Methoxyflurane inhalation administration device

Abstract

This invention provides a methoxyflurane inhalation and administration device, comprising a main body with a mouthpiece at one end and a drug inlet at the other end. The main body has a one-way drug inhalation channel leading from the drug inlet to the mouthpiece, and a drug inhalation core is placed in this channel. The main body has a dilution orifice, and a secondary tube is located above the dilution orifice. The secondary tube has an air inlet and an air outlet, and an air filter is located at the air outlet. The secondary tube also has a reversing valve with an inlet membrane and an outlet membrane that respectively cover the inlet and outlet, forming a one-way inlet dilution channel and a one-way exhalation filtration channel. In use, the air inlet of the secondary tube can be blocked with the hand to increase the methoxyflurane concentration, quickly achieving analgesia or anesthesia. This induces drowsiness; removing the hand from the inlet reduces the methoxyflurane concentration, preventing overdose. Furthermore, the exhaled air is filtered before being discharged from the device, avoiding environmental pollution from residual methoxyflurane.

Description

Technical Field

[0001] This utility model belongs to the field of medical device technology, specifically relating to a methoxyflurane inhalation drug delivery device. Background Technology

[0002] Methoxyflurane is a drug used for analgesia and anesthesia. It can be administered by evaporating the liquid and then inhaling it. However, methoxyflurane has significant side effects and should not be inhaled in large quantities. Therefore, a special inhalation device is required to prevent patients from inhaling too much unconsciously and to reduce adverse effects on them.

[0003] As disclosed in US Patent 3565071A, this self-regulating therapeutic device uses a tube with a suction nozzle and a core for adsorbing liquid methoxyflurane. After liquid methoxyflurane is added to the core, it evaporates and is inhaled by the patient for analgesia or anesthesia. The device has a dilution port. At the start of anesthesia, the patient, who requires a certain concentration for analgesia or anesthesia, is awake. The patient can cover the dilution port with their hand to increase the concentration of the evaporating drug, thus quickly achieving the desired analgesic or anesthetic effect. Once the patient is analgesic or anesthetized, they will become drowsy and automatically remove their hand from the dilution port to inhale fresh air, reducing the methoxyflurane concentration and preventing excessive inhalation and adverse reactions. This methoxyflurane inhalation device can automatically adjust the concentration of the inhaled drug as the anesthesia progresses, thereby minimizing the adverse effects of methoxyflurane on the patient.

[0004] However, the aforementioned self-regulating therapy device does not have a filter for exhaled air. When using the device, residual methoxyflurane exhaled by the patient is directly released into the surrounding air. Since methoxyflurane has adverse side effects and an unpleasant odor, this use will have a negative impact on the environment. Utility Model Content

[0005] This invention aims to solve the problems of the prior art by providing a methoxyflurane inhalation and delivery device. During use, the concentration of methoxyflurane can be adjusted automatically, and the methoxyflurane exhaled by the patient will be filtered and will not be directly released into the atmosphere, thus avoiding pollution of the surrounding environment.

[0006] This methoxyflurane inhalation and delivery device includes a main body with a mouthpiece at one end and a drug inlet at the other end. A one-way valve within the main body forms a one-way drug inhalation channel from the drug inlet to the mouthpiece. A suction core is placed in this channel, facing the drug inlet. A dilution orifice is located between the suction core and the mouthpiece on the main body. A secondary tube is located above the dilution orifice, containing an air inlet and an air outlet. An air filter is located at the air outlet. A reversing valve within the secondary tube has an inlet membrane and an outlet membrane that respectively cover the inlet and outlet, forming a one-way inlet dilution channel from the inlet to the mouthpiece and a one-way exhalation filtration channel from the mouthpiece to the outlet. The one-way valve of this invention allows air to enter the main body but not exit. The reversing valve simultaneously ensures that the inlet of the secondary tube allows air to enter but not exit, and the outlet of the secondary tube allows air to exit but not enter. This structure perfectly adapts to the application scenarios of methoxyflurane and provides excellent performance. When the patient inhales, the gas formed by the volatilization of methoxyflurane stored in the suction core is inhaled, thus providing analgesia or anesthesia. Simultaneously, fresh air can be drawn in through the air inlet of the secondary tube to regulate the concentration of inhaled methoxyflurane. When the patient exhales, the gas can only be exhaled through the exhaust port of the secondary tube, filtered before being discharged outside the device, ensuring that all exhaled methoxyflurane is filtered. When the patient is awake, the air inlet of the secondary tube can be blocked with the hand to increase the concentration of methoxyflurane, quickly achieving analgesia or anesthesia. Once the effect is achieved, the patient will become drowsy, and the hand will automatically be removed from the air inlet, thereby reducing the concentration of methoxyflurane and preventing the inhalation of excessive amounts. Furthermore, during the above process, the exhaled gas is filtered before being discharged outside the device, avoiding environmental pollution caused by residual methoxyflurane.

[0007] Preferably, the inlet film and the exhaust film are connected together by a slender, bent fixing part; the inlet film can deflect inwards while its outer side is held in place by the inner wall of the inlet, and the exhaust film can deflect outwards while its inner side is held in place by the outer wall of the exhaust port. Thus, using a single reversing valve structure, it can simultaneously satisfy the following requirements: the inlet can only allow air to enter but not exit, and the exhaust port can only allow air to exit but not enter. The structure is simple and reasonable, easy to process and assemble, low in cost, and provides good performance.

[0008] Preferably, the air filtration device includes an exhaust pipe with its inner end inserted into the exhaust port, and an exhaust port at the outer end of the exhaust pipe, with activated carbon placed between the exhaust port and the exhaust port. This structure effectively filters out residual methoxyfluorocarbons in exhaled air, preventing pollution of the surrounding environment.

[0009] Preferably, the air inlet is provided with a slot for engaging the upper end of the bending and fixing part; the lower end of the bending and fixing part is pressed and fixed to the outside of the exhaust port by the inner end of the exhaust pipe, and the exhaust film is vertically set and covers the exhaust port. In this way, while assembling the exhaust pipe into the secondary pipe body, the exhaust film of the reversing valve can be fixed in a suitable position, which is simple to assemble and conducive to promotion.

[0010] Preferably, the reversing valve has a sleeve hole, and the secondary pipe body has a protrusion at the exhaust port that mates with the sleeve hole. This effectively secures the reversing valve, preventing damage even after prolonged use and extending the lifespan of the device.

[0011] Preferably, the activated carbon is provided with mesh on both sides, and a breathable membrane is provided on the inner side of the mesh. In this way, the activated carbon can be effectively confined in the exhaust pipe without affecting its use.

[0012] Preferably, a tail plug is provided at the dosing port, and a connecting shaft supports the tail plug and the liquid suction core. The one-way valve is a diaphragm fitted onto the connecting shaft. The diaphragm can deflect inward, and its outer side is held in place by the inner wall of the tail plug. In this way, the one-way valve can ensure that air can only enter and not exit at the dosing port, which is simple in structure and has good performance.

[0013] Preferably, the inner end of the connecting shaft is provided with a stop bar that abuts against the liquid suction core. The stop bar can effectively fix the liquid suction core, thereby leaving space for the one-way valve to deflect inward, ensuring the effectiveness of use.

[0014] Preferably, the tail plug protrudes outward from the middle, forming an insertion interface facing the connecting shaft, into which the outer end of the connecting shaft is inserted; the recess of the tail plug has an opening directly opposite the suction core. This facilitates the assembly of the connecting shaft and the tail plug; at the same time, since the opening is located in the recess, it is easier to add medicine, improving the dosing efficiency.

[0015] Preferably, there are multiple openings, each separated by reinforcing braces. This further improves the efficiency of drug dosing while ensuring sufficient strength of the tail plug.

[0016] The methoxyflurane inhalation delivery device provided by this utility model has at least the following advantages:

[0017] 1. This invention perfectly adapts to the inhalation administration of methoxyflurane. When the patient is awake, they can block the air inlet of the secondary tube with their hand to increase the concentration of methoxyflurane, quickly achieving analgesia or anesthesia. Once the effect is achieved, drowsiness will occur, and the hand will automatically be removed from the air inlet, thereby reducing the concentration of methoxyflurane and preventing the inhalation of excessive amounts. Furthermore, during the above process, the exhaled gas is filtered before being discharged from the device, avoiding environmental pollution caused by residual methoxyflurane.

[0018] 2. This utility model employs a single reversing valve structure, which simultaneously satisfies the following requirements: the air inlet can only allow air to enter but not exit, and the exhaust port can only allow air to exit but not enter. The structure is simple and reasonable, easy to process and assemble, low in cost, and provides good performance.

[0019] 3. The combination structure of the connecting shaft, one-way valve and tail plug of this utility model meets the requirement that air can only enter and not exit at the dosing port, while allowing for rapid dosing and good performance. Attached Figure Description

[0020] Figure 1 This is a three-dimensional structural diagram of Embodiment 1 of the present utility model;

[0021] Figure 2 This is a cross-sectional view of Embodiment 1 of the present invention;

[0022] Figure 3 This is a cross-sectional view of the secondary tube body in Embodiment 1 of this utility model;

[0023] Figure 4 This is a schematic diagram of the reversing valve of this utility model installed at the air inlet;

[0024] Figure 5 This is a schematic diagram of the connection structure between the connecting shaft and the tail plug of this utility model;

[0025] Figure 6 This is a schematic diagram of the tail plug connected to the main body of this utility model;

[0026] Figure 7 This is a three-dimensional structural diagram of Embodiment 2 of the present invention;

[0027] Figure 8 This is a cross-sectional view of Embodiment 2 of the present invention;

[0028] Figure 9 This is a schematic diagram of the exploded decomposition structure of Embodiment 2 of this utility model;

[0029] Figure 10 This is a schematic diagram of the exhaust pipe structure in Embodiment 2 of this utility model;

[0030] Explanation of reference numerals in the attached figures:

[0031] Main tube 1, nozzle 11, drug filling port 12, tail plug 13, tail plug inner wall 131, insertion interface 132, opening 133, reinforcing bar 134, connecting shaft 14, stop bar 141, secondary tube 2, air inlet 21, exhaust port 22, air inlet inner wall 23, exhaust port outer wall 24, slot 25, protrusion 26, top cover 27, one-way valve 3, drug inhalation channel 4, liquid suction core 5, dilution hole 6, air filter device 7, exhaust pipe 71, exhaust outlet 72, activated carbon 73, mesh 74, diaphragm 75, thinning hole 76, inclined surface 77, reversing valve 8, air inlet membrane 81, bending and fixing part 82, exhaust membrane 83, air inlet dilution channel 9, exhalation filter channel 10. Detailed Implementation

[0032] The following specific embodiments illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification.

[0033] It should be understood that the structures, proportions, sizes, etc., illustrated in the accompanying drawings of this specification are only for illustrative purposes to aid those skilled in the art and are not intended to limit the implementation of this utility model. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to size, without affecting the effects and objectives of this utility model, should still fall within the scope of the technical content disclosed in this utility model. Furthermore, the terms such as "upper," "lower," "left," "right," "middle," and "one" used in this specification are merely for clarity of description and are not intended to limit the scope of implementation of this utility model. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of implementation of this utility model.

[0034] Example 1: As Figure 1 As shown, the methoxyflurane inhalation delivery device provided by this utility model comprises a long, cylindrical main body 1, one end of which is provided with a nozzle 11. The nozzle 11 is flat and suitable for the patient to hold in their mouth. The other end is provided with a drug delivery port 12, which is formed by an opening at the end of the main body 1. The main body 1 has a dilution hole 6 near the nozzle 11. A secondary tube 2 with an air inlet 21 and an exhaust port 22 is provided on the dilution hole 6. The air inlet 21 and the exhaust port 22 are respectively located at the top and side of the secondary tube 2. The bottom end of the secondary tube 2 is inserted into the dilution hole 6 and is fixed by an inverted buckle at the bottom end.

[0035] like Figure 2 As shown, the main body 1 is equipped with a one-way valve 3 to form a one-way drug inhalation channel 4 from the drug inlet 12 to the suction nozzle 11. A tail plug 13 is provided at the drug inlet 12. The one-way valve 3 is an airtight diaphragm that can deflect inwards, with its outer side held in place by the inner wall 131 of the tail plug. When medication is administered or the patient inhales, the diaphragm is forced to deflect inwards, opening to allow medication or air from outside the device to enter. When the patient exhales, the diaphragm cannot deflect outwards due to the inner wall 131 of the tail plug, thus sealing the area and preventing gas from escaping. Therefore, the drug inlet 12 can only allow air to enter but not exit, forming a one-way drug inhalation channel 4 within the main body 1.

[0036] like Figure 2As shown, the drug suction channel 4 is equipped with a suction core 5 facing the drug inlet 12. The suction core 5 is a Swiss roll-shaped absorbent cotton felt, with its outer end facing the drug inlet 12 to facilitate the absorption of liquid methoxyfluoroethane poured in from the drug inlet 12. A connecting shaft 14 supports the tail plug 13 and the suction core 5, and a one-way valve 3 is sleeved on the connecting shaft 14. The inner end of the connecting shaft 14 is provided with a stop bar 141 that abuts against the suction core 5, thereby providing sufficient space for the one-way valve 3 to deflect inward. The dilution hole 6 is located between the suction core 5 and the nozzle 11, ensuring that the fresh air flowing in from the dilution hole 6 is mixed with the volatilized gaseous methoxyfluoroethane (rather than the unvolatilized liquid methoxyfluoroethane), thus achieving a dilution effect.

[0037] like Figure 2 , Figure 3 As shown, the sub-tube body 2 has an air inlet 21 at the top and an exhaust outlet 22 on the side, with an air filter 7 located outside the exhaust outlet 22. The air filter 7 can be made of an adsorbent material, such as microporous activated carbon. The sub-tube body 2 contains a reversing valve 8, which is an integral structure. Its upper end has an airtight inlet membrane 81 that covers the air inlet 21. The inlet membrane 81 can deflect inwards, while its outer side is blocked by the inner wall 23 of the inlet, allowing air to enter but not exit through the inlet 21, thus forming a one-way air intake dilution channel 9 from the inlet 21 to the nozzle 11. The lower end of the reversing valve 8 has an airtight exhaust membrane 83 that covers the exhaust outlet 22. The exhaust membrane 83 can deflect outwards, while its inner side is blocked by the outer wall 24 of the exhaust outlet, allowing air to exit but not enter through the exhaust outlet 22, thus forming a one-way exhalation filtration channel 10 from the nozzle 11 through the exhaust outlet 22 to the outside of the device. The intake membrane 81 and the exhaust membrane 83 are connected together by a slender, bent fixing part 82. The lower end of the bent fixing part 82 is pressed and fixed to the outside of the exhaust port 22 by the inner end of the air filter device 7, so that the exhaust membrane 83 is vertically set and covers the exhaust port 22. The bent fixing part 82 is fixed in place, and the material of the reversing valve 8 has a certain degree of elasticity, providing the intake membrane 81 and the exhaust membrane 83 with the ability to return to their original position after deflection.

[0038] like Figure 4 As shown (the bending and fixing part 82 in this figure has not yet been bent and installed), the air inlet 21 is provided with a slot 25 for engaging the upper end of the bending and fixing part 82. The reversing valve 8 is provided with a sleeve hole 84, and the secondary pipe body 2 is provided with a protrusion 26 at the exhaust port 22 that mates with the sleeve hole 84. The reversing valve 8 is sleeved on the protrusion 26 through the sleeve hole 84.

[0039] like Figure 2 , Figure 5 , Figure 6As shown, the tail plug 13 is cylindrical with an open outer end and a hemispherical protrusion at the middle of its inner end, forming an insertion interface 132 facing the connecting shaft 14. The outer end of the connecting shaft 14 is inserted into this insertion interface 132. A concave portion is formed at the inner end of the tail plug 13 relative to the protrusion, and this concave portion has four openings 133 facing the suction core 5. Each opening 133 is separated by reinforcing braces 134. When the medicine is poured into the tail plug 13, it flows along the protrusion to the concave portion, and then through the openings 133 to the suction core 5, improving the efficiency of medicine dispensing.

[0040] Example 2: As Figure 7 , Figure 8 , Figure 9 , Figure 10 As shown, the difference from Embodiment 1 is that the air filtration device 7 includes an exhaust pipe 71 with its inner end inserted into the exhaust port 22. The exhaust pipe 71 has an exhaust outlet 72 at its outer end, and activated carbon 73 is disposed between the exhaust outlet 72 and the exhaust port 22. A mesh 74 is provided on both sides of the activated carbon 73, and a diaphragm 75 is provided inside the mesh 74. In this way, the internal structure of the exhaust pipe 71 can hold more activated carbon 73, which can increase the filtration time and space of the activated carbon 73, allowing exhaled residual methoxyfluorocarbons to be fully filtered, preventing pollution of the surrounding environment.

[0041] like Figure 9 As shown, the upper end of the secondary tube 2 is provided with a cover 27 for easy assembly.

[0042] like Figure 10 As shown, the inner end of the exhaust pipe 71 is provided with a thinning hole 76 to reduce the impact of inconsistent wall thickness caused by thermal expansion and contraction during plastic molding. The inner end of the exhaust pipe 71 is provided with a bevel 77 to provide sufficient space for the exhaust film 83 to deflect outward.

[0043] Taking Example 2 as an example, the usage process of this utility model is as follows:

[0044] First, a certain amount of liquid methoxyflurane is poured into the tail plug 13, allowing it to flow through the opening 133 and forcing the one-way valve 3 to deflect inward. This allows the liquid methoxyflurane to flow to the suction core 5 and be absorbed and stored by it. During use, the patient inhales by holding the mouthpiece 11 in their mouth and then blocks the air inlet 21 with their hand, allowing them to inhale a sufficient concentration of volatile gaseous methoxyflurane for rapid analgesia or anesthesia. During this process, due to the action of the one-way valve 3 and the reversing valve 8, the patient's exhaled air can only be discharged outside the device through the exhaust port 22 and the exhaust pipe 71. The activated carbon 73 inside the exhaust pipe 71 absorbs any residual methoxyflurane, preventing environmental pollution. Once the patient achieves analgesia or anesthesia, they will become drowsy. At this time, their hand will unconsciously leave the air inlet 21, allowing them to inhale fresh air to dilute the methoxyflurane and prevent the inhalation of excessive amounts.

[0045] This invention has a simple and reasonable structure, is easy to process and assemble, and has low cost. It can be perfectly adapted to the methoxyflurane inhalation administration scenario and is conducive to its promotion.

[0046] Of course, the device can obviously also be adapted to similar volatile inhalation drug delivery, such as the delivery of other halogenated volatile liquids.

Claims

1. A methoxyflurane inhalation drug delivery device, comprising a main body (1) with a mouthpiece (11) at one end and a drug inlet (12) at the other end, wherein a one-way valve (3) is provided inside the main body (1) to form a one-way drug inhalation channel (4) from the drug inlet (12) to the mouthpiece (11), wherein a suction core (5) is placed in the drug inhalation channel (4) facing the drug inlet (12), and a dilution hole (6) is provided between the suction core (5) and the mouthpiece (11) in the main body (1), characterized in that, The dilution hole (6) is provided with a secondary tube (2), which has an air inlet (21) and an exhaust port (22) and an air filter (7) at the exhaust port (22); the secondary tube (2) is provided with a reversing valve (8), which has an air inlet membrane (81) and an exhaust membrane (83) that can cover the air inlet (21) and the exhaust port (22) respectively, so as to form a one-way air intake dilution channel (9) from the air inlet (21) to the mouthpiece (11) and a one-way exhalation filter channel (10) from the mouthpiece (11) to the outside of the device through the exhaust port (22).

2. The methoxyflurane inhalation drug delivery device according to claim 1, characterized in that, The intake membrane (81) and the exhaust membrane (83) are connected together by a slender bending fixing part (82); the intake membrane (81) can be deflected inward and its outer side is held against the inner wall (23) of the intake port, and the exhaust membrane (83) can be deflected outward and its inner side is held against the outer wall (24) of the exhaust port.

3. The methoxyflurane inhalation drug delivery device according to claim 2, characterized in that, The air filtration device (7) includes an exhaust pipe (71) with its inner end inserted into the exhaust port (22), and an exhaust port (72) at the outer end of the exhaust pipe (71). Activated carbon (73) is provided between the exhaust port (72) and the exhaust port (22).

4. The methoxyflurane inhalation drug delivery device according to claim 3, characterized in that, The air inlet (21) is provided with a slot (25) for engaging the upper end of the bending fixing part (82); the lower end of the bending fixing part (82) is pressed and fixed to the outside of the exhaust port (22) by the inner end of the exhaust pipe (71), and the exhaust film (83) is vertically set and covers the exhaust port (22).

5. The methoxyflurane inhalation drug delivery device according to claim 4, characterized in that, The reversing valve (8) is provided with a sleeve hole (84), so the secondary pipe body (2) is provided with a protrusion (26) at the exhaust port (22) that matches the sleeve hole (84).

6. The methoxyflurane inhalation drug delivery device according to claim 3, characterized in that, The activated carbon (73) has a mesh (74) on both sides, and a breathable membrane (75) is provided on the inner side of the mesh (74).

7. The methoxyflurane inhalation and delivery device according to claim 1, characterized in that, The dosing port (12) is provided with a tail plug (13), and a connecting shaft (14) is supported between the tail plug (13) and the liquid suction core (5). The one-way valve (3) is a diaphragm fitted on the connecting shaft (14). The diaphragm can be deflected inward and its outer side is held in place by the inner wall (131) of the tail plug.

8. The methoxyflurane inhalation drug delivery device according to claim 7, characterized in that, The inner end of the connecting shaft (14) is provided with a stop bar (141) that abuts against the liquid suction core (5).

9. The methoxyflurane inhalation delivery device according to claim 7, characterized in that, The tail plug (13) protrudes outward from the middle and forms an insertion interface (132) facing the connecting shaft (14), and the outer end of the connecting shaft (14) is inserted into the insertion interface (132); the recess of the tail plug (13) is provided with an opening (133) facing the liquid suction core (5).

10. The methoxyflurane inhalation delivery device according to claim 9, characterized in that, There are multiple openings (133), and each opening (133) is separated by reinforcing bars (134).

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