Anesthesia waste gas filtering device

Abstract

The present invention discloses an anesthesia waste gas filtering device, which relates to the technical field of preventing anesthetic gas from overflowing. The device comprises an inner oxygen hood, an outer oxygen hood is arranged outside the inner oxygen hood, a plurality of vents are provided on the side of the inner oxygen hood, a plurality of mounting grooves in contact with the vents are provided on the inner side of the outer oxygen hood, an anesthetic gas filter is installed in the mounting grooves, and a sealing member is installed in the outer oxygen hood. The present invention provides a plurality of mounting grooves in the outer oxygen hood and installs the anesthetic gas filter in the mounting grooves. When the outer oxygen hood is removed, a negative pressure is generated in the space formed by the sealing plate and the outer oxygen hood. The negative pressure draws the air containing anesthetic gas in the inner oxygen hood into the space formed by the sealing plate and the outer oxygen hood. The air needs to pass through the mounting grooves, so that the anesthetic in the gas is filtered by the anesthetic gas filter, thereby reducing the amount of anesthetic gas contained in the inner oxygen hood that is released to the outside after the inner oxygen hood is removed.

Description

Technical Field

[0001] The present invention relates to the technical field of preventing anesthetic gas from overflowing, and in particular to a waste gas filtering device for anesthesia. Background Art

[0002] With the increasing use of inhaled anesthetics in operating rooms, the anesthetic gas or steam diffused in the operating room during surgery will inevitably cause air pollution in the operating room environment. Long-term exposure to the polluted environment of this trace amount of anesthetic waste gas can have adverse effects on the physical and mental health of operating room staff, especially female staff who are pregnant or breastfeeding. There is a risk of spontaneous miscarriage, fetal malformation and reduced fertility. The pollution of anesthetic waste gas in the operating room and its hazards have received widespread attention. Reducing the pollution of anesthetic waste gas in the operating room and strengthening the health protection of staff have become important aspects of environmental protection in the operating room.

[0003] In the prior art, the patient needs to remove the oxygen mask after the operation. When some anesthetic gas remains in the oxygen mask, the remaining anesthetic gas will float into the air after the oxygen mask is removed, causing medical staff to inhale the anesthetic gas. Summary of the Invention

[0004] The object of the present invention is to provide an anesthesia waste gas filtering device to solve the problems raised in the above background technology.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] A waste gas filtering device for anesthesia includes an inner oxygen hood, an outer oxygen hood is arranged outside the inner oxygen hood, the outer oxygen hood is in contact with the inner oxygen hood, a plurality of vent holes are opened on the side of the inner oxygen hood, a first one-way valve is installed in the vent holes, a plurality of mounting grooves in contact with the vent holes are opened on the inner side of the outer oxygen hood, an anesthetic gas filter is installed in the mounting groove, a sealing member is installed in the outer oxygen hood, a fixing member is installed on the top of the inner oxygen hood, and the fixing member is connected to the sealing member.

[0007] Furthermore, the sealing member includes a sealing plate, which is slidably connected in the external oxygen mask and in sliding contact with the mounting groove. The fixing member is installed on the side of the sealing plate facing the internal oxygen mask. A connecting member is installed on the side of the sealing plate facing the external oxygen mask, and the end of the connecting member away from the sealing plate is connected to the external oxygen mask.

[0008] Furthermore, the connecting member includes a connecting rod, which is installed on the side of the sealing plate away from the internal oxygen mask. The end of the connecting rod away from the sealing plate is sleeved with a connecting tube, and the end of the connecting tube away from the connecting rod is installed in the external oxygen mask. A limiting block is installed at one end of the connecting rod in the connecting tube, and the limiting block is slidably connected in the storage tube.

[0009] Furthermore, the fixing part includes a round rod, which is installed on the side of the sealing plate facing the internal oxygen hood. A round hole is provided in the internal oxygen hood, and the round rod is inserted into the round hole. A limiting groove is provided at one end of the round rod in the internal oxygen hood. A rotation groove is provided in the internal oxygen hood, and an L-shaped rod is rotatably connected in the rotation groove, and the L-shaped rod is clamped in the limiting groove.

[0010] Furthermore, a sealing gasket is installed on the annular surface of the sealing plate, and a side of the sealing gasket away from the sealing plate is in contact with the internal oxygen mask.

[0011] Furthermore, an annular groove is provided at the inner edge of the external oxygen mask, a through hole communicating with the annular groove is provided on the outer side of the external oxygen mask, a storage cylinder is installed in the through hole, a second one-way valve is installed in the storage cylinder, and a negative pressure member is installed on the side of the storage cylinder away from the second one-way valve.

[0012] Furthermore, the negative pressure member includes a screw, a threaded hole is opened on the side of the storage cylinder away from the second one-way valve, a screw is threadedly connected in the threaded hole, a piston is installed at one end of the screw in the storage cylinder, and the piston is slidably connected in the storage cylinder.

[0013] Furthermore, a connecting pipe is provided on the outer surface of the external oxygen mask, a third one-way valve is installed in the connecting pipe, and a storage bottle is installed at one end of the connecting pipe away from the external oxygen mask.

[0014] Furthermore, protective pads are installed at the ends of the inner oxygen mask and the outer oxygen mask.

[0015] Furthermore, a vertical groove is provided on the side of the external oxygen mask, an air intake pipe extending into the internal oxygen mask is inserted into the vertical groove, and an exhaust pipe is provided in the air intake pipe.

[0016] The anesthesia waste gas filtering device provided by the present invention has the following beneficial effects:

[0017] 1. The present invention provides a plurality of mounting slots in the external oxygen hood and installs anesthetic gas filters in the mounting slots. When the external oxygen hood is removed, a negative pressure is generated in the space formed by the sealing plate and the external oxygen hood. The negative pressure draws the air containing anesthetic gas in the internal oxygen hood into the space formed by the sealing plate and the external oxygen hood. The air passes through the mounting slots, so that the anesthetic in the gas is filtered by the anesthetic gas filter, thereby reducing the amount of anesthetic gas contained in the internal oxygen hood that is released to the outside after the internal oxygen hood is removed.

[0018] 2. The present invention installs a sealing structure composed of a sealing plate, a connecting rod, a connecting tube and a limiting block in the external oxygen mask, and uses the sealing structure to seal the external oxygen mask, thereby preventing the gas entering the space formed by the sealing plate and the external oxygen mask from overflowing. Then, through the connecting pipe, the third one-way valve and the storage bottle installed on the outside, the gas containing anesthetic gas entering the space formed by the sealing plate and the external oxygen mask is stored in the storage bottle. Moreover, by moving the external oxygen mask back and forth multiple times, the size of the space formed by the sealing plate and the external oxygen mask can be changed, thereby increasing the amount of air entering the sealing plate and the external oxygen mask, thereby increasing the total amount of gas replaced in the internal oxygen mask, and reducing the residual anesthetic gas content in the internal oxygen mask.

[0019] 3. The present invention provides an annular groove at the inner edge of the external oxygen mask, connects the annular groove to the storage cylinder, and then installs a negative pressure structure composed of a screw and a piston in the storage cylinder. The negative pressure structure is used to absorb the air containing anesthetic gas that overflows from the internal oxygen mask, thereby reducing the probability of air containing anesthetic gas overflowing. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic structural diagram of an anesthesia waste gas filtering device according to the present invention;

[0021] Figure 2 This is a schematic diagram of the assembly of a connecting rod, a connecting cylinder, and a sealing plate of an anesthesia waste gas filtering device according to the present invention;

[0022] Figure 3 This is a schematic diagram of the assembly of a connecting rod, a limiting block, and a connecting cylinder of an anesthesia waste gas filtering device according to the present invention;

[0023] Figure 4 This is a schematic structural diagram of an internal oxygen mask of an anesthesia waste gas filtering device according to the present invention;

[0024] Figure 5 This is a schematic diagram of the assembly structure of a screw, a piston, and a storage cylinder of an anesthesia waste gas filtering device of the present invention;

[0025] Figure 6This is a schematic diagram of the assembly of a connecting pipe, a third one-way valve, and a storage bottle of an anesthesia waste gas filtering device according to the present invention;

[0026] Figure 7 The present invention is a schematic diagram of the assembly of an internal oxygen mask and an external oxygen mask of an anesthesia waste gas filtering device.

[0027] In the figure: 1. Internal oxygen mask; 2. Annular groove; 3. Exhaust pipe; 4. Inlet pipe; 5. First one-way valve; 6. Screw; 7. Storage cylinder; 8. Storage bottle; 9. Connecting pipe; 10. External oxygen mask; 11. Protective pad; 12. Round rod; 13. L-shaped rod; 14. Sealing plate; 15. Restriction groove; 16. Connecting rod; 17. Connecting cylinder; 18. Restriction block; 19. Sealing pad; 20. Vertical groove; 21. Anesthetic gas filter; 22. Mounting groove; 23. Piston; 24. Second one-way valve; 25. Third one-way valve. DETAILED DESCRIPTION

[0028] The following embodiments of the technical solution of the present application will be described in detail with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application and are therefore only examples and are not intended to limit the scope of protection of the present application.

[0029] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" and any variations thereof in the specification and claims of this application and the above-mentioned figure descriptions are intended to cover non-exclusive inclusions.

[0030] In the description of the embodiments of the present application, unless otherwise expressly specified or limited, technical terms such as "installed," "connected," "connected," and "fixed" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; internal connections between two components or interactions between two components. Those skilled in the art can understand the specific meanings of the above terms in the embodiments of the present application based on specific circumstances.

[0031] See also Figures 1 to 7The anesthesia waste gas filtering device provided by the present invention includes an inner oxygen mask 1, an outer oxygen mask 10 is provided outside the inner oxygen mask 1, the outer oxygen mask 10 is fitted with the inner oxygen mask 1, a plurality of vents are opened on the side of the inner oxygen mask 1, a first one-way valve 5 is installed in the vents, the first one-way valve 5 only allows the air in the inner oxygen mask 1 to enter the installation groove 22, a plurality of installation grooves 22 in contact with the vents are opened on the inner side of the outer oxygen mask 10, an anesthetic gas filter 21 is installed in the installation groove 22, and the anesthetic gas filter 21 is composed of a filter membrane and a columnar granular activated carbon adsorbent.

[0032] By opening a plurality of mounting slots 22 in the outer oxygen mask 10 and installing an anesthetic gas filter 21 in the mounting slots 22, when the outer oxygen mask 10 is removed, a negative pressure is generated in the space formed by the sealing plate 14 and the outer oxygen mask 10. The negative pressure draws the air containing the anesthetic gas in the inner oxygen mask 1 into the space formed by the sealing plate 14 and the outer oxygen mask 10. The air needs to pass through the mounting slots 22 so that the anesthetic in the gas is filtered by the anesthetic gas filter 21, thereby reducing the amount of anesthetic gas contained in the inner oxygen mask 1 that is released to the outside after the inner oxygen mask 1 is removed.

[0033] A connecting rod 16 is installed on the side of the sealing plate 14 facing the external oxygen mask 10. A connecting tube 17 is sleeved on the end of the connecting rod 16 away from the sealing plate 14. The end of the connecting tube 17 away from the connecting rod 16 is installed in the external oxygen mask 10. A limiting block 18 is installed on one end of the connecting rod 16 in the connecting tube 17. The limiting block 18 is slidably connected in the storage tube 7. The limiting block 18 is used to connect the connecting rod 16 and the connecting tube 17 to prevent the connecting rod 16 and the connecting tube 17 from separating, which will cause the sealing plate 14 to separate from the external oxygen mask 10.

[0034] A connecting pipe 9 is provided on the outer surface of the external oxygen mask 10 , and a third one-way valve 25 is installed in the connecting pipe 9 . A storage bottle 8 is installed at one end of the connecting pipe 9 away from the external oxygen mask 10 . The third one-way valve 25 only allows air in the external oxygen mask 10 to enter the storage bottle 8 .

[0035] A round rod 12 is installed on the side of the sealing plate 14 facing the inner oxygen mask 1. A round hole is provided in the inner oxygen mask 1, and the round rod 12 is inserted into the round hole. A limiting groove 15 is provided at one end of the round rod 12 in the inner oxygen mask 1. A rotation groove is provided in the inner oxygen mask 1, and an L-shaped rod 13 is rotatably connected in the rotation groove. The L-shaped rod 13 is clamped in the limiting groove 15. The position of the round rod 12 is limited by the L-shaped rod 13, so that the sealing plate 14 is connected to the inner oxygen mask 1. When the outer oxygen mask 10 moves, the sealing plate 14 will not move with the outer oxygen mask 10, thereby increasing the space formed by the sealing plate 14 and the outer oxygen mask 10, and at the same time absorbing the air containing anesthetic gas in the inner oxygen mask 1.

[0036] A sealing structure consisting of a sealing plate 14, a connecting rod 16, a connecting tube 17 and a limiting block 18 is installed in the external oxygen mask 10, and the sealing structure is used to seal the external oxygen mask 10, thereby preventing the gas entering the space formed by the sealing plate 14 and the external oxygen mask 10 from escaping. Then, the connecting pipe 9, the third one-way valve 25 and the storage bottle 8 are installed externally, and the gas containing anesthetic gas entering the space formed by the sealing plate 14 and the external oxygen mask 10 is stored by the storage bottle 8.

[0037] It should be noted that, in actual use, the outer oxygen mask 10 can be moved back and forth multiple times to change the contact area between the outer oxygen mask 10 and the inner oxygen mask 1, thereby changing the size of the space formed by the sealing plate 14 and the outer oxygen mask 10, so that more air can enter the sealing plate 14 and the outer oxygen mask 10, thereby increasing the total amount of gas replaced in the inner oxygen mask 1 and reducing the residual anesthetic gas content in the inner oxygen mask 1.

[0038] In some embodiments, a sealing gasket 19 is installed on the annular surface of the sealing plate 14. The side of the sealing gasket 19 away from the sealing plate 14 is in contact with the internal oxygen mask 1. The sealing gasket 19 is used to ensure that the sealing plate 14 is in contact with the internal oxygen mask 1, thereby preventing the air entering the internal oxygen mask 1 from overflowing from the edge of the sealing plate 14 and the internal oxygen mask 1.

[0039] An annular groove 2 is provided at the inner edge of the external oxygen mask 10, and a through hole communicating with the annular groove 2 is provided on the outside of the external oxygen mask 10. A storage cylinder 7 is installed in the through hole, and a second one-way valve 24 is installed in the storage cylinder 7. A threaded hole is provided on the side of the storage cylinder 7 away from the second one-way valve 24, and a screw 6 is threadedly connected to the threaded hole. A piston 23 is installed at one end of the screw 6 in the storage cylinder 7, and the piston 23 is slidably connected in the storage cylinder 7.

[0040] By opening an annular groove 2 at the inner edge of the outer oxygen mask 10, connecting the annular groove 2 with the storage cylinder 7, and then installing a negative pressure structure composed of a screw 6 and a piston 23 in the storage cylinder 7, the negative pressure structure is used to absorb the air containing anesthetic gas overflowing from the inner oxygen mask 1, thereby reducing the probability of air containing anesthetic gas overflowing.

[0041] Protective pads 11 are installed at the ends of the inner oxygen mask 1 and the outer oxygen mask 10 to protect the patient's face. At the same time, the protective pads 11 are used to seal the contact points between the inner oxygen mask 1 and the outer oxygen mask 10 and the human face, thereby reducing the probability of gas containing anesthetic gas in the inner oxygen mask 1 overflowing.

[0042] A vertical slot 20 is provided on the side of the external oxygen mask 10. An air inlet pipe 4 extending into the internal oxygen mask 1 is inserted into the vertical slot 20. An exhaust pipe 3 is provided in the air inlet pipe 4. By arranging the air inlet pipe 4 in the vertical slot 20, the external oxygen mask 10 is prevented from contacting the exhaust pipe 3 when moving, thereby preventing it from being unable to move.

[0043] When using the above-mentioned anesthesia waste gas filtering device, first close the pipeline for delivering anesthetic gas, then pull the strap on the inner oxygen mask 1 to prevent the inner oxygen mask 1 from separating from the patient's face, and then move the outer oxygen mask 10 to change the contact position of the outer oxygen mask 10 and the inner oxygen mask 1. At the beginning of the movement, the mounting groove 22 has not moved into the space formed by the sealing plate 14 and the outer oxygen mask 10. At this time, since no air enters the space formed by the sealing plate 14 and the outer oxygen mask 10 to generate negative pressure, as the outer oxygen mask 10 moves, the space formed by the sealing plate 14 and the outer oxygen mask 10 contacts the mounting groove 22. At this time, the space inside the inner oxygen mask 1 and the space formed by the sealing plate 14 and the outer oxygen mask 10 are connected. Then, the air containing anesthetic gas temporarily stored in the inner oxygen mask 1 passes through the mounting groove 22 and then enters the space formed by the sealing plate 14 and the outer oxygen mask 10, thereby reducing the content of anesthetic gas contained in the inner oxygen mask 1 that is released to the outside after the inner oxygen mask 1 is removed;

[0044] When the air containing anesthetic gas passes through the installation groove 22, it is filtered by the anesthetic gas filter 21 installed in the installation groove 22. As the external oxygen mask 10 moves, it continuously contacts different positions of the anesthetic gas filter 21, thereby ensuring the anesthetic gas filtering effect of the anesthetic gas filter 21. The filtered gas then enters the space formed by the sealing plate 14 and the external oxygen mask 10 for temporary storage.

[0045] Then, the connecting pipe 9, the third one-way valve 25 and the storage bottle 8 are installed on the outside. When the outer oxygen mask 10 is again attached to the inner oxygen mask 1, the gas in the space formed by the sealing plate 14 and the outer oxygen mask 10 is squeezed into the storage bottle 8. The storage bottle 8 stores the gas containing the anesthetic gas in the space formed by the sealing plate 14 and the outer oxygen mask 10.

[0046] When the outer oxygen mask 10 moves toward the inner oxygen mask 1 again, the outer oxygen mask 10 squeezes the inner space, so that the inner air is squeezed into the storage bottle 8 through the third one-way valve 25. Then the outer oxygen mask 10 is moved again, so that the outer oxygen mask 10 moves out of the inner oxygen mask 1. At this time, the anesthetic gas filter 21 filters the air containing anesthetic gas in the inner oxygen mask 1 again, and the air entering the inner oxygen mask 1 is stored again in the space on one side of the sealing plate facing the outer oxygen mask 10. In addition, the continuous air flow flushes the anesthetic remaining on the inner wall of the inner oxygen mask 1, further reducing the anesthetic gas content in the inner oxygen mask 1.

[0047] In addition, in order to ensure that the patient can inhale anesthetic gas, the air pressure of the internal oxygen mask 1 needs to be increased. During this process, the air containing anesthetic gas in the internal oxygen mask 1 will overflow from the contact point between the patient's skin and the internal oxygen mask 1. At this time, the overflowed gas will first enter the annular groove 2 opened at the inner edge of the external oxygen mask 10. Since a negative pressure structure composed of a screw 6 and a piston 23 is installed in the storage cylinder 7, the overflowed gas can enter the storage cylinder 7 through the through hole connected to the annular groove 2 and be temporarily stored in the storage cylinder 7, reducing the probability of overflow of air containing anesthetic gas.

[0048] The embodiments of the present invention are presented for purposes of illustration and description and are not intended to be exhaustive or to limit the invention to the disclosed forms. Many modifications and variations will be apparent to those skilled in the art. The embodiments are chosen and described in order to better illustrate the principles of the invention and its practical application and to enable those skilled in the art to understand the invention and design various embodiments with various modifications as suited for specific applications.

Claims

1. An exhaust gas filtering device for anesthesia, comprising an internal oxygen mask (1), characterized in that: An external oxygen hood (10) is provided outside the internal oxygen hood (1), the external oxygen hood (10) is fitted with the internal oxygen hood (1), a plurality of vents are provided on the side of the internal oxygen hood (1), a first one-way valve (5) is installed in the vents, a plurality of mounting grooves (22) in contact with the vents are provided on the inside of the external oxygen hood (10), an anesthetic gas filter (21) is installed in the mounting groove (22), a sealing member is installed in the external oxygen hood (10), a fixing member is installed on the top of the internal oxygen hood (1), and the fixing member is connected to the sealing member; The sealing member includes a sealing plate (14), the sealing plate (14) is slidably connected to the outer oxygen mask (10), and the sealing plate (14) is in sliding contact with the mounting groove (22), the fixing member is mounted on the side of the sealing plate (14) facing the inner oxygen mask (1), and a connecting member is mounted on the side of the sealing plate (14) facing the outer oxygen mask (10), and the end of the connecting member away from the sealing plate (14) is connected to the outer oxygen mask (10); The connecting member comprises a connecting rod (16), the connecting rod (16) being mounted on a side of the sealing plate (14) away from the internal oxygen mask (1), the end of the connecting rod (16) away from the sealing plate (14) being sleeved with a connecting tube (17), the end of the connecting tube (17) away from the connecting rod (16) being mounted in the external oxygen mask (10), the end of the connecting rod (16) in the connecting tube (17) being mounted with a limiting block (18), the limiting block (18) being slidably connected in the connecting tube (17); The fixing member comprises a round rod (12), the round rod (12) being mounted on a side of the sealing plate (14) facing the inner oxygen hood (1), a round hole being provided in the inner oxygen hood (1), the round rod (12) being inserted into the round hole, a limiting groove (15) being provided at one end of the inner oxygen hood (1), a rotation groove being provided in the inner oxygen hood (1), an L-shaped rod (13) being rotatably connected in the rotation groove, and the L-shaped rod (13) being clamped in the limiting groove (15); A sealing gasket (19) is installed on the annular surface of the sealing plate (14), and the side of the sealing gasket (19) away from the sealing plate (14) is in contact with the internal oxygen mask (1).

2. The anesthetic waste gas filtering device according to claim 1, characterized in that: An annular groove (2) is provided at the inner edge of the external oxygen mask (10), a through hole communicating with the annular groove (2) is provided on the outer side of the external oxygen mask (10), a storage cylinder (7) is installed in the through hole, a second one-way valve (24) is installed in the storage cylinder (7), and a negative pressure member is installed on a side of the storage cylinder (7) away from the second one-way valve (24).

3. The anesthetic waste gas filtering device according to claim 2, characterized in that: The negative pressure member comprises a screw (6), a threaded hole is provided on a side of the storage barrel (7) away from the second one-way valve (24), a screw (6) is threadedly connected in the threaded hole, a piston (23) is installed at one end of the screw (6) in the storage barrel (7), and the piston (23) is slidably connected in the storage barrel (7).

4. The anesthetic waste gas filtering device according to claim 1, characterized in that: A connecting pipe (9) is provided on the outer surface of the external oxygen mask (10), a third one-way valve (25) is installed in the connecting pipe (9), and a storage bottle (8) is installed at one end of the connecting pipe (9) away from the external oxygen mask (10).

5. The anesthetic waste gas filtering device according to claim 1, characterized in that: Protective pads (11) are installed at the ends of the inner oxygen mask (1) and the outer oxygen mask (10).

6. The anesthetic waste gas filtering device according to claim 1, characterized in that: A vertical slot (20) is provided on the side of the external oxygen mask (10), an air intake pipe (4) extending into the internal oxygen mask (1) is inserted into the vertical slot (20), and an exhaust pipe (3) is provided in the air intake pipe (4).

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