Anaesthetic mask

Abstract

The invention relates to the technical field of medical instruments, in particular to an anaesthetic mask which comprises a mask body, an air inlet is formed in the mask body and communicated with a cavity formed by the mask body, an external annular air bag is arranged on the periphery of an opening of the mask body, and a sealing ring piece is arranged on the outer edge of the air bag. The sealing ring piece is made of flexible materials, the thickness of the outer edge of the sealing ring piece is smaller than that of the inner edge of the sealing ring piece, and the sealing ring piece is tightly attached to the skin of a patient. By arranging the external annular air bag and the flexible sealing ring piece, the external annular air bag can be tightly attached to the facial contour of a patient after being inflated, and basic support is provided for sealing; the sealing ring piece is made of silica gel flexible materials, the thickness of the outer edge is smaller than that of the inner edge, a gradually-changed attaching structure is formed, the sealing ring piece can be tightly attached to the skin to reduce gaps, the sealing ring piece can adapt to face curves of different patients, anesthetic gas leakage is effectively avoided, and the health risk of medical staff is reduced.

Description

Anesthesia mask Technical Field

[0001] This invention relates to the field of medical device technology, specifically to an anesthesia mask. Background Technology

[0002] Anesthesia masks typically consist of a mask body, connector, and air bag (or sealing gasket). They cover the patient's mouth and nose and are used to connect to the breathing tubing to deliver anesthetic gas for the patient to inhale.

[0003] Anesthesia masks are crucial equipment used to deliver anesthetic gases into the patient's airway during anesthesia, and their performance directly affects the anesthetic effect and patient safety. Existing anesthesia masks have the following shortcomings: First, poor sealing; the mask does not fit tightly against the patient's face, easily leading to anesthetic gas leakage, which not only reduces anesthesia efficiency but may also pose health risks to medical staff. Second, inadequate fixation; the mask is prone to falling off when the patient is agitated, changes position, or during prolonged use, interrupting the anesthesia process, affecting the surgical progress, and increasing patient discomfort. Third, insufficient anti-fogging performance; the patient's exhaled air contains a large amount of water vapor, which easily condenses inside the mask upon cooling, forming water droplets or fog, obstructing medical staff's observation of the patient's face, and the falling water droplets may irritate the patient's respiratory tract, causing discomfort.

[0004] To address the aforementioned problems, this invention proposes an anesthesia mask that combines high sealing performance, anti-fall-off function, and anti-fogging and water-removing effect, thereby overcoming the shortcomings of existing technologies. Summary of the Invention

[0005] In view of this, the present invention provides an anesthesia mask that not only has high sealing performance, but also has anti-fall-off function and anti-fogging and water-removing effect.

[0006] To solve the above-mentioned technical problems, the present invention provides an anesthesia mask, including a mask body, an air inlet on the mask body, the air inlet communicating with the cavity formed by the mask body, an outer annular airbag around the opening of the mask body, a sealing ring at the outer edge of the airbag, the sealing ring being made of a flexible material and the outer edge thickness being less than the inner edge thickness, the sealing ring being in close contact with the patient's skin; the mask body also includes an exhalation assembly, the exhaust end of the exhalation assembly having a control valve and an exhaust port, the exhalation assembly being used to cover the patient's mouth, allowing the gas exhaled from the patient's mouth to be discharged from the exhaust port.

[0007] Furthermore, the exhalation assembly includes a housing, an internal annular airbag is provided around the opening of the housing, a second guide groove is provided at the bottom of the inner sidewall of the housing, and a drain port communicating with the second guide groove is provided on the outer wall of the housing.

[0008] Furthermore, the exhalation assembly includes a housing, an internal annular airbag is provided around the opening of the housing, a second guide groove is provided at the bottom of the inner sidewall of the housing, and a drain port communicating with the second guide groove is provided on the outer wall of the housing.

[0009] Furthermore, the flexible sealing sheet is also provided with a stop strip on the outside for limiting the flexible sealing sheet. The stop strip can prevent the flexible sealing sheet from being damaged or affecting the reset effect due to excessive deformation caused by excessive exhalation pressure.

[0010] Furthermore, the inner wall of the housing is provided with a limiting flange for limiting the position of the fixing plate.

[0011] Furthermore, the inner wall of the mask body is provided with a first guide channel. Both the first and second guide channels are V-shaped, and the opening angle of the V-shaped structure is 60-90°. This angle range can ensure the rapid flow of condensate while avoiding the guide channels occupying too much internal space of the mask.

[0012] Furthermore, the inner wall of the mask body is provided with a hydrophobic coating, which is made of polytetrafluoroethylene and has a thickness of 5-10 μm. This thickness range can ensure the hydrophobic effect while avoiding the coating being too thick and affecting the transparency of the mask.

[0013] Furthermore, the main body of the mask and the shell are integrally molded structures, using PC material for one-piece injection molding, which improves the overall structural stability and reduces the risk of leakage caused by assembly gaps.

[0014] Furthermore, the mask body opening is provided with multiple adjustment buckles around it, and the multiple adjustment buckles are connected by a fixing strap for fixing the mask body.

[0015] Furthermore, the sealing ring is made of silicone, with an outer edge thickness of 0.5-2mm and an inner edge thickness of 2-5mm. The gradient thickness design can adapt to the fitting needs of different facial contours.

[0016] The beneficial effects of the above-mentioned technical solution of the present invention are as follows: 1. The present invention sets an external annular airbag and a flexible sealing ring. After the external annular airbag is inflated, it can closely fit the contour of the patient's face, providing basic support for sealing. The sealing ring is made of flexible silicone material, and the thickness of the outer edge is less than that of the inner edge, forming a gradient fitting structure. It can not only closely fit the skin to reduce gaps, but also adapt to the facial curves of different patients, effectively avoid anesthetic gas leakage, reduce health risks to medical staff, and improve anesthesia efficiency.

[0017] 2. The polytetrafluoroethylene hydrophobic coating on the inner wall of the mask body of the present invention can significantly reduce water vapor adhesion and reduce fog and water droplet condensation; the V-shaped first and second guide channels can quickly guide the condensed liquid to the drain port to avoid water droplets falling on the patient's face; at the same time, the exhalation component separately covers the patient's mouth and exhausts through a dedicated exhaust port, reducing the diffusion of water vapor in the exhaled air within the mask body, further improving the anti-fogging effect and ensuring that medical staff can clearly observe the patient's facial condition.

[0018] 3. The mask body of this invention has multiple adjustable buckles around the opening, which, together with the fixing strap, can flexibly adjust the tightness according to the patient's head shape. The even distribution of multiple adjustable buckles can make the fixing force more balanced, avoiding excessive local pressure or loosening of the fixation. Even if the patient becomes agitated, changes position, or uses the mask for a long time, it can firmly fix the mask, prevent the anesthesia process from being interrupted, ensure the progress of the operation, and reduce the pain caused by the mask falling off. Attached Figure Description

[0019] Figure 1 is a schematic diagram of the structure from the front view of the present invention; Figure 2 is a schematic diagram of the structure from the side view of the present invention; Figure 3 is a schematic diagram of the partial structure from the front view of the present invention; Figure 4 is a schematic diagram of the partial structure from another front view of the present invention; Figure 5 is a schematic diagram of the structure of the exhalation component in the present invention; Figure 6 is an enlarged schematic diagram of the structure at point A in Figure 5; Figure 7 is a schematic diagram of the structure of another embodiment of the flexible sealing sheet in the present invention.

[0020] In the diagram: 1. Mask body; 2. External annular airbag; 3. Sealing ring; 4. Exhalation assembly; 401. Shell; 402. Internal annular airbag; 403. Second air guide groove; 5. Adjustment buckle; 6. Fixing strap; 7. Exhaust assembly; 701. Fixing plate; 702. Limiting flange; 703. Flexible sealing sheet; 704. Baffle strip; 8. Exhaust port; 9. Air inlet; 10. Drainage port; 11. First air guide groove. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to Figures 1-7. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the described embodiments of the present invention are within the scope of protection of the present invention.

[0022] As is known, the anesthesia mask is a key device used to deliver anesthetic gases into the patient's airway during anesthesia, and its performance directly affects the anesthetic effect and patient safety. Existing anesthesia masks have the following shortcomings in use: First, poor sealing; the mask does not fit tightly against the patient's face, easily leading to leakage of anesthetic gases, which not only reduces anesthesia efficiency but may also pose health risks to medical staff. Second, inadequate fixation; the mask is prone to falling off when the patient is agitated, changes position, or during prolonged use, interrupting the anesthesia process, affecting the progress of the surgery, and increasing patient discomfort. Third, insufficient anti-fogging performance; the patient's exhaled air contains a large amount of water vapor, which easily condenses inside the mask upon cooling, forming water droplets or fog, obstructing medical staff's observation of the patient's face, and the falling water droplets may irritate the patient's respiratory tract, causing discomfort.

[0023] As shown in Figures 1-7: An anesthesia mask includes a mask body 1, which is made of transparent PC material to facilitate medical staff to observe the patient's facial condition; an air inlet 9 is provided on the outside of the mask body 1, which is used to connect to an external anesthetic gas delivery pipeline, and the air inlet 9 is connected to the cavity formed inside the mask body 1 to achieve stable delivery of anesthetic gas.

[0024] Specifically, an anesthesia mask has an outer annular airbag 2 embedded around the opening of the mask body 1. The outer annular airbag 2 has a small inflation port, which can be inflated into the airbag to a suitable pressure through a syringe to adapt to the facial contours of different patients. A sealing ring 3 is bonded to the outer edge of the outer annular airbag 2. The sealing ring 3 is made of medical silicone material, with an outer edge thickness of 1 mm and an inner edge thickness of 3 mm, forming a gradient structure that is thinner on the outside and thicker on the inside. This structure can not only fit the patient's skin tightly, but also avoid the edge being too hard and compressing the skin.

[0025] According to an embodiment of the present invention, as shown in Figures 3-7, the mask body 1 is provided with an exhalation assembly 4 inside. The shell 401 of the exhalation assembly 4 and the mask body 1 adopt an injection molding integral structure to improve the overall structural stability and avoid air leakage at the connection. An internal annular airbag 402 is provided around the opening of the shell 401. After inflation, it can fit tightly against the skin around the patient's mouth to isolate the exhaled gas from the anesthetic gas in the mask body 1. A limiting protrusion 702 is integrally formed on the inner wall of the shell 401. The limiting protrusion 702 cooperates with the fixing plate 701 to clamp and fix the flexible sealing sheet 703. The outer edge of the fixing plate 701 is made of hard rubber so that it can fit tightly against the inner wall of the shell 401, further improving the sealing performance of the exhalation assembly 4. The flexible sealing sheet 703 is made of polycarbonate.

[0026] In this embodiment, when the patient exhales, the pressure of the exhaled gas pushes the two flexible sealing sheets 703 to open away from the fixed plate 701, with an opening gap of 2-3 mm. The gas flows through the gap to the exhaust port 8 and is discharged. When the patient stops exhaling or inhaling, the flexible sealing sheets 703 return to their original position under their own elasticity and fit tightly with the fixed plate 701 to form a seal, preventing the anesthetic gas from leaking from the exhalation assembly 4.

[0027] The inner wall of the housing 401 has a second guide groove 403 at the bottom, and the inner wall of the mask body 1 has a first guide groove 11. Both the first guide groove 11 and the second guide groove 403 are V-shaped, and the opening angle of the V-shaped structure is set to 75°. This angle can ensure the rapid flow of condensed liquid and avoid the guide groove being too deep and affecting the internal space of the mask. The bottom of the mask body 1 has a drain port 10, which is connected to both the first guide groove 11 and the second guide groove 403. The drain port 10 can be connected to a liquid storage bag or a conduit with a one-way valve to prevent liquid backflow. The inner wall of the mask body 1 is also coated with a polytetrafluoroethylene hydrophobic coating with a thickness of 8μm. This coating has excellent hydrophobic properties and can significantly reduce the condensation of water vapor on the inner wall of the mask, achieving efficient water removal in conjunction with the guide groove.

[0028] The main body of the mask 1 has four evenly spaced adjustment buckles 5 around the opening. The adjustment buckles 5 are made of plastic and can be rotated 360°. The four adjustment buckles 5 are connected by an elastic fixing strap 6. The fixing strap 6 is made of medical elastic webbing, which has good breathability and elasticity. When in use, the tightness of the fixing strap 6 can be adjusted by adjusting the adjustment buckles 5 to make the mask fit patients with different head shapes and ensure stable fixation.

[0029] According to another embodiment of the present invention, as shown in Figures 1 and 2, the outer edge thickness of the sealing ring 3 can be selected as 0.5mm, 1.2mm or 2mm according to actual needs, the thickness of the hydrophobic coating can be selected as 5μm, 7μm or 10μm, and the V-shaped opening angle of the first guide groove 11 and the second guide groove 403 can be selected as 60°, 80° or 90°, all of which can achieve good sealing, anti-fogging and water removal effects, and are suitable for different application scenarios.

[0030] In one embodiment of the present invention, as shown in FIG1, the exhaust port 8 can also be connected to an external exhalation recovery device to realize centralized processing of exhaled gas and further improve the environmental safety of the operating room.

[0031] Working principle: Before use, inflate the outer annular airbag 2 and the inner annular airbag 402 through the inflation port to expand the airbags to the appropriate size; cover the patient's mouth and nose with the mask body 1, ensuring that the sealing ring 3 fits against the patient's facial skin and the inner annular airbag 402 fits against the skin around the patient's mouth; adjust the tightness of the fixing strap 6 by adjusting the buckle 5 to securely fix the mask to the patient's head. Connect the air inlet 9 to the anesthetic gas delivery pipeline, and connect the exhaust port 8 to the external exhaust device or recovery device.

[0032] During anesthesia, anesthetic gas enters the cavity of the mask body 1 through the air inlet 9, and the patient inhales the anesthetic gas. The patient's exhaled gas enters the housing 401 of the exhalation assembly 4, and under the action of the control valve, it is discharged unidirectionally to the external device through the exhaust port 8. The water vapor in the patient's exhaled gas does not easily condense after contacting the hydrophobic coating on the inner wall of the mask body 1 and the inner wall of the housing 401. A small amount of condensed water droplets will flow along the first guide groove 11 and the second guide groove 403 of the V-shaped structure to the drain port 10, and finally be discharged outside the mask, avoiding the formation of fog and the falling of water droplets.

[0033] Throughout the entire process, the double sealing structure of the external annular airbag 2 and the sealing ring 3 effectively prevents the leakage of anesthetic gas. The cooperation between the fixing strap 6 and the adjusting buckle 5 ensures that the mask will not fall off. The cooperation between the hydrophobic coating and the guide groove achieves a good anti-fogging and water removal effect, ensuring the safety and stability of the anesthesia process.

[0034] In this invention, unless otherwise explicitly specified and limited, for example, it can be a fixed connection, a detachable connection, or an integral part; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two elements or an interaction between two elements. Unless otherwise explicitly limited, those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0035] The above description represents the preferred embodiments of the present invention. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. An anesthesia mask, characterized in that: The mask includes a main body with an air inlet that communicates with a cavity formed by the air inlet and the main body. An outer annular airbag is located around the opening of the main body, and a sealing ring is located at the outer edge of the airbag. The sealing ring is made of a flexible material, and the thickness of its outer edge is less than that of its inner edge, allowing it to fit snugly against the patient's skin. The mask also includes an exhalation assembly inside the main body. The exhalation assembly has a control valve and an exhaust port at its exhaust end. The exhalation assembly covers the patient's mouth, allowing exhaled air to be expelled through the exhaust port.

2. The anesthesia mask as described in claim 1, characterized in that: The exhalation assembly includes a housing, an internal annular airbag around the opening of the housing, a second flow channel at the bottom of the inner sidewall of the housing, and a drain port communicating with the second flow channel on the outer wall of the housing.

3. The anesthesia mask as described in claim 1, characterized in that: The control valve includes a fixed plate disposed on the inner wall of the housing. The fixed plate has a central opening structure, and two mutually cooperating flexible sealing plates are provided on the outer side of the fixed plate.

4. An anesthesia mask as described in claim 3, characterized in that: The flexible sealing sheet is also provided with a stop bar on its exterior for limiting the position of the flexible sealing sheet.

5. An anesthesia mask as described in claim 3, characterized in that: The inner wall of the housing is provided with a limiting flange for limiting the position of the fixing plate.

6. An anesthesia mask as described in claim 2, characterized in that: The inner wall of the mask body is provided with a first guide groove. Both the first guide groove and the second guide groove are V-shaped, and the opening angle of the V-shaped structure is 60-90°.

7. An anesthesia mask as described in claim 1, characterized in that: The inner wall of the mask body is provided with a hydrophobic coating, which is made of polytetrafluoroethylene and has a thickness of 5-10 μm.

8. An anesthesia mask as described in any one of claims 1-7, characterized in that: The main body of the mask and the shell are integrally formed.

9. An anesthesia mask as described in claim 1, characterized in that: The mask body has multiple adjustment buckles around the opening, and the adjustment buckles are connected by a fixing strap for securing the mask body.

10. An anesthesia mask as described in claim 1, characterized in that: The sealing ring is made of silicone, and the outer edge thickness of the sealing ring is 0.5-2mm.

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