A gas control system

Abstract

The present invention relates to a gas control system, characterized in that it comprises: an oxygen supply module for providing oxygen; a mixing module for mixing oxygen with air and / or exhaled gas; an exchange module for exchanging the mixed gas with the human respiratory system; the oxygen supply module can pass oxygen into the first mixing chamber or the second mixing chamber of the mixing module, and the mixing module can at least mix the internal gas into a gas to be inhaled containing a preset concentration of oxygen; the mixing module and the exchange module are connected through a circulation loop. The system reuses the underutilized oxygen in the exhaled gas of the human body through the circulation loop to save controllable oxygen resources; and the mixing chambers of the mixing module of the present application can work alternately to ensure the continuity and stability of ventilation.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and in particular to a gas control system, a gas control system for a ventilator, a respiratory gas control system capable of switching gas sources, and a respiratory gas control system capable of recycling gas. Background Art

[0002] A ventilator is a crucial medical device that can prevent and treat respiratory failure, reduce complications, and save and extend the lives of patients. In modern clinical medicine, as an effective means to artificially replace the function of autonomous ventilation, it has been widely used in respiratory failure caused by various reasons, anesthesia respiratory management during major surgeries, respiratory support treatment, and first aid resuscitation, and occupies a very important position in the field of modern medicine. A ventilator can provide oxygen for patients through high-pressure gas cylinders and help patients without breathing, suffering from respiratory failure, or experiencing sudden dyspnea with pulmonary ventilation. The ventilator and the oxygen introduced into the patient's body through the ventilator are scarce medical resources in the medical field.

[0003] In the prior art, a respiratory oxygen supply method, a respiratory oxygen supply device, a respiratory oxygen supply equipment, an oxygen generator, and a ventilator proposed in a patent document with the publication number CN115068758A. The respiratory oxygen supply method includes: obtaining changes in the user's respiratory characteristics; determining an oxygen supply flow strategy based on the changes in the user's respiratory characteristics, and the oxygen supply flow strategy includes determining the magnitude of the oxygen supply flow per unit time; adjusting the oxygen supply flow according to the oxygen supply flow strategy.

[0004] In the prior art, a respiratory following oxygen supply structure and a respiratory following oxygen supply system proposed in a patent document with the publication number CN114534040A. The respiratory following oxygen supply structure includes a main pipeline, a first branch pipe, and a second branch pipe. One end of the main pipeline forms an oxygen interface for connecting to a continuous oxygen generator to input oxygen, and a flow rate regulating device is installed in the main pipeline; one end of the first branch pipe, one end of the second branch pipe, and the other end of the main pipeline are interconnected pairwise. The other end of the first branch pipe forms an oxygen outlet for outputting oxygen, and a first one-way valve is installed in the first branch pipe. The first one-way valve is configured to conduct in the direction from the oxygen interface to the oxygen outlet. The other end of the second branch pipe is connected to an airbag for caching oxygen, and the airbag is configured to change its volume by the movement between the bladder walls. The respiratory following oxygen supply system includes the respiratory following oxygen supply structure.

[0005] As described above, the existing air supply and oxygen supply devices of ventilators are usually directly connected to the human respiratory system, or the provided oxygen and air are mixed and then directly introduced into the human respiratory system, and the gas exhaled by the human respiratory system is discharged into the air. However, the utilization rate of oxygen in the oxygen-containing gas with a specific concentration introduced into the human respiratory system is only about fifty percent. That is, for a stream of oxygen-containing gas, when it enters the respiratory system from the human respiratory tract to perform corresponding work and then is exhaled from the respiratory system, about fifty percent of the oxygen in the exhaled gas at the original concentration is not utilized by the respiratory system. However, based on the existing technical solutions, this about fifty percent of oxygen is directly discharged into the air, making this part of the oxygen change from a controllable state to an uncontrollable state when it mixes into the atmosphere, resulting in a waste of medical resources. In addition, for the oxygen supply device that provides oxygen for the ventilator, it usually uses a compressed high-pressure oxygen source. When in use, the oxygen in the high-pressure oxygen source is mixed with air to a certain oxygen concentration, and then the gas with this oxygen concentration is introduced into the human body. However, the oxygen content in the high-pressure oxygen source per unit time or unit space is relatively high, which is not conducive to accurately adjusting the oxygen content.

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

[0007] In view of the deficiencies of the prior art that the proposed technical solutions cannot effectively save oxygen and are not conducive to precisely adjusting the content of mixed oxygen, the present application proposes a gas control system, which includes: an oxygen supply module for providing oxygen; a mixing module for mixing oxygen with air and / or exhaled gas; and an exchange module for performing gas exchange between the mixed gas and the human respiratory system. The oxygen supply module can introduce oxygen into the first mixing chamber or the second mixing chamber of the mixing module. The mixing module can at least mix the internal gas into the inhaled gas containing a preset concentration of oxygen. The mixing module and the exchange module are connected through a circulation loop, where the circulation loop at least includes an inhalation pipeline and an exhalation pipeline. The circulation loop is connected to the air outlet channels of the first mixing chamber and the second mixing chamber through an adapter, and the adapter connects the exchange module to different mixing chambers by opening different connection channels according to a preset rule. The so-called preset rule is determined by the processing module. The specific determination basis is to judge the gas volume and gas concentration in the first mixing chamber and the second mixing chamber. Specifically, the gas in the mixing chamber is monitored by an oxygen sensor and a pressure sensor. When the gas pressure in one of the mixing chambers is insufficient, it indicates that the gas in this mixing chamber is about to be exhausted, and at this time, it is necessary to switch to the other mixing chamber. For one of the mixing chambers where mixing is taking place, the processing module needs to judge whether the oxygen content and gas pressure in the mixed gas in the mixing chamber are within the preset standard, and only when they are within the preset standard can it be switched from this mixing chamber to another mixing chamber.

[0008] The existing gas supply and oxygen supply equipment of ventilators is usually directly connected to the human respiratory system, or the provided oxygen and air are mixed and then introduced into the human respiratory system, and the exhaled gas of the human respiratory system is discharged into the air. The human respiratory system is the general term for the organs that perform gas exchange between the human body and the outside world. The main function of the human respiratory system is to perform gas exchange with the outside world, exhale carbon dioxide, inhale fresh oxygen, and complete the renewal of gas. The human respiratory system includes the respiratory tract (nasal cavity, pharynx, larynx, trachea, bronchi) and the lungs. However, the utilization rate of oxygen in the oxygen-containing gas with a specific concentration introduced into the human respiratory system is only about fifty percent. That is, for a wisp of oxygen-containing gas, when it enters the respiratory system from the human respiratory tract to perform corresponding work and then is exhaled from the respiratory system, about fifty percent of the oxygen in the original concentration in the exhaled gas is not utilized by the respiratory system. However, based on the existing technical solutions, this about fifty percent of oxygen is directly discharged into the air, making this part of the oxygen change from a controllable state to an uncontrollable state when it is mixed into the atmosphere, resulting in a waste of medical resources.

[0009] Based on the above defects, the present application collects the gas exhaled by the human respiratory system at the exchange module and contains about 50% of the original oxygen concentration and passes it into the mixing module through the exhalation circuit between the exchange module and the mixing module for recycling, thus avoiding the direct discharge of gas containing a certain amount of oxygen into the atmosphere.

[0010] In addition, the circulation loop of the present application is connected to the outlet channels of the first mixing chamber and the second mixing chamber through an adapter. Furthermore, when there are two mixing chambers, the two mixing chambers need to alternately introduce the gas to be inhaled into the exchange module, and for the gas introduced into the exchange module within a period of time, it is necessary to maintain the same flow rate and pressure. The conventional gas interface switching method usually adopts the method of first closing one of the pipelines and then opening the other pipeline for switching. It takes a certain amount of time from closing one pipeline to opening another pipeline, and the flow rate and pressure of the gas will fluctuate to a certain extent. This fluctuation may cause serious consequences for emergency patients or special patients. For example, patients who need lung re-expansion need to use mechanical ventilation to assist patients in breathing during the rescue process in the emergency room. During the mechanical ventilation process, a pressure or volume higher than the conventional mean airway pressure is intermittently given and maintained for a certain period of time to allow the collapsed alveoli to be re-expanded. After relieving the life-threatening danger, for patients with alveolar collapse, it is still necessary to continue to introduce gas according to specific mechanical ventilation parameters for a period of time after rescue. In the above two processes requiring mechanical ventilation, as described above, it takes a certain amount of time for the mixing module of the present application to mix the gases, or there is a ventilation disconnection interval when the two mixing chambers are switched. The time interval may cause the patient to have a risk of secondary alveolar collapse.

[0011] Thus, the adapter connects the mixing module to different gas sources by opening different connection channels according to the above-mentioned preset rules, so that the gas flow from the mixing module into the exchange module remains in a stable flow state within the preset time. The respiratory system of the present application can solve the defects of unstable continuous ventilation and intermittent ventilation when switching is required. Through the design of the adapter and mixing chamber of the present application, it is possible to avoid the problem that part of the oxygen introduced into the patient's respiratory system by the traditional ventilator cannot be effectively utilized, resulting in a waste of oxygen resources, and it is possible to ensure that the ventilation rate, pressure and ventilation volume of the different mixing chambers of the exchange module and the mixing module that introduce gas into the patient's body will not fluctuate during the switching, so that it can be suitable for various scenarios requiring mechanical ventilation, especially scenarios with specific requirements for the continuity and continuity of ventilation.

[0012] Preferably, the circulation loop at least includes an intake pipeline and an exhalation pipeline. The intake pipeline is used to introduce the gas to be inhaled in the mixing module into the exchange module. The exhalation pipeline is used to introduce the gas exhaled by the human respiratory system from the exchange module back into the mixing module again. In this way, the intake pipeline can obtain fresh gas from the mixing module for breathing, and the exhalation pipeline can recover the unconsumed oxygen in the exhaled gas to make full use of the prepared oxygen.

[0013] Preferably, a humidifier for humidifying the gas to be inhaled is provided on the intake pipeline, and a third monitor is also provided between the humidifier on the intake pipeline and the exchange module. The third monitor is used to monitor the flow rate, flow volume, and humidity of the gas to be inhaled in the intake pipeline. Specifically, the third monitor is arranged between the humidifier on the intake pipeline and the exchange module to facilitate the monitoring of the humidified gas to be inhaled and accurately monitor the humidity of the gas to be inhaled.

[0014] Preferably, a purifier for purifying the exhaled gas of the human body is provided on the exhalation pipeline, and a fourth monitor is also provided between the purifier on the exhalation pipeline and the mixing module. The fourth monitor is used to monitor the flow rate, flow volume, and components of the exhaled gas in the respiratory pipeline. Specifically, the fourth monitor is arranged between the purifier on the exhalation pipeline and the mixing module to facilitate the monitoring of the purified exhaled gas and accurately monitor whether the gas contains viruses, bacteria, etc.

[0015] Preferably, one of the first mixing chamber and the second mixing chamber in the mixing module is in a mixed gas state, and the other is in an output gas state, and the working states of the first mixing chamber and the second mixing chamber are alternately switched. It takes a certain amount of time to mix oxygen, air, and exhaled gas using the mixing chamber. For patients who need continuous ventilation, their ventilation cannot be intermittent, and they must maintain a certain breathing frequency to continuously ventilate into the patient's body. Therefore, the technical solution of simply using one mixing chamber for mixing and ventilation cannot fully meet the requirements. Based on this, at least two mixing chambers are provided in the mixing module of the present application, and the two mixing chambers alternately perform gas mixing and gas replenishment. Thus, the mixed gas state of the mixing chamber means that the mixing chamber is currently in the working state of mixing gas, and the output gas state of the mixing chamber means that the mixing chamber is currently in the working state of transporting gas.

[0016] Preferably, the intake pipeline can be alternately connected to the first mixing chamber and the second mixing chamber, and the exhalation pipeline can be alternately connected to the first mixing chamber and the second mixing chamber. Among them, the intake pipeline and the exhalation pipeline can only be individually connected to one of the mixing chambers. That is, the intake pipeline is always connected to the mixing chamber in the state of outputting gas, and the exhalation pipeline is always connected to the mixing chamber in the state of mixed gas. In this way, the intake pipeline can be continuously and uninterruptedly supplied with gas, and the gas exhaled from the exhalation pipeline can be continuously and uninterruptedly collected, avoiding the problem that a single mixing chamber cannot output gas and receive gas during the gas mixing process.

[0017] Preferably, the oxygen supply module includes at least a high-pressure oxygen source and a low-pressure oxygen source. The high-pressure oxygen source and the low-pressure oxygen source can jointly and / or individually introduce oxygen into the mixing module. Among them, the high-pressure oxygen source and the low-pressure oxygen source are synchronously connected to the same mixing chamber. The oxygen supply module is always connected to the mixing chamber in the state of mixed gas. In this way, when the oxygen concentration in the mixing module is close to the preset concentration, the oxygen supply module is switched from the high-pressure oxygen source to the low-pressure oxygen source. The oxygen pressure of the low-pressure oxygen source is small and the oxygen content per unit volume is low, so as to facilitate the control of the oxygen content input into the mixing module, fully ensure that the oxygen concentration in the mixed gas is at the preset concentration, and avoid abnormal operation of the patient's respiratory system caused by oxygen concentration errors, such as oxygen poisoning caused by too high oxygen concentration and respiratory obstruction caused by too low oxygen concentration.

[0018] Preferably, the system further includes a processing module, which is connected to the control device and / or the acquisition device in the system, and can adjust the working state of the control device based on the feedback information of the acquisition device. In this way, the system can achieve automatic monitoring and adjustment, reduce the labor burden, and improve the convenience and practicality.

[0019] Preferably, the acquisition device includes a first monitor, a second monitor, a third monitor, and a fourth monitor. Among them, the monitors are arranged between each pipeline; the acquisition device further includes an oxygen sensor and a pressure sensor, and the oxygen sensor and the pressure sensor are arranged inside the mixing chamber of the mixing module. The acquisition device provides real-time data for the processing module of the system, so as to facilitate the processing module to adjust the following control devices.

[0020] Preferably, the control device includes a first control valve and a second control valve. Among them, the first control valve is arranged in the high-pressure oxygen source, and the second control valve is arranged in the low-pressure oxygen source; the control device further includes a first fan blade, a second fan blade, an output pump, and an input pump. The first fan blade and the second fan blade are arranged in the mixing chamber inside the mixing module, which is used to mix gas. The output pump is also arranged in the mixing chamber, which is used to output gas, and the input pump is arranged in the exhalation pipeline. Description of the Drawings

[0021] Figure 1 is a simplified overall structural schematic diagram of the gas control system of the present invention based on the gas flow direction;

[0022] Figure 2 is a simplified side view structural schematic diagram of the mixing module of the gas control system of the present invention;

[0023] Figure 3 is a simplified front view structural schematic diagram of the mixing module of the gas control system of the present invention;

[0024] Figure 4 is a simplified structural schematic diagram of the adapter of the gas control system of the present invention;

[0025] Figure 5 is a simplified structural schematic diagram of the information transmission of the gas control system of the present invention.

[0026] List of Reference Numerals

[0027] 100: oxygen supply module; 200: mixing module; 300: exchange module; 400: processing module; 500: adapter; 101: high-pressure oxygen source; 102: low-pressure oxygen source; 103: first control valve; 104: second control valve; 105: first monitor; 106: second monitor; 107: high-pressure oxygen pipe; 108: low-pressure oxygen pipe; 201: first mixing chamber; 202: second mixing chamber; 203: first suction outlet; 204: first high-pressure oxygen interface; 205: first low-pressure oxygen interface; 206: first exhalation inlet; 207: second suction outlet; 208: second high-pressure oxygen interface; 209: second low-pressure oxygen interface; 210: second exhalation inlet; 211: oxygen sensor; 212: pressure sensor; 213: output pump; 214: first fan blade; 215: second fan blade; 220: first channel; 230: second channel; 301: circulation loop; 302: intake pipeline; 303: exhalation pipeline; 304: input pump; 305: humidifier; 306: purifier; 307: third monitor; 308: fourth monitor; 501: transfer track; 502: transfer interface; 503: transfer channel; 504: drive element. Detailed Embodiments

[0028] The following will describe the present invention in detail with reference to the appended Figures 1 - 5 drawings.

[0029] Embodiment 1

[0030] Figure 1The figure shows a simplified overall structural schematic diagram of a gas control system according to the present application, including at least: an oxygen supply module 100 for supplying oxygen; a mixing module 200 for mixing oxygen with air; and an exchange module 300 for performing gas exchange with the human respiratory system.

[0031] Preferably, the mixing module 200 can at least mix the oxygen provided by the oxygen supply module 100 with the exhaled gas returned by the exchange module 300 to a preset concentration.

[0032] In existing ventilators, the gas supply and oxygen supply devices are usually directly connected to the human respiratory system, or the provided oxygen and air are mixed and then directly introduced into the human respiratory system, and the gas exhaled by the human respiratory system is discharged into the air. However, the utilization rate of oxygen in the oxygen-containing gas with a specific concentration introduced into the human respiratory system is only about fifty percent. That is, for a stream of oxygen-containing gas, when it enters the respiratory system from the human airway to perform corresponding work and then is exhaled from the respiratory system, about fifty percent of the oxygen in the exhaled gas at the original concentration is not utilized by the respiratory system. However, based on the existing technical solutions, this about fifty percent of oxygen is directly discharged into the air, making this part of the oxygen change from a controllable state to an uncontrollable state when it mixes into the atmosphere, resulting in a waste of medical resources.

[0033] Based on the above defects, the present application circulates and utilizes the gas containing about fifty percent of the oxygen at the original concentration exhaled by the human respiratory system collected at the exchange module 300 through the exhalation circuit between the exchange module 300 and the mixing module 200 into the mixing module 200, avoiding directly discharging the gas containing a certain amount of oxygen into the atmospheric space.

[0034] Preferably, at least a circulation circuit 301 is provided between the mixing module 200 and the exchange module 300. The circulation circuit 301 at least includes an inhalation pipeline 302 for introducing the inhaled gas mixed to the preset concentration from the mixing module 200 into the exchange module 300 and further into the human respiratory system.

[0035] Preferably, the circulation circuit 301 at least further includes an exhalation pipeline 303 for introducing the gas exhaled by the human respiratory system from the exchange module 300 back into the mixing module 200.

[0036] Preferably, the preset concentration refers to the oxygen concentration of the gas after being evenly mixed by the mixing module 200. The preset oxygen concentration adjustment range is usually between 21% - 90%. Specifically, the required oxygen concentration for different diseases is not the same. Generally, the oxygen content in the air is about 21%. For patients with respiratory disorders such as chronic obstructive pulmonary disease (COPD) and emphysema, the body's metabolic demand for oxygen is insufficient in a normal environment, and a ventilator is needed for improvement. At this time, the preset concentration of the ventilator can be adjusted to about 35% according to the need; if the patient has acute respiratory failure and requires endotracheal intubation or a non-invasive ventilator, the preset oxygen concentration can reach more than 50%; for patients with carbon monoxide poisoning, cerebral hemorrhage, and sensorineural deafness, they need to inhale hyperbaric oxygen in a hyperbaric oxygen chamber.

[0037] Preferably, the mixing module 200 is provided with at least one mixing chamber. The inside of the mixing chamber includes at least a number of fan blades disposed on the side walls inside the mixing chamber. Further, at least two opposite inner side walls of the mixing chamber are provided with a first fan blade 214 and a second fan blade 215 relatively. The first fan blade 214 and the second fan blade 215 can cause the gas on both sides to generate a convection movement by rotating, so that the gas introduced into the mixing chamber is fully and evenly mixed.

[0038] Preferably, the inside of the mixing chamber further includes an oxygen sensor 211 for measuring the oxygen concentration. The oxygen sensor 211 utilizes the Nernst principle, and its core component is a porous ZrO 2 ceramic tube, which is a solid electrolyte. Porous platinum electrodes are sintered on both sides respectively. At a certain temperature, due to different oxygen concentrations on both sides, oxygen molecules on the high-concentration side (the inner side of the ceramic tube) are adsorbed on the platinum electrode and combined with electrons to form oxygen ions, making this electrode positively charged. The oxygen ions migrate through the oxygen ion vacancies in the electrolyte to the low-oxygen concentration side, making this electrode negatively charged, that is, generating a potential difference, thereby detecting the oxygen concentration.

[0039] Preferably, the inside of the mixing chamber further includes a barometric pressure sensor 212 for measuring the pressure of the mixed gas. The main sensing element of the barometric pressure sensor 212 is a thin film sensitive to the strength of the barometric pressure and a thimble for control. In terms of the circuit, it is connected to a flexible resistor. When the pressure of the measured gas decreases or increases, this thin film deforms to drive the thimble, and at the same time the resistance value of this resistor will change.

[0040] Preferably, the outside of the mixing chamber includes at least one exhalation inlet, which is connected to one end of the exhalation pipeline 303 in the circulation loop 301 connecting the mixing module 200 and the exchange module 300. The other end of the exhalation pipeline 303 is connected to the exchange module 300. Thus, the exchange module 300 passes the gas exhaled from the human respiratory system into the mixing chamber through the exhalation inlet.

[0041] Preferably, there are at least several oxygen interfaces outside the mixing chamber. One end of at least one oxygen supply pipeline between the oxygen supply module 100 and the mixing module 200 is connected to at least one oxygen interface, so as to introduce oxygen into the mixing chamber from the oxygen interface of the mixing chamber.

[0042] Preferably, there is at least one air suction outlet outside the mixing chamber. The air suction outlet is connected to one end of the air suction pipeline 302 in the circulation loop 301 connecting the mixing module 200 and the exchange module 300. The other end of the air suction pipeline 302 is connected to the exchange module 300, so that the mixing module 200 transports the inhalable gas mixed to a preset concentration to the exchange module 300, and further conducts gas exchange with the human respiratory system through the exchange module 300.

[0043] Preferably, there is at least one pump inlet for pumping air outside the mixing chamber (not shown in the figure). The pump inlet is a one-way port and can pump the required air from the atmospheric space outside the mixing chamber. The advantage of setting the pump inlet as a one-way port is that it can ensure that the gas in the mixing chamber can only flow out from the air suction outlet, avoid gas leakage and the change of air pressure in the mixing chamber.

[0044] Preferably, an output pump 213 can be arranged at the air suction outlet of the mixing chamber to pump the mixed gas with a preset concentration into the breathing pipeline, so as to facilitate the delivery of the inhalable gas into the human respiratory system.

[0045] Preferably, a humidifier 305 and a purifier 306 are also arranged on the circulation loop 301 between the mixing module 200 and the exchange module 300. Among them, the humidifier 305 is arranged on the air suction pipeline 302 of the circulation loop 301 to humidify the gas about to enter the human respiratory system and avoid gas dryness; the purifier 306 is arranged on the exhalation pipeline 303 of the circulation loop 301 to treat the possible viruses and / or bacteria exhaled from the human respiratory system and avoid the secondary entry of viruses into the patient's body.

[0046] Through the above solution, the gas control system of the present application can at least continuously supply an appropriate concentration of oxygen-containing gas to patients who need mechanical ventilation, ensuring the gas demand of the human respiratory system. In addition, in view of the defect that the human respiratory system can only utilize 50% of the oxygen in the inhaled oxygen-containing gas, and about 50% of the gas is directly discharged into the atmosphere from the body in the form of exhaled gas from the human respiratory system, turning controllable oxygen into uncontrollable oxygen, the present application sets a circulation loop 301 between the mixing module 200 and the exchange module 300, which can not only transport the gas to be inhaled from the mixing module 200 to the exchange module 300 and further into the human respiratory system, but also transport the exhaled gas from the respiratory system back to the mixing module 200. The exhaled gas introduced into the mixing module 200 is further mixed with the oxygen provided by the oxygen supply module 100 to become the gas to be inhaled that can be inhaled again, thus avoiding the waste of oxygen in the exhaled gas.

[0047] Embodiment 2

[0048] This embodiment is an improvement and supplement based on Embodiment 1, and the repeated content will not be elaborated.

[0049] This embodiment provides a preferred implementation of a gas control system capable of switching gas sources.

[0050] Preferably, according to Figure 1 , the oxygen supply module 100 of the present application includes at least a high-pressure oxygen source 101 and a low-pressure oxygen source 102.

[0051] For an oxygen supply device that supplies oxygen to a ventilator, it usually uses a compressed high-pressure oxygen source 101. During use, the oxygen in the high-pressure oxygen source 101 is mixed with air to a certain oxygen-containing concentration, and then the gas with this oxygen-containing concentration is introduced into the human body. However, the oxygen content in the high-pressure oxygen source 101 per unit time or unit space is relatively high, which is not conducive to accurately adjusting the oxygen content.

[0052] Therefore, when the oxygen concentration in the mixing module 200 of the present application is close to the preset concentration, the oxygen supply module 100 is switched from the high-pressure oxygen source 101 to the low-pressure oxygen source 102. The oxygen pressure of the low-pressure oxygen source 102 is small and the oxygen content per unit volume is low, so as to facilitate the control of the oxygen content input into the mixing module 200, fully ensure that the oxygen concentration in the mixed gas is at the preset concentration, and avoid abnormal operation of the patient's respiratory system caused by oxygen concentration errors, such as oxygen poisoning caused by too high oxygen concentration and respiratory obstruction caused by too low oxygen concentration.

[0053] Preferably, when a high-pressure oxygen source 101 and a low-pressure oxygen source 102 are provided in the oxygen supply module 100, at least two oxygen interfaces are included on one mixing chamber of the mixing module 200, one of which is a high-pressure oxygen interface and the other is a low-pressure oxygen interface.

[0054] Preferably, in the high-pressure oxygen source 101, at least a high-pressure oxygen interface is included, which is used to fill sufficient high-pressure oxygen into the high-pressure oxygen source 101; the high-pressure oxygen source 101 further includes at least a high-pressure oxygen outlet, and at least a first control valve 103 is provided at the high-pressure oxygen outlet, and the first control valve 103 controls the opening and closing state of the high-pressure oxygen outlet; the high-pressure oxygen outlet of the high-pressure oxygen source 101 is directly connected to at least one high-pressure oxygen interface of at least one mixing chamber of the mixing module 200 through a high-pressure oxygen pipe 107, so as to transport the high-pressure oxygen in the high-pressure oxygen source 101 into the mixing chamber of the mixing module 200.

[0055] Preferably, in the low-pressure oxygen source 102, at least a low-pressure oxygen interface is included, which is used to fill sufficient low-pressure oxygen into the low-pressure oxygen source 102; the low-pressure oxygen source 102 further includes at least a low-pressure oxygen outlet, and at least a second control valve 104 is provided at the low-pressure oxygen outlet, and the second control valve 104 controls the opening and closing state of the low-pressure oxygen outlet; the low-pressure oxygen outlet of the low-pressure oxygen source 102 is directly connected to at least one low-pressure oxygen interface of at least one mixing chamber of the mixing module 200 through a low-pressure oxygen pipe 108, so as to transport the low-pressure oxygen in the low-pressure oxygen source 102 into the mixing chamber of the mixing module 200.

[0056] Preferably, at least a first monitor 105 is provided on the high-pressure oxygen pipe 107 between the high-pressure oxygen source 101 and the mixing module 200, which is used to monitor the flow rate and flow of the high-pressure oxygen in the high-pressure oxygen pipe 107.

[0057] Preferably, at least a second monitor 106 is provided on the low-pressure oxygen pipe 108 between the low-pressure oxygen source 102 and the mixing module 200, which is used to monitor the flow rate and flow of the low-pressure oxygen in the low-pressure oxygen pipe 108.

[0058] Preferably, a third monitor 307 is further provided on the intake pipe 302 of the circulation loop 301 between the mixing module 200 and the exchange module 300, which is used to monitor the flow rate, flow and humidity of the gas to be inhaled in the intake pipe 302. Specifically, the third monitor 307 is provided between the humidifier 305 of the intake pipe 302 and the exchange module 300, which is convenient for monitoring the humidified gas to be inhaled to accurately monitor the humidity of the gas to be inhaled.

[0059] Preferably, a fourth detector 308 is further provided on the exhalation pipeline 303 of the circulation loop 301 between the mixing module 200 and the switching module 300, for monitoring the flow rate, flow volume and components of the exhaled gas in the breathing pipeline. Specifically, the fourth detector 308 is arranged between the purifier 306 of the exhalation pipeline 303 and the mixing module 200, facilitating the monitoring of the purified exhaled gas to accurately monitor whether the gas contains viruses, bacteria, etc.

[0060] Preferably, according to Figure 5 As shown, the gas control system of the present application further includes a processing module 400, which can at least receive the specific information monitored by the first monitor 105, the second monitor 106, the third monitor 307, and the fourth detector 308, and establish a first database for the first monitor 105, a second database for the second monitor 106, a third database for the third monitor 307, and a fourth database for the fourth detector 308. At least the time point and information such as the gas flow rate, flow volume, and state on each pipeline corresponding to the time point are stored in the first database, the second database, the third database, and the fourth database.

[0061] Preferably, the processing module 400 of the gas control system of the present application can also control the opening and closing states of the first control valve 103 and the second control valve 104 in the oxygen supply module 100, and then control the pipeline connection state between the oxygen supply module and the mixing module 200.

[0062] Preferably, the processing module 400 of the gas control system of the present application can also control the start and stop states of the first fan blade 214 and the second fan blade 215 in the mixing chamber of the mixing module 200. The processing module 400 can also control the start and stop states of the output pump 213 in the mixing chamber and the input pump 304 in the exhalation pipeline 303.

[0063] Preferably, the processing module 400 of the gas control system of the present application can also receive the gas information transmitted back by the oxygen sensor 211 and the pressure sensor 212 in the mixing chamber.

[0064] Preferably, the processing module 400 adjusts the working states of the first control valve 103, the second control valve 104, the first fan blade 214 and the second fan blade 215 based on the gas information, so that the oxygen in the mixing module 200 reaches a preset concentration.

[0065] Preferably, the processing module 400 can also adjust the gas flow rate in the circulation loop 301 between the mixing module 200 and the switching module 300 by controlling the power of the input pump 304 and the output pump 213, and adjust the pumping power based on the gas flow rate information feedback by the third monitoring module and the fourth monitoring module, fully ensuring that the gas enters the human respiratory system with a suitable tidal volume.

[0066] Example 3

[0067] This embodiment is an improvement and supplement based on Embodiment 1 and Embodiment 2, and the repeated content will not be elaborated.

[0068] This embodiment improves the foregoing preferred embodiment. When using the mixing chamber to mix oxygen, air, and exhaled gas, it takes a certain amount of time. For patients who need continuous ventilation, their ventilation cannot be intermittent. They must maintain a certain breathing frequency and continuously ventilate the patient's body. Therefore, the technical solution of simply using a single mixing chamber for mixing and ventilation cannot fully meet the requirements. Based on this, the present application sets at least two mixing chambers at least at the mixing module 200. The two mixing chambers alternately perform gas mixing and gas replenishment. Specifically, when one mixing chamber is performing gas mixing, the other mixing chamber is in a gas delivery state. For the mixing chamber performing gas mixing, its output pump 213 is in a closed state, its oxygen supply interface, exhalation inlet, and pump inlet are in an open state, and the first impeller 214 and the second impeller 215 inside it are in a working state. The processing module 400 adjusts the internal gas state based on the oxygen sensor 211 and the pressure sensor 212; for the mixing chamber performing gas delivery, its output pump 213 is in an open state, its oxygen supply interface, exhalation inlet, and pump inlet are in a closed state, and the first impeller 214 and the second impeller 215 inside it are in a stopped state. The processing module 400 adjusts the output power of the output pump 213 based on the monitoring data of the third monitor 307 on the circulation loop 301.

[0069] To avoid the system being too redundant and large, the oxygen supply module 100 and the exchange module 300 of the system should be as simple as possible. Especially for the exchange module 300, the exchange module 300 is worn on the patient's mouth and nose face. During ventilation, multiple exchange modules 300 are not conducive to gas delivery, and the scheme of frequently replacing the exchange module 300 is also too complicated. Therefore, the exchange module 300 should be kept single. However, when there are two mixing chambers, the two mixing chambers need to alternately introduce the gas to be inhaled into the exchange module 300, and for the gas introduced into the exchange module 300 within a certain period of time, it needs to maintain the same flow rate and pressure. The conventional gas interface switching method usually uses the method of closing one pipeline first and then opening another pipeline for switching. During the process of closing one pipeline and opening another pipeline, it takes a certain amount of time, and the flow rate and pressure of the gas will both fluctuate. To solve the above problems, the present application proposes an adapter 500 that can smoothly switch the connection state between the inhalation pipeline 302 and the gas outlets of different mixing chambers.

[0070] For the above reasons, when the mixing module 200 of the present application is at least configured with a first mixing chamber 201 and a second mixing chamber 202, the mixing module 200 at least includes a first channel 220 for discharging gas in the first mixing chamber 201 and a second channel 230 for discharging gas in the second mixing chamber 202. Among them, the first channel 220 and the second channel 230 can be alternately connected to the transfer interface 502 of the adapter 500, thereby realizing a stable and continuous transfer between different mixing chambers.

[0071] Preferably, as Figure 4 shown, the adapter 500 can be designed as a cylinder. Among them, a driving unit can be arranged at the axis of the cylindrical structure of the adapter 500 to drive the transfer track 501 of the adapter 500 to rotate. Specifically, the transfer track 501 is an arc-shaped track on one of the circular surfaces of the cylindrical adapter 500, and can rotate around the center of the circle under the drive of the driving unit. A transfer interface 502 is provided in the transfer track 501, and the transfer interface 502 is communicated with the internal transfer channel 503. The transfer channel 503 is designed as an annular cylindrical space formed by the shell layer of the cylindrical adapter 500 and the surface of the driving element 504.

[0072] Preferably, as Figure 2 and Figure 3 shown, the first mixing chamber 201 and the second mixing chamber 202 can be designed as rectangles. The first mixing chamber 201 and the second mixing chamber 202 are arranged side by side and closely attached, and the first mixing chamber 201 and the second mixing chamber 202 are not communicated with each other.

[0073] For the first mixing chamber 201 and the second mixing chamber 202 that are closely attached, they at least include a joint surface that is attached to each other. The sides relative to the joint surface together form four sides of the mixing module 200 with joint gaps. Among them, four interfaces are respectively provided on the four sides. Specifically, they include a high-pressure oxygen interface, a low-pressure oxygen interface, an inhalation outlet, and an exhalation inlet.

[0074] Preferably, the high-pressure oxygen interface includes a first high-pressure oxygen interface 204 provided on the first mixing chamber 201 and a second high-pressure oxygen interface 208 provided on the second mixing chamber 202. The first high-pressure oxygen interface 204 and the second high-pressure oxygen interface 208 are arranged side by side and closely attached, and are then connected to the high-pressure oxygen source 101 through the adapter 500.

[0075] Preferably, the low-pressure oxygen interface includes a first low-pressure oxygen interface 205 provided on the first mixing chamber 201 and a second low-pressure oxygen interface 209 provided on the second mixing chamber 202. The first low-pressure oxygen interface 205 and the second low-pressure oxygen interface 209 are arranged side by side and closely attached, and are then connected to the low-pressure oxygen source 102 through the adapter 500.

[0076] Preferably, the air inlet includes a first air inlet 203 provided on the first mixing chamber 201 and a second air inlet 207 provided on the second mixing chamber 202. The first air inlet 203 and the second air inlet 207 are arranged side by side and in contact, and are then connected to the air suction pipeline 302 through the adapter 500.

[0077] Preferably, the air outlet includes a first air outlet 206 provided on the first mixing chamber 201 and a second air outlet 210 provided on the second mixing chamber 202. The first air outlet 206 and the second air outlet 210 are arranged side by side and in contact, and are then connected to the air exhalation pipeline 303 through the adapter 500.

[0078] Taking the connection mode of the air inlet and the connector as an example, the first air inlet 203 is connected to the first channel 220 of the first mixing chamber 201, and the second air inlet 207 is connected to the second channel 230 of the second mixing chamber 202.

[0079] In this configuration, the first channel 220 and the second channel 230 are closely arranged side by side on the transfer track 501. Specifically, the openings of the first channel 220 and the second channel 230 are designed in a frustum shape of a circular ring shape that conforms to the engaging groove of the transfer track 501.

[0080] Preferably, according to the above method, the shape of the transfer port 502 on the transfer track 501 is correspondingly designed to be the same as the shape of the first opening of the first channel 220 and the second opening of the second channel 230. The first opening and the second opening are arranged inside the annular engaging groove of the transfer track 501 in a manner that their side walls close to each other are in contact. In this way, the rotation angle of the transfer track 501 is further reduced. The specific rotation angle is related to the sizes of the first opening and the second opening, and the rotation angle of the transfer track 501 can be determined according to the central angle formed by the two edges of the first opening and the second opening.

[0081] Preferably, during the rotation of the transfer track 501, the communication state between the transfer port 502 and the first opening and the second opening changes dynamically. For example, in a certain state, the transfer port 502 completely coincides with the first opening, the first channel 220 is connected to the transfer channel 503, the second opening is blocked by the part of the engaging groove that does not cover the transfer port 502, and the second channel 230 is disconnected from the transfer channel 503. When it is necessary to adjust the branch connected to the transfer channel 503 through the transfer track 501, rotate the transfer track 501 to drive the transfer port 502 to move from the first opening to the second opening. During this movement, the area of the communication part between the transfer port 502 and the first opening gradually decreases, while at the same time, the area of the communication part between the transfer port 502 and the second opening gradually increases until the second opening completely coincides with the transfer port 502 and the first opening is completely blocked.

[0082] In this mode, the transfer interface 502 is always in the connection path of the first channel 220 and / or the second channel 230. This mode has a smaller rotation amplitude and requires less rotation time compared to the arrangement mode of the aforementioned adapter 500, meeting the requirements of the system solution.

[0083] Taking a patient who needs lung recruitment as an example, in cases such as emergency and rescue, during the rescue process in the emergency room, mechanical ventilation is needed to assist the patient in breathing. During mechanical ventilation, a pressure or volume higher than the conventional average airway pressure is intermittently given and maintained for a certain period of time to recruit collapsed alveoli. After relieving the life-threatening situation, for patients with alveolar collapse, gas still needs to be continuously introduced according to specific mechanical ventilation parameters for a period of time after the rescue. During the above two processes that require mechanical ventilation, as described above, when the gas mixing module 200 of the present application mixes gases, it takes a certain amount of time, or there is an interval of ventilation disconnection when switching between the two mixing chambers. The existing time interval may cause the risk of secondary collapse of the patient's alveoli.

[0084] Thus, the adapter 500 connects the exchange module 300 to different mixing chambers in the manner of opening different connection channels according to the above preset rules, so that the gas flow into the exchange module 300 from the mixing module 200 remains in a stable flow state within a preset time. The gas control system of the present application can solve the defects of unstable continuous ventilation and ventilation interruption during transfer. The so-called preset rules are determined by the processing module 400. The specific determination basis is to judge the gas volume and gas concentration in the first mixing chamber 201 and the second mixing chamber 202. Specifically, the oxygen sensor 211 and the air pressure sensor 212 are used to monitor the gas in the mixing chamber. When the gas pressure in one of the mixing chambers is insufficient, it indicates that the gas in this mixing chamber is about to be exhausted, and at this time, it is necessary to switch to another mixing chamber. For one of the mixing chambers during mixing, the processing module 400 needs to judge whether the oxygen content and gas pressure after mixing in the mixing chamber are within the preset standard, and only under the premise of being within the preset standard can it switch from this mixing chamber to another mixing chamber.

[0085] Preferably, the processing module 400 can at least adjust the mixing rate of another mixing chamber based on the output speed of the mixing chamber that outputs gas. Specifically, the processing module 400 adjusts the mixing rate by adjusting the oxygen supply efficiency of the oxygen supply module 100 and the power of the first fan blade 214 and the second fan blade 215 in the mixing chamber.

[0086] According to a specific embodiment, the gas control system further includes a drug supply module for providing vaporized or atomized drugs. The drug supply module is in communication with the mixing module 200. Through the technical solution of this embodiment, it also avoids directly discharging the unabsorbed drugs to the outside world. On the one hand, it reduces environmental pollution, and on the other hand, it recovers the drugs and reduces the drug dosage. Preferably, a drug detection unit for detecting the drug content of the mixed gas in the mixing module 200 is provided in the mixing module 200, and the drug supply module adjusts the drug input amount based on the detection result of the drug detection unit. Preferably, a fifth monitor is provided on the exhalation pipeline 303. The fifth monitor is used to monitor the drug content in the gas of the exhalation pipeline. The drug absorption rate of the patient for the drug is analyzed based on the drug content in the exhalation pipeline gas monitored by the fifth monitor, and the oxygen supply parameters in the mixing module 200, such as the oxygen concentration, are adjusted according to the absorption rate. When an anesthetic drug is applied, the oxygen concentration in the mixing module 200 is increased. Preferably, when the absorption rate of the anesthetic drug increases or reaches a preset threshold, the oxygen concentration in the mixing module 200 is increased. According to a specific embodiment, the start / stop, working mode, and working parameters of the drug supply module are adjusted according to the oxygen concentration in the mixing module 200 and the oxygen concentration in the gas of the exhalation pipeline 303. Specifically, the drug supply amount and drug supply rate are determined based on the difference between the oxygen concentration in the mixing module 200 and the oxygen concentration in the gas of the exhalation pipeline 303.

[0087] Preferably, the first channel 220 of the adapter 500 is kept connected to the first mixing chamber 201 of the system. The first mixing chamber 201 can simulate the ventilation technique implemented for lung recruitment by the second mixing chamber 202 connected to the second channel 230 during the process that the adapter 500 gradually transfers the transfer channel 503 from the second mixing chamber 202 connected to the second channel 230 to the first mixing chamber 201 connected to the first channel 220 based on the adjustment of the processing module 400, so as to complete the transfer without causing a change in the gas state within the transfer channel 503.

[0088] Moreover, in combination with the structural design of the adapter 500 of the present application, when the parameters of the output pumps 213 of the first mixing chamber 201 connected to the first channel 220 and the second mixing chamber 202 connected to the second channel 230 are set the same, during the process that the transfer port 502 on the transfer track 501 of the adapter 500 gradually transfers from the opening of the second channel 230 to the opening of the first channel 220, the gas state within the transfer channel 503 connected to the adapter 500 will not change.

[0089] Preferably, during the rotation of the transfer track 501, the connection state between the transfer interface 502 and the first opening and the second opening changes dynamically. For example, in a certain state, the transfer interface 502 completely coincides with the first opening, the first channel 220 is connected to the transfer channel 503, the second opening is blocked by the part of the groove that does not cover the transfer interface 502, and the second channel 230 is disconnected from the transfer channel 503. When it is necessary to adjust the branch connected to the transfer channel 503 through the transfer track 501, rotate the transfer track 501 to drive the transfer interface 502 to move from the first opening to the second opening. During this movement, the area of the connection part between the transfer interface 502 and the first opening gradually decreases, while at the same time, the area of the connection part between the transfer interface 502 and the second opening gradually increases until the second opening completely coincides with the transfer interface 502 and the first opening is completely blocked.

[0090] Based on this, taking the transfer of the switching module 300 from the second mixing chamber 202 to the first mixing chamber 201 as an example, the first mixing chamber 201 can, based on the control signal and parameter information of the output pump 213 of the second mixing chamber 202 at the current time obtained by the processing module 400, before the processing module 400 drives the transfer track 501 to rotate, the processing module 400 preferentially controls the output pump 213 of the first mixing chamber 201 to be set according to the parameter information of the output pump 213 at the current time. For different mechanical ventilation stages of the same patient, the tidal volume and ventilation rate of ventilation are different, and even such parameters may be a dynamic change. The processing module 400 can accurately control the tidal volume and ventilation rate of the first mixing chamber 201 based on the current parameters or current change trends of the tidal volume and ventilation rate of ventilation in the second mixing chamber 202. And through the setting of the adapter 500, the first mixing chamber 201 can accurately simulate the ventilation gas state of the second mixing chamber 202, ensuring that the mechanical ventilation state of the patient remains roughly the same before and after the transfer, avoiding situations such as unstable ventilation state and disrupted ventilation continuity during the transfer, and greatly reducing the risk of the patient during continuous mechanical ventilation.

[0091] It should be noted that the above specific embodiments are exemplary. Those skilled in the art can come up with various solutions inspired by the disclosure of the present invention, and these solutions also fall within the scope of the disclosure of the present invention and within the protection scope of the present invention. Those skilled in the art should understand that the description and drawings of the present invention are illustrative and do not constitute a limitation on the claims. The protection scope of the present invention is defined by the claims and their equivalents.

Claims

1. A gas control system, characterized in that: include: An oxygen supply module (100), used for providing oxygen; A mixing module (200) for mixing oxygen with air and / or exhaled gas; An exchange module (300) is used to exchange the mixed gas with the human respiratory system; The oxygen supply module (100) is capable of introducing oxygen into the first mixing chamber (201) or the second mixing chamber (202) of the mixing module (200), and the mixing module (200) is capable of at least mixing the gas inside into gas to be inhaled containing a preset concentration of oxygen; The mixing module (200) is connected to the exchange module (300) via a circulation loop (301), wherein the circulation loop (301) including at least an inhalation pipeline (302) and an exhalation pipeline (303) is connected to the outlet channels of the first mixing chamber (201) and the second mixing chamber (202) via an adapter (500), and the adapter (500) connects the exchange module (300) to different mixing chambers in a manner of opening different connection channels according to a preset rule; One of the first mixing chamber (201) and the second mixing chamber (202) of the mixing module (200) is in a mixed gas state, and the other is in a gas output state, and the working states of the first mixing chamber (201) and the second mixing chamber (202) are switched alternately; When the adapter track (501) of the adapter (500) rotates, the connection state of the adapter interface (502) of the same shape, the first opening of the first channel (220) and the second opening of the second channel (230) changes dynamically, so that the adapter interface (502) is always in the connection passage of the first channel (220) and / or the second channel (230), wherein the first channel (220) is used for the first mixing chamber (201) to exhaust gas, and the second channel (230) is used for the second mixing chamber (202) to exhaust gas.

2. The gas control system according to claim 1, characterized in that: The air intake pipeline (302) is used to pass the gas to be inhaled in the mixing module (200) into the exchange module (300); The exhalation pipeline (303) is used to pass the gas exhaled from the human respiratory system from the exchange module (300) back into the mixing module (200).

3. The gas control system according to claim 2, characterized in that: The air intake pipeline (302) is provided with a humidifier (305) for humidifying the gas to be inhaled, and a third monitor (307) is also provided between the humidifier (305) on the air intake pipeline (302) and the exchange module (300).

4. The gas control system according to claim 3, characterized in that: The exhalation pipeline (303) is provided with a purifier (306) for purifying exhaled gas of a human body, and a fourth monitor (308) is also provided between the purifier (306) of the exhalation pipeline (303) and the mixing module (200).

5. The gas control system according to claim 4, characterized in that: The inhalation line (302) can be alternately connected to the first mixing chamber (201) and the second mixing chamber (202), and the exhalation line (303) can be alternately connected to the first mixing chamber (201) and the second mixing chamber (202), wherein: The inhalation pipeline (302) and the exhalation pipeline (303) can only be connected to one of the mixing chambers individually.

6. The gas control system according to claim 5, characterized in that: The oxygen supply module (100) comprises at least a high-pressure oxygen source (101) and a low-pressure oxygen source (102), wherein the high-pressure oxygen source (101) and the low-pressure oxygen source (102) can jointly and / or individually supply oxygen into the mixing module (200), wherein: The high-pressure oxygen source (101) and the low-pressure oxygen source (102) are synchronously connected to the same mixing chamber.

7. The gas control system according to claim 6, characterized in that: The system further comprises a processing module (400), wherein the processing module (400) is connected to a control device and / or a collection device in the system and is capable of adjusting the working state of the control device based on feedback information from the collection device.

8. The gas control system according to claim 7, characterized in that: The collection device comprises a first monitor (105), a second monitor (106), a third monitor (307), and a fourth monitor (308), wherein the monitors are arranged between the pipelines; The collection device further comprises an oxygen sensor (211) and an air pressure sensor (212), wherein the oxygen sensor (211) and the air pressure sensor (212) are arranged inside a mixing chamber of the mixing module (200).

9. The gas control system according to claim 8, characterized in that: The control device comprises a first control valve (103) and a second control valve (104), wherein the first control valve (103) is arranged in a high-pressure oxygen source (101), and the second control valve (104) is arranged in a low-pressure oxygen source (102); The control device also includes a first fan blade (214), a second fan blade (215), an output pump (213), and an input pump (304), wherein the first fan blade (214) and the second fan blade (215) are arranged in a mixing chamber inside the mixing module (200) and are used to mix gases, the output pump (213) is also arranged in the mixing chamber and is used to output gases, and the input pump (304) is arranged in the exhalation pipeline (303).

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