Laryngeal mask

Abstract

The utility model discloses a laryngeal mask which comprises a mask bag, an air guide pipe and an inflation pipe, and the mask bag can be fixed in a throat pipe in an expanding mode. One end of the gas-guide tube is connected with the mask bag, the gas-guide tube is sequentially provided with a hose section and a reinforcing section in the axial direction away from the mask bag, the working positions of the hose section are located at the throat and inside the oral cavity, the hose section can be bent and deformed, the working positions of the reinforcing section are located at the teeth and outside the oral cavity, and steel wire reinforcing ribs are arranged in the tube wall of the reinforcing section; one end of the inflation tube is communicated with an inner cavity of the mask bag, and the other end is connected with the one-way valve. The possibility that the air guide tube is deformed and blocked due to tooth occlusion can be reduced, so that the use safety of the laryngeal mask is improved.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, and in particular to a laryngeal mask. Background Technology

[0002] During general anesthesia, a laryngeal mask airway is used to maintain airway patency. The laryngeal mask airway mainly consists of an inflation tube, an air delivery tube, and a cuff. The cuff is connected to one end of the air delivery tube. After the cuff is inserted into the larynx, it is inflated through the inflation tube and fixed inside the larynx. The air delivery tube extends from outside the mouth into the pharynx and connects with the larynx, allowing air to be delivered into the larynx to maintain the patient's ventilation and oxygenation. Because the air delivery tube is usually made of soft, elastic material, and the patient's teeth will naturally clench during general anesthesia, this clenching can cause the air delivery tube, which is located near the teeth, to deform. This can cause the inner wall of the air delivery tube to adhere to the airway and block the airway, easily leading to respiratory obstruction or even threatening the patient's life, resulting in low safety. Utility Model Content

[0003] This invention aims to at least partially solve one of the technical problems in related technologies. To this end, this invention provides a laryngeal mask airway that reduces the possibility of airway deformation and blockage caused by teeth biting, thereby improving the safety of laryngeal mask airway use.

[0004] According to an embodiment of this utility model, a laryngeal mask airway is provided, comprising a mask bag, an air delivery tube, and an inflation tube. The mask bag is inflatable and fixed inside the larynx. One end of the air delivery tube is connected to the mask bag. The air delivery tube is axially arranged in a direction away from the mask bag, consisting of a flexible section and a reinforcing section. The flexible section is positioned at the pharynx and inside the oral cavity and is flexible and deformable. The reinforcing section is positioned at the teeth and outside the oral cavity, and its wall is reinforced with steel wire ribs. One end of the inflation tube is connected to the inner cavity of the mask bag, and the other end is connected to a one-way valve.

[0005] A laryngeal mask according to an embodiment of this utility model has at least the following beneficial effects: In use, the mask is inserted into the working position within the larynx, allowing the flexible section of the air delivery tube to extend into the oral cavity to the pharynx and connect to the larynx. Simultaneously, the reinforcing section is positioned at the teeth. Because the reinforcing section has steel wire reinforcing ribs within its tube wall, the structural strength of the reinforcing section is enhanced, improving its resistance to deformation and reducing the possibility of blockage of the air delivery tube due to tooth occlusion, thereby improving safety. Furthermore, air is inflated into the inner cavity of the mask through the inflation tube, causing the mask to expand and be fixed within the larynx. Since one end of the inflation tube is connected to a one-way valve, the one-way valve prevents backflow or leakage of gas entering the mask, improving inflation stability and air pressure stability within the mask, thus enhancing safety.

[0006] According to some embodiments of the present invention, the steel wire reinforcing ribs are spirally arranged inside the pipe wall of the reinforcing section and extend along the axial direction of the reinforcing section.

[0007] According to some embodiments of the present invention, the steel wire reinforcing ribs are arranged in a mesh pattern inside the pipe wall of the reinforcing section.

[0008] According to some embodiments of the present invention, a pressure gauge is connected to the end of the inflation tube away from the bladder, and the pressure gauge is used to detect the air pressure of the bladder.

[0009] According to some embodiments of this utility model, the end of the inflation tube away from the bladder is connected to a three-way connector, and the other two ports of the three-way connector are respectively connected to the one-way valve and the pressure gauge.

[0010] According to some embodiments of the present invention, a carbon dioxide detector is connected to the end of the air tube away from the mask, and the carbon dioxide detector is used to detect the carbon dioxide concentration at the end of expiration.

[0011] According to some embodiments of the present invention, the outer wall of the air guide tube is provided with scale lines along the axial direction.

[0012] According to some embodiments of the present invention, the outer wall of the reinforcing section is provided with a locking block, the locking block has a locking slot, and the inflation tube can be locked into the locking slot.

[0013] According to some embodiments of this utility model, the air guide tube, the inflation tube, and the bladder are all made of silicone.

[0014] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0015] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0016] Figure 1 This is a schematic diagram of the laryngeal mask according to an embodiment of the present invention;

[0017] Figure 2 This is another structural schematic diagram of the laryngeal mask according to an embodiment of the present utility model;

[0018] Figure 3 This is a partial cross-sectional view of the airway of the laryngeal mask according to an embodiment of the present invention;

[0019] Figure 4 This is another partial cross-sectional view of the airway of the laryngeal mask according to an embodiment of the present invention;

[0020] Figure 5 This is a schematic diagram of the locking block of the laryngeal mask according to an embodiment of the present invention.

[0021] Explanation of reference numerals in the attached figures:

[0022] 100, air duct 200, hose section M, reinforcing section L, steel wire reinforcing rib 210, scale line 220, locking block 230, locking slot 231, inflation tube 300, tee connector 310, one-way valve 400, pressure gauge 500, carbon dioxide detector 600, connector 700. Detailed Implementation

[0023] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0024] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0025] In the description of this utility model, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. If "first" or "second" is used in the description, it is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0026] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0027] Understandably, referring to Figures 1 to 5The present invention provides a laryngeal mask airway, comprising a mask 100, an air duct 200, and an inflation tube 300. The mask 100 is inflatable and fixed inside the larynx. One end of the air duct 200 is connected to the mask 100. The air duct 200 is configured with a flexible tube segment M and a reinforcing segment L in sequence along the axial direction away from the mask 100. The flexible tube segment M is positioned at the pharynx and inside the oral cavity and is flexible and deformable. The reinforcing segment L is positioned at the teeth and outside the oral cavity, and the wall of the reinforcing segment L is provided with steel wire reinforcing ribs 210. One end of the inflation tube 300 is connected to the inner cavity of the mask 100, and the other end of the inflation tube 300 is connected to a one-way valve 400.

[0028] In use, the bladder 100 is inserted into the working position inside the larynx, and the flexible section M of the air delivery tube 200 is inserted into the oral cavity to the pharynx and connected to the larynx. At the same time, the reinforcing section L is positioned at the teeth. Because the wall of the reinforcing section L is equipped with steel wire reinforcing ribs 210, the structural strength of the reinforcing section L is enhanced by the steel wire reinforcing ribs 210, thereby improving the deformation resistance of the reinforcing section L and reducing the possibility of blockage of the air delivery tube 200 due to tooth occlusion, thus improving the safety of use. In addition, air is inflated into the cavity of the bladder 100 through the inflation tube 300, causing the bladder 100 to expand and be fixed inside the larynx. Since one end of the inflation tube 300 is connected to a one-way valve 400, the one-way valve 400 prevents the backflow or leakage of gas into the bladder 100, thereby improving the stability of inflation and the stability of air pressure inside the bladder 100, thus improving the safety of use.

[0029] Because the flexible tube segment M can bend and deform, when the flexible tube segment M is inserted into the oral cavity and pharynx, the bending and deformation of the flexible tube segment M makes the flexible tube segment M more conform to the physiological curvature of the human oral cavity and pharynx, thereby improving the ease of insertion of the airway 200 and reducing damage to the oral cavity and pharyngeal mucosa, thus reducing patient discomfort.

[0030] It should be noted that by utilizing the toughness of the steel wire reinforcing rib 210, the air tube 200 can be bent and adjusted while reducing the degree of deformation of the air tube 200 under stress, thereby reducing the possibility of blockage of the air tube 200 due to tooth occlusion, and improving the safety of use.

[0031] The end of the airway 200 away from the mask 100 is connected to a connector 700. The connector 700 facilitates the connection of the airway 200 to the breathing device, which controls the input of oxygen and the output of carbon dioxide gas to enable the patient to breathe.

[0032] Understandably, referring to Figure 1 and Figure 3The steel wire reinforcing ribs 210 are spirally arranged inside the wall of the reinforcing section L and extend along the axial direction of the reinforcing section L. By spirally arranging the steel wire reinforcing ribs 210 inside the wall of the reinforcing section L and extending along the axial direction of the reinforcing section L, the deformation resistance of the circumferential wall of the reinforcing section L can be improved, reducing the possibility of the inner wall of the reinforcing section L sticking together and blocking the air guide tube 200, thereby improving safety in use. In addition, it ensures the axial bending flexibility of the reinforcing section L, thus facilitating the adjustment of the bending angle of the reinforcing section L.

[0033] Understandably, referring to Figure 1 and Figure 4 The steel wire reinforcing ribs 210 are arranged in a mesh pattern inside the pipe wall of the reinforced section L. Because the steel wire reinforcing ribs 210 are arranged in a mesh pattern inside the pipe wall of the reinforced section L, the deformation resistance of the reinforced section L can be improved, thereby reducing the possibility of blockage of the air duct 200 due to tooth occlusion, thus improving the safety of use.

[0034] Because the cuff 100, after being inflated, achieves a seal by fitting against the wall of the larynx, it prevents gas from leaking out of the gap between the cuff 100 and the wall of the larynx during breathing. If the cuff 100 leaks air, the volume of the cuff 100 decreases, and the air pressure in the cuff 100 decreases, causing the cuff 100 to detach from the wall of the larynx. In this case, it cannot achieve a seal and therefore cannot safely supply air to the patient.

[0035] Understandably, referring to Figure 1 and Figure 2 The end of the inflation tube 300 furthest from the cuff 100 is connected to a pressure gauge 500, which is used to detect the air pressure in the cuff 100. Detecting the air pressure in the cuff 100 via the pressure gauge 500 allows for real-time monitoring, reducing the risk of leaks and improving safety. Furthermore, when inflating the cuff 100, the pressure gauge 500 provides a real-time and intuitive assessment of the air pressure, improving inflation accuracy and reducing the risk of overinflation and laryngeal tissue damage.

[0036] Specifically, refer to Figure 1 and Figure 2 The end of the inflation tube 300 furthest from the bladder 100 is connected to a three-way connector 310. The other two ports of the three-way connector 310 are connected to a one-way valve 400 and a pressure gauge 500, respectively. Connecting the inflation tube 300, one-way valve 400, and pressure gauge 500 through the three-way connector 310 allows for easy disassembly and replacement of the pressure gauge 500 and one-way valve 400.

[0037] It should be noted that the pressure gauge 500 is threadedly connected to the three-way connector 310, and the check valve 400 is also threadedly connected to the three-way connector 310. The pressure gauge 500 and the check valve 400 can be disassembled and replaced by turning them.

[0038] Understandably, referring to Figure 1 and Figure 2 The end of the airway 200 furthest from the mask 100 is connected to a carbon dioxide detector 600, which is used to detect the carbon dioxide concentration at the end of expiration. By detecting the carbon dioxide concentration at the end of expiration using the carbon dioxide detector 600, the carbon dioxide status at the end of expiration can be monitored in real time and accurately, so as to detect the patient's lung ventilation and pulmonary blood flow status in a timely manner, thereby improving the safety of use.

[0039] Understandably, referring to Figure 2 The outer wall of the airway 200 is provided with graduation lines 220 along the axial direction. The graduation lines 220 on the outer wall of the airway 200 along the axial direction can be used to easily determine the insertion depth of the laryngeal mask, thereby improving the accuracy of the laryngeal mask insertion position and reducing complications caused by the laryngeal mask being inserted too deeply or too shallowly.

[0040] Understandably, referring to Figures 1 to 5 The outer wall of the reinforcing section L has a protruding locking block 230 with a locking slot 231, into which the inflation tube 300 can be inserted. By inserting the inflation tube 300 into the locking slot 231, the position of the inflation tube 300 is fixed, which reduces the possibility of the bladder 100 shaking due to the shaking of the inflation tube 300, thereby reducing the wear of the bladder 100 on the inner wall of the throat tube and improving the safety of use.

[0041] It should be noted that, since the inflation tube 300 is an elastic component, it can undergo elastic deformation. The opening diameter of the bayonet 231 is smaller than the outer diameter of the inflation tube 300. When the inflation tube 300 passes through the opening of the bayonet 231, it first undergoes elastic contraction to reduce the outer diameter. After being inserted into the bayonet 231, the elasticity is restored, and the outer diameter of the inflation tube 300 increases, which can prevent the inflation tube 300 from passing through the opening of the bayonet 231, thereby fixing the relative position between the inflation tube 300 and the air guide tube 200.

[0042] Understandably, referring to Figure 1 The airway 200, inflation tube 300, and cap 100 are all made of silicone. The elasticity of the silicone allows the airway 200, inflation tube 300, and cap 100 to undergo elastic bending deformation, thereby adapting to the physiological structure of the oral cavity and pharynx. Furthermore, the biocompatibility of the silicone reduces the possibility of physiological rejection in patients.

[0043] The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present utility model.

Claims

1. A laryngeal mask airway, characterized in that, include: A bladder that can be inflated and fixed inside the larynx; An air duct, one end of which is connected to the mask, is configured as a flexible section and a reinforcing section in sequence along the axial direction away from the mask. The flexible section is located at the throat and inside the oral cavity and is flexible and deformable. The reinforcing section is located at the teeth and outside the oral cavity and is reinforced with steel wire ribs inside its tube wall. An inflation tube, one end of which is connected to the inner cavity of the bladder, and the other end of which is connected to a one-way valve.

2. The laryngeal mask according to claim 1, characterized in that, The steel wire reinforcing ribs are spirally arranged inside the pipe wall of the reinforcing section and extend along the axial direction of the reinforcing section.

3. The laryngeal mask according to claim 1, characterized in that, The steel wire reinforcing ribs are arranged in a mesh pattern inside the pipe wall of the reinforced section.

4. The laryngeal mask according to claim 1, characterized in that, A pressure gauge is connected to the end of the inflation tube furthest from the bladder, and the pressure gauge is used to detect the air pressure of the bladder.

5. The laryngeal mask according to claim 4, characterized in that, The end of the inflation tube furthest from the bladder is connected to a T-joint, and the other two ports of the T-joint are respectively connected to the one-way valve and the pressure gauge.

6. The laryngeal mask according to claim 1, characterized in that, The end of the airway tube furthest from the mask is connected to a carbon dioxide detector, which is used to detect the carbon dioxide concentration at the end of expiration.

7. The laryngeal mask according to claim 1, characterized in that, The outer wall of the air duct is provided with graduation lines along the axial direction.

8. The laryngeal mask according to claim 1, characterized in that, The outer wall of the reinforcing section has a protruding locking block with a slot, into which the inflation tube can be inserted.

9. The laryngeal mask according to claim 1, characterized in that, The air duct, the inflation tube, and the bladder are all made of silicone.

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