Closed Anesthesia Nasal Mask

Abstract

The present invention relates to the technical field of medical devices, and particularly to a closed anesthesia nasal mask. The technical implementation scheme of the present invention is as follows: It includes an anesthesia nasal mask, and also includes a fitting unit. The fitting unit includes a flexible sealing pad. The flexible sealing pads are symmetrically and slidably connected to the anesthesia nasal mask. A drug control unit is arranged above the anesthesia nasal mask. The drug control unit includes a drug control tube. The drug control tube is communicated with the anesthesia nasal mask. One side of the drug control tube is connected with a mounting ring, and a rotating frame is rotatably connected in the mounting ring. Through the design of the flexible sealing pad, the present invention can achieve the sealing between the anesthesia nasal mask and the skin around the patient's nose, thereby effectively preventing external air from entering the anesthesia nasal mask when the patient inhales, resulting in a reduction in the efficiency of the patient's absorption of anesthetic drugs. Through the design of the flow control plate, the present invention can accurately adjust the passing amount of anesthetic drugs according to the patient's breathing speed, thereby assisting the patient to quickly and steadily calm down.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and particularly to a closed anesthesia nasal mask. Background Art

[0002] An anesthesia nasal mask is an essential medical device for general anesthesia. The anesthesia nasal mask is connected to an anesthesia machine to provide an effective non-invasive breathing circuit for a patient. When it is necessary to perform inhalation anesthesia on the patient, the anesthesia nasal mask needs to cover the patient's nose, and high-concentration oxygen and anesthetic drugs are inhaled into the body through the patient's breathing.

[0003] When the existing anesthesia nasal mask is in use, it cannot completely fit the skin around the patient's nose. External air will enter the anesthesia nasal mask when the patient inhales, resulting in the patient being unable to efficiently absorb anesthetic drugs. After the patient wears the anesthesia nasal mask for a long time, indentations will appear on the skin around the patient's nose. Before the patient undergoes surgery, the patient's mood is rather nervous, and the patient's breathing rate is relatively rapid. Medical staff usually comfort the patient, but some patients cannot calm down quickly only through the comfort of medical staff, resulting in the surgery being unable to be carried out quickly and efficiently. Summary of the Invention

[0004] In order to overcome the shortcomings in the prior art, the present invention provides a closed anesthesia nasal mask.

[0005] The technical implementation solution of the present invention is: a closed anesthesia nasal mask, including the anesthesia nasal mask, further including a fitting unit. The fitting unit includes a flexible sealing pad. The flexible sealing pads are symmetrically and slidably connected to the anesthesia nasal mask. A drug control unit is arranged above the anesthesia nasal mask. The drug control unit includes a drug control tube. The drug control tube is communicated with the anesthesia nasal mask. One side of the drug control tube is connected with an installation ring. A rotating frame is rotatably connected in the installation ring. A plurality of uniformly distributed flow control plates are slidably connected in the rotating frame. A first elastic member is arranged between each of the plurality of flow control plates and the rotating frame.

[0006] Furthermore, the fitting unit further includes a pneumatic telescopic rod. The pneumatic telescopic rods are symmetrically and slidably connected to the anesthesia nasal mask. The telescopic ends of the pneumatic telescopic rods are fixedly connected to the top surfaces of the flexible sealing pads.

[0007] Furthermore, the drug control unit further includes a first valve plate. The first valve plate is hinged to the bottom of the drug control tube.

[0008] Furthermore, the drug control unit further includes a fan blade. The fan blade is fixedly connected in the rotating frame.

[0009] Furthermore, the drug control unit further includes a limiting block. A plurality of uniformly distributed limiting blocks are hinged to the rotating frame. The plurality of limiting blocks are used in cooperation with the plurality of flow control plates.

[0010] Further, it further includes a U-shaped block. Guide grooves are symmetrically formed on one side of the medicine control tube, and the U-shaped block is fixedly connected inside the guide grooves. Clamping blocks are symmetrically installed on one side of the mounting ring, and the clamping blocks are respectively used in cooperation with the guide grooves and the U-shaped block.

[0011] Further, it further includes a wiping strip. The wiping strip is slidably connected to the inner wall of the anesthesia nasal mask. A second elastic member is arranged between the wiping strip and the inner wall of the anesthesia nasal mask. The first valve plate is connected to the wiping strip through a pull rope.

[0012] Further, it further includes an exhaust pipe. The exhaust pipe is symmetrically communicated with one side of the anesthesia nasal mask, and a second valve plate is hinged inside the exhaust pipe.

[0013] Further, it further includes an elastic telescopic rod. The elastic telescopic rod is symmetrically installed on the anesthesia nasal mask. The exhaust pipe is communicated with the elastic telescopic rod through a hose, and the telescopic end of the elastic telescopic rod is fixedly connected to the outer wall of the pneumatic telescopic rod.

[0014] Further, exhaust holes are formed on the outer wall of the elastic telescopic rod.

[0015] Further, both the flow control plate and the fan blades are made of medical-grade silica gel material.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0017] 1. Through the design of the flexible sealing gasket, the present invention can achieve the seal between the anesthesia nasal mask and the skin around the patient's nose, thereby effectively preventing external air from entering the anesthesia nasal mask when the patient inhales, which may lead to a decrease in the efficiency of the patient absorbing the anesthetic drug. Through the design of the flow control plate, the passing amount of the anesthetic drug can be accurately adjusted according to the patient's breathing speed, thereby assisting the patient to quickly calm down.

[0018] 2. Through the cooperation of the first valve plate and the second valve plate, the present invention can effectively prevent the patient from inhaling external gas when inhaling, and prevent the gas from entering the medicine control tube when the patient exhales, resulting in a decrease in the anesthetic effect. Through the design of the elastic telescopic rod, the flexible sealing gasket can float up and down with the patient's breathing, thereby reducing the pressure feeling of the flexible sealing gasket on the patient's skin and preventing the flexible sealing gasket from squeezing the skin around the patient's nose for a long time, resulting in indentations on the skin around the patient's nose. The comfort of the patient wearing the anesthesia nasal mask is effectively improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic structural diagram of the whole of the present invention;

[0020] Figure 2Schematic diagram of the mechanism of the bonding unit of the present invention;

[0021] Figure 3 Schematic diagram of the installation at the medicine control tube of the present invention;

[0022] Figure 4 Schematic diagram of the installation at the rotating frame of the present invention;

[0023] Figure 5 Schematic diagram of the installation at the clamping block of the present invention;

[0024] Figure 6 Schematic diagram of the installation at the wiping strip of the present invention;

[0025] Figure 7 Schematic diagram of the installation at the elastic telescopic rod of the present invention;

[0026] Figure 8 Schematic diagram of the installation at the second valve plate of the present invention;

[0027] Figure 9 Schematic diagram of the installation at the pneumatic telescopic rod of the present invention.

[0028] Meanings of the reference numerals in the figure: 1: Anesthetic nasal mask, 2: Flexible sealing pad, 3: Mounting ring, 4: Flow control plate, 5: Pneumatic telescopic rod, 6: Medicine control tube, 7: First valve plate, 8: Rotating frame, 9: Fan blade, 10: Limit block, 11: U-shaped block, 12: Clamping block, 13: Wiping strip, 14: Exhaust pipe, 15: Second valve plate, 16: Elastic telescopic rod. Detailed implementation manners

[0029] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0030] Closed anesthetic nasal mask, as Figures 1-3 shown, includes an anesthetic nasal mask 1, and further includes a bonding unit. The bonding unit includes a flexible sealing pad 2. The flexible sealing pad 2 is symmetrically and slidably connected to the anesthetic nasal mask 1. A medicine control unit is provided above the anesthetic nasal mask 1. The medicine control unit includes a medicine control tube 6. The medicine control tube 6 is communicated with the anesthetic nasal mask 1. One side of the medicine control tube 6 is connected to a mounting ring 3. A rotating frame 8 is rotatably connected in the mounting ring 3. Three uniformly distributed flow control plates 4 are slidably connected in the rotating frame 8. The three flow control plates 4 can limit the air flow speed of the anesthetic drug. A first elastic member is provided between each of the three flow control plates 4 and the rotating frame 8. The first elastic member is a tension spring.

[0031] AsFigure 2 As shown, the fitting unit further includes a pneumatic telescopic rod 5. The pneumatic telescopic rod 5 is symmetrically and slidably connected to the anesthesia nasal mask 1. The telescopic end of the pneumatic telescopic rod 5 is fixedly connected to the top surface of the flexible gasket 2. The top end of the outer wall of the pneumatic telescopic rod 5 is communicated with an air inlet nozzle. The extension of the telescopic end of the pneumatic telescopic rod 5 can drive the flexible gasket 2 to fit with the skin around the patient's nose.

[0032] As Figure 3 shown, the medicine control unit further includes a first valve plate 7. The bottom of the medicine control tube 6 is hinged with a first valve plate 7. The first valve plate 7 is used to isolate the anesthesia nasal mask 1 from the medicine control tube 6 to prevent gas from entering the medicine control tube 6 when the patient exhales.

[0033] As Figures 3-4 shown, the medicine control unit further includes a fan blade 9. The fan blade 9 is fixedly connected inside the rotating frame 8. The fan blade 9 can rotate when the patient inhales.

[0034] As Figure 4 shown, the medicine control unit further includes a limiting block 10. Three evenly distributed limiting blocks 10 are hinged on the rotating frame 8. The three limiting blocks 10 are arranged in one-to-one correspondence with the three flow control plates 4. The three limiting blocks 10 and the three flow control plates 4 are used in cooperation. The limiting block 10 is used to prevent the flow control plate 4 from quickly resetting.

[0035] As Figure 5 shown, it further includes a U-shaped block 11. Guide grooves are symmetrically opened on one side of the medicine control tube 6. The U-shaped block 11 is fixedly connected inside the guide grooves. Clamping blocks 12 are symmetrically installed on one side of the mounting ring 3. The clamping blocks 12 are respectively used in cooperation with the guide grooves and the U-shaped block 11. Through the cooperation of the clamping blocks 12 and the U-shaped block 11, the mounting ring 3 can be easily disassembled.

[0036] As Figure 6 shown, it further includes a wiping strip 13. The wiping strip 13 is slidably connected to the inner wall of the anesthesia nasal mask 1. The top surface of the wiping strip 13 is a medical sponge. A second elastic member is arranged between the wiping strip 13 and the inner wall of the anesthesia nasal mask 1. The second elastic member is a tension spring. The first valve plate 7 is connected to the wiping strip 13 through a pull rope. When the first valve plate 7 rotates, it can drive the wiping strip 13 to move through the pull rope.

[0037] As Figures 6-8 shown, it further includes an exhaust pipe 14. The exhaust pipe 14 is symmetrically communicated with one side of the anesthesia nasal mask 1. A second valve plate 15 is hinged inside the exhaust pipe 14. The second valve plate 15 is used to isolate the anesthesia nasal mask 1 from the exhaust pipe 14 to prevent external gas from entering the anesthesia nasal mask 1 through the exhaust pipe 14 when the patient inhales.

[0038] As Figures 7-8As shown, it further includes an elastic telescopic rod 16. Elastic telescopic rods 16 are symmetrically installed on the anesthesia nasal mask 1. The exhaust pipe 14 and the elastic telescopic rod 16 are connected through a hose. The telescopic end of the elastic telescopic rod 16 is fixedly connected to the outer wall of the pneumatic telescopic rod 5. When the telescopic end of the elastic telescopic rod 16 extends, it can move the flexible gasket 2.

[0039] Figure 9 As shown, exhaust holes are provided on the outer wall of the elastic telescopic rod 16. Both the flow control plate 4 and the fan blade 9 are made of medical-grade silicone.

[0040] First, adjust the total amount of anesthetic drugs according to the patient's condition. Then, put the anesthesia nasal mask 1 on the patient's head through an elastic band and fit the anesthesia nasal mask 1 to the skin around the patient's nose. Since everyone's facial contour is different, the anesthesia nasal mask 1 cannot fit perfectly with the skin around each patient's nose. At this time, the position of the flexible gasket 2 needs to be adjusted. Initially, the telescopic end of the pneumatic telescopic rod 5 is in a contracted state, and the bottom surface of the flexible gasket 2 is on the same horizontal plane as the bottom surface of the anesthesia nasal mask 1. First, connect the balloon to the air inlet nozzle of the pneumatic telescopic rod 5 (the balloon is a prior art, commonly seen in mercury sphygmomanometers and will not be elaborated here), and squeeze the balloon to send the gas into the pneumatic telescopic rod 5. The telescopic end of the pneumatic telescopic rod 5 drives the flexible gasket 2 to descend obliquely downward. After the flexible gasket 2 descends, it fits with the skin around the patient's nose. The flexible gasket 2 undergoes elastic deformation and fills the gap between the anesthesia nasal mask 1 and the skin around the nose. The squeezing force of the flexible gasket 2 on the skin around the patient's nose will not cause discomfort to the patient. Through the cooperation of the flexible gasket 2 and the anesthesia nasal mask 1, a sealed state can be formed between the skin around the patient's nose and the anesthesia nasal mask 1, effectively preventing external air from entering the anesthesia nasal mask 1 when the patient inhales, which may lead to a decrease in the efficiency of the patient's absorption of anesthetic drugs. Then, insert the delivery tube of the anesthesia machine into the mounting ring 3 to complete the wearing of the anesthesia nasal mask 1.

[0041] After wearing the anesthesia nasal mask 1, preoperative preparations are started. Since the patient is quite nervous before the operation and the patient's breathing rate is relatively rapid, medical staff usually comfort the patient at this time. However, some patients still cannot calm down quickly. At this time, it is necessary to increase the amount of anesthetic drug inhaled by the patient each time to help the patient calm down as soon as possible. It should be noted that the increase in the amount of anesthetic drug inhaled each time is controlled within the range that the human body can bear. When the increased amount of anesthetic drug is inhaled by the patient, it will not affect the patient's body, and the amount of anesthetic drug inhaled by the patient will not exceed the total amount of anesthetic drug adjusted at the beginning. When the patient inhales, the internal air pressure of the anesthesia nasal mask 1 decreases, and the first valve plate 7 rotates downward with the connection point of the drug control tube 6 as the center under the influence of air pressure. The first valve plate 7 drives the wiping strip 13 to slide horizontally through the pull rope, and the second elastic member is stretched by force. At this time, the inner cavity of the drug control tube 6 is connected to the anesthesia nasal mask 1, and the patient absorbs the anesthetic drug in the drug control tube 6. At this time, the air flow in the drug control tube 6 and the rotating frame 8 flows rapidly. The air flow in the rotating frame 8 impacts the fan blade 9, and the fan blade 9 drives the three flow control plates 4 to rotate rapidly through the rotating frame 8. The three flow control plates 4 move away from each other and slide under the influence of centrifugal force, and the first elastic member is stretched by force. During this process, the three limit blocks 10 respectively rub against the surfaces of the three flow control plates 4 and are driven by the flow control plates 4 to rotate with the connection point of the rotating frame 8 as the center. After the three flow control plates 4 slide, the disturbance of the air flow in the rotating frame 8 is reduced, so that the air flow velocity in the rotating frame 8 increases, thereby increasing the passing amount of the anesthetic drug. Subsequently, the patient exhales. At this time, the internal air pressure of the anesthesia nasal mask 1 increases, and the first valve plate 7 can move without being affected by air pressure. The second elastic member contracts and drives the wiping strip 13 to slide back to its original position. The wiping strip 13 drives the first valve plate 7 to rotate back to its original position through the pull rope, so that the inner cavity of the drug control tube 6 is no longer connected to the anesthesia nasal mask 1, and the gas exhaled by the patient will not enter the drug control tube 6, thereby preventing the gas exhaled by the patient from mixing with the anesthetic drug and causing the concentration of the anesthetic drug to decrease and affecting the drug effect. Since the gas exhaled by the patient will cause water vapor to form on the inner wall of the anesthesia nasal mask 1, and water droplets will be formed after long-term accumulation. During the sliding process of the wiping strip 13, the wiping strip 13 can wipe the inner wall of the anesthesia nasal mask 1, thereby realizing the cleaning of the water vapor.

[0042] After the internal air pressure of the anesthesia nasal mask 1 increases, the second valve plate 15 rotates into the exhaust pipe 14 with the connection point of the exhaust pipe 14 as the center of rotation, connecting the exhaust pipe 14 with the anesthesia nasal mask 1. The gas exhaled by the patient is discharged through the exhaust pipe 14. During this process, part of the gas enters the inner cavity of the elastic telescopic rod 16 through the hose, and part of the gas in the inner cavity of the elastic telescopic rod 16 is discharged through the exhaust holes on it. It should be noted that the speed of the gas entering the inner cavity of the elastic telescopic rod 16 is greater than the speed of the gas discharged through the exhaust holes, so that the telescopic end of the elastic telescopic rod 16 can extend. The telescopic movement of the elastic telescopic rod 16 drives the corresponding pneumatic telescopic rod 5 to slide obliquely upward. The telescopic end of the pneumatic telescopic rod 5 drives the flexible sealing pad 2 to slide, so that the flexible sealing pad 2 slides away from the skin around the patient's nose, thereby reducing the pressure of the flexible sealing pad 2 on the patient's skin and preventing the flexible sealing pad 2 from squeezing the skin around the patient's nose for a long time, resulting in indentations on the skin around the patient's nose. This effectively improves the comfort of the patient wearing the anesthesia nasal mask 1. At this time, no air flow is generated inside the rotating frame 8, and the fan blade 9 is no longer impacted by the air flow, so that the rotating frame 8 no longer drives the three flow control plates 4 to rotate. The first elastic member contracts to drive the corresponding flow control plate 4 to slide back to its original position. During this process, the three limit blocks 10 respectively rub against the surfaces of the three flow control plates 4 and are driven to rotate back to their original positions by the frictional force. When the limit block 10 rotates to the state shown in Figure 4 , after the state shown, the limit block 10 continues to rub against the surface of the flow control plate 4, and the sliding speed of the flow control plate 4 slows down due to the frictional force. Since the patient's breathing is relatively rapid at this time, when the patient inhales again, the three flow control plates 4 are not fully reset, and the three flow control plates 4 will not block the air flow in the rotating frame 8 too much, thus enabling the patient's breathing to remain smooth when the patient's breathing is relatively rapid.

[0043] Subsequently, the patient inhales, reducing the internal air pressure of the anesthesia nasal mask 1. The second valve plate 15 rotates back to its original position under the influence of the air pressure, disconnecting the exhaust pipe 14 from the anesthesia nasal mask 1, thereby preventing the patient from inhaling external air through the exhaust pipe 14 and reducing the anesthetic effect. At this time, no gas enters the inner cavity of the elastic telescopic rod 16 through the hose, and the remaining gas in the inner cavity of the elastic telescopic rod 16 is discharged through the exhaust holes on it. The telescopic end of the elastic telescopic rod 16 contracts, causing the flexible sealing pad 2 to descend, thus realizing the up and down floating of the flexible sealing pad 2 with the patient's breathing. Then, the above steps are repeated to enable the patient to inhale the anesthetic drug efficiently.

[0044] As the patient continuously inhales the anesthetic drug, the patient gradually calms down and the breathing frequency gradually stabilizes. During this process, the rotation speed of the fan blade 9 changes with the inhalation speed and frequency of the patient. When the inhalation speed and frequency of the patient gradually decrease, the rotation speed of the fan blade 9 gradually decreases, and the rotation speed of the rotating frame 8 driven by the fan blade 9 gradually decreases. As a result, the centrifugal force received by the three flow control plates 4 gradually decreases, and the blocking area of the three flow control plates 4 for the air flow in the medicine control tube 6 increases, reducing the air flow speed through the medicine control tube 6, and further reducing the passing amount of the anesthetic drug. When the breathing frequency of the patient is completely stable, the rotation speed of the rotating frame 8 driven by the fan blade 9 drops to the lowest. The centrifugal force received by the three flow control plates 4 is less than the elastic force of the first elastic member, and the three flow control plates 4 no longer slide. At this time, the passing amount of the anesthetic drug drops to the lowest, and the passing amount of the anesthetic drug is sufficient for the patient to maintain the anesthetic state.

[0045] Through the above steps, the comfort of the patient wearing the anesthetic nasal mask 1 can be effectively improved, and the passing amount of the anesthetic drug can be accurately adjusted according to the breathing speed and frequency of the patient, so as to assist the patient to quickly and smoothly calm down.

[0046] After the operation is completed, the anesthetic nasal mask 1 is removed. At this time, the anesthetic nasal mask 1 needs to be disinfected for the next use. First, the installation ring 3 is rotated clockwise manually. The installation ring 3 drives the two clamping blocks 12 to rotate. After the two clamping blocks 12 rotate, they no longer contact the corresponding U-shaped blocks 11. Then the installation ring 3 is moved away from the medicine control tube 6, so that the two clamping blocks 12 are disengaged from the guide grooves of the medicine control tube 6, thereby completing the separation of the installation ring 3 from the medicine control tube 6. Through the above steps, the installation ring 3 can be separated from the anesthetic nasal mask 1, making it more convenient for disinfection. When using it next time, the two clamping blocks 12 are inserted into the guide grooves of the medicine control tube 6, and the installation ring 3 is rotated counterclockwise so that the two clamping blocks 12 are clamped with the corresponding U-shaped blocks 11 to complete the installation.

[0047] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit the protection scope of the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the essence and scope of the technical solutions of the present invention.

Claims

1. A closed anesthesia nasal mask, comprising an anesthesia nasal mask (1), characterized in that: It also includes a fitting unit, the fitting unit including a flexible sealing pad (2), the flexible sealing pad (2) being symmetrically slidably connected to the anesthesia nasal mask (1), a drug control unit being arranged above the anesthesia nasal mask (1), the drug control unit including a drug control tube (6), the anesthesia nasal mask (1) being connected to the drug control tube (6), one side of the drug control tube (6) being connected to a mounting ring (3), a rotating frame (8) being rotatably connected inside the mounting ring (3), a plurality of uniformly distributed flow control plates (4) being slidably connected inside the rotating frame (8), and a first elastic member being arranged between the plurality of flow control plates (4) and the rotating frame (8); The fitting unit further comprises a pneumatic telescopic rod (5), the pneumatic telescopic rod (5) being symmetrically slidably connected to the anesthesia nasal mask (1), and the telescopic end of the pneumatic telescopic rod (5) being fixedly connected to the top surface of the flexible sealing pad (2); It also includes an exhaust pipe (14), one side of the anesthesia nasal mask (1) is symmetrically connected to the exhaust pipe (14), and a second valve plate (15) is hinged inside the exhaust pipe (14); It also includes an elastic telescopic rod (16), which is symmetrically mounted on the anesthesia nasal mask (1), the exhaust pipe (14) and the elastic telescopic rod (16) are connected via a hose, and the telescopic end of the elastic telescopic rod (16) is fixedly connected to the outer wall of the pneumatic telescopic rod (5).

2. The closed anesthesia nasal mask according to claim 1, characterized in that: The drug control unit also includes a first valve plate (7), and the bottom of the drug control tube (6) is hingedly connected to the first valve plate (7).

3. The closed anesthesia nasal mask according to claim 1, characterized in that: The drug control unit also includes a fan blade (9), and the fan blade (9) is fixedly connected inside the rotating frame (8).

4. The closed anesthesia nasal mask according to claim 3, characterized in that: The drug control unit also includes a limit block (10), and a plurality of evenly distributed limit blocks (10) are hingedly connected to the rotating frame (8), and the plurality of limit blocks (10) are used in conjunction with a plurality of flow control plates (4).

5. The closed anesthesia nasal mask according to claim 2, characterized in that: It also comprises a U-shaped block (11), a guide groove is symmetrically provided on one side of the drug control tube (6), the U-shaped block (11) is fixedly connected in the guide groove, and a clamping block (12) is symmetrically installed on one side of the mounting ring (3), the clamping block (12) is used in conjunction with the guide groove and the U-shaped block (11) respectively.

6. The closed anesthesia nasal mask according to claim 2, characterized in that: It also includes a wiping strip (13), the inner wall of the anesthesia nasal mask (1) is slidably connected to the wiping strip (13), a second elastic member is provided between the wiping strip (13) and the inner wall of the anesthesia nasal mask (1), and the first valve plate (7) is connected to the wiping strip (13) via a drawstring.

7. The closed anesthesia nasal mask according to claim 1, characterized in that: An exhaust hole is provided on the outer wall of the elastic telescopic rod (16).

8. The closed anesthesia nasal mask according to claim 3, characterized in that: The flow control plate (4) and the fan blades (9) are both made of medical-grade silicone.

Images