, the processor controls the oxygen supply unit to change the oxygen supply mode provided to the patient.

[0012] The technical benefits of this solution are as follows: In non-hospital environments (such as homes, shopping malls, streets, etc.), if someone experiences a sudden emergency such as difficulty breathing or shock, medical personnel can provide on-site first aid. Typically, oxygen needs to be supplied to patients experiencing such emergencies to maintain their oxygen concentration. However, in existing technologies, when hospital personnel provide oxygen to patients, they usually select the compression frequency of the breathing bag based on their own experience; or, when using an emergency ventilator, they select the theoretically appropriate oxygen flow rate after monitoring the patient's blood oxygen saturation.

[0013] While blood oxygen saturation can serve as a basis for determining the flow rate of oxygen supplied—for example, current technologies typically use blood oxygen saturation to classify patients as mild, moderate, or severe hypoxia—in reality, when a patient is hypoxic, if their breathing is restricted or their blood circulation is slow, even providing a high flow rate of oxygen will have limited effect and may even hinder breathing. Therefore, current technologies cannot provide precise oxygen supply modes tailored to individual patient differences and their specific oxygen consumption characteristics. An unsuitable oxygen supply mode not only wastes resources but may also affect or even impede the patient's breathing, worsening their condition. Oxygen resources in the ICU are also limited. For example, when using centralized oxygen supply, the total oxygen supply is determined based on the number of beds. This invention's individualized oxygen supply provides more precise numerical indicators for temporarily adding beds, offering more opportunities for emergency treatment. For instance, in situations using oxygen cylinders, the ability to individually determine the oxygen supply volume allows for advance prediction of cylinder usage, reducing the frequency of cylinder replacements and providing more opportunities for life-saving interventions.

[0014] This protocol determines the degree of hypoxia based on blood oxygen saturation, analyzes airflow limitation based on respiratory rate, and further analyzes oxygen flow within the body using blood flow velocity. Each patient's condition is different; factors such as cardiopulmonary function, vascular resistance, blood viscosity, and body posture all affect blood flow velocity. Breathed oxygen enters the bloodstream and, through circulation, reaches various organs and tissues to provide the necessary oxygen for normal life functions. When a patient's blood oxygen saturation is below normal, indicating hypoxia (e.g., 89%), past experience has led healthcare professionals to provide low-flow continuous oxygen therapy. However, when airflow is limited, such as with a respiratory rate below normal, continuous oxygen therapy may hinder exhalation; or when blood flow is abnormal, such as exceeding normal limits, rapid blood flow indicates that inhaled oxygen reaches other parts of the body more quickly. In such cases, low-flow oxygen therapy may not meet the actual oxygen consumption rate, hindering rapid recovery from hypoxia.

[0015] This technical solution uses blood oxygen saturation, respiratory rate, and blood flow velocity as references for selecting the oxygen supply mode. It takes into account the balance between oxygen supply and the patient's actual oxygen consumption, ensuring timely improvement of the patient's hypoxia while matching the oxygen supply mode with the patient's oxygen consumption. This saves medical resources and ensures that the supplied oxygen plays an effective role.

[0016] According to a preferred embodiment, the processor is configured to: control the oxygen supply unit to provide oxygen to the patient in a first oxygen flow rate and intermittent oxygen supply mode when the patient's blood oxygen saturation is between a first threshold and a second threshold reflecting mild hypoxia, the patient's respiratory rate is lower than the lower limit of a preset respiratory rate range, and the patient's blood flow velocity is lower than the lower limit of a preset flow velocity range.

[0017] The beneficial effects of this technical solution are as follows: The severity of hypoxia varies, leading to different hypoxic states in different organs and tissues of the body. Due to the existence of a blood flow redistribution regulation mechanism, when hypoxia occurs, the body prioritizes protecting the brain and heart by ensuring adequate oxygen supply and blood flow, based on the importance of each organ or tissue in the body. When a patient is detected to be in a state of mild hypoxia, it indicates that other organs or tissues may be hypoxic, but the brain is not. Based on the results showing that the patient's respiratory rate is below the lower limit of a preset respiratory rate range and blood flow velocity is below the lower limit of a preset flow velocity range, an oxygen supply mode of initial oxygen flow rate and intermittent oxygen delivery is provided to the patient. The initial oxygen flow rate can be 1–2 L / min. A patient's blood oxygen saturation indicates mild hypoxia; a slower respiratory rate indicates a slower respiratory airflow velocity; and a slower blood flow velocity indicates a slower oxygen circulation within the body, slowing the rate at which oxygen reaches all parts of the body. Therefore, a low-flow (initial oxygen flow rate) and intermittent oxygen delivery mode is required. Low-flow, intermittent oxygen delivery reduces the resistance patients experience during breathing, allowing them to smoothly inhale external oxygen. Because blood flow is slow, even if the oxygen flow rate is increased, the body cannot effectively utilize the excess oxygen. Therefore, this plan selects a low-flow, intermittent oxygen delivery mode.

[0018] According to a preferred embodiment, intermittent oxygen administration refers to providing oxygen to a patient during the patient's exhalation or inhalation phases.

[0019] According to a preferred embodiment, intermittent oxygen administration refers to providing oxygen to the patient during the patient's inspiratory phase.

[0020] The beneficial effects of this technical solution are as follows: Since the patient's respiratory rate is lower than the lower limit of the respiratory rate range, it indicates that the patient's breathing airflow is slow and the airflow may be obstructed. If oxygen is supplied to the patient throughout the entire breathing phase, it may cause obstruction of airflow during the patient's exhalation phase. That is, when the patient exhales, external oxygen will enter the patient's respiratory tract (nasal cavity, oral cavity, etc.). The external oxygen that enters and the patient's exhaled air form a relative airflow, which may easily increase the patient's discomfort symptoms.

[0021] According to a preferred embodiment, the processor is configured to: control the oxygen supply unit to provide oxygen to the patient in a first oxygen flow rate and a continuous oxygen supply mode when the patient's blood oxygen saturation is between a first threshold and a second threshold reflecting mild hypoxia, the patient's respiratory rate is lower than the lower limit of a preset respiratory rate range, and the patient's blood flow velocity exceeds the upper limit of a preset flow velocity range.

[0022] The beneficial effects of this technical solution are as follows: When a patient is detected to be in a state of mild hypoxia, other organs or tissues may be hypoxic, but the brain may not be. Based on the results showing that the patient's respiratory rate is below the lower limit of a preset respiratory rate range and the blood flow velocity exceeds the upper limit of a preset flow rate range, a continuous oxygen supply mode with a first oxygen flow rate is provided to the patient. The patient's blood oxygen saturation results indicate mild hypoxia. The slowed respiratory rate indicates a slow airflow velocity, but the faster blood flow velocity indicates that the inhaled oxygen reaches different parts of the body more quickly. Therefore, a continuous oxygen supply mode with a low flow rate (first oxygen flow rate) is implemented. In a state of mild hypoxia, timely and effective oxygen supply can help the patient recover from hypoxia as quickly as possible. A respiratory rate below the lower limit of the preset respiratory rate range may be caused by hypoxia, or it may be caused by the patient's psychological factors, medication effects, or physiological factors. In particular, continuous oxygen supply maintains a specific oxygen concentration inside the breathing mask while the patient is inhaling oxygen, ensuring oxygen is still supplied during the patient's exhalation phase at a low flow rate (first oxygen flow). During oxygen supply, a balance needs to be struck between ensuring adequate oxygen supply and minimizing resistance. In this protocol, minimizing resistance during oxygen supply is prioritized over ensuring the patient quickly recovers from hypoxia. Once the patient is out of hypoxia, their respiratory rate may return to normal. On the other hand, if the patient has recovered from hypoxia but their respiratory rate remains abnormal, further examinations can be conducted to determine if the patient has other underlying conditions; this data can serve as a reference for the doctor's diagnosis.

[0023] According to a preferred embodiment, the processor is configured to: control the oxygen supply unit to provide oxygen to the patient in a second oxygen flow rate and intermittent oxygen supply mode when the patient's blood oxygen saturation is between a first threshold and a second threshold reflecting mild hypoxia, the patient's respiratory rate exceeds the upper limit of a preset respiratory rate range, and the patient's blood flow velocity is lower than the lower limit of a preset flow velocity range.

[0024] According to a preferred embodiment, the second oxygen flow rate is greater than the first oxygen flow rate.

[0025] The beneficial effects of this technical solution are as follows: When a patient is detected to be in a state of mild hypoxia, there may be hypoxia in other organs or tissues, but the brain is not hypoxic. Based on the results showing that the patient's respiratory rate exceeds the upper limit of the preset respiratory rate range and the blood flow velocity is below the lower limit of the preset flow velocity range, a secondary oxygen flow rate and intermittent oxygen supply mode are provided to the patient. The patient's blood oxygen saturation indicates mild hypoxia, and the increased respiratory rate indicates a faster airflow velocity, meaning the frequency of inhalation and exhalation of gas is accelerated. Theoretically, to help the patient recover from hypoxia as quickly as possible, a continuous oxygen supply mode could be provided. However, the patient's blood flow velocity is relatively slow. After oxygen enters the bloodstream, its flow to the whole body is slow (oxygen reaches the whole body relatively slowly). Continuous oxygen supply may lead to oxygen accumulation in specific parts of the body, or the inhaled oxygen may be expelled before reaching its target site, resulting in a waste of oxygen resources. Therefore, this technical solution selects an intermittent oxygen supply mode at a medium flow rate (secondary oxygen flow rate). The second oxygen flow rate is greater than the first oxygen flow rate. During periods when oxygen supply is interrupted, the second oxygen flow rate can still maintain the oxygen concentration within the breathing mask. When the patient's respiratory rate is fast, the oxygen provided by the second oxygen flow rate is sufficient to match the patient's respiratory rate. The combination of the second oxygen flow rate and intermittent oxygen delivery ensures that the inhaled oxygen matches the blood flow rate. When using a breathing mask, the oxygen intermittently entering the mask at the second oxygen flow rate is not completely inhaled during the patient's inhalation; the remaining oxygen remains in the mask, ensuring a continuous supply of oxygen, even if the patient's respiratory rate is fast. The combination of the second oxygen flow rate and intermittent oxygen delivery ensures that the amount of inhaled oxygen matches the blood flow rate. Furthermore, this technical solution differs from the solution using the first oxygen flow rate and continuous oxygen delivery. In this solution, the patient's respiratory rate is fast, and continuous oxygen delivery might increase the degree of respiratory disturbance, meaning that the airflow generated by continuous oxygen delivery would continuously oppose the patient's exhaled air. Therefore, this protocol provides oxygen to patients using a second oxygen flow rate and intermittent oxygen delivery mode.

[0026] According to a preferred embodiment, the processor is configured to: control the oxygen supply unit to provide oxygen to the patient in a continuous oxygen supply mode with a second oxygen flow rate when the patient's blood oxygen saturation is between a first threshold and a second threshold reflecting mild hypoxia, the patient's respiratory rate exceeds the upper limit of a preset respiratory rate range, and the patient's blood flow velocity exceeds the upper limit of a preset flow velocity range.

[0027] The beneficial effects of this technical solution are as follows: In this situation, the patient is in a state of mild hypoxia. Because the patient's respiratory rate exceeds the upper limit of the preset respiratory rate range, and the patient's blood flow velocity exceeds the upper limit of the preset flow velocity range, oxygen can be provided to the patient using a second oxygen flow rate and a continuous oxygen supply mode. The second oxygen flow rate is greater than the first oxygen flow rate. Due to the patient's faster respiratory rate and blood flow velocity, the inhaled oxygen can quickly reach the patient's whole body, allowing the patient to escape the hypoxic state. Compared to the possibility of respiratory disturbances, this technical solution prioritizes ensuring that the patient can escape the hypoxic state as quickly as possible. Once the patient is out of the hypoxic state, their respiratory rate may also return to the normal range. If the respiratory rate cannot return to the normal range, medical staff can conduct further disease screening on the patient.

[0028] According to a preferred embodiment, the processor is configured to control the oxygen supply unit to provide oxygen to the patient in a continuous oxygen supply mode with a third oxygen flow rate when the patient's blood oxygen saturation is lower than a second threshold reflecting the patient's cerebral hypoxia.

[0029] According to a preferred embodiment, the second threshold is lower than the first threshold. According to a preferred embodiment, the third oxygen flow rate is greater than the second oxygen flow rate.

[0030] The beneficial effects of this technical solution are as follows: The second threshold in this solution is used to determine whether a patient is at risk of cerebral hypoxia. When a patient's blood oxygen saturation is lower than the second threshold, it indicates that the patient may be experiencing cerebral hypoxia. In this case, regardless of the patient's respiratory rate and blood flow velocity, ensuring the patient is out of hypoxia is the first priority rescue plan. Therefore, this solution uses a third oxygen flow rate (high flow rate) and continuous oxygen supply mode to provide oxygen to the patient. In particular, when using a breathing mask for oxygen supply, the third oxygen flow rate is greater than the second oxygen flow rate. The third oxygen flow rate and continuous oxygen supply can increase the oxygen pressure inside the breathing mask. When the oxygen pressure inside the breathing mask is high enough, external oxygen can enter the patient's airway as much as possible, alleviating the patient's symptoms of cerebral hypoxia and eliminating the danger of cerebral hypoxia in a timely manner.

[0031] Another aspect of this invention provides a driving method for an intelligent emergency respiratory system, comprising the following steps: collecting hemodynamic characteristic information of the patient; collecting respiratory characteristic information of the patient during the time period of collecting hemodynamic characteristic information; and, based on the blood oxygen saturation (reflecting the degree of oxygen binding to hemoglobin in the patient's arterial blood) and blood flow velocity (reflecting the speed of blood flow in the patient's blood vessels) obtained through the hemodynamic characteristic information, and simultaneously based on the patient's respiratory rate obtained through the respiratory characteristic information, changing the oxygen supply mode provided to the patient. By utilizing the driving method of this invention, this method can provide a more accurate assessment of oxygen usage in ICUs with limited oxygen resources, and thus more accurately determine the rational use of oxygen. For example, when using central oxygen supply, the total oxygen supply is determined based on the number of beds. Using the method of this invention, the number of temporarily added beds can be predicted under the premise of individualized oxygen supply, so as to provide more emergency rescue opportunities in certain situations. In the case of oxygen cylinder supply, since the oxygen supply can be determined individually, the usage of oxygen cylinders can be predicted in advance, reducing the frequency of replacement while providing more opportunities to save lives.

[0032] According to a preferred embodiment, when the patient's blood oxygen saturation is between a first threshold and a second threshold reflecting mild hypoxia, the patient's respiratory rate is lower than the lower limit of a preset respiratory rate range, and the patient's blood flow velocity is lower than the lower limit of a preset flow velocity range, the processor controls the oxygen supply unit to provide oxygen to the patient in an oxygen supply mode with a first oxygen flow rate and intermittent oxygen supply. Attached Figure Description

[0033] Figure 1 This is a simplified schematic diagram of the module connection relationship of an intelligent emergency respiratory assistance system according to a preferred embodiment of the present invention;

[0034] Figure 2 This is a schematic diagram illustrating the working process of an intelligent emergency respiratory support system according to a preferred embodiment of the present invention;

[0035] Figure 3 This is a schematic diagram of time-integrated detection data according to a preferred embodiment of the present invention;

[0036] Figure 4 This is a flowchart of the workflow of an intelligent emergency respiratory assistance system according to a preferred embodiment of the present invention.

[0037] List of reference numerals

[0038] 100: First acquisition unit; 200: Second acquisition unit; 300: Processor; 400: Oxygen supply unit. Detailed Implementation

[0039] The following is a detailed explanation with reference to the accompanying drawings.

[0040] Under normal circumstances, when the body's blood oxygen saturation decreases, the heart rate increases to obtain sufficient oxygen for metabolism. When the body's blood oxygen saturation is high, the body's oxygen demand decreases, and the heart rate slows down. However, in some special cases, such as when a patient experiences bradycardia, their heart rate may be lower than normal. Brain neurons consume a large amount of oxygen and are highly dependent on it; five minutes of oxygen deprivation in the brain can lead to neuronal apoptosis. Brain blood oxygen saturation is a percentage reflecting the balance between oxygen consumption and supply in brain tissue. It is a key indicator of the brain's physiological signals and has significant importance in scientific research and clinical medicine. However, in critically ill patients undergoing special brain resuscitation, pathological oxygen-dependent oxygen consumption (where increases or decreases in oxygen consumption vary with increases or decreases in oxygen supply) may occur. Studies have shown that the oxygen supply and demand in the brain varies at different stages after brain injury. In the early stage of injury (within 6 hours of injury), cerebral blood flow (CBF) decreases, but measurements of the arterial-jugular venous oxygen content difference reveal that overall brain oxygen uptake is normal, indicating that the body has a certain regulatory function, prioritizing the oxygen content of vital organs. Therefore, this application uses different blood oxygen saturation levels as a standard to assess the severity of hypoxia. Under normal conditions, the body maintains a dynamic balance between oxygen supply and consumption. When a patient is hypoxic, it is necessary to provide oxygen promptly to maintain normal oxygen levels in the body and prevent prolonged hypoxia from leading to cerebral hypoxia.

[0041] Existing oxygen supply technologies only use blood oxygen saturation as a reference standard for oxygen supply modes without considering the body's actual oxygen consumption characteristics, ignoring individual patient differences, and thus failing to guarantee effective oxygen supply. This application provides a technical solution to the above problems, as detailed in the description of the embodiments.

[0042] In this application, respiratory characteristic information refers to the characteristic information of gas exchange between the body and the external environment. Preferably, respiratory characteristic information can be reflected by respiratory rate. Hemodynamic characteristic information is information reflecting the characteristics and laws of blood and its components' movement within the body. Preferably, hemodynamic characteristic information includes blood flow velocity, blood flow resistance, blood flow rate, blood pressure, and blood oxygen saturation.

[0043] The preset respiratory rate range refers to the range of respiratory rate variation in a normal, resting state. Preferably, the preset respiratory rate range is 16 to 20 breaths per minute.

[0044] In this application, the preset flow velocity range refers to the range of variation in the arterial blood flow velocity of a normal organism. Preferably, the arterial blood flow velocity (preset flow velocity range) can be 5 to 10 cm / s.

[0045] It should be noted that the driving method of the intelligent emergency respiratory assistance system of this application is not for identifying, determining or eliminating the cause or lesion, nor is it for the direct purpose of obtaining disease diagnosis results or health status. The method is only a method of using the monitored physiological parameters of the patient as intermediate information to adjust the oxygen flow rate according to the patient's physical condition or physiological parameters in oxygen supply to provide personalized oxygen supply.

[0046] Example 1

[0047] This embodiment uses a patient suffering brain injury from a fall from a height as an example to illustrate the specific workflow of the intelligent emergency respiratory assistance system. The intelligent emergency respiratory assistance system includes a first acquisition unit 100 for collecting the patient's hemodynamic characteristic information; a second acquisition unit 200 for collecting the patient's respiratory characteristic information during the time period of hemodynamic characteristic information collection; an oxygen supply unit 400 for providing oxygen to the patient based on the patient's hemodynamic and respiratory characteristic information; and a processor 300, which is signal-connected to the first acquisition unit 100, the second acquisition unit 200, and the oxygen supply unit 400, respectively. Figure 1 As shown.

[0048] Preferably, the processor 300 is connected to the first acquisition unit 100 via a wired or wireless means. Specifically, the processor 300 is connected to the first acquisition unit 100 via WLAN or Bluetooth.

[0049] The first acquisition unit 100 is, for example, a hemodynamic monitoring device, which uses the flow of blood in the body and the physical properties of blood vessels to measure human hemodynamic parameters, such as the patient's blood flow velocity, pressure, and blood volume, for example, to assess the function of the heart and blood vessels such as the carotid artery. The hemodynamic monitoring device mainly includes a flow velocity probe, a pressure sensor, and a blood volume sensor. The flow velocity probe measures the velocity of blood in blood vessels using an ultrasonic probe. The pressure sensor assesses organ perfusion by measuring the pressure value and pressure changes of blood in blood vessels. The blood volume sensor determines the water content in the blood by measuring the conductivity of the blood and further assesses the state of circulating blood volume. In this invention, the detection sites for patients with brain injury due to falls from a height are the left and right common carotid arteries. The detection indicators include: the maximum (Vmax), minimum (Vmin), and average (Vmean) blood flow velocities of the common carotid arteries; the average blood flow of the common carotid arteries (Qmean); cerebrovascular peripheral resistance (RV); and characteristic impedance (Z). CV ), pulse wave velocity (WV), critical pressure (CP), diastolic pressure to critical pressure difference (DP), dynamic resistance (DR), and blood oxygen saturation (SpO2).

[0050] Preferably, the first acquisition unit 100 can also be composed of a bracelet and a pressure sensor from the TL-400 non-invasive real-time arterial blood pressure and hemodynamics detection system. The TL-400 non-invasive real-time arterial blood pressure and hemodynamics detection system can monitor 15 blood flow parameters in real time, including systemic vascular resistance, stroke volume, continuous cardiac output, and blood oxygen saturation. For example, the hemodynamic characteristics of the patient can be obtained by wearing the TL-400 bracelet on the patient's wrist. Preferably, the hemodynamic characteristics acquired by the first acquisition unit 100 are sent to the processor 300, which determines whether the patient's hemodynamic characteristics are normal based on a stored program.

[0051] Preferably, the processor 300 and the second acquisition unit 200 are connected via wired or wireless means. Specifically, the processor 300 and the second acquisition unit 200 are connected via WLAN or Bluetooth.

[0052] Preferably, the second acquisition unit 200 can be a flow sensor. The indicators acquired by the second acquisition unit 200 include respiratory rate and respiratory depth. Preferably, the respiratory characteristic information is measured by a flow sensor (such as an SFM4200-MGE flow sensor or a MEMS micro-flow sensor) or a pressure sensor. Preferably, the respiratory rate can be measured by a respiratory measuring instrument. Preferably, the respiratory characteristic information acquired by the second acquisition unit 200 is sent to the processor 300, which determines whether the patient's respiratory characteristic information is normal based on a stored program.

[0053] According to a preferred embodiment, after receiving data from the first acquisition unit 100 and the second acquisition unit 200, the processor 300 filters and integrates the data to obtain effective data that can be used to adjust the oxygen supply unit 400, such as... Figure 2As shown. Preferably, in this embodiment, blood oxygen saturation, the average value of carotid artery blood flow velocity (blood flow velocity), and respiratory rate are used as valid data. The aforementioned valid data is only an exemplary combination of valid data, and different combinations of valid data can be set according to specific circumstances. This application does not provide examples of each combination. The indicators detected by the hemodynamic detector during actual operation include the maximum value (Vmax), minimum value (Vmin), and average value (Vmean) of carotid artery blood flow velocity, the average blood flow of the carotid artery (Qmean), cerebrovascular peripheral resistance (RV), characteristic impedance (Zcv), pulse wave velocity (WV), critical pressure (CP), the difference between diastolic blood pressure and critical pressure (DP), dynamic resistance (DR), and blood oxygen saturation (SpO2). The hemodynamic detector sends the data corresponding to the detected indicators to the processor 300. The indicators detected by the flow sensor during actual operation include respiratory rate and respiratory depth. The flow sensor sends the data corresponding to the detected indicators to the processor 300. Preferably, the processor 300 filters the data after receiving it. Preferably, the processor 300 filters data on blood oxygen saturation, the average value of carotid artery blood flow velocity (blood flow velocity), and respiratory rate. The benefit of the processor 300 filtering the data is that selecting valid data reduces the system's data processing load. Using all data for oxygen regulation significantly increases the operating load on the processor 300, not only increasing the system's computation time but also increasing the probability of errors in the calculation results. In actual testing, there is a time lag between the processor 300 receiving the detection results from the hemodynamic analyzer and the flow sensor; therefore, after filtering valid data, the processor 300 still needs to sort and integrate the data.

[0054] Specifically, the hemodynamic monitor sends the detected data to the processor 300 at a first time interval. After receiving the data, the processor 300 filters out the average blood oxygen saturation and carotid artery blood flow velocity (blood flow velocity) and assigns a first time tag to the data of the average blood oxygen saturation and carotid artery blood flow velocity (blood flow velocity) sent at that moment. Similarly, the flow sensor sends the detected data to the processor 300 at a second time interval. After receiving the data, the processor 300 filters out the respiratory rate and assigns a second time tag to the data of the respiratory rate sent at that moment. When the first time tag and the second time tag represent the patient's average blood oxygen saturation, carotid artery blood flow velocity (blood flow velocity), and respiratory rate at the same moment, the processor compares the physiological parameter data representing the same moment with their respective critical standards to adjust the oxygen flow rate of the oxygen supply unit 400.

[0055] Different monitoring instruments take different processing times to acquire signals and convert them into usable data. Therefore, processor 300 is needed to sort and integrate data from different monitoring instruments, such as... Figure 3 As shown in the diagram, assuming the patient monitoring using a hemodynamic monitor and flow sensor begins at 9:00 AM, the hemodynamic monitor sends data to processor 300 every 3 minutes. Processor 300 filters the data for blood oxygen saturation and blood flow velocity, assigning a timestamp of 09:03-SpO2 for blood oxygen saturation and 09:03-Vmean for blood flow velocity at that moment. The flow sensor sends data to processor 300 every 6 minutes, filtering the data for respiratory rate and assigning a timestamp of 09:06-RR for respiratory rate at that moment. When the time label for blood oxygen saturation is assigned as 0906-SpO2 and the time label for blood flow velocity is assigned as 0906-Vmean, the processor 300 compares the data of 0906-SpO2, 0906-Vmean, and 0906-RR with their respective critical standards. Based on the comparison results, the processor 300 adjusts the oxygen supply unit 400 to supply oxygen to the patient in different oxygen supply modes.

[0056] According to a preferred embodiment, in a hospital with a large number of patients / beds in various departments, for example, the general surgery department has 30 beds using the system. The data collected by the first acquisition unit 100 and the second acquisition unit 200 corresponding to each patient bed are sent to the same processor 300. Therefore, the processor 300 can also add bed tags to the data of patients in different beds to avoid data confusion. For example, bed 1 in ward 0301, bed 4 in ward 0301, bed 2 in ward 0502, and bed 3 in ward 0503 all use the system to provide oxygen to patients. The data acquired by the system corresponding to different beds in different wards are sent to the same processor 300. At 10:00 AM, the hemodynamic monitoring devices in beds 1 and 4 of ward 0301, beds 2 of ward 0502, and beds 3 of ward 0503 sent the acquired signals to processor 300. Processor 300 filtered the data and added bed-specific tags to the blood oxygen saturation and blood flow velocity of patients in different beds. The bed-specific tag for the blood oxygen saturation of patient in bed 1 of ward 0301 was 1003030101-SpO2, and the blood flow velocity was 1003030101-Vmean. The bed-specific tag for the blood oxygen saturation of patient in bed 4 of ward 0301 was 1003030104-SpO2, and the blood flow velocity was 1003030104-Vmean. The patient in bed 2 of ward 0502 has a bed label for oxygen saturation of 1003050202-SpO2 and blood flow velocity of 1003050202-Vmean. The patient in bed 3 of ward 0503 has a bed label for oxygen saturation of 1003050303-SpO2 and blood flow velocity of 1003050303-Vmean. The above are examples of bed labels generated by processor 300 after data filtering; not all examples are listed here. Preferably, processor 300 generates instructions for the corresponding oxygen supply mode based on the bed labels to avoid confusion and outputting instructions to the oxygen supply unit 400 that do not match the patient's actual condition.

[0057] Preferably, the processor 300 uploads the data with bed tags to the hospital's HIS system for data storage and management.

[0058] Preferably, the processor 300 is connected to the oxygen supply unit 400 via a wired or wireless means. Specifically, the processor 300 is connected to the oxygen supply unit 400 via WLAN or Bluetooth. Preferably, the processor 300 adjusts the oxygen supply mode provided by the oxygen supply unit 400 to the patient based on the hemodynamic feature information obtained by the first acquisition unit 100 and the respiratory feature information obtained by the second acquisition unit 200.

[0059] According to a preferred embodiment, based on the blood oxygen saturation, which reflects the degree of oxygen binding with hemoglobin in the patient's arterial blood, and the blood flow velocity, which reflects the speed of blood flow in the patient's blood vessels, obtained through hemodynamic characteristic information, and simultaneously based on the patient's respiratory rate, obtained through respiratory characteristic information, the processor 300 controls the oxygen supply unit 400 to change the oxygen supply mode provided to the patient.

[0060] According to a preferred embodiment, the processor 300 is configured to: control the oxygen supply unit 400 to provide oxygen to the patient in a first oxygen flow rate and intermittent oxygen supply mode when the patient's blood oxygen saturation is between a first threshold and a second threshold reflecting mild hypoxia, the patient's respiratory rate is lower than the lower limit of a preset respiratory rate range, and the patient's blood flow velocity is lower than the lower limit of a preset flow velocity range.

[0061] Preferably, the lower limit of the preset respiratory rate range can be set to 16 breaths / min.

[0062] Preferably, the lower limit of the preset flow rate range can be set to 5 cm / s.

[0063] Preferably, the first threshold can be set to 90% to 95%. Preferably, the first threshold can be set to 90%. Preferably, the first threshold can be set to 92%. Preferably, the first threshold can be set to 94%. Preferably, the first threshold can be set to 95%.

[0064] According to a preferred embodiment, intermittent oxygen administration refers to providing oxygen to the patient during the expiratory or inspiratory phases. Preferably, intermittent oxygen administration refers to providing oxygen to the patient during the inspiratory phase.

[0065] Preferably, this embodiment provides a method for detecting the respiratory phase, which utilizes a differential pressure sensor. Specifically, the differential pressure sensor includes a first differential pressure sensor and a second differential pressure sensor. The first differential pressure sensor is used for inspiratory measurement. The second differential pressure sensor is used for expiratory measurement. Preferably, this method determines the respiratory phase by comparing the differential pressure values ​​of the first and second differential pressure sensors. Specifically, when the differential pressure value of the first differential pressure sensor is greater than the differential pressure value of the second differential pressure sensor, it is determined to be an inspiratory state; when the differential pressure value of the second differential pressure sensor is greater than the differential pressure value of the first differential pressure sensor, it is determined to be an expiratory state.

[0066] Preferably, the processor 300 is connected to both the first differential pressure sensor and the second differential pressure sensor. Specifically, the processor 300 is connected to the first differential pressure sensor via WLAN or Bluetooth. Specifically, the processor 300 is connected to the second differential pressure sensor via WLAN or Bluetooth. Preferably, the processor 300 adjusts the oxygen supply mode of the oxygen supply unit 400 according to the patient's respiratory stage.

[0067] In this embodiment, intermittent oxygen supply can refer to oxygen supply only during the inhalation phase, oxygen supply only during the exhalation phase, or oxygen supply to the patient at intervals of one or more inhalation periods.

[0068] Figure 4 This is a flowchart of the intelligent emergency respiratory assistance system provided in this embodiment.

[0069] According to a preferred embodiment, the processor 300 is configured to: control the oxygen supply unit 400 to provide oxygen to the patient in a first oxygen flow rate and a continuous oxygen supply mode when the patient's blood oxygen saturation is between a first threshold and a second threshold reflecting mild hypoxia, the patient's respiratory rate is lower than the lower limit of a preset respiratory rate range, and the patient's blood flow velocity exceeds the upper limit of a preset flow velocity range.

[0070] Preferably, the first oxygen flow rate can be set to 1-2 L / min. Preferably, the first oxygen flow rate can be set to 1 L / min. Preferably, the first oxygen flow rate can be set to 1.5 L / min. Preferably, the first oxygen flow rate can be set to 2 L / min.

[0071] Preferably, continuous oxygen administration refers to continuously supplying oxygen to the patient during the resuscitation period or the period during which normal breathing has not been restored.

[0072] According to a preferred embodiment, the processor 300 is configured to: control the oxygen supply unit 400 to provide oxygen to the patient in an intermittent oxygen supply mode with a second oxygen flow rate when the patient's blood oxygen saturation is lower than a first threshold reflecting that the patient is in mild hypoxia, the patient's respiratory rate exceeds the upper limit of a preset respiratory rate range, and the patient's blood flow velocity is lower than the lower limit of a preset flow velocity range, wherein the second oxygen flow rate is greater than the first oxygen flow rate.

[0073] Preferably, the upper limit of the preset respiratory rate range can be set to 20 breaths / minute.

[0074] Preferably, the second oxygen flow rate can be set to 2-4 L / min. Preferably, the second oxygen flow rate can be set to 2.5 L / min. Preferably, the second oxygen flow rate can be set to 3 L / min. Preferably, the second oxygen flow rate can be set to 3.5 L / min.

[0075] According to a preferred embodiment, the processor 300 is configured to: control the oxygen supply unit 400 to provide oxygen to the patient in a continuous oxygen supply mode with a second oxygen flow rate when the patient's blood oxygen saturation is between a first threshold and a second threshold reflecting mild hypoxia, the patient's respiratory rate exceeds the upper limit of a preset respiratory rate range, and the patient's blood flow velocity exceeds the upper limit of a preset flow velocity range.

[0076] Preferably, the upper limit of the preset flow rate range can be set to 10 cm / s.

[0077] According to a preferred embodiment, the processor 300 is configured to: when the patient's blood oxygen saturation is lower than a second threshold reflecting the patient's cerebral hypoxia, control the oxygen supply unit 400 to provide oxygen to the patient in a continuous oxygen supply mode with a third oxygen flow rate, wherein the third oxygen flow rate is greater than the second oxygen flow rate, and the second threshold is lower than the first threshold.

[0078] Preferably, the second threshold can be set to 85% to 89%. Preferably, the second threshold can be set to 85%. Preferably, the second threshold can be set to 87%. Preferably, the second threshold can be set to 88%. Preferably, the second threshold can be set to 89%.

[0079] Preferably, the third oxygen flow rate can be set to 4–6 L / min. Preferably, the third oxygen flow rate can be set to 4 L / min. Preferably, the third oxygen flow rate can be set to 4.5 L / min. Preferably, the third oxygen flow rate can be set to 5 L / min. Preferably, the third oxygen flow rate can be set to 5.5 L / min.

[0080] Preferably, in this embodiment, the oxygen supply unit is an emergency breathing device. Preferably, the emergency breathing device can be an emergency breathing bag. Preferably, the emergency breathing device can be an emergency ventilator.

[0081] According to a preferred embodiment, the emergency breathing device in the intelligent emergency breathing assistance system includes a breathing mask.

[0082] According to a preferred embodiment, the intelligent emergency respiratory assistance system further includes a fourth acquisition unit for measuring the seal between the breathing mask and the face.

[0083] Preferably, the fourth acquisition unit can be a pressure sensor. The pressure sensor is located inside the breathing mask, near the airway, at the protrusion.

[0084] As the patient's posture or position changes, the seal between the breathing mask and the patient's face may change. When the seal between the breathing mask and the patient's face decreases, oxygen entering the breathing mask will escape, reducing the amount of oxygen actually inhaled by the patient and thus reducing the effectiveness of emergency treatment.

[0085] Example 2

[0086] This embodiment provides an emergency breathing device. According to a preferred embodiment, the emergency breathing device can be used in conjunction with an intelligent emergency respiratory support system. Preferably, the emergency breathing device and the intelligent emergency respiratory support system can be used together during patient transport and in emergency settings.

[0087] Preferably, when a patient experiences an emergency, medical personnel place the breathing mask on the appropriate position on the patient's face, turn on the power of the emergency breathing device, the rubber bladder is compressed, and oxygen enters the rubber bladder through a one-way valve. The oxygen inside the rubber bladder enters the patient's body through the oxygen delivery tube and the breathing mask.

[0088] Preferably, the emergency breathing device includes an airbag assembly and an automatic airbag compression module. The automatic airbag compression module is used in conjunction with the airbag assembly to achieve automatic compression. The airbag assembly includes a breathing mask, an airbag body, and driven links. The driven links consist of an angle-adjustable first driven link and a second driven link. The airbag body is provided with an upwardly extending mounting base, a slot for placing the airbag assembly, and a fork. The fork is connected to the second driven link. Preferably, the connection between the fork and the second driven link is hinged. The first driven link is located above the slot. A lifting mechanism is mounted on the mounting base. The second driven link is driven by a driving link and connected to the moving end of the lifting mechanism. The lifting mechanism drives the second driven link to swing through the driving link, and the first driven link swings simultaneously. The automatic airbag compression module includes a motor and a placement platform. The motor is located below the center of the placement platform. The motor and the placement platform are connected by bearings. Preferably, the motor provides power to the lifting mechanism. Based on the patient's oxygen demand, the processor 300 controls the lifting frequency of the motor on the lifting mechanism, thereby controlling the compression frequency of the airbag. For example, when the compression frequency is 12-16 times / min, the oxygen flow rate can reach 5-10 L / min.

[0089] Example 3

[0090] This embodiment provides an intelligent emergency respiratory assistance method. The method includes the following steps: collecting the patient's hemodynamic characteristic information; collecting the patient's respiratory characteristic information during the time period of hemodynamic characteristic information collection; and, based on the blood oxygen saturation (reflecting the degree of oxygen binding to hemoglobin in the patient's arterial blood) and blood flow velocity (reflecting the speed of blood flow in the patient's blood vessels) obtained from the hemodynamic characteristic information, and simultaneously based on the patient's respiratory rate obtained from the respiratory characteristic information, changing the oxygen supply mode provided to the patient. Preferably, the processor 300 controls the oxygen supply unit 400 to change the oxygen supply mode provided to the patient.

[0091] It should be noted that the specific embodiments described above are exemplary. Those skilled in the art can devise various solutions inspired by the disclosure of this invention, and these solutions all fall within the scope of this invention and its protection. Those skilled in the art should understand that this specification and its accompanying drawings are illustrative and do not constitute a limitation on the claims. The scope of protection of this invention is defined by the claims and their equivalents. This specification contains multiple inventive concepts; terms such as "preferredly," "according to a preferred embodiment," or "optionally" indicate that the corresponding paragraph discloses an independent concept. The applicant reserves the right to file divisional applications based on each inventive concept. Throughout the text, features introduced by "preferredly" are merely optional and should not be construed as mandatory. Therefore, the applicant reserves the right to abandon or delete relevant preferred features at any time.

Claims

1. An intelligent emergency respiratory support system, comprising: The first acquisition unit (100) is used to collect hemodynamic characteristic information of patients. A second acquisition unit (200) used to acquire respiratory characteristic information of the patient during the time period of acquiring the hemodynamic characteristic information; An oxygen supply unit (400) for providing oxygen to the patient based on the patient's hemodynamic and respiratory characteristics, and a processor (300), wherein the processor (300) is signal-connected to the first acquisition unit (100), the second acquisition unit (200), and the oxygen supply unit (400), respectively, characterized in that, Based on the blood oxygen saturation, which reflects the degree of oxygen binding with hemoglobin in the patient's arterial blood, and the blood flow velocity, which reflects the speed of blood flow in the patient's blood vessels, obtained through the hemodynamic feature information, and simultaneously based on the patient's respiratory rate obtained through the respiratory feature information, the processor (300) controls the oxygen supply unit (400) to change the oxygen supply mode provided to the patient based on the blood oxygen saturation, the average carotid artery blood flow velocity, and the respiratory rate at the same time. The processor (300) is configured to: when the patient's blood oxygen saturation is between a first threshold and a second threshold reflecting mild hypoxia, the patient's respiratory rate is lower than the lower limit of a preset respiratory rate range, and the patient's blood flow velocity is lower than the lower limit of a preset flow velocity range, control the oxygen supply unit (400) to provide oxygen to the patient in an oxygen supply mode with a first oxygen flow rate and intermittent oxygen supply. When the patient's blood oxygen saturation is between the first threshold and the second threshold reflecting mild hypoxia, the patient's respiratory rate is lower than the lower limit of the preset respiratory rate range, and the patient's blood flow velocity exceeds the upper limit of the preset flow velocity range, the oxygen supply unit (400) is controlled to provide oxygen to the patient in an oxygen supply mode with a first oxygen flow rate and continuous oxygen supply. When the patient's blood oxygen saturation is between the first threshold and the second threshold reflecting mild hypoxia, the patient's respiratory rate exceeds the upper limit of the preset respiratory rate range, and the patient's blood flow velocity is lower than the lower limit of the preset flow velocity range, the oxygen supply unit (400) is controlled to provide oxygen to the patient in an oxygen supply mode of second oxygen flow rate and intermittent oxygen supply, wherein the second oxygen flow rate is greater than the first oxygen flow rate. When the patient's blood oxygen saturation is between the first threshold and the second threshold reflecting mild hypoxia, the patient's respiratory rate exceeds the upper limit of the preset respiratory rate range, and the patient's blood flow velocity exceeds the upper limit of the preset flow velocity range, the oxygen supply unit (400) is controlled to provide oxygen to the patient in a second oxygen flow rate and continuous oxygen supply mode. When the patient's blood oxygen saturation is lower than a second threshold reflecting brain hypoxia, the oxygen supply unit (400) is controlled to provide oxygen to the patient in a continuous oxygen supply mode with a third oxygen flow rate, wherein the third oxygen flow rate is greater than the second oxygen flow rate and the second threshold is lower than the first threshold.

2. The system of claim 1, wherein, Intermittent oxygen administration refers to providing oxygen to the patient during the expiratory or inspiratory phases.

3. The system according to claim 1, characterized in that, Intermittent oxygen administration refers to providing oxygen to the patient during the patient's inspiratory phase.

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