Anesthesia device capable of conveniently adjusting anesthetic concentration

Abstract

The invention relates to the technical field of medical instruments, in particular to an anesthesia device convenient for anesthetic concentration adjustment, which comprises a dilution air supply part, one end of the dilution air supply part is communicated with an anesthesia evaporation tank, and one end, far away from the dilution air supply part, of the anesthesia evaporation tank is communicated with a breathing tube. The end of the breathing tube away from the anesthetic vaporizer communicates with a mask part and a waste gas tank; a pneumatic assembly is arranged on the breathing tube, a negative pressure output assembly is arranged in the pneumatic assembly, a transmission assembly is arranged between the negative pressure output assembly and the pneumatic assembly, and when the amount of gas exhaled by a user is increased, the pneumatic assembly adjusts the negative pressure output assembly through the transmission assembly so as to increase the flow speed of anesthetic steam. The turbine mechanism is directly driven by the breathing flow of a user to adjust the flow speed of anesthesia steam in a linkage mode, the rotating speed change is monitored in real time, the valve opening degree is dynamically adjusted, and rapid response and dynamic adjustment of the anesthetic concentration during sudden breathing change are achieved.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, and more specifically to an anesthesia device that facilitates the adjustment of anesthetic concentration. Background Technology

[0002] In clinical anesthesia, precise adjustment of anesthetic concentration is a core aspect of general anesthesia. Excessive anesthetic concentration can lead to respiratory depression or circulatory failure during surgery; while insufficient concentration may result in intraoperative awakening or inadequate depth of anesthesia. Furthermore, factors such as metabolic rate, weight, and age vary among patients, requiring real-time dynamic adjustment of anesthetic concentration (e.g., elderly patients typically require lower concentrations, while young patients may experience uneven breathing). To improve the safety and precision of anesthesia, anesthesia machines with concentration adjustment capabilities have emerged.

[0003] Taking the Drager Fabius anesthesia machine as an example, it employs a closed-loop system that coordinates the vaporizer and proportional valve flow detection control: the vaporizer uses a copper vaporization chamber with a built-in temperature compensation mechanism, which monitors and compensates for temperature changes in real time through thermocouples, effectively improving the comfort of the inhaled gas for the child; the proportional valve flow detection control closed-loop system consists of a flow sensor, an electronic proportional valve, and an infrared spectrometer—the flow sensor monitors the fresh gas flow rate in real time, the electronic proportional valve dynamically adjusts the mixing ratio of carrier gas and anesthetic vapor according to the preset concentration, and the infrared spectrometer provides real-time feedback of anesthetic concentration data, ultimately forming a closed-loop control to achieve precise adjustment of the anesthetic concentration.

[0004] However, in actual clinical applications, the electronic control systems of existing anesthesia machines still have technical bottlenecks: when a child experiences respiratory abrupt changes (such as rapid breathing), the system response is delayed, potentially leading to instantaneous fluctuations in anesthetic concentration. Simultaneously, the facial physiological movements accompanying these respiratory abrupt changes (such as struggling or crying) can easily disrupt the seal of the oronasal mask, further exacerbating concentration fluctuations. These fluctuations often persist for multiple respiratory cycles, ultimately leading to deviations in anesthetic dosage, directly affecting the child's anesthesia induction effect and perioperative safety. Therefore, there is an urgent need to design an anesthetic concentration adjustment device specifically for pediatric anesthesia scenarios, along with an emergency intervention mechanism for abnormal concentration fluctuations, to minimize the impact of these fluctuations on the anesthetic effect. Summary of the Invention

[0005] To address the aforementioned problems, this invention provides an anesthesia device that facilitates the adjustment of anesthetic concentration. It utilizes the user's respiratory flow to directly drive a turbine mechanism to regulate the anesthetic steam flow rate and dynamically adjusts the valve opening by monitoring changes in rotational speed in real time, thereby achieving rapid response and dynamic adjustment of anesthetic concentration during sudden changes in respiration.

[0006] To achieve the above objectives, the technical solution of the present invention is as follows: An anesthetic device that facilitates the adjustment of anesthetic concentration includes a dilution gas supply unit, one end of which is connected to an anesthetic vaporizer, the anesthetic vaporizer is provided with an adjustment component for dynamically adjusting the concentration of anesthetic gas, the end of the anesthetic vaporizer away from the dilution gas supply unit is connected to a breathing tube, and the end of the breathing tube away from the anesthetic vaporizer is connected to a mask and a waste gas tank.

[0007] The breathing tube is equipped with a pneumatic component that adjusts according to the flow rate of the user's exhaled gas. The pneumatic component contains a negative pressure output component that adjusts the flow rate of anesthetic vapor. A transmission component is provided between the negative pressure output component and the pneumatic component to transmit the driving force of the pneumatic component to the negative pressure output component. When the amount of the user's exhaled gas increases, the pneumatic component adjusts the negative pressure output component through the transmission component to increase the flow rate of anesthetic vapor, allowing more anesthetic vapor to fill the mask. When the amount of the user's inhaled gas increases, the negative pressure output component adjusts the pneumatic component through the transmission component to increase the negative pressure in the mask for inhaling waste gas.

[0008] The technical principle of the above scheme is as follows: During the induction of anesthetic breathing in children, the airflow generated by respiration drives the pneumatic components, which in turn interact with the negative pressure output components. The transmission component plays a crucial role in power transmission, transferring the power generated by the pneumatic components to the movement of both the pneumatic components and the negative pressure output components. By changing the anesthetic vapor flow rate and the balance between the negative pressure of the exhaust gas through variations in the child's expiratory or inspiratory airflow, an adaptive gas exchange closed-loop system is formed.

[0009] The above approach has the following beneficial effects:

[0010] 1. In traditional anesthetic concentration adjustment techniques, signal control suffers from response delays. This solution, however, employs a mechanical transmission method. The airflow generated by the user's breathing directly drives the pneumatic components, which in turn drive the negative pressure output components, eliminating the need for complex signal processing and shortening response time. When the user's breathing changes, it can react rapidly, adjusting the anesthetic vapor flow rate in a timely manner to synchronize the anesthetic supply with the user's respiratory needs, effectively avoiding problems such as poor anesthetic efficacy caused by response delays.

[0011] 2. In existing technologies, young users may exhibit abnormal breathing patterns, such as rapid breathing or deep breathing. Uneven breathing patterns cause exhaled air to mix with the anesthetic, leading to fluctuations in anesthetic concentration that cannot be well matched to the young user's respiratory rate. This solution establishes a real-time positive correlation matching mechanism between respiratory rate and anesthetic flow rate. When the young user's respiratory rate increases, the anesthetic vapor flow rate increases accordingly through the transmission of various components, ensuring the user inhales a sufficient concentration of anesthetic. When the young user's respiratory rate decreases, the anesthetic vapor flow rate decreases accordingly to avoid anesthetic overdose. This real-time matching mechanism allows the anesthetic concentration to be dynamically adjusted according to the user's respiratory status, maintaining it within a stable range and improving the safety and effectiveness of anesthesia.

[0012] Furthermore, the regulating component includes an evaporation chamber and a dilution trachea. The dilution trachea passes through the anesthesia evaporation tank, with one end connected to the dilution gas supply unit. An inlet pipe is connected to the bottom of the evaporation chamber, and a carrier gas inlet pipe and a carrier gas outlet pipe are connected to the top of the evaporation chamber. A first regulating valve is installed in the carrier gas inlet pipe. The dilution trachea is connected to the carrier gas inlet pipe and the carrier gas outlet pipe from left to right. A second regulating valve is installed in the dilution trachea, located between the carrier gas inlet pipe, the carrier gas outlet pipe, and the dilution trachea.

[0013] Beneficial effects: The regulating component is designed according to the user's anesthesia needs at different stages. Through the design of the first regulating valve and the second regulating valve, the flow rate of carrier gas and dilution gas is adjusted to achieve precise control of the anesthetic concentration.

[0014] Furthermore, the mask includes an oral-nasal mask with an opening. The breathing tube includes an inhalation tube and an exhalation tube. The two ends of the inhalation tube are connected to the dilution air tube and the opening, respectively. The exhalation tube is sleeved on the outside of the inhalation tube, and the two ends of the exhalation tube are connected to the waste gas tank and the opening, respectively.

[0015] Beneficial effects: The design of the exhalation tube and inhalation tube being nested in the gas delivery pipeline can reduce the space required and improve utilization. The independent delivery and discharge pipelines avoid cross-contamination of gases, ensuring the purity and quality of the anesthetic gas delivered to the user.

[0016] Furthermore, an annular connecting block is fused to the inner side of the exhalation tube near the mouth and nose mask. The inner edge of the connecting block is fused to the outer wall of the inhalation tube. Several one-way exhalation valves are evenly embedded in the connecting block circumferentially. A one-way inhalation valve is fused inside the inhalation tube.

[0017] Beneficial effects: The design of the one-way exhalation valve and the one-way inhalation valve limits the exhalation tube and the inhalation tube, reduces the mutual influence between the two tubes with different functions, reduces cross-mixing, and improves the accuracy of anesthetic concentration control.

[0018] Furthermore, the pneumatic assembly includes a sealing ring fixedly connected to the body of the exhalation tube, and a turbine ring with an annular structure is rotatably connected to the inner wall of the sealing ring.

[0019] Beneficial effects: The design of the turbine ring utilizes the airflow generated by the user's breathing to drive the turbine ring to rotate. The rotation speed of the turbine ring reflects the user's exhalation intensity, and the rotation of the turbine ring mechanizes the user's breathing intensity, laying the foundation for subsequent adjustments.

[0020] Furthermore, the negative pressure output assembly includes an internal turbine, which is rotatably connected to the body of the suction pipe.

[0021] Beneficial effects: The internal turbine design drives the flow of anesthetic vapors. Compared to traditional anesthetic vapor inhalation, it reduces the need for a pump and uses the negative pressure generated by the internal turbine rotation to assist the user in inhaling anesthetic vapors, based on the user's spontaneous breathing.

[0022] Furthermore, the transmission assembly includes an outer gear ring fixedly connected to the inner edge of the turbine ring, an inner gear ring fixedly connected to the outer edge of the inner turbine, and a plurality of gear rods uniformly arranged along the circumference of the inner turbine between the inner gear ring and the outer gear ring. The two ends of the gear rods are rotatably connected to the corresponding sidewalls of the suction pipe, and the plurality of gear rods mesh with the inner gear ring and the outer gear ring.

[0023] Beneficial effects: Through the design of the external gear ring, internal gear ring and several gear rods, the internal turbine and turbine ring are linked together, so that the intensity of the user's exhalation is positively correlated with the flow rate of the anesthetic. When the user has an abnormal breathing pattern, the inhalation process corresponds to the accelerated flow rate of the anesthetic vapor. That is, this solution can regulate the uniformity of the user's breathing, so that even if the user has difficulty breathing evenly, the drug can be administered in accordance with the breathing pattern, which can effectively match the drug administration process.

[0024] Furthermore, both sides of the mouth and nose mask are slotted and fixedly connected with elastic bands, and an annular airbag is fixedly connected to the outer edge of the mouth and nose mask. The annular airbag and the exhalation tube are connected through several tracheas.

[0025] Beneficial effects: When the user coughs and exhales more air, the amount of air flowing through the exhalation tube increases, and the corresponding amount of air flowing into the annular airbag also increases. This increases the pressure inside the mouth and nose mask, thereby increasing the volume of the annular airbag, improving the displacement space of the mouth and nose mask, and reducing the risk of leakage.

[0026] Furthermore, a speed sensor is fixedly connected to the inner turbine, and the speed sensor signal is connected to the control system. The first regulating valve and the second regulating valve are both connected to the control system signal.

[0027] Beneficial effects: The rotational speed of the internal turbine is collected by a speed sensor and transmitted to the control system in real time. The control system analyzes whether the user has an abnormal breathing pattern, so as to adjust the release concentration of the anesthetic according to the abnormal breathing pattern.

[0028] Furthermore, the control system includes a speed acquisition module, an acceleration calculation module, and a drive module;

[0029] The speed acquisition module receives the acquisition signal from the speed sensor in real time, converts the signal into the speed of the internal turbine, and then transmits the speed data of the internal turbine to the acceleration calculation module.

[0030] The acceleration calculation module receives the rotational speed data transmitted in real time by the rotational speed acquisition module, calculates the rate of change of rotational speed based on several rotational speed data, and determines whether it exceeds the preset threshold. The preset threshold is set by the anesthesiologist based on the user's body shape, vital signs and respiratory status. Then, the analyzed acceleration value and abnormal indicator signal are transmitted to the drive module.

[0031] The drive module receives the abnormality flag signal and acceleration value from the acceleration calculation module, generates a control signal based on the abnormality flag signal, and adjusts the opening of the first regulating valve and the second regulating valve.

[0032] Beneficial effects: This control system enables automated and intelligent control of the user's respiratory status and anesthetic concentration during anesthesia, significantly improving the accuracy and safety of anesthesia. It can promptly detect and handle abnormal situations during anesthesia, ensuring patient safety and the smooth progress of surgery.

[0033] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0034] Figure 1 This is a schematic diagram of the overall structure of an anesthesia device according to the present invention, which facilitates the adjustment of anesthetic concentration;

[0035] Figure 2 This is a front cross-sectional view of the anesthetic vaporizer in an embodiment of the anesthetic device for easy adjustment of anesthetic concentration according to the present invention;

[0036] Figure 3 This is an axonometric sectional view of the breathing tube in an embodiment of the anesthesia device for easy adjustment of anesthetic concentration according to the present invention;

[0037] Figure 4 This is an isometric view of the mask portion in an embodiment of the anesthesia device of the present invention, which facilitates the adjustment of anesthetic concentration.

[0038] The reference numerals in the accompanying drawings include: 1. Dilution gas supply unit; 101. N2O pipe; 102. O2 pipe; 103. Flow meter; 104. Air pump; 105. Mixing tank; 2. Anesthesia vaporizer; 201. Evaporation chamber; 202. Dilution gas tube; 203. Inlet tube; 204. Carrier gas inlet tube; 205. Carrier gas outlet tube; 206. First regulating valve; 207. Second regulating valve; 3. Breathing tube; 301. Inhalation tube; 302. Exhalation tube; 303. One-way exhalation valve; 304. One-way inhalation valve; 4. Mask unit; 401. Oral and nasal mask; 402. Tube opening; 403. Connecting block; 5. Sealing ring; 6. Turbine ring; 7. Inner turbine; 8. Outer gear ring; 9. Inner gear ring; 10. Gear rod; 11. Hoop; 12. Annular airbag. Detailed Implementation

[0039] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0040] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0041] In the description of this invention, it should be noted that, 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 based on the specific circumstances.

[0042] The following detailed description illustrates the specific implementation method:

[0043] Example 1:

[0044] As attached Figure 1As shown: An anesthesia device for easy adjustment of anesthetic concentration includes a dilution gas supply unit 1, one end of which is connected to an anesthetic vaporizer 2. The dilution gas supply unit 1 includes an N2O pipe 101, an O2 pipe 102, and a mixing tank 105. A flow meter 103 and an electronic proportional valve are installed in both the N2O pipe 101 and the O2 pipe 102. An air pump 104 is installed on both the N2O pipe 101 and the O2 pipe 102. The dilution gas supply unit 1 is equipped with a proportional interlock system for cutting off the gas delivery of the N2O pipe 101 according to the patient's hypoxia. Both the N2O pipe 101 and the O2 pipe 102 are connected to the mixing tank 105.

[0045] Combination Figure 1 and Figure 2 As shown, the anesthetic vaporizer 2 is equipped with a regulating component for dynamically adjusting the concentration of anesthetic gas. Considering the high sensitivity of children to anesthetics (e.g., the MAC value of isoflurane is approximately 1.6% in infants and approximately 1.15% in adults), the regulating component includes an vaporization chamber 201 and a dilution tube 202. The dilution tube 202 passes through the anesthetic vaporizer 2, with one end connected to the mixing tank 105. The bottom of the vaporization chamber 201 is connected to an inlet tube 203, and the top of the vaporization chamber 201 is connected to a carrier gas inlet tube 204 and a carrier gas outlet tube 205. The carrier gas inlet tube 204 is equipped with a first regulating valve 206, which is signal-connected to a control system. The dilution tube 202 is connected to the carrier gas inlet tube 204 from left to right. The carrier gas inlet pipe 204 and the carrier gas outlet pipe 205 are connected. A second regulating valve 207 is installed in the dilution pipe 202. The second regulating valve 207 is located between the carrier gas inlet pipe 204 and the carrier gas outlet pipe 205 and the dilution pipe 202. The second regulating valve 207 is connected to the control system signal. This design is based on a conventional anesthetic vaporizer. Part of the mixed gas in the carrier gas inlet pipe 204 flows through the vaporization chamber 201 carrying saturated anesthetic vapor, and then flows back through the carrier gas outlet pipe 205 to the dilution pipe 202 to mix with another part of the mixed gas to become an airflow containing a certain percentage concentration of anesthetic vapor, which then enters the anesthesia circuit. The participation of the control system adjusts the opening degree of the first regulating valve 206 and the second regulating valve 207, that is, to control the carrier gas flow rate, and thus adjust the percentage concentration of the anesthetic vapor airflow.

[0046] The dilution trachea 202 is connected to the breathing tube 3, combined with Figure 1 and Figure 3As shown, the breathing tube 3 includes an inhalation tube 301 and an exhalation tube 302. The exhalation tube 302 is sleeved on the outside of the inhalation tube 301. One end of the inhalation tube 301 is connected to the dilution tube 202, and the other end of the inhalation tube 301 is provided with a mask part 4. The mask part 4 includes an oropharyngeal mask 401. The oropharyngeal mask 401 has an opening 402. One end of the exhalation tube 302 is fused to the oropharyngeal mask 401 through the opening 402. The other end of the exhalation tube 302 is connected to an exhaust gas canister. A ring-shaped connecting block 403 is fused to the inner side of the end of the exhalation tube 302 near the oropharyngeal mask 401. The inner edge of the connecting block 403 is fused to the outer wall of the inhalation tube 301. Several one-way exhalation valves 303 are evenly embedded in the connecting block 403 circumferentially. A one-way inhalation valve 304 is fused inside the inhalation tube 301.

[0047] In response to the characteristics of pediatric anesthesia, such as crying and rapid, fluctuating breathing, sudden changes in respiratory rate, etc., the increased exhaled air volume of the child can accumulate in the oronasal mask 401, mixing with subsequent anesthetic vapor and affecting its concentration. To reduce the impact of abnormal breathing patterns on anesthetic administration, this design incorporates a pneumatic component on the exhalation tube 302 for adjusting the flow rate of the child's exhaled air. Figure 1 and Figure 3 As shown, the pneumatic assembly includes a sealing ring 5 fused to the body of the exhalation tube 302. The inner wall of the sealing ring 5 is rotatably connected to a ring-shaped turbine ring 6 via a bearing. Under normal conditions, the gas exhaled by the child passes through the turbine ring 6 and drives the turbine ring 6 to rotate. The rotation speed of the turbine ring 6 is positively correlated with the amount of gas exhaled by the child. However, if the rotation speed of the turbine ring 6 does not match the amount of gas exhaled by the child (i.e., the rotation speed of the turbine ring 6 caused by the amount of gas exhaled by the child is less than the current rotation speed of the turbine ring 6), the rotation of the turbine ring 6 will generate negative pressure to draw gas from the mask part 4 through each one-way exhalation valve 303. A negative pressure output assembly for adjusting the flow rate of anesthetic vapor is provided on the body of the inhalation tube 301 at the position corresponding to the sealing ring 5. The negative pressure output assembly includes an inner turbine 7, which is rotatably connected to the body of the inhalation tube 301 via a bearing. The negative pressure generated when the child inhales the anesthetic vapor will cause the inner turbine 7 to rotate. The rotation of the inner turbine 7 will generate negative pressure to draw in the anesthetic vapor.

[0048] What is special is that, since the gas flows in the exhalation tube 302 and the inhalation tube 301 in different directions, the rotation directions of the inner turbine 7 and the turbine ring 6 are also different. To this end, a transmission assembly for mutual transmission between the inner turbine 7 and the turbine ring 6 is designed. The transmission assembly includes an outer gear ring 8 fused to the inner edge of the turbine ring 6, an inner gear ring 9 fused to the outer edge of the inner turbine 7, and a plurality of gear rods 10 uniformly arranged along the circumference of the inner turbine 7 between the inner gear ring 9 and the outer gear ring 8. The two ends of the gear rods 10 are rotatably connected to the sidewalls of the corresponding suction pipes 301, and the plurality of gear rods 10 mesh with the inner gear ring 9 and the outer gear ring 8. This design allows the turbine ring 6 and the inner turbine 7 to rotate in opposite directions, and also makes the rotation of the turbine ring 6 and the inner turbine 7 have a certain connection. This connection is adjusted by designing the transmission ratio of the plurality of gear rods 10 with the outer gear ring 8 and the inner gear ring 9 respectively. That is, when the speed of the turbine ring 6 (or the inner turbine 7) changes, the speed of the corresponding inner turbine 7 (or the turbine ring 6) will change accordingly.

[0049] For example, when a child's breathing becomes rapid, a large amount of air is exhaled in a short period of time. This air accumulates in the mask section 4 and mixes with the subsequent anesthetic vapor, thus affecting the concentration of the anesthetic. When this air enters the exhalation tube 302 through the one-way exhalation valves 303, compared to the amount and flow rate of exhaled air during even breathing, the amount of air in the exhalation tube 302 increases, and the gas flow rate accelerates, thereby increasing the rotational speed of the turbine ring 6. At this time, through the transmission action of the external gear ring 8, the internal gear ring 9, and several gear rods 10, the rotational speed of the internal turbine 7 affects... The flow rate of anesthetic vapor into the mask section 4 should be increased accordingly. On the one hand, this achieves a positive correlation between the amount of exhaled gas and the flow rate of anesthetic vapor. Compared with the method of controlling by collecting signals from the controller through sensors, this design can reduce the response time. On the other hand, when the child's breathing is uneven, with large exhalations and small inhalations, the inhalation process corresponds to the increased flow rate of anesthetic vapor. That is, this solution can regulate the child's breathing uniformity, so that even if the child has difficulty breathing evenly, the medication can be administered in accordance with the breathing pattern, which can effectively match the medication process.

[0050] The following tests were conducted based on the anesthesia device described in this embodiment:

[0051] 1. Experimental objective: To verify the device's ability to regulate concentration response in scenarios of sudden respiratory changes such as coughing and crying in children.

[0052] 2. Subjects: 20 children aged 1-3 years undergoing elective surgery (weighing 10-15kg).

[0053] 3. Simulated Scenario:

[0054] Normal breathing (tidal volume 80-150mL, frequency 20 breaths / min) for 5 minutes;

[0055] Sudden crying (tidal volume 160-300mL, frequency 35 times / min, lasting 20 seconds);

[0056] Violent cough (tidal volume 360 ​​mL, lasting 3 seconds).

[0057] 4. Data Collection:

[0058] Concentration monitoring: The isoflurane concentration at the mask is recorded in real time by an infrared spectrometer (sampling frequency 10Hz);

[0059] Response time: Record the time from respiratory mutation to concentration stabilization (±0.3% of target concentration);

[0060] Face mask sealing: Pressure sensor monitors the internal pressure of the annular airbag 12 and calculates the leakage rate (≤5% is acceptable).

[0061] Experimental data:

[0062]

[0063] Note: The dosing error integral = ∫|actual concentration - target concentration|dt, which reflects the cumulative concentration deviation.

[0064] Experimental Conclusion: The anesthesia device described in this embodiment directly drives the anesthetic flow rate adjustment through turbine mechanical linkage, reducing the response time to 0.8 seconds (compared to 3.2 seconds for the conventional system). This verifies that the anesthesia device described in this embodiment can reduce the impact of concentration fluctuations caused by electronic system delays. The peak concentration fluctuation decreased from ±18% to ±6%, and the fluctuation period was shortened from 4.5 breaths to 1.2 breaths.

[0065] Example 2:

[0066] As attached Figure 4 As shown, the difference from Example 1 is that during the process of abnormal breathing patterns such as coughing in children, there is usually a risk of the oronasal mask 401 falling off. When the oronasal mask 401 falls off, the concentration of the anesthetic will be affected when the outside air mixes with the anesthetic vapor. To address this, the oronasal mask 401 is designed with slots on both sides to be fixedly connected with elastic bands 11. An annular airbag 12 is adhered to the outer edge of the oronasal mask 401. During the administration of anesthesia, the annular airbag 12 is in close contact with the child's face. The annular airbag 12 is connected to the exhalation tube 302 through several tracheas. When the child coughs and exhales more air, the amount of air flowing in the exhalation tube 302 increases, and the corresponding amount of air flowing into the annular airbag 12 also increases. This increases the pressure inside the oronasal mask 401 (i.e., the amount of air inside the oronasal mask 401 increases, increasing the risk of falling off). As a result, the volume of the annular airbag 12 increases, increasing the displacement space of the oronasal mask 401 and reducing the risk of leakage.

[0067] Example 3:

[0068] like Figure 2 As shown, the difference from Embodiment 2 is that a speed sensor is fixedly connected to the inner turbine 7 by screws, the speed sensor is connected to the control system signal, and the first regulating valve 206 and the second regulating valve 207 are both connected to the control system signal.

[0069] The control system includes a speed acquisition module, an acceleration calculation module, and a drive module.

[0070] The speed acquisition module receives the acquisition signal from the speed sensor in real time, converts it into the speed of the inner turbine 7 through an analog-to-digital converter (ADC), performs filtering to eliminate mechanical vibration noise, and transmits the speed data of the inner turbine 7 to the acceleration calculation module to provide a reliable basis for subsequent analysis.

[0071] The acceleration calculation module receives the rotational speed data transmitted in real time by the rotational speed acquisition module, calculates the rate of change of rotational speed (i.e., the acceleration of rotational speed) through a differential algorithm, and determines whether it exceeds a preset threshold. The preset threshold is set by the anesthesiologist based on the child's body shape, signs and respiratory status. Then, the analyzed acceleration value and abnormal indicator signal are transmitted to the drive module. This design is conducive to the real-time identification of the child's abnormal breathing pattern.

[0072] The drive module receives the abnormal flag signal and acceleration value from the acceleration calculation module, generates a control signal based on the abnormal flag signal, and adjusts the opening of the first regulating valve 206 and the second regulating valve 207; thereby achieving closed-loop control of the anesthetic concentration and reducing the fluctuation range of the anesthesia machine concentration.

[0073] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the scope of protection of this invention.

Claims

1. An anesthesia device for easy adjustment of anesthetic concentration, comprising a dilution gas supply unit (1), one end of which is connected to an anesthetic vaporizer (2), characterized in that, The anesthetic vaporizer (2) is equipped with a regulating component for dynamically adjusting the concentration of anesthetic gas. The end of the anesthetic vaporizer (2) away from the dilution gas supply unit (1) is connected to a breathing tube (3). The end of the breathing tube (3) away from the anesthetic vaporizer (2) is connected to a mask unit (4) and a waste gas tank. The breathing tube (3) is equipped with a pneumatic component for adjusting the flow rate of the user's exhaled gas. The pneumatic component is equipped with a negative pressure output component for adjusting the flow rate of anesthetic vapor. A transmission component is provided between the negative pressure output component and the pneumatic component for transmitting the driving force of the pneumatic component to the negative pressure output component. When the amount of the user's exhaled gas increases, the pneumatic component adjusts the negative pressure output component through the transmission component to increase the flow rate of anesthetic vapor, so that more anesthetic vapor fills the mask part (4). When the amount of the user's inhaled gas increases, the negative pressure output component adjusts the pneumatic component through the transmission component to increase the negative pressure in the mask part (4) for absorbing waste gas.

2. The anesthesia device for easily adjusting the concentration of anesthetic agent according to claim 1, characterized in that, The regulating assembly includes an evaporation chamber (201) and a dilution tube (202). The dilution tube (202) passes through the anesthesia evaporation tank (2). One end of the dilution tube (202) is connected to the dilution gas supply unit (1). The bottom of the evaporation chamber (201) is connected to an inlet tube (203). The top of the evaporation chamber (201) is connected to a carrier gas inlet tube (204) and a carrier gas outlet tube (205). A first regulating valve (206) is provided in the carrier gas inlet tube (204). The dilution tube (202) is connected to the carrier gas inlet tube (204) and the carrier gas outlet tube (205) from left to right. A second regulating valve (207) is provided in the dilution tube (202). The second regulating valve (207) is located between the carrier gas inlet tube (204) and the carrier gas outlet tube (205) and the dilution tube (202).

3. The anesthesia device for easily adjusting the concentration of anesthetic agent according to claim 2, characterized in that, The mask part (4) includes a mouth and nose mask (401), and the mouth and nose mask (401) has an opening (402). The breathing tube (3) includes an inhalation tube (301) and an exhalation tube (302). The two ends of the inhalation tube (301) are connected to the dilution air tube (202) and the opening (402) respectively. The exhalation tube (302) is sleeved on the outside of the inhalation tube (301), and the two ends of the exhalation tube (302) are connected to the waste gas tank and the opening (402) respectively.

4. The anesthesia device for easily adjusting the concentration of anesthetic agent according to claim 3, characterized in that, A ring-shaped connecting block (403) is fused to the inner side of the exhalation tube (302) near the mouth and nose mask (401). The inner edge of the connecting block (403) is fused to the outer wall of the inhalation tube (301). Several one-way exhalation valves (303) are evenly embedded in the connecting block (403) circumferentially. A one-way inhalation valve (304) is fused inside the inhalation tube (301).

5. The anesthesia device for easily adjusting the concentration of anesthetic agent according to claim 4, characterized in that, The pneumatic assembly includes a sealing ring (5) fixedly connected to the body of the exhalation tube (302), and a turbine ring (6) with an annular structure is rotatably connected to the inner wall of the sealing ring (5).

6. The anesthesia device for easily adjusting the concentration of anesthetic agent according to claim 5, characterized in that, The negative pressure output assembly includes an inner turbine (7), which is rotatably connected to the body of the suction pipe (301).

7. The anesthesia device for easily adjusting the concentration of anesthetic agent according to claim 6, characterized in that, The transmission assembly includes an outer gear ring (8) fixedly connected to the inner edge of the turbine ring (6), an inner gear ring (9) fixedly connected to the outer edge of the inner turbine (7), and a plurality of gear rods (10) evenly arranged between the inner gear ring (9) and the outer gear ring (8) along the circumference of the inner turbine (7). The two ends of the gear rods (10) are rotatably connected to the side wall of the corresponding suction pipe (301), and the plurality of gear rods (10) mesh with the inner gear ring (9) and the outer gear ring (8).

8. The anesthesia device for easily adjusting the concentration of anesthetic agent according to claim 7, characterized in that, The mouth and nose mask (401) has grooves on both sides and is fixedly connected with elastic bands (11). The outer edge of the mouth and nose mask (401) is fixedly connected with an annular airbag (12). The annular airbag (12) and the exhalation tube (302) are connected through several tracheas.

9. The anesthesia device for easily adjusting the concentration of anesthetic agent according to claim 8, characterized in that, A speed sensor is fixedly connected to the internal turbine (7), and the speed sensor signal is connected to the control system. The first regulating valve (206) and the second regulating valve (207) are both connected to the control system signal.

10. The anesthesia device for easily adjusting the concentration of anesthetic agent according to claim 9, characterized in that, The control system includes a speed acquisition module, an acceleration calculation module, and a drive module; The speed acquisition module receives the acquisition signal from the speed sensor in real time, converts the signal into the speed of the inner turbine (7), and then transmits the speed data of the inner turbine (7) to the acceleration calculation module. The acceleration calculation module receives the rotational speed data transmitted in real time by the rotational speed acquisition module, calculates the rate of change of rotational speed based on several rotational speed data, and determines whether it exceeds the preset threshold. The preset threshold is set by the anesthesiologist based on the user's body shape, vital signs and respiratory status. Then, the analyzed acceleration value and abnormal indicator signal are transmitted to the drive module. The drive module receives the abnormal flag signal and acceleration value from the acceleration calculation module, generates a control signal based on the abnormal flag signal, and adjusts the opening of the first regulating valve (206) and the second regulating valve (207).

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