Inhalation anesthetic metering control device and use method thereof

Abstract

The invention relates to the field of medical technical equipment, in particular to an inhaled anesthetic metering control device which comprises a shell, the shell comprises an air inlet and an air outlet, a gas channel is communicated between the air inlet and the air outlet, a liquid medicine vaporizer is arranged in the shell, and the gas channel is divided into an upper channel and a lower channel by the liquid medicine vaporizer; the upper channel and the shell are provided with a concentration control mechanism in a penetrating mode, a floating ball metering mechanism and a liquid medicine bin are arranged in the lower channel, and the floating ball metering mechanism is slidably connected with a liquid medicine vaporizer. The gas channel is divided into an upper part and a lower part by the liquid medicine vaporizer, the upper channel is used for mixing oxygen with external gas introduced by the concentration control mechanism, and the lower channel is used for enabling the oxygen to carry vaporized anesthetic gas, so that an up-down separated gas flow path is formed. The floating ball metering mechanism can monitor the use condition of the liquid medicine in real time and meter the liquid medicine; and the concentration adjusting mechanism can be used for adjusting the concentration of the anesthetic in the mixed gas reaching the gas outlet in time.

Description

Technical Field

[0001] The present invention relates to the field of medical technical equipment, and particularly relates to an inhaled anesthetic dosage control device and a using method thereof. Background Art

[0002] As an important means of modern surgical anesthesia, the inhaled anesthesia technique has the advantages of rapid onset, controllable concentration, reversible action, and fast postoperative recovery, and is widely used in various types of surgeries. By vaporizing the liquid anesthetic into a gaseous state and mixing it with oxygen, the patient can quickly achieve an anesthetic effect after inhalation. This method is not only applicable to general anesthesia but also enables precise analgesia and sedation management under monitoring conditions. With the increasing complexity of surgeries, higher requirements are put forward for the accuracy and safety of the inhaled anesthesia technique. Especially in long-term or high-risk surgeries, the dynamic regulation of anesthetic concentration is particularly important for the anesthetic effect and patient safety.

[0003] However, the current inhaled anesthesia devices still face many problems in dosage control. On the one hand, there is a lack of real-time monitoring of the consumption of anesthetic liquid and the output concentration, making it difficult for medical staff to master the actual usage of the liquid and increasing the uncertainty of anesthesia management. On the other hand, the instability of the liquid vaporization process and the inaccuracy of the mixed gas flow regulation may cause the anesthetic concentration to be too high or too low, affecting the anesthetic depth of the patient. In addition, the existing devices generally lack a fine separation design for the anesthetic liquid and gas delivery paths, which is prone to causing airflow interference and thus affecting the consistency and stability of the anesthetic effect. Summary of the Invention

[0004] The present invention aims to provide an inhaled anesthetic dosage control device and a using method thereof to solve the above technical problems.

[0005] To achieve the above object, the technical solutions adopted by the present invention are as follows: An inhaled anesthetic dosage control device includes a housing, the housing includes an air inlet and an air outlet, a gas channel is communicated between the air inlet and the air outlet, a liquid vaporizer is provided inside the housing, and the liquid vaporizer divides the gas channel into an upper channel and a lower channel; a concentration control mechanism penetrating the upper channel is provided at the top of the housing, a liquid medicine bin is located at the position corresponding to the lower part of the liquid vaporizer in the lower channel, and a float metering mechanism is provided in the liquid medicine bin, and the float metering mechanism is slidably connected to the liquid vaporizer.

[0006] Further, the concentration control mechanism includes a driving component, a transmission component, and a control valve component connected in sequence. The driving component is movably connected to the top of the housing, the driving component is connected to the control valve component through a plurality of transmission components, and the control valve component slidably penetrates the housing and the upper channel.

[0007] Further, the driving assembly includes a driving gear and a gear disc that mesh with each other. Both the driving gear and the gear disc are rotatably connected to the housing. A toothed ring is provided at the bottom of the gear disc, and the toothed ring is connected to the transmission assembly.

[0008] Further, the transmission assembly includes a screw drive and a transmission rod. The screw drive is rotatably connected to one end of the transmission rod, and the other end of the transmission rod is rotatably connected to the control valve assembly; the screw drive meshes with the toothed ring.

[0009] Further, the screw drive includes a transmission gear that meshes with the toothed ring; it also includes a threaded rod. One end of the threaded rod is connected to the transmission gear. A threaded sleeve is provided on the threaded rod, and a limit bolt is provided at the other end of the threaded rod. The threaded sleeve is connected to a connection block, and the connection block is slidably connected to the housing and rotatably connected to the transmission rod.

[0010] Further, the control valve assembly includes an adjustment cylinder. The top of the adjustment cylinder is rotatably connected to the transmission rod; a sleeve is provided through the housing, and the adjustment cylinder is slidably disposed within the sleeve; an adjustment hole is provided through the side wall of the adjustment cylinder, and a filter hole that cooperates with the adjustment hole is provided on the sleeve.

[0011] Further, a vaporization rod is provided at the bottom of the liquid medicine vaporizer. The vaporization rod passes through the liquid medicine chamber and is connected to the housing.

[0012] Further, the float metering mechanism includes a float and a metering scale line. The float is slidably sleeved on the vaporization rod, and more than two float rods are evenly and rotatably connected to the float; the metering scale line is provided on the outer wall of the liquid medicine chamber.

[0013] Further, the present invention also provides a method for using the inhalation anesthetic metering control device as described above, including the following steps: S1: Connect oxygen to the air inlet and connect the air outlet to the patient's respiratory tract. Oxygen passes through the gas passage into the patient's respiratory system. S2: Open the liquid medicine vaporizer to vaporize the anesthetic liquid medicine in the liquid medicine chamber. S3: Oxygen passes through the lower channel and brings the vaporized anesthetic vapor into the patient's respiratory system for anesthesia. S4: Measure the dosage and usage speed of the liquid medicine in the liquid medicine chamber through the float metering mechanism. S5: Open and adjust the concentration control mechanism. External gas enters the upper channel from the concentration control mechanism, and controllably dilutes the concentration of the anesthetic vapor reaching the air outlet.

[0014] The present invention has the following beneficial effects: 1. Through the separate design of the upper and lower channels and the precise adjustment function of the concentration control mechanism, the present invention makes the adjustment of the concentration of anesthetic vapor more efficient. Medical staff only need to simply adjust the concentration through the driving component of the concentration control assembly to meet the different surgical requirements. At the same time, the intuitive liquid level display of the float metering mechanism and the real-time monitoring of the air flow velocity instrument make the operation process simpler, reduce complex manual adjustment steps, and greatly improve work efficiency.

[0015] 2. By adopting the precise design of the control valve assembly and the adjustment cylinder, combined with the gear and screw drive system, it can achieve precise adjustment of the external gas flow rate and the concentration of anesthetic vapor. The concentration control is not only flexible but also highly stable, and can quickly adapt to the anesthetic needs of different patients, ensuring that the intraoperative anesthetic depth always remains within the ideal range.

[0016] 3. The float metering mechanism combined with the transparent or semi-transparent scale line design can display the remaining amount and consumption speed of the anesthetic liquid in the liquid medicine tank in real time. At the same time, the multi-float rod structure of the float design can effectively correct the metering error caused by the inclination of the housing or the liquid fluctuation, provide accurate liquid level data, avoid insufficient liquid medicine or waste, and improve the use efficiency of the liquid medicine.

[0017] 4. The liquid medicine vaporizer ensures the uniformity and stability of the liquid medicine vaporization process through the slowly heated vaporization rod. The design of the air flow path with separate upper and lower channels of the device effectively avoids air flow interference, makes the output of the anesthetic vapor concentration more stable, ensures the consistency of the anesthetic effect on patients, and avoids fluctuations in the intraoperative anesthetic depth.

[0018] 5. The bottom of the adjustment cylinder of the device is designed with a closed strip and a spring-enhanced sealing structure, which effectively prevents the leakage of external gas and the volatilization of the liquid medicine. The filter holes can not only filter dust and impurities in the external gas but also ensure the cleanliness of the gas inhaled by the patient, further improving the safety of the device operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The specification drawings forming a part of this application are used to provide a further understanding of the present invention. The schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings: Figure 1 is a schematic structural diagram of the inhaled anesthetic metering and control device of the present invention; Figure 2 is a top view of the inhaled anesthetic metering and control device of the present invention; Figure 3 is a cross-sectional view of the inhaled anesthetic metering and control device of the present invention; Figure 4 is Figure 3 an enlarged schematic view of part A in Figure 5A cross-sectional view of another perspective of the inhalation anesthetic dosage control device of the present invention; Figure 6 A schematic structural diagram of the concentration control mechanism of the present invention; Figure 7 A schematic structural diagram of the housing of the present invention; Figure 8 A top view of the housing of the present invention; Figure 9 A cross-sectional view of the housing of the present invention; Figure 10 A schematic structural diagram of the toothed ring of the present invention; Figure 11 is Figure 10 An enlarged schematic diagram of part B in Figure 12 A schematic structural diagram of the screw drive of the present invention; Figure 13 A schematic structural diagram of the drive assembly and the control valve assembly of the present invention; Figure 14 A schematic structural diagram of the adjusting cylinder of the present invention; Figure 15 A schematic structural diagram of the float metering mechanism of the present invention; Figure 16 A schematic structural diagram of the float of the present invention; Wherein: 1. Housing; 11. Air inlet; 12. Air outlet; 13. Gas channel; 131. Upper channel; 132. Lower channel; 14. Sleeve; 141. Filter hole; 2. Liquid medicine vaporizer; 21. Vaporizing rod; 3. Concentration control mechanism; 31. Driving assembly; 311. Driving gear; 312. Gear disc; 3121. Toothed ring; 32. Transmission assembly; 321. Screw drive; 3211. Transmission gear; 3212. Screw rod; 3213. Thread sleeve; 3214. Limit bolt; 3215. First spring; 3216. Connecting block; 3217. Limit platform; 322. Transmission rod; 33. Control valve assembly; 331. Adjusting cylinder; 3311. Adjusting hole; 3312. Sealing strip; 3313. Second spring; 4. Float metering mechanism; 41. Float; 42. Metering scale line; 43. Float rod; 5. Liquid medicine bin. Detailed implementation manners

[0020] In order to enable those of ordinary skill in the art to better understand the technical solutions of the present invention, the technical solutions of the present invention will be further described below with reference to the accompanying drawings and embodiments.

[0021] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "front end", "rear end", "inner side", "outer side", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the present invention.

[0022] In the description of the present application, it should also be noted that unless otherwise clearly specified and limited, the terms "set", "installed", "connected", "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0023] Embodiment 1: In this embodiment, an inhalation anesthetic dosage control device, as Figures 1 to 16 shown, includes a housing 1. The housing 1 includes an air inlet 11 and an air outlet 12. A gas channel 13 is communicated between the air inlet 11 and the air outlet 12. A liquid medicine vaporizer 2 is provided in the housing 1. The liquid medicine vaporizer 2 divides the gas channel 13 into an upper channel 131 and a lower channel 132. A concentration control mechanism 3 is provided through the upper channel 131 and the housing 1. A float metering mechanism 4 and a liquid medicine bin 5 are provided in the lower channel 132. The float metering mechanism 4 is slidably connected to the liquid medicine vaporizer 2. The liquid medicine vaporizer 2 divides the gas channel 13 into upper and lower parts. The upper channel 131 is used to mix oxygen with the external gas introduced by the concentration control mechanism 3. The lower channel 132 is used to make oxygen carry the vaporized anesthetic gas, forming an upper and lower separated air flow path, and at the same time facilitating the independent setting of the concentration control mechanism 3 and the float metering mechanism 4, improving the stability of the anesthetic effect. Through the float metering mechanism 4, the usage of the liquid medicine can be monitored in real time and metered; the concentration control mechanism 3 can be used to timely adjust the concentration of the anesthetic in the mixed gas reaching the air outlet 12.

[0024] Specifically, in this embodiment, an instrument for real-time detecting the air flow velocity is provided at the air outlet 12; part of the space of the housing 1 and the lower channel 132 is used as the liquid medicine bin 5, and a medicine adding port for adding anesthetic liquid to the liquid medicine bin 5 is provided on the side wall of the housing 1.

[0025] Furthermore, the concentration control mechanism 3 includes a driving component 31, a transmission component 32, and a control valve component 33 that are connected in sequence. The driving component 31 is movably connected to the top of the housing 1, and the control valve component 33 slidably penetrates the housing 1 and the upper channel 131. By setting the concentration control mechanism 3, the precise introduction of external gas and the adjustment of the gas concentration in the upper channel 131 are realized. The driving component 31 provides power for concentration adjustment, the transmission component 32 transmits the power to the control valve component 33, and finally, the control valve component 33 adjusts the flow rate of the external gas entering the upper channel 131, thereby realizing the control of the anesthetic vapor concentration and meeting different anesthesia requirements.

[0026] Furthermore, the driving component 31 includes a driving gear 311 and a gear disc 312 that mesh with each other. The driving gear 311 and the gear disc 312 are both rotatably connected to the housing 1. A toothed ring 3121 is provided at the bottom of the gear disc 312, and the toothed ring 3121 is connected to the transmission component 32. The meshing of the driving gear 311 and the gear disc 312 realizes power transmission and adjustment flexibility. The toothed ring 3121 at the bottom of the gear disc 312 is connected to the transmission component 32. By adjusting the rotation and direction of the driving gear 311, precise control of the transmission component 32 can be achieved, thereby ensuring the stability and efficiency of concentration adjustment.

[0027] Furthermore, the transmission component 32 includes a screw driver 321 and a transmission rod 322. The screw driver 321 is rotatably connected to one end of the transmission rod 322, and the other end of the transmission rod 322 is rotatably connected to the control valve component 33. The screw driver 321 meshes with the toothed ring 3121. The screw driver 321 meshes with the toothed ring 3121 to transmit the power of the toothed ring 3121 that follows the rotation of the gear disc 312 to the screw driver 321. Furthermore, the screw driver 321 transmits the power to the transmission rod 322 to realize the control of the control valve component 33, so that the control valve component 33 can accurately adjust the flow rate of the gas passage 13. The screw driver 321 connects the transmission rod 322 to the control valve component 33, and uses the screw transmission principle to achieve transmission accuracy and smooth transition of power.

[0028] Further, the control valve assembly 33 includes an adjustment cylinder 331. The top of the adjustment cylinder 331 is rotatably connected to a transmission rod 322. A sleeve 14 penetrates through the housing 1. The adjustment cylinder 331 is slidably disposed within the sleeve 14. An adjustment hole 3311 penetrates through the side wall of the adjustment cylinder 331, and a filter hole 141 that cooperates with the adjustment hole 3311 is provided on the sleeve 14. The adjustment cylinder 331 is slidably installed within the sleeve 14, and the adjustment hole 3311 and the filter hole 141 cooperate. When the two coincide, the outside gas can enter the upper channel 131 within the housing 1 from the adjustment cylinder 331, and then dilute the anesthetic vapor at the air outlet 12. The larger the area of the overlapping part of the two, the greater the flow rate of the outside gas introduced. By controlling the up and down position of the adjustment cylinder 331 through the driving assembly 31 and the transmission assembly 32, the area of the overlapping part of the adjustment hole 3311 and the filter hole 141 can be precisely controlled. Through conventional experiments, the scale of the position and the flow rate of the outside gas introduced can be specifically set. When the oxygen flow rate at the air inlet 11 is limited and the power of the liquid medicine vaporizer 2 is fixed, the anesthetic concentration of the anesthetic vapor at the air outlet 12 can also be correspondingly adjusted. Specifically, the outside gas introduced into the control valve assembly 33 can be air, oxygen, etc. When general outside air is introduced, the filter hole 141 can provide the effect of filtering dust.

[0029] Further, a sealing strip 3312 is provided at the bottom opening of the adjustment cylinder 331. A second spring 3313 is provided between the sealing strip 3312 and the housing 1. The second spring 3313 is slidably sleeved outside the adjustment cylinder 331. By providing the sealing strip 3312 at the bottom of the adjustment cylinder 331, the sealing performance of the adjustment cylinder 331 when it is not lifted by the transmission mechanism can be improved.

[0030] Embodiment 2: On the basis of Embodiment 1, in Embodiment 2, further, the screw drive 321 includes a drive gear 3211 and a threaded rod 3212. The drive gear meshes with the toothed ring 3121. One end of the threaded rod 3212 is connected to the drive gear 3211. A threaded sleeve 3213 is provided on the threaded rod 3212. A limit bolt 3214 is provided at the other end of the threaded rod 3212. A first spring 3215 is provided on the limit bolt 3214. The threaded sleeve 3213 is connected to a connection block 3216. Both the connection block 3216 and the first spring 3215 are slidably sleeved on the threaded rod 3212. The first spring 3215 abuts against the connection block 3216. A limit platform 3217 is provided at the bottom of the connection block 3216. The limit platform 3217 slidably abuts against the housing 1. The connection block 3216 is rotatably connected to the drive rod 322. Specifically, a limit groove cooperating with the limit platform 3217 is provided on the housing 1. The limit groove is used to enable the limit platform 3217 to slide only in the radial direction of the toothed ring 3121, that is, the limit platform 3217 can only move back and forth and cannot rotate around the toothed ring 3121. When the drive gear 3211 and the threaded rod 3212 rotate, due to the limitation of the limit platform 3217 on the connection block 3216, the threaded sleeve 3213 connected to the connection block 3216 moves inward under the rotation of the threaded rod 3212, and at the same time, the connection block 3216 slides inward. Since the connection block 3216 is rotatably connected to the drive rod 322, when the connection block 3216 moves inward, it will push the drive rod 322 to change its angle, and then the drive rod 322 will lift the adjustment cylinder 331 of the control valve assembly 33, thereby realizing the conversion of the rotation of the drive gear 3211 into the up and down displacement of the adjustment cylinder 331.

[0031] Embodiment 3: On the basis of Embodiment 1 or 2, in Embodiment 3, further, a vaporization rod 21 is provided at the bottom of the liquid medicine vaporizer 2. The vaporization rod 21 passes through the liquid medicine bin 5 and is connected to the housing 1. Specifically, the liquid medicine vaporizer 2 adopts the prior art and slowly vaporizes the liquid medicine by means of slow heating. The vaporization rod 21 is equivalent to a heating rod. The vaporization rod 21 passes through the liquid medicine bin 5 to slowly vaporize the internal anesthetic liquid medicine.

[0032] Further, the float metering mechanism 4 includes a float 41 and a metering scale line 42. The float 41 is slidably sleeved on the vaporization rod 21. More than two float rods 43 are evenly and rotatably connected to the float 41; the metering scale line 42 is provided on the outer wall of the liquid medicine bin 5. The metering scale line 42 is a transparent or semi-transparent scale, which can display the liquid level of the anesthetic liquid medicine in the liquid medicine bin 5 at the corresponding position; the float 41 and multiple float rods 43 can detect the inclination direction and slope of the liquid level. When the housing 1 is not horizontal, the influence on the liquid level height at the metering scale line 42 will cause errors, and the errors can be calculated through the detected inclination direction and slope of the liquid level. At the same time, the metering errors caused by the fluctuation of the liquid medicine can also be avoided.

[0033] Working principle: The working principle of the inhaled anesthetic metering control device is based on the synergistic effect of the separation design of the gas channel, liquid vaporization, concentration adjustment and real-time metering function, as follows: 1. Separation path of gas channel The gas channel 13 inside the device is divided into an upper channel 131 and a lower channel 132 by the liquid medicine vaporizer 2: the upper channel 131 is connected to the concentration control mechanism 3, and is used to introduce external gas (such as oxygen or air) and mix it with oxygen. The lower channel 132 is connected to the liquid medicine vaporizer 2, and is used to carry the vaporized anesthetic vapor and deliver it to the patient's respiratory system together with oxygen. This upper and lower separation design effectively avoids airflow interference and realizes the precise allocation of anesthetic vapor and external gas.

[0034] 2. Liquid vaporization The liquid medicine vaporizer 2 slowly vaporizes the liquid anesthetic in the liquid medicine tank 5 through a slow heating device (such as a vaporizing rod 21). The vaporized anesthetic vapor is carried to the gas outlet 12 by the oxygen flow of the lower channel 132. The vaporization speed of the liquid medicine is determined by the heater power, and the oxygen flow rate is coordinated to ensure the stability of the concentration of the vaporized anesthetic vapor.

[0035] 3. Concentration control The concentration control mechanism 3 is composed of a driving component 31, a transmission component 32 and a control valve component 33. The regulating cylinder 331 is connected to the upper channel 131, and the amount of external gas (such as air or oxygen) introduced is changed by cooperating with the regulating hole 3311 on the regulating cylinder 331 and the filter hole 141 on the housing 1. By adjusting the rotation angle of the driving component 31 (gear plate 312), the transmission component 32 pushes the regulating cylinder 331 to slide up and down. The movement of the regulating cylinder 331 changes the overlapping area of ​​the regulating hole 3311 and the filter hole 141, thereby adjusting the inflow flow of external gas, thereby diluting the concentration of anesthetic vapor. Accurate control of the concentration of anesthetic vapor in the mixed gas is achieved.

[0036] 4. Liquid metering The float 41 is slidably mounted on the vaporizing rod 21 and floats with the liquid level. The outer wall of the liquid medicine tank 5 is provided with a transparent or translucent metering scale 42 for displaying the liquid level, so as to facilitate real-time monitoring of the consumption of the liquid medicine. The float 41 and the metering scale 42 are combined to provide intuitive data on the remaining amount of liquid medicine and the consumption rate. The multi-floating rod 43 design can monitor the inclination direction and slope of the liquid level and correct the metering error caused by the non-levelness of the shell 1 or the fluctuation of the liquid.

[0037] 5. Gas output After the oxygen and the outside gas are mixed by adjusting the concentration, they are combined with the anesthetic vapor vaporized by the liquid vaporizer 2 at the gas outlet 12 and delivered to the patient's respiratory system. An air flow velocity meter is provided at the gas outlet 12 to monitor the gas output flow rate in real time to ensure the stability of the flow rate.

[0038] 6. Synergistic Effect of Core Mechanisms Airflow Transportation: Oxygen serves as a carrier to distribute anesthetic vapor and external gas through the upper channel 131 and the lower channel 132.

[0039] Concentration Regulation: By controlling the flow rate of external gas, the concentration of anesthetic vapor can be flexibly adjusted.

[0040] Real-time Monitoring: The float metering mechanism 4 and the airflow velocity meter provide real-time data on the liquid medicine consumption and gas flow rate.

[0041] Stable Output: The separate design of the upper and lower channels and the precise regulation mechanism ensure the stability of the output concentration of anesthetic gas.

[0042] Specific Application Cases: During conventional general anesthesia surgeries, it is necessary to precisely control the depth of anesthesia of the patient to ensure painlessness and safety during the surgical process. To avoid the burden on the patient caused by excessive anesthetic and to ensure the balance of the ratio of oxygen and anesthetic vapor, medical staff can use the inhalation anesthetic metering and control device of the present invention to perform real-time regulation on the concentration of anesthetic gas. The application method steps are as follows: 1. Equipment Preparation Connect the air inlet 11 of the inhalation anesthetic metering and control device to the oxygen supply pipe to ensure a stable oxygen flow rate. Connect the air outlet 12 to the patient's tracheal intubation or breathing mask through the breathing circuit.

[0043] 2. Start the Liquid Medicine Vaporizer Open the liquid medicine vaporizer 2, start the slow heating function, and vaporize the anesthetic liquid medicine in the liquid medicine bin 5 of the device. Ensure the stability of the liquid medicine vaporization process, and confirm the consumption amount of the liquid medicine by observing the float metering mechanism 4.

[0044] 3. Anesthetic Concentration Adjustment After the patient enters the anesthetic state, set the position of the adjustment cylinder 331 of the concentration control mechanism 3, and gradually introduce an appropriate amount of external gas (air or oxygen) through the upper channel 131 to dilute the concentration of anesthetic vapor.

[0045] 4. Real-time Monitoring and Adjustment During the surgical process, medical staff detect the consumption speed and remaining amount of the liquid medicine through the float metering mechanism 4. According to the depth of anesthesia of the patient, adjust the concentration control mechanism 3 in a timely manner, increase or decrease the proportion of external gas, and achieve precise regulation.

[0046] 5. Postoperative Concentration Reduction When the surgery is about to end, gradually increase the proportion of external gas through the concentration control mechanism 3 to reduce the concentration of anesthetic vapor until the patient's spontaneous breathing resumes. Turn off the liquid medicine vaporizer 2 and stop the vaporization of the anesthetic liquid medicine.

[0047] The foregoing has shown and described the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments, and what is described in the above embodiments and the specification only illustrates the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of the present invention claimed is defined by the appended claims and their equivalents.

Claims

1. An inhaled anesthetic metering control device, comprising a housing (1), wherein the housing (1) comprises an air inlet (11) and an air outlet (12), characterized in that: A gas channel (13) is connected between the gas inlet (11) and the gas outlet (12); a liquid medicine vaporizer (2) is provided in the shell (1); the liquid medicine vaporizer (2) separates the gas channel (13) into an upper channel (131) and a lower channel (132); The top of the shell (1) is provided with a concentration control mechanism (3) penetrating the upper channel (131); the position corresponding to the lower channel (132) and below the liquid medicine vaporizer (2) is a liquid medicine bin (5); a float metering mechanism (4) is provided in the liquid medicine bin (5); and the float metering mechanism (4) is slidably connected to the liquid medicine vaporizer (2).

2. The inhalation anesthetic metering control device according to claim 1, characterized in that: The concentration control mechanism (3) comprises a driving assembly (31), a transmission assembly (32) and a control valve assembly (33) which are connected in sequence, wherein the driving assembly (31) is movably connected to the top of the housing (1), the driving assembly (31) is connected to the control valve assembly (33) via a plurality of the transmission assemblies (32), and the control valve assembly (33) slidably penetrates the housing (1) and the upper channel (131).

3. The inhalation anesthetic metering control device according to claim 2, characterized in that: The driving assembly (31) comprises a driving gear (311) and a gear plate (312) meshing with each other, the driving gear (311) and the gear plate (312) being rotatably connected to the housing (1), a gear ring (3121) being provided at the bottom of the gear plate (312), and the gear ring (3121) being connected to the transmission assembly (32).

4. The inhalation anesthetic metering control device according to claim 3, characterized in that: The transmission assembly (32) comprises a threaded transmission device (321) and a transmission rod (322), wherein the threaded transmission device (321) is rotationally connected to one end of the transmission rod (322), and the other end of the transmission rod (322) is rotationally connected to the control valve assembly (33); The threaded driver (321) is meshed with the gear ring (3121).

5. The inhalation anesthetic metering control device according to claim 4, characterized in that: The threaded transmission device (321) comprises a transmission gear (3211) meshing with the gear ring (3121); It also comprises a threaded rod (3212), one end of the threaded rod (3212) being connected to the transmission gear (3211), a threaded sleeve (3213) being provided on the threaded rod (3212), a limit bolt (3214) being provided at the other end of the threaded rod (3212), the threaded sleeve (3213) being connected to a connecting block (3216), the connecting block (3216) being slidably connected to the housing (1), and the connecting block (3216) being rotatably connected to the transmission rod (322).

6. The inhalation anesthetic metering control device according to claim 4, characterized in that: The control valve assembly (33) comprises an adjusting cylinder (331), the top of which is rotatably connected to the transmission rod (322); a sleeve (14) is provided through the housing (1), and the adjusting cylinder (331) is slidably arranged in the sleeve (14); an adjusting hole (3311) is provided through the side wall of the adjusting cylinder (331), and a filter hole (141) matching the adjusting hole (3311) is provided on the sleeve (14).

7. The inhalation anesthetic metering control device according to claim 1, characterized in that: A vaporizing rod (21) is provided at the bottom of the liquid medicine vaporizer (2), and the vaporizing rod (21) is connected to the liquid medicine tank (5) and is connected to the housing (1).

8. The inhalation anesthetic metering control device according to claim 7, characterized in that: The float ball metering mechanism (4) comprises a float ball (41) and a metering scale line (42); the float ball (41) is slidably sleeved on the vaporizing rod (21), and more than two float rods (43) are evenly rotatably connected to the float ball (41); The metering scale line (42) is arranged on the outer wall of the medicine liquid tank (5).

9. The method for using the inhalation anesthetic metering control device according to any one of claims 1 to 8, characterized in that: The steps include: S1: The air inlet (11) is connected to oxygen, the air outlet (12) is connected to the patient's respiratory tract, and oxygen is passed into the patient's respiratory system through the gas channel (13); S2: opening the liquid medicine vaporizer (2) to vaporize the anesthetic liquid in the liquid medicine tank (5); S3: Oxygen passes through the lower channel (132) and brings the vaporized anesthetic vapor into the patient's respiratory system to perform anesthesia; S4: Measuring the amount and speed of the liquid medicine in the liquid medicine tank (5) by means of a floating ball metering mechanism (4); S5: Open and adjust the concentration control mechanism (3), so that the external gas enters the upper channel (131) from the concentration control mechanism (3), and controllably dilutes the concentration of the anesthetic vapor reaching the gas outlet (12).

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