Patent Application
20250082880
The present invention relates to the field of anesthesia technology, particularly to an anesthesia ventilator device that dynamically monitors and regulates partial pressure of carbon dioxide.
An anesthesia ventilator is a device that delivers anesthetic gas to a patient's alveoli using oxygen and air as carriers, forming an anesthetic gas partial pressure. After diffusion into the blood, it directly inhibits the central nervous system, resulting in a general anesthesia effect. Conventional anesthesia ventilators, due to excessive ventilation during use, can cause the patient to exhale too much carbon dioxide, resulting in a decrease in the partial pressure of carbon dioxide in the body and causing respiratory alkalosis (hyperventilation).
The present invention provides an anesthesia ventilator device that dynamically monitors and regulates partial pressure of carbon dioxide to solve the technical problem of respiratory alkalosis caused by excessive ventilation and excessive exhalation of carbon dioxide in conventional anesthesia ventilators during use.
To solve the above technical problem, the present invention discloses an anesthesia ventilator device that dynamically monitors and regulates partial pressure of carbon dioxide, comprising a ventilator main body connected to an oxygen source, an air source, an anesthetic gas source, and a carbon dioxide source at an input end of the ventilator main body, and a mask connected to an output end of the ventilator main body.
Preferably, the ventilator main body comprises:
Preferably, the gas supply branch comprises:
Preferably, the main gas supply pipeline is sequentially connected to the air source, a first filter, a first check valve, a second check valve, a third check valve, a first pressure sensor, and a first flow sensor, and the output end of the main gas supply pipeline is connected to the mask.
Preferably, between the first flow sensor and the mask, there is a heated humidifier, and between the second check valve and the third check valve, there is a breath gas generator.
Preferably, the first gas supply branch is sequentially connected to the oxygen source, a second filter, a second pressure sensor, a first flow control valve, and a second flow sensor, and the output end of the first gas supply branch is connected between the first filter and the first check valve;
The second gas supply branch is sequentially connected to the anesthetic gas source, a third filter, a third pressure sensor, a second flow control valve, and a third flow sensor, and the output end of the second gas supply branch is connected between the first check valve and the second check valve.
The third gas supply branch is sequentially connected to the carbon dioxide source, a fourth filter, a fourth pressure sensor, and a third flow control valve, and the output end of the third gas supply branch is connected between the third check valve and the first pressure sensor.
Preferably, one end of the exhalation circuit is connected to the first gas supply branch, and the other end is connected to the mask.
In the direction from the first gas supply branch to the mask, there are sequentially connected a fourth flow control valve, a fifth pressure sensor, and a pressure regulating diaphragm valve.
An output end of the pressure regulating diaphragm valve is connected to the environment.
The fifth pressure sensor and the pressure regulating diaphragm valve are connected by an exhalation circuit, and a throttle valve is provided on the exhalation circuit. An output end of the throttle valve is connected to the environment.
Preferably, the anesthetic gas source is any one of a nitrous oxide source, an ether source, a sevoflurane source, and a desflurane source.
Preferably, the anesthesia ventilator device further comprises:
The exhaled impurity filtration cleaning assembly comprises:
The filter mesh cleaning assembly comprises:
Preferably, the air source is equipped with a dust supplement assembly, which comprises:
The technical solution of the present invention will be further described in detail below with reference to the accompanying drawings and embodiments.
Element reference: 1—Ventilator main body; 100—Oxygen source; 101—Air source; 102—Anesthetic gas source; 103—Carbon dioxide source; 104—Mask; 105—Main gas supply pipeline; 1050—First filter; 1051—First check valve; 1052—Second check valve; 1053—Third check valve; 1054—First pressure sensor; 1055—First flow sensor; 1056—Heated humidifier; 1057—Breath gas generator; 106—First gas supply branch; 1060—Second filter; 1061—Second pressure sensor; 1062—First flow control valve; 1063—Second flow sensor; 107—Second gas supply branch; 1070—Third filter; 1071—Third pressure sensor; 1072—Second flow control valve; 1073—Third flow sensor; 108—Third gas supply branch; 1080—Fourth filter; 1081—Fourth pressure sensor; 1082—Third flow control valve; 109—Exhalation circuit; 1090—Fourth flow control valve; 1091—Fifth pressure sensor; 1092—Pressure regulating diaphragm valve; 1093—Environment; 1094—Throttle valve; 2—Gas supply branch; 3—Exhaled impurity filtration cleaning assembly; 300—Recovery filter assembly casing; 3000—Impurity filter mesh; 3001—Filter mesh mounting drive; 3002—Filter mesh mounting executing component; 3003—Mounting hole; 3004—First mounting cavity; 3005—Magnetic compression piston; 3006—First elastic element; 3007—Piezoelectric ceramic; 3008—Second mounting cavity; 3009—Sliding block; 301—Filter mesh cleaning assembly; 3010—Third mounting cavity; 3011—Threaded shaft; 3012—Threaded nut; 3013—Connecting bracket; 3014—Water outlet barrel; 3015—Water outlet hole; 3016—Electric cleaning extensible brush; 3017—Compression airbag; 3018—Third elastic element; 3019—Impurity collection hole; 302—Second elastic element; 3020—Electromagnet; 3021—Cleaning liquid storage tank; 3022—Water inlet funnel; 3023—Partition; 3024—Suction tube; 4—Dust supplement assembly; 400—Mounting fixed plate; 4000—Cleaning plate storage groove; 401—Coil electromagnet; 402—Cleaning plate; 403—Cleaning bristles; 404—Reset spring; 405—Strip-shaped electromagnet; 406—Flipping component; 4060—Flipping component mounting cavity; 4061—Guide plate; 4062—Guide groove; 4063—Cylinder mounting disk; 4064—Connecting rod; 4065—Electrostatic adsorption net connecting rod; 4066—Electrostatic adsorption net; 407—Negative ion emitter; 408—Negative pressure fan; 4080—Negative pressure chamber; 4081—Dust adsorption net; 4082—Dust scraping sleeve; 4083—Sprayer; 4084—Dust collection trough.
The preferred embodiments of the present invention will be described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are for the purpose of illustrating and explaining the present invention and are not intended to limit the present invention.
In addition, in the present invention, the terms “first,” “second,” etc., are used for descriptive purposes only and do not imply any particular order or priority, nor do they limit the present invention. They are merely used to distinguish components or operations described using the same technical terms and should not be construed as indicating or implying the relative importance of the indicated technical features or the quantity of the indicated technical features. Therefore, features designated as “first,” “second,” etc., may include at least one of such features, either explicitly or implicitly. Furthermore, the technical solutions and technical features of various embodiments can be combined with each other, but such combinations must be based on the ability of ordinary skilled artisans in the field to implement them. When the combination of technical solutions conflicts with each other or cannot be implemented, it should be considered that the combination of such technical solutions does not exist and is not within the scope of protection required by the present invention.
The present invention provides the following embodiments.
The present embodiment of the invention provides an anesthesia ventilator device that dynamically monitors and regulates partial pressure of carbon dioxide, as shown in
Preferably, the anesthetic gas source 102 comprises any one of nitrous oxide gas source, ether gas source, sevoflurane gas source, and desflurane gas source.
The working principle and beneficial effects of the above technical solution are as follows: When in use, the mask 104 is placed on the patient's face, and the oxygen source 100, air source 101, anesthetic gas source 102, and carbon dioxide source 103 are used to provide oxygen, air, anesthetic gas, and carbon dioxide, respectively. Oxygen, air, anesthetic gas, and carbon dioxide are mixed inside the ventilator main body 1 and delivered to the patient's body through the mask 104. Compared to conventional anesthesia ventilator devices, the present invention uses a mixture of oxygen, air source, and carbon dioxide as the carrier gas for delivering anesthetic gas. This can avoid respiratory alkalosis in patients during the use of the anesthesia ventilator device. That is, when the patient eliminates excessive carbon dioxide from the body, the carbon dioxide source 103 can timely replenish the carbon dioxide in the patient's body, thereby preventing a decrease in the partial pressure of carbon dioxide in the patient's body.
The present invention solves the technical problem in conventional anesthesia ventilator devices where excessive ventilation during use can cause the patient to exhale too much carbon dioxide, leading to a decrease in the partial pressure of carbon dioxide in the body and causing respiratory alkalosis.
Based on the above the embodiment 1, the ventilator main body 1 comprises:
The gas supply branch 2 comprises:
On the main gas supply pipeline 105, there are sequentially connected the air source 101, a first filter 1050, a first check valve 1051, a second check valve 1052, a third check valve 1053, a first pressure sensor 1054, and a first flow sensor 1055. The output end of the main gas supply pipeline 105 is connected to the mask 104.
Between the first flow sensor 1055 and the mask 104 on the main gas supply pipeline 105, there is a heated humidifier 1056, and between the second check valve 1052 and the third check valve 1053, there is a breath gas generator 1057.
On the first gas supply branch 106, there are sequentially connected the oxygen source 100, a second filter 1060, a second pressure sensor 1061, a first flow control valve 1062, and a second flow sensor 1063. The output end of the first gas supply branch 106 is connected between the first filter 1050 and the first check valve 1051.
On the second gas supply branch 107, there are sequentially connected the anesthetic gas source 102, a third filter 1070, a third pressure sensor 1071, a second flow control valve 1072, and a third flow sensor 1073. The output end of the second gas supply branch 107 is connected between the first check valve 1051 and the second check valve 1052.
On the third gas supply branch 108, there are sequentially connected the carbon dioxide source 103, a fourth filter 1080, a fourth pressure sensor 1081, and a third flow control valve 1082. The output end of the third gas supply branch 108 is connected between the third check valve 1053 and the first pressure sensor 1054.
One end of the exhalation circuit 109 is connected to the first gas supply branch 106, and the other end is connected to the mask 104. In the direction from the first gas supply branch 106 to the mask 104, there are sequentially connected the fourth flow control valve 1090, fifth pressure sensor 1091, and pressure regulating diaphragm valve 1092.
An output end of the pressure regulating diaphragm valve 1092 is connected to the environment 1093.
Between the fifth pressure sensor 1091 and the pressure regulating diaphragm valve 1092, there is an exhalation branch, and the exhalation branch is equipped with a throttle valve 1094. An output end of the throttle valve 1094 is connected to the environment 1093.
The working principle and beneficial effects of the above technical solution are as follows: During use, air from the air source 101 flows into the main gas supply pipeline 105, oxygen from the oxygen source 100 enters the main gas supply pipeline 105 through the second filter 1060, the second pressure sensor 1061, the first flow control valve 1062, and the second flow sensor 1063. Anesthetic gas from the anesthetic gas source 102 enters the main gas supply pipeline 105 through the third filter 1070, the third pressure sensor 1071, the second flow control valve 1072, and the third flow sensor 1073. Carbon dioxide from the carbon dioxide source 103 enters the main gas supply pipeline 105 through the fourth filter 1080, the fourth pressure sensor 1081, and the third flow control valve 1082. The mixed gas of air, oxygen, anesthetic gas, and carbon dioxide is delivered to the patient for anesthesia through the mask 104 via the main gas supply pipeline 105. The design of the carbon dioxide source 103 prevents the occurrence of excessive ventilation in the patient during the use of the anesthesia ventilator. The exhaled gas from the patient enters the exhalation circuit 109 through the mask 104 and is discharged to the environment 1093 through the pressure regulating diaphragm valve 1092.
The first filter 1050, the second filter 1060, the third filter 1070, and the fourth filter 1080 are used to filter the air from the air source 101 entering the main gas supply pipeline 105, the oxygen from the oxygen source 100 entering the first gas supply branch 106, the anesthetic gas from the anesthetic gas source 102 entering the second gas supply branch 107, and the carbon dioxide from the carbon dioxide source 103 entering the third gas supply branch 108, respectively.
The first pressure sensor 1054, the second pressure sensor 1061, the third pressure sensor 1071, the fourth pressure sensor 1081, and the fifth pressure sensor 1091 are used to detect the pressure in the main gas supply pipeline 105, the first gas supply branch 106, the second gas supply branch 107, the third gas supply branch 108, and the exhalation circuit 109, respectively.
The first flow sensor 1055, the second flow sensor 1063, and the third flow sensor 1073 are used to detect the flow rate of the mixed gas in the main gas supply pipeline 105, the flow rate of oxygen in the first gas supply branch 106, and the flow rate of anesthetic gas in the second gas supply branch 107, respectively.
The first flow control valve 1062, the second flow control valve 1072, and the third flow control valve 1082 are used to regulate and control the flow rate of oxygen in the first gas supply branch 106, the flow rate of anesthetic gas in the second gas supply branch 107, and the flow rate of carbon dioxide in the third gas supply branch 108, respectively.
The first check valve 1051, the second check valve 1052, and the third check valve 1053 prevent backflow of the mixed gas in the main gas supply pipeline 105.
The breath gas generator 1057 is used to generate the mixed input gas, also known as tidal gas, which consists of oxygen, air, and anesthetic gas. The heated humidifier 1056 is used to heat and humidify the tidal gas to make it suitable for patient respiration.
The oxygen from the oxygen source 100 can flow into the environment 1093 through the fourth flow control valve 1090, the fifth pressure sensor 1091, and the throttle valve 1094. By adjusting the fourth flow control valve 1090, the pressure value of the exhalation circuit 109 can be adjusted, which in turn adjusts the detection value of the fifth pressure sensor 1091. Since the fifth pressure sensor 1091 and the pressure regulating diaphragm valve 1092 are in the same circuit, the detection value of the fifth pressure sensor 1091 represents the pressure value (end-expiratory positive pressure) at the pressure regulating diaphragm valve 1092. By adjusting the end-expiratory positive pressure, the respiratory tract can be maintained at a certain positive pressure during the expiration phase, avoiding early closure of the alveoli and promoting the expansion of partially non-ventilated alveoli due to exudation or lung collapse, thereby increasing the functional residual capacity and improving blood oxygenation.
Overall, the described technical solution provides a ventilator system with multiple gas sources (air, oxygen, anesthetic gas, and carbon dioxide) that are filtered, controlled, and mixed to deliver a suitable gas mixture to the patient for anesthesia. It comprises various sensors and valves to monitor and regulate gas pressure and flow rates, ensuring the safety and effectiveness of the respiratory process. Additionally, features such as the carbon dioxide source design and the pressure regulation mechanism contribute to optimizing ventilation and maintaining positive pressure in the respiratory tract.
Based on the embodiments 1 or 2, the anesthesia ventilator device further comprises:
The exhaled impurity filtration cleaning assembly 3 comprises:
The working principle and beneficial effects of the above technical solution are as follows: The exhaled gas from the patient passes through two impurity filter meshes 3000 and is finally discharged into the environment 1093. When the exhaled gas flows through the impurity filter mesh 3000, impurities in the gas adhere to the impurity filter mesh 3000, preventing impurities from blocking the exhalation circuit 109 and ensuring the smooth operation of the anesthesia ventilator.
When replacing the impurity filter mesh 3000, the magnetic compression piston 3005 is manually pressed, causing the magnetic compression piston 3005 to compress the piezoelectric ceramic 3007. After the piezoelectric ceramic 3007 is compressed, the electromagnet 3020 is energized, and the two electromagnets 3020 attract and compress the second elastic element 302. At the same time, the sliding block 3009 transitions from a state of mutual cooperation with the mounting hole 3003 to a state of disengagement from the mounting hole 3003. At this point, the impurity filter mesh 3000 can be manually pulled out for replacement.
Before cleaning the impurity filter mesh 3000, the second driving component is used to drive the partition 3023 to slide upward and close the recovery filter assembly casing 300, preventing cleaning liquid from entering the exhalation circuit 109.
During the cleaning of the impurity filter mesh 3000, the first driving component drives the threaded shaft 3011 to rotate. The rotation of the threaded shaft 3011 moves the threaded nut 3012 along the threaded shaft 3011. When the first driving component drives the threaded shaft 3011 in the forward direction, the threaded nut 3012 moves downward along the threaded shaft 3011. During this downward movement of the threaded nut 3012, the compression airbag 3017 and the third elastic element 3018 are compressed. Then, the first driving component drives the threaded shaft 3011 to reverse, causing the threaded nut 3012 to move upward along the threaded shaft 3011. During this upward movement of the threaded nut 3012, the compression airbag 3017 gradually returns to its original length under the action of the third elastic element 3018. The suction tube 3024 draws water from the cleaning liquid storage tank 3021 into the compressed airbag 3017. When the threaded nut 3012 moves downward again along the threaded shaft 3011, the compression airbag 3017 is compressed again, and the water inside the compression airbag 3017 is pressed into the water outlet barrel 3014 and sprayed out through the water outlet hole 3015. During the movement of the threaded nut 3012, the electric cleaning extensible brush 3016 is driven to move up and down, thereby cleaning the impurity filter mesh 3000. The cleaning intensity of the electric cleaning extensible brush 3016 can be adjusted by extending or retracting it. The cleaned impurities are collected in the impurity collection hole 3019.
Based on the embodiment 1, the air source 101 is equipped with a dust supplement assembly 4, which comprises:
The working principle and beneficial effects of the above technical solution are as follows: During operation, the negative ion emitter 407 emits negative ions into the air source 101, causing the dust in the air inside the air source 101 to carry a negative charge. Then, the third driving component drives the connecting rod 4064 to rotate. The rotation of the connecting rod 4064 drives the electrostatic adsorption net connecting rod 4065 to flip 180 degrees from the position shown in
When cleaning the electrostatic adsorption net 4066, the electrostatic adsorption net 4066 flips back to the position shown in
Based on the embodiment 1, the anesthesia ventilator device further comprises:
The filter replacement alarm system comprises:
Step 1: calculating the actual blockage condition of the air filter element based on the first flow rate sensor, the second flow rate sensor, and the timer according to the following:
wherein ∃ is the actual blockage condition of the air filter element, μ1 is the detection value of the first flow rate sensor, μ2 is the detection value of the second flow rate sensor, δ is the dynamic viscosity of the air within the air source 101, B is the thickness of the air filter element, φ is the dynamic factor of the air, d is the gap diameter on the air filter element, φ is the correction factor for the fiber direction of the air filter element, γ is the preset capacity density of the air filter element (the amount of impurities per cubic meter of space, in kg/m3), γ1 is the preset density of impurities within the air source 101, τ is the void fraction of the air filter element, ΔP0 is the baseline pressure difference on both sides of the air filter element when not in use, ω is the actual usage frequency of the air filter element, t is the detection value of the timer, th is the actual service life of the air filter element, lg is the logarithm with base 10, dmax is the maximum preset diameter of impurities in the air, and dmin is the minimum preset diameter of impurities in the air; and
Step 2: using the controller to compare the actual blockage condition of the air filter element with the preset blockage condition of the air filter element. If the actual blockage condition is greater than the preset blockage condition, the alarm is triggered.
The working principle and beneficial effects of the above technical solution are as follows: Firstly, based on the first flow sensor, the second flow sensor, and a timer, the actual clogging condition of the air filter is calculated. Then, the controller compares the actual clogging condition of the air filter with the preset clogging condition. If the actual clogging condition is greater than the preset condition, the alarm will be triggered. The greater the difference in airflow velocity on both sides of the air filter, the more severe the actual clogging condition. The higher the dynamic viscosity of the air, the more severe the actual clogging condition. The thicker the air filter, the more severe the actual clogging condition. The higher the preset impurity density in the air source 101, the more severe the actual clogging condition of the air filter. The smaller the void ratio of the air filter, the more severe the actual clogging condition. The smaller the preset bulk density of the air filter, the more severe the actual clogging condition. The higher the actual frequency of use of the air filter, the more severe the actual clogging condition. The greater the difference between the actual total usage time and the actual lifespan of the air filter, the more severe the actual clogging condition. The design of the filter replacement alarm system ensures timely replacement of the air filter, guarantees the cleanliness of the air in the oxygen source 101, and improves the safety of the anesthesia ventilator.
Obviously, those skilled in the art can make various modifications and variations to the present invention without departing from the spirit and scope of the invention. Therefore, if these modifications and variations fall within the scope of the claims and equivalent technologies of the present invention, the present invention also intends to include these modifications and variations.
| Number | Date | Country | Kind |
|---|---|---|---|
| 202210578227.9 | May 2022 | CN | national |
| Filing Document | Filing Date | Country | Kind |
|---|---|---|---|
| PCT/CN2023/089765 | 4/21/2023 | WO |
