Intelligent air supply anesthesia machine based on physical form dynamic monitoring

Abstract

The invention relates to the technical field of medical equipment, in particular to an intelligent air supply anaesthesia machine based on physical form dynamic monitoring, which is characterized in that real-time information acquisition is carried out on a breathing bag in a breathing loop system through a sensor to obtain corresponding three-dimensional data information, and a corresponding three-dimensional model is constructed in a three-dimensional space; real-time calculation is carried out based on the model to output a dynamic filling degree and a breathing bag filling rate which represent the physical form of the breathing bag, and comparison is carried out based on the change condition of the dynamic filling degree and the breathing bag filling rate in combination with a preset threshold value corresponding to the working state of the intelligent air supply anaesthesia machine; therefore, the flow rate is adjusted or a safety intervention strategy is triggered to adjust the opening degree of the pressure release valve according to the change condition of the filling rate of the breathing bag based on the judgment result. According to the method, the state of the breathing bag can be more effectively judged, whether the breathing bag is overfilled or insufficient in filling rate is determined, then targeted adjustment is conducted, and therefore the air supply anesthesia effect is improved.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, and in particular to an intelligent gas supply anesthesia machine based on dynamic monitoring of physical morphology. Background Technology

[0002] Anesthesia machines are core equipment for ensuring pain-free operation during surgery, achieving controlled anesthesia by precisely delivering a mixture of oxygen and anesthetic gases. However, existing anesthesia machines have significant shortcomings in terms of gas supply control precision, safety redundancy, and intelligence level. Therefore, there is an urgent need to improve the gas supply control precision and intelligence level by enhancing the dynamic monitoring of anesthesia machines.

[0003] Chinese Patent Publication No. CN110893257A discloses a self-regulating pressure-limiting airbag. The technical solution includes an airbag and a sliding release component disposed on the airbag wall. The sliding release component includes a sliding cover and a liquid storage box, which are fixedly connected to two different positions on the airbag wall and are slidably assembled with each other. The airbag wall pulls the sliding cover and the liquid storage box to slide relative to each other under the action of airbag inflation. The liquid storage box is filled with a solvent for dissolving the airbag wall material and has a release hole that is covered by the sliding cover. The sliding cover exposes the release hole on the liquid storage box by sliding relative to the liquid storage box. The relevant technical solution can create a weak point in the airbag wall by sliding the release component and the release hole, thereby causing gas leakage from the airbag through internal pressure. This achieves automatic pressure limiting control of the airbag, avoiding barotrauma to the patient's lungs and safety hazards in the operating room caused by over-inflation of the airbag. However, when the airbag is over-inflated, the airbag wall ruptures through chemical dissolution (such as D-limonene), which is an irreversible destructive process. Once the airbag ruptures, the device immediately fails and needs to be replaced urgently. In a medical environment (such as during surgery or anesthesia), this may lead to operation interruption, delay in treatment, or even endanger patient safety. Furthermore, it does not involve deformation monitoring, so it cannot detect if the airbag is inflated too slowly or too insufficiently (which may lead to insufficient oxygen supply). It is a reactive response (solving the problem after rupture) rather than directly sensing the physical deformation of the airbag, and cannot provide preventive control, thus affecting the safety and effectiveness of gas-supply anesthesia. Summary of the Invention

[0004] To address this, the present invention provides an intelligent gas supply anesthesia machine based on dynamic monitoring of physical morphology, which overcomes the problems in the prior art where there is a delay and the inability to directly sense the physical deformation of the breathing bag, thus failing to detect over-inflation or rupture of the breathing bag in a timely manner, or insufficient inflation rate, and failing to provide preventive control, thereby affecting the safety and efficacy of gas supply anesthesia.

[0005] To achieve the above objectives, the present invention provides an intelligent gas supply anesthesia machine based on dynamic monitoring of physical morphology, comprising: A breathing circuit system, which includes a breathing bag for adjusting breathing pressure and volume through elastic recoil; The status monitoring unit includes sensors for real-time information acquisition of the breathing bag to obtain three-dimensional data information corresponding to the breathing bag, wherein the three-dimensional data information includes three-dimensional coordinate point cloud data. The model building unit is connected to the state monitoring unit and is used to build a three-dimensional model of the breathing bag in three-dimensional space according to the three-dimensional data information. Based on the model, it performs real-time calculations and outputs dynamic deformation state parameters that characterize the physical shape of the breathing bag. The dynamic deformation state parameters include dynamic inflation degree and breathing bag inflation rate. An analysis unit, which is connected to the model building unit, is used to compare and determine whether the current state of the breathing bag meets the standard based on the dynamic filling degree and the breathing bag filling rate, combined with a preset threshold corresponding to the working state of the intelligent gas supply anesthesia machine. The intelligent adjustment unit, connected to the analysis unit, adjusts the flow rate or triggers a safety intervention strategy to adjust the opening of the pressure relief valve based on the current stage of the respirator status determination result and the change in the respirator inflation rate.

[0006] Furthermore, the working states of the intelligent gas supply anesthesia machine include mechanically controlled ventilation state, mechanically assisted ventilation state, spontaneous breathing state, and manually controlled ventilation state. Based on different working states, corresponding preset thresholds are determined, wherein the preset thresholds include preset dynamic filling degree and critical breathing bag filling rate. The dynamic inflation rate is the percentage of the actual inflation volume of the respirator in the current stage to the maximum inflatable volume, and the respirator inflation rate is the rate at which the respirator is inflated with gas in the current stage changes over time.

[0007] Furthermore, the analysis unit is also used to determine whether the current state of the respirator meets the standard based on the comparison result of the dynamic inflation degree and the preset dynamic inflation degree combined with the comparison result of the respirator inflation rate and the respirator inflation rate. If the dynamic inflation degree is greater than the first preset dynamic inflation degree and less than or equal to the second preset dynamic inflation degree, the current state of the breathing bag is re-determined based on the comparison result between the breathing bag inflation rate and the critical breathing bag inflation rate.

[0008] Furthermore, the analysis unit is also used to determine flow rate adjustment based on the comparison result of the breathing bag inflation rate and the critical breathing bag inflation rate. If the inflation rate of the breathing bag is less than the critical inflation rate of the breathing bag, it is determined that the inflation rate of the breathing bag in the current stage is lower than expected, and the opening of the gas flow control valve is increased based on the inflation rate difference. The gas flow control valve is connected to the breathing circuit system. If the inflator rate of the breathing bag is greater than the critical inflator rate of the breathing bag, it is determined that the inflator rate of the breathing bag in the current stage is higher than expected, and the opening of the gas flow control valve is reduced based on the inflator rate offset value. The inflation rate difference is the difference between the critical respirator inflation rate and the respirator inflation rate, and the inflation rate offset is the difference between the respirator inflation rate and the critical respirator inflation rate.

[0009] Furthermore, the analysis unit is also used to determine the increase of the opening of the gas flow control valve based on the comparison result between the filling rate difference and the preset filling rate difference, and the increase of the gas flow control valve opening is positively correlated with the filling rate difference.

[0010] Furthermore, the analysis unit is also used to determine the reduction of the opening degree of the gas flow control valve based on the comparison result between the filling rate offset value and the preset filling rate offset value, wherein the reduction of the gas flow control valve opening degree is positively correlated with the filling rate offset value.

[0011] Furthermore, the analysis unit is also used to determine, based on the comparison result that the dynamic inflation degree is greater than the second preset dynamic inflation degree, that the current stage of the breathing bag status does not meet the standard and to trigger the safety intervention strategy. The safety intervention strategies include issuing an alarm only and issuing an alarm and activating a pressure relief valve, which is connected to the breathing circuit system.

[0012] Furthermore, the analysis unit is also used to determine the safety intervention strategy based on the comparison result between the fullness difference and the critical fullness difference; If the fullness difference is less than or equal to the critical fullness difference, then the security intervention strategy is determined to be issuing only an alarm. If the filling degree difference is greater than the critical filling degree difference, then the safety intervention strategy is determined to be to issue an alarm and activate the pressure relief valve; The fullness difference is the difference between the dynamic fullness and the second preset dynamic fullness.

[0013] Furthermore, the analysis unit is also used to perform a control of the opening degree of the pressure relief valve according to the control ratio when the pressure relief valve is activated, wherein the control ratio is determined based on the pressure relief filling degree difference or the comparison result of the intervention time and the critical intervention time; The pressure relief filling difference is a new filling difference value obtained by continuous monitoring after the pressure relief valve has been activated for a period of time. The intervention duration is the duration during which the filling degree difference is continuously monitored to be greater than the critical filling degree difference within a preset time period after the pressure relief valve is activated.

[0014] Furthermore, the analysis unit is also used to acquire the patient's physiological parameters and combine them with the preset dynamic inflation degree and the critical breathing bag inflation rate corresponding to different working states of the intelligent gas supply anesthesia machine, and to adjust the critical breathing bag inflation rate based on the opening degree of the pressure relief valve.

[0015] Compared with existing technologies, the intelligent gas supply anesthesia machine based on dynamic monitoring of physical morphology of the present invention has the following advantages: It collects real-time information from the respirator in the breathing circuit system using sensors to obtain corresponding three-dimensional data, constructs a three-dimensional model of the respirator in three-dimensional space, and performs real-time calculations based on the model to output the dynamic filling degree and respirator filling rate, representing the physical morphology of the respirator. The changes in dynamic filling degree and respirator filling rate are compared with preset thresholds corresponding to the working state of the intelligent gas supply anesthesia machine to determine whether the current respirator state meets the standard. Based on the determination result, it determines whether to maintain the current gas supply parameters, adjust the flow rate, or trigger a safety intervention strategy. Thus, by monitoring the dynamic filling degree and respirator filling rate, the respirator state can be more effectively determined, and potential risks of over-inflation or rupture of the respirator can be detected in a timely manner, or insufficient filling rate can affect ventilation and anesthesia effects. Appropriate adjustments can prevent respirator rupture or ensure sufficient ventilation, improving the intelligence of the gas supply anesthesia machine.

[0016] Furthermore, the present invention can analyze the current stage of the respirator state by comparing the dynamic inflation degree with the preset dynamic inflation degree, thereby determining whether the current stage of the respirator state meets the standard. Based on the preliminary determination, it can also obtain the comparison result of the respirator inflation rate and the critical respirator inflation rate to further determine the respirator state, thereby improving the accuracy of the determination process and the precision of the analysis.

[0017] Furthermore, when the inflation rate of the respirator is determined to be lower than expected based on the comparison between the respirator inflation rate and the critical respirator inflation rate, the present invention determines the increase in the opening of the gas flow control valve based on the comparison between the inflation rate difference and the preset inflation rate difference, thereby increasing the amount of gas contained in the respirator to ensure adequate ventilation; when the inflation rate of the respirator is determined to be higher than expected, the invention determines the decrease in the opening of the gas flow control valve based on the comparison between the inflation rate offset value and the preset inflation rate offset value, thereby reducing the amount of gas inhaled by the respirator to avoid over-inflation of the respirator leading to respirator rupture.

[0018] Furthermore, when the condition of the breathing bag is determined to be non-compliant with the standard, the present invention can determine the corresponding safety intervention strategy based on the comparison result of the filling difference and the critical filling difference, thereby achieving graded response and improving safety efficiency; it also determines to activate the pressure relief valve when the filling difference is greater than the critical filling difference, thereby preventing high-pressure gas from entering the patient's airway and effectively avoiding barotrauma.

[0019] Furthermore, the present invention can also determine the opening ratio of the pressure relief valve based on the comparison results of the intervention duration and the critical intervention duration, so as to achieve graded control, thereby effectively reducing physical damage to the breathing bag and reducing the physiological risks to patients. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the intelligent gas supply anesthesia machine based on dynamic monitoring of physical morphology in this embodiment; Figure 2 This is a schematic diagram of the usage process of the intelligent gas supply anesthesia machine based on physical morphology dynamic monitoring in this embodiment; Figure 3 This embodiment presents a logic diagram for determining whether the breathing bag status meets the standard based on dynamic inflation and breathing bag inflation rate, and the corresponding processing. Figure 4 This is a logic diagram illustrating the reasons for determining abnormalities in the breathing bag status based on the breathing bag inflation rate and the corresponding processing in this embodiment. Figure 5 This is the logic diagram for determining the opening degree of the pressure relief valve based on the intervention duration in this embodiment. Detailed Implementation

[0021] To make the objectives and advantages of the present invention clearer, the present invention will be further described below with reference to embodiments; it should be understood that the specific embodiments described herein are merely for explaining the present invention and are not intended to limit the present invention.

[0022] Preferred embodiments of the present invention will now be described with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are merely illustrative of the technical principles of the present invention and are not intended to limit the scope of protection of the present invention.

[0023] It should be noted that in the description of this invention, the terms "upper", "lower", "left", "right", "inner", "outer", etc., which indicate directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings. This is only for the convenience of description and is not intended to indicate or imply that the device or element must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation of this invention.

[0024] Furthermore, it should be noted that, in the description of this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0025] Please see Figure 1 The diagram shown is a modular schematic of the intelligent gas-supply anesthesia machine based on dynamic monitoring of physical morphology in this embodiment. The intelligent gas-supply anesthesia machine includes a breathing circuit system, a status monitoring unit, a model building unit, an analysis unit, and an intelligent adjustment unit. The breathing circuit system includes a breathing bag for adjusting breathing pressure and volume through elastic recoil; a status monitoring unit includes sensors for real-time information acquisition of the breathing bag to obtain three-dimensional data information corresponding to the breathing bag, wherein the three-dimensional data information includes three-dimensional coordinate point cloud data; a model building unit connected to the status monitoring unit is used to construct a three-dimensional model of the breathing bag in three-dimensional space based on the three-dimensional data information, and to perform real-time calculations based on the model and output dynamic deformation state parameters characterizing the physical shape of the breathing bag, wherein the dynamic deformation state parameters include dynamic filling degree and breathing bag filling rate; an analysis unit connected to the model building unit is used to compare and judge the current breathing bag state based on the dynamic filling degree and the breathing bag filling rate, combined with a preset threshold corresponding to the working state of the intelligent gas supply anesthesia machine, to determine whether the current breathing bag state meets the standard; an intelligent adjustment unit connected to the analysis unit is used to adjust the flow rate or trigger a safety intervention strategy to adjust the opening of the pressure relief valve based on the change in the breathing bag filling rate according to the current breathing bag state judgment result.

[0026] Please see Figure 2 The diagram shown illustrates the usage process of the intelligent gas supply anesthesia machine based on dynamic physical morphology monitoring in this embodiment. The relevant process includes at least the following steps: S1: Real-time information acquisition of the breathing bag to obtain corresponding three-dimensional data information, including three-dimensional coordinate point cloud data; S2: Construct a three-dimensional model of the breathing bag in three-dimensional space based on the three-dimensional data information, and perform real-time calculations based on the model to obtain dynamic deformation state parameters that characterize the physical shape of the breathing bag. Among them, the dynamic deformation state parameters include dynamic inflation degree and breathing bag inflation rate. S3: Based on the dynamic filling degree and the breathing bag filling rate, and combined with the preset threshold corresponding to the working state of the intelligent gas supply anesthesia machine, a comparison and judgment are made to determine whether the breathing bag state at the current stage meets the standard. S4: Based on the current stage status of the breathing bag, adjust the flow rate or trigger a safety intervention strategy to adjust the opening of the pressure relief valve according to the change in the breathing bag inflation rate.

[0027] Specifically, the intelligent gas supply anesthesia machine has the following working states: mechanically controlled ventilation, mechanically assisted ventilation, spontaneous breathing, and manually controlled ventilation. Based on different working states, corresponding preset thresholds are determined. The preset thresholds include preset dynamic filling degree and critical breathing bag filling rate. The dynamic filling degree is the percentage of the actual filling volume of the breathing bag to the maximum filling volume at the current stage, and the breathing bag filling rate is the rate at which the breathing bag is filled with gas at the current stage changes over time.

[0028] Specifically, the analysis unit is also used to acquire the patient's physiological parameters and combine them with the preset dynamic inflation degree and the critical breathing bag inflation rate corresponding to different working states of the intelligent gas supply anesthesia machine, and to adjust the critical breathing bag inflation rate based on the opening of the pressure relief valve.

[0029] It is understood that, in this embodiment, the breathing circuit system also includes a breathing tubing, a carbon dioxide absorption canister, a breathing valve, an endotracheal tube, and a mask, etc. The intelligent gas supply anesthesia machine also includes a gas supply system (including compressed gas cylinders (oxygen, air, nitrous oxide, etc.) or a central gas supply system, as well as related pressure reducers, one-way valves, filters, and other components), a flow control system (including flow meters and mixers, etc.), a ventilator system, an anesthetic gas evaporation and delivery system (including an anesthetic vaporizer), and a monitoring and safety system (including oxygen concentration monitoring, airway pressure monitoring, end-tidal CO2 concentration monitoring, etc., as well as related alarm devices), etc. The sensors in the status monitoring unit can be non-contact sensors, such as millimeter-wave radar arrays, multi-view 3D vision sensors, or high-precision laser scanners. These non-contact sensors perform continuous, real-time spatial scanning of the respirator to acquire three-dimensional coordinate point cloud data or depth images of the respirator surface. A corresponding three-dimensional model is then constructed based on this data, and dynamic deformation state parameters are calculated in real-time. The process from acquiring point cloud data to outputting dynamic deformation state parameters includes fusion denoising, volume calculation, and deformation analysis. The preset dynamic filling degree and critical respirator filling rate differ under different operating states of the intelligent gas-supply anesthesia machine. Therefore, it is necessary to first determine the operating state of the intelligent gas-supply anesthesia machine during use, and then determine the corresponding preset threshold. Determining the preset threshold also requires acquiring patient physiological parameters (including weight, tidal volume, etc.). Furthermore, based on the model of the gas-supply anesthesia machine and historical monitoring data, combined with the respirator usage parameters of relevant anesthesia machines in existing technologies, the set values ​​of subsequent preset or critical parameters are determined. The intelligent gas-supply anesthesia machine operates in four states: mechanically controlled ventilation, mechanically assisted ventilation, spontaneous breathing, and manually controlled ventilation. Manual ventilation is further divided into mask-controlled ventilation and endotracheal tube-controlled ventilation. In mask-controlled ventilation, continuous and rapid dynamic adjustments are required using gas flow control valves and pressure relief valves to balance the supplemental or deflated air volume in the breathing bag. The standard for this is meeting safe and effective ventilation requirements. Once the current breathing bag status is deemed to meet the standard, the current parameters are maintained. Dynamic filling degree and breathing bag filling rate are quantifiable objective indicators, reducing the subjectivity and operational errors of traditional manual pressure measurement and providing a more reliable basis for status judgment.

[0030] Please see Figure 3As shown, this is a logic diagram illustrating the determination of whether the respirator status meets the standard based on dynamic inflation and respirator inflation rate in this embodiment, and the corresponding processing. The analysis unit is further used to determine whether the respirator status meets the standard at the current stage based on the comparison result of the dynamic inflation and the preset dynamic inflation, combined with the comparison result of the respirator inflation rate and the respirator inflation rate; wherein, if the dynamic inflation is greater than a first preset dynamic inflation and less than or equal to a second preset dynamic inflation, the respirator status at the current stage is re-determined based on the comparison result of the respirator inflation rate and the critical respirator inflation rate.

[0031] It is understood that in this embodiment, the subsequent adjustment of the gas flow control valve and pressure relief valve is performed under the condition that the intelligent gas supply ventilator is in the mask-controlled ventilation state. In order to analyze the judgment process more accurately, the preset dynamic filling degree D0 can be divided into the first preset dynamic filling degree D1 and the second preset dynamic filling degree D2, where D1 represents the warning buffer line and D2 represents the safety bottom line. In this embodiment, the maximum inflatable volume of a breathing bag is set to D3 = 2000ml, and D1 = 0.95 × D3 and D2 = 1.1 × D3 are set. The comparison process between the dynamic filling degree D and D1 and D2 is as follows: If D is less than or equal to D1, it indicates that the current level of the respirator's inflation has not yet reached the warning buffer line, and the corresponding dynamic inflation degree D is within the acceptable range. The respirator can still undergo subsequent inflation operations, therefore, the current respirator status can be determined to be compliant with standards. If D is greater than D1 and less than or equal to D2, it indicates that the current level of the respirator's inflation exceeds the warning buffer line but has not yet exceeded the safety baseline. The corresponding dynamic inflation degree D is between acceptable and unacceptable. In this case, it is impossible to accurately determine whether the current respirator status meets standards based on the changes in dynamic inflation degree D. Therefore, by introducing a new parameter, the respirator inflation rate N, a re-evaluation is conducted based on the changes in the respirator inflation rate N, in order to accurately determine the cause of the current abnormality and generate the corresponding handling method. Introducing a new parameter can avoid relying on a single-dimensional analysis and improve the accuracy of the judgment process by analyzing from multiple dimensions. If D is greater than D2, it indicates that the current level of the breathing bag is beyond the safety limit, and the corresponding dynamic inflation degree D is within the unqualified range. Therefore, it can be determined that the current breathing bag status does not meet the standard. The difference between D and D2 is calculated and recorded as the inflation degree difference E. Based on E, the corresponding handling method when it does not meet the standard is determined.

[0032] Please see Figure 4The diagram illustrates the logic for determining the cause of an abnormal breathing bag state and the corresponding processing based on the breathing bag inflation rate in this embodiment. The analysis unit is also used to determine flow rate adjustment based on the comparison between the breathing bag inflation rate and the critical breathing bag inflation rate. Specifically, if the breathing bag inflation rate is less than the critical breathing bag inflation rate, it is determined that the current inflation rate of the breathing bag is lower than expected, and the opening of the gas flow control valve is increased based on the inflation rate difference. The gas flow control valve is connected to the breathing circuit system. If the breathing bag inflation rate is greater than the critical breathing bag inflation rate, it is determined that the current inflation rate of the breathing bag is higher than expected, and the opening of the gas flow control valve is decreased based on the inflation rate offset. The inflation rate difference is the difference between the critical breathing bag inflation rate and the current breathing bag inflation rate, and the inflation rate offset is the difference between the breathing bag inflation rate and the critical breathing bag inflation rate.

[0033] It is understood that in this embodiment, the gas flow control valve can directly control the total amount of fresh gas entering the breathing circuit per unit time. When determining the abnormality of the breathing bag state by using the new parameter breathing bag inflation rate N, a critical breathing bag inflation rate N0 corresponding to N is set. Taking a normal adult as the subject, N0 can be set to 200 ml / s. The comparison process between N and N0 is as follows: If N is less than N0, it indicates that the current rate of gas flow into the respirator cannot meet the gas supply demand, and the respirator's inflation rate is lower than expected. In this case, the inflation rate N can be increased by increasing the opening of the gas flow control valve. In this embodiment, the gas flow control valve functions as both a fresh gas flow valve and a rapid oxygen supply valve. The gas supply rate is changed by adjusting the opening of the gas flow control valve in real time to adapt to the respirator's gas supply needs. If N is greater than N0, it indicates that the current rate of gas flow into the respirator far exceeds the respirator's capacity. Therefore, the opening of the gas flow control valve needs to be reduced to decrease the respirator inflation rate N. If N equals N0, it indicates that the current respirator inflation rate is normal, and the inflation rate meets or equals the expected rate. Even if the dynamic inflation rate D is judged as a potential risk state, the current gas supply parameters can still be maintained. The expected rate refers to the current inflation rate of the respirator meeting the corresponding anesthesia stage and the operating parameters of the gas supply anesthesia machine.

[0034] In this embodiment, when the patient is under mask-controlled assisted ventilation, by combining the dynamic inflation D of the breathing bag at the end of the patient's expiration (i.e. before inspiration) and obtaining the average inspiratory time and average expiratory time of the five most recent respiratory cycles before the current stage, it is determined to supplement the gas volume during the patient's inspiration with a fast first and then slow second, and dynamically adjust the inflation rate N of the breathing bag during the patient's expiration so that the breathing bag is basically inflated.

[0035] In other embodiments, the opening degree of the gas-driven control valve of the anesthesia machine can be adjusted to regulate the inflation rate N of the breathing bag. The gas flow control valve and the gas-driven control valve of the anesthesia machine essentially achieve precise control of the inflation / deflation rate of the breathing bag by adjusting the gas flow rate / pressure entering or acting on the system.

[0036] Specifically, the analysis unit is also used to determine the increase of the opening of the gas flow control valve based on the comparison result between the filling rate difference and the preset filling rate difference, and the increase of the gas flow control valve opening is positively correlated with the filling rate difference.

[0037] It is understood that in this embodiment, the respirator inflation rate N represents the speed at which the respirator is inflated by gas per unit time in the current stage. A smaller inflation rate N indicates a slower inflation speed, requiring a greater increase in the gas flow control valve opening to enable the respirator to reach the expected inflation level more quickly. Conversely, a smaller inflation rate N corresponds to a larger inflation rate difference J. Therefore, the increase in the gas flow control valve opening is positively correlated with the inflation rate difference J. A preset inflation rate difference J0 is set, corresponding to the inflation rate difference J. To more accurately determine the adjustment range of the gas flow control valve, the preset inflation rate difference J0 can be divided into a first preset inflation rate difference J1 and a second preset inflation rate difference J2, with J1 = 15 ml / s and J2 = 30 ml / s. The comparison process between J and J1 and J2 is as follows: If J is less than or equal to J1, the analysis unit generates a first control valve adjustment command, and the intelligent adjustment unit increases the opening of the gas flow control valve by 5% based on this command. If J is greater than J1 and less than or equal to J2, the analysis unit generates a second control valve adjustment command, and the intelligent adjustment unit increases the opening of the gas flow control valve by 8% based on this command. If J is greater than J2, the analysis unit generates a third control valve adjustment command, and the intelligent adjustment unit increases the opening of the gas flow control valve by 10% based on this command. It is understood that the increase in the gas flow control valve opening can also be other acceptable values, for example, increasing it by 12% when J is greater than J2. It should be noted that adjusting the gas flow control valve will not negatively affect the operation of the gas supply anesthesia machine.

[0038] Specifically, the analysis unit is also used to determine the reduction of the opening of the gas flow control valve based on the comparison result between the filling rate offset value and the preset filling rate offset value, and the reduction of the gas flow control valve opening is positively correlated with the filling rate offset value.

[0039] It is understood that in this embodiment, a larger breathing bag inflation rate N indicates a faster inflation speed, requiring a greater reduction in the gas flow control valve opening to prevent over-inflation or a sudden pressure surge. A larger inflation rate N also corresponds to a larger inflation rate offset M; therefore, the reduction in the gas flow control valve opening is positively correlated with the inflation rate offset M. A preset inflation rate offset value M0 is set to correspond to the inflation rate offset M. To more accurately determine the reduction adjustment range of the gas flow control valve, the preset inflation rate offset value M0 can be divided into a first preset inflation rate offset value M1 and a second preset inflation rate offset value M2, with M1 = 10 ml / s and M2 = 20 ml / s. The comparison process between M and M1 and M2 is as follows: If M is less than or equal to M1, the analysis unit generates a fourth control valve adjustment command, and the intelligent adjustment unit reduces the opening of the gas flow control valve by 6% based on this command. If M is greater than M1 and less than or equal to M2, the analysis unit generates a fifth control valve adjustment command, and the intelligent adjustment unit reduces the opening of the gas flow control valve by 11% based on this command. If M is greater than M2, the analysis unit generates a sixth control valve adjustment command, and the intelligent adjustment unit reduces the opening of the gas flow control valve by 15% based on this command. It is understood that the reduction in the opening of the gas flow control valve can also be other acceptable values, for example, a reduction of 16% when M is greater than M2.

[0040] Specifically, the analysis unit is also used to determine, based on the comparison result that the dynamic inflation degree is greater than the second preset dynamic inflation degree, that the current stage of the breathing bag state does not meet the standard and to trigger the safety intervention strategy; wherein, the safety intervention strategy includes issuing an alarm only and issuing an alarm and activating the pressure relief valve, the pressure relief valve being connected to the breathing circuit system.

[0041] In this embodiment, when the dynamic inflation degree D is greater than the second preset dynamic inflation degree D2, it is determined that the current stage of the breathing bag status does not meet the standard, and a corresponding multi-level safety intervention strategy is determined based on the comparison result of the inflation degree difference E and the critical inflation degree difference E0. The multi-level safety intervention strategy includes simply issuing an alarm, as well as issuing an alarm and activating the pressure relief valve at the same time. The alarm form can be an audible and visual alarm, and the alarm prompts manual verification plus automatic pressure relief in a "human-machine collaboration" mode, which is in line with the redundant safety design of medical equipment.

[0042] Specifically, the analysis unit is further used to determine the safety intervention strategy based on the comparison result between the fullness difference and the critical fullness difference; wherein, if the fullness difference is less than or equal to the critical fullness difference, the safety intervention strategy is determined to be to issue an alarm only; if the fullness difference is greater than the critical fullness difference, the safety intervention strategy is determined to be to issue an alarm while activating the pressure relief valve; the fullness difference is the difference between the dynamic fullness and the second preset dynamic fullness.

[0043] In this embodiment, the difference between the dynamic fullness D and the second preset dynamic fullness D2 is calculated and recorded as the fullness difference E. A critical fullness difference E0 corresponding to the fullness difference E is set, and E0 = 100ml. The comparison process based on E and E0 is as follows: If E is less than or equal to E0, it indicates that the dynamic inflation of the respirator is slightly exceeding the limit at this stage. In this case, manual intervention is initiated by issuing an alarm. If E is greater than E0, it indicates that the dynamic inflation of the respirator is severely exceeding the limit at this stage. In this case, the pressure relief valve is activated simultaneously with issuing an alarm. The safety intervention strategy is dynamically selected based on the change in the inflation difference E.

[0044] Please see Figure 5As shown, this is the logic diagram for determining the opening degree of the pressure relief valve based on the intervention duration in this embodiment. The analysis unit is also used to execute a proportional control to open the pressure relief valve when the pressure relief valve is activated, wherein the proportional control is determined based on the pressure relief filling degree difference or the comparison result of the intervention duration and the critical intervention duration; the pressure relief filling degree difference is a new filling degree difference obtained by continuous monitoring after the pressure relief valve has been activated for a period of time; the intervention duration is the duration during which the filling degree difference is continuously monitored to be greater than the critical filling degree difference within a preset duration of the pressure relief valve activation.

[0045] In this embodiment, when the pressure relief valve is activated, its opening degree increases gradually over time to avoid abrupt pressure relief that could interrupt ventilation. The opening degree increases from 1% to 100%, with an opening rate set at 40% / minute. This opening rate can be adjusted according to changes in the patient's physiological parameters; this is existing technology and will not be elaborated here. The analysis unit continuously monitors the pressure relief valve for a period of time after activation to obtain a new filling degree difference, which is recorded as the pressure relief filling degree difference R. R is then compared with E0. R is obtained 6 seconds after the pressure relief valve is activated. If R is less than or equal to E0, it indicates that the dynamic filling degree of the respirator is slightly exceeding the limit at the current stage, and the pressure relief valve is closed, requiring manual intervention only through an alarm. If R is still greater than E0, the cumulative duration of R being greater than E0 is recorded as the intervention duration H. A critical intervention duration H0 corresponding to H is set, with H0 = 2.5s. The comparison process between H and H0 is as follows: If H is less than or equal to H0, it indicates that the duration of R being greater than E0 is relatively short, and the gas in the breathing bag is discharged relatively smoothly. The pressure relief valve is opened step by step according to the original opening degree. If H is greater than H0, it indicates that the duration of R being greater than E0 is relatively long, and the gas in the breathing bag is more difficult to discharge. At this time, the analysis unit generates a pressure relief valve adjustment command. Based on this command, the intelligent adjustment unit determines that the current opening ratio of the pressure relief valve is 100% to avoid physical damage to the breathing bag due to over-inflation and to prevent high-pressure gas from continuously entering the patient's airway, thus avoiding barotrauma (such as pneumothorax).

[0046] It is understood that in this embodiment, after the pressure relief valve opens at a certain ratio to release gas, the original amount of gas in the breathing bag decreases, thus increasing the limit that the breathing bag can withstand. That is, the critical breathing bag inflation rate N0 after pressure relief should be greater than the critical breathing bag inflation rate N0 before pressure relief. The critical breathing bag inflation rate N0 after pressure relief can be dynamically increased based on the opening degree of the pressure relief valve. The increase in the critical breathing bag inflation rate N0 after pressure relief is positively correlated with the opening degree B of the pressure relief valve. A preset pressure relief valve opening degree B0 corresponding to the opening degree B of the pressure relief valve is set. To more accurately determine the increase in the critical breathing bag inflation rate N0 after pressure relief, the preset pressure relief valve opening degree B0 can be divided into a first preset pressure relief valve opening degree B1 and a second preset pressure relief valve opening degree B2. B1 can be set to 35%, and B2 to 55%. The comparison process between B and B1 and B2 is as follows: If B is less than or equal to B1, a first inflation rate adjustment command is generated by the analysis unit, and the original critical bag inflation rate N0 is increased by 5% based on this command. If B is greater than B1 and less than or equal to B2, a second inflation rate adjustment command is generated by the analysis unit, and the original critical bag inflation rate N0 is increased by 10% based on this command. If B is greater than B2, a third inflation rate adjustment command is generated by the analysis unit, and the original critical bag inflation rate N0 is increased by 15% based on this command. It is understood that the increase can also be set to other acceptable values; for example, when B is greater than B2, the original critical bag inflation rate N0 can be increased by 14%. It should be noted that increasing the critical bag inflation rate N0 will not negatively affect the bag condition or the patient.

[0047] It is understood that no specific limitation is made to any preset parameter or critical parameter in the embodiments of the present invention, and the above values ​​are not limited thereto. Those skilled in the art can make corresponding adjustments to the preset parameters or critical parameters according to actual needs, analysis of historical data, or equipment usage.

[0048] The technical solution of the present invention has been described above with reference to the preferred embodiments shown in the accompanying drawings. However, it will be readily understood by those skilled in the art that the scope of protection of the present invention is obviously not limited to these specific embodiments. Without departing from the principles of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will all fall within the scope of protection of the present invention.

[0049] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. An intelligent gas supply anesthesia machine based on dynamic monitoring of physical morphology, characterized in that, include: A breathing circuit system, which includes a breathing bag for adjusting breathing pressure and volume through elastic recoil; The status monitoring unit includes sensors for real-time information acquisition of the breathing bag to obtain three-dimensional data information corresponding to the breathing bag, wherein the three-dimensional data information includes three-dimensional coordinate point cloud data. The model building unit is connected to the state monitoring unit and is used to build a three-dimensional model of the breathing bag in three-dimensional space according to the three-dimensional data information. Based on the model, it performs real-time calculations and outputs dynamic deformation state parameters that characterize the physical shape of the breathing bag. The dynamic deformation state parameters include dynamic inflation degree and breathing bag inflation rate. An analysis unit, which is connected to the model building unit, is used to compare and determine whether the current state of the breathing bag meets the standard based on the dynamic filling degree and the breathing bag filling rate, combined with a preset threshold corresponding to the working state of the intelligent gas supply anesthesia machine. The intelligent adjustment unit, connected to the analysis unit, adjusts the flow rate or triggers a safety intervention strategy to adjust the opening of the pressure relief valve based on the current stage of the respirator status determination result and the change in the respirator inflation rate.

2. The intelligent gas supply anesthesia machine based on dynamic monitoring of physical morphology according to claim 1, characterized in that, The working states of the intelligent gas supply anesthesia machine include mechanically controlled ventilation state, mechanically assisted ventilation state, spontaneous breathing state, and manually controlled ventilation state. Based on different working states, corresponding preset thresholds are determined, including preset dynamic filling degree and critical breathing bag filling rate. The dynamic inflation rate is the percentage of the actual inflation volume of the respirator in the current stage to the maximum inflatable volume, and the respirator inflation rate is the rate at which the respirator is inflated with gas in the current stage changes over time.

3. The intelligent gas supply anesthesia machine based on dynamic monitoring of physical morphology according to claim 2, characterized in that, The analysis unit is also used to determine whether the current state of the breathing bag meets the standard based on the comparison result of the dynamic inflation degree and the preset dynamic inflation degree, combined with the comparison result of the breathing bag inflation rate and the breathing bag inflation rate. If the dynamic inflation degree is greater than the first preset dynamic inflation degree and less than or equal to the second preset dynamic inflation degree, the current state of the breathing bag is re-determined based on the comparison result between the breathing bag inflation rate and the critical breathing bag inflation rate.

4. The intelligent gas supply anesthesia machine based on dynamic monitoring of physical morphology according to claim 3, characterized in that, The analysis unit is also used to determine flow rate adjustment based on the comparison result between the breathing bag inflation rate and the critical breathing bag inflation rate. If the inflation rate of the breathing bag is less than the critical inflation rate of the breathing bag, it is determined that the inflation rate of the breathing bag in the current stage is lower than expected, and the opening of the gas flow control valve is increased based on the inflation rate difference. The gas flow control valve is connected to the breathing circuit system. If the inflator rate of the breathing bag is greater than the critical inflator rate of the breathing bag, it is determined that the inflator rate of the breathing bag in the current stage is higher than expected, and the opening of the gas flow control valve is reduced based on the inflator rate offset value. The inflation rate difference is the difference between the critical respirator inflation rate and the respirator inflation rate, and the inflation rate offset is the difference between the respirator inflation rate and the critical respirator inflation rate.

5. The intelligent gas supply anesthesia machine based on dynamic monitoring of physical morphology according to claim 4, characterized in that, The analysis unit is also used to determine the increase of the opening of the gas flow control valve based on the comparison result between the filling rate difference and the preset filling rate difference. The increase in the opening of the gas flow control valve is positively correlated with the filling rate difference.

6. The intelligent gas supply anesthesia machine based on dynamic monitoring of physical morphology according to claim 4, characterized in that, The analysis unit is also used to determine the reduction of the opening of the gas flow control valve based on the comparison result between the filling rate offset value and the preset filling rate offset value. The reduction of the gas flow control valve opening is positively correlated with the filling rate offset value.

7. The intelligent gas supply anesthesia machine based on dynamic monitoring of physical morphology according to claim 3, characterized in that, The analysis unit is also used to determine, based on the comparison result that the dynamic inflation degree is greater than the second preset dynamic inflation degree, that the current stage of the breathing bag status does not meet the standard and to trigger the safety intervention strategy. The safety intervention strategies include issuing an alarm only and issuing an alarm and activating a pressure relief valve, which is connected to the breathing circuit system.

8. The intelligent gas supply anesthesia machine based on dynamic monitoring of physical morphology according to claim 7, characterized in that, The analysis unit is also used to determine the safety intervention strategy based on the comparison results between the fullness difference and the critical fullness difference; If the fullness difference is less than or equal to the critical fullness difference, then the security intervention strategy is determined to be issuing only an alarm. If the filling degree difference is greater than the critical filling degree difference, then the safety intervention strategy is determined to be to issue an alarm and activate the pressure relief valve; The fullness difference is the difference between the dynamic fullness and the second preset dynamic fullness.

9. The intelligent gas supply anesthesia machine based on dynamic monitoring of physical morphology according to claim 8, characterized in that, The analysis unit is also used to perform a control of the opening degree of the pressure relief valve according to the control ratio when the pressure relief valve is activated, wherein the control ratio is determined based on the pressure relief filling degree difference or the comparison result of the intervention time and the critical intervention time; The pressure relief filling difference is a new filling difference value obtained by continuous monitoring after the pressure relief valve has been activated for a period of time. The intervention duration is the duration during which the filling degree difference is continuously monitored to be greater than the critical filling degree difference within a preset time period after the pressure relief valve is activated.

10. The intelligent gas supply anesthesia machine based on dynamic monitoring of physical morphology according to claim 2, characterized in that, The analysis unit is also used to acquire the patient's physiological parameters and combine them with the preset dynamic inflation degree and the critical breathing bag inflation rate corresponding to different working states of the intelligent gas supply anesthesia machine, and to adjust the critical breathing bag inflation rate based on the opening of the pressure relief valve.

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