CN111905213A

CN111905213A - Laryngeal mask

Info

Publication number: CN111905213A
Application number: CN202010991683.7A
Authority: CN
Inventors: 方峥评
Original assignee: Anhui Exploration Medical Device Technology Co ltd
Current assignee: Anhui Exploration Medical Device Technology Co ltd
Priority date: 2020-09-17
Filing date: 2020-09-17
Publication date: 2020-11-10

Abstract

The invention discloses a laryngeal mask, which comprises a tube body and a mask body, wherein the tube body is provided with a tube connecting end, the mask body is provided with a mask connecting end, the mask connecting end is hermetically connected with the tube connecting end, the tube body is used for allowing breathing gas to enter the respiratory tract of a patient through the mask body and discharging waste liquid generated in the implantation ventilation process through the mask body, and the mask body is provided with a limiting part for limiting the mask body to move in the throat after being implanted into the throat of the patient. The technical scheme of the invention can solve the problem that the laryngeal mask is easy to move after being implanted into the throat of a patient, so that the ventilation process of the implanted laryngeal mask is obstructed.

Description

Laryngeal mask

Technical Field

The invention relates to the technical field of medical instruments, in particular to a laryngeal mask.

Background

The laryngeal mask is an artificial airway device, which can not only enable a patient to keep breathing autonomously in the operation process, but also implement positive pressure ventilation. Present laryngeal mask includes the cover body and body usually, and the cover body has for the breathing cavity with the respiratory track intercommunication, and the body is connected with the cover body to provide breathing gas to breathing cavity, still set up the gasbag on the cover body, utilize gasbag and patient's the sealed butt of breathing road junction, breathe in order to ensure that the breathing gas gets into smoothly and supplies the patient to breathe. In order to avoid the laryngeal mask from being implanted to damage the throat of the patient, the laryngeal mask is made of smooth and easy-to-implant materials, so that the laryngeal mask is easy to move after being implanted into the throat of the patient, and the ventilation process of the implanted laryngeal mask is hindered.

Disclosure of Invention

The invention mainly aims to provide a laryngeal mask, and aims to solve the problem that after the laryngeal mask is implanted into the throat of a patient, the laryngeal mask is easy to move and obstructs the ventilation process after the laryngeal mask is implanted.

In order to achieve the above object, the present invention provides a laryngeal mask, comprising: a tube body having a tube connection end; the mask body is provided with a mask connecting end which is hermetically connected with the tube connecting end, and the tube body is used for allowing respiratory gas to enter the respiratory tract of a patient through the mask body and discharging waste liquid generated in the implantation ventilation process through the mask body; the mask body is provided with a limiting part used for limiting the mask body to move in the throat after being implanted into the throat of a patient.

Optionally, the mask body has a rear side facing away from the respiratory tract, and the limiting part is arranged on the surface of the rear side.

Optionally, the position-limiting part is a concave groove relative to the surface of the rear side.

Optionally, the mask body further has a mask insertion end opposite the mask connection end, and the groove is elongated and extends from the mask connection end to the mask insertion end.

Optionally, the tube has an alimentary tract, and the housing has an alimentary chamber in communication with the alimentary tract; the digestion chamber comprises a first sub-chamber and a second sub-chamber, and a communication channel is arranged between the first sub-chamber and the second sub-chamber; the rear side wall of the digestion chamber is provided with a circulating port for waste liquid generated in the implantation and ventilation process to enter the digestion chamber; the digestive tract comprises a first sub-tract and a second sub-tract, the first sub-tract is communicated with the first sub-chamber, the second sub-tract is communicated with the second sub-chamber, and the first sub-tract is used for allowing a cleaner to enter the digestive chamber so as to flush waste liquid generated in the implantation and ventilation process into the second sub-tract through the communicating channel and discharge the waste liquid out of the body of a patient.

Optionally, the groove is disposed beside the circulation port.

Optionally, the circulation port includes a first sub port and a second sub port, the first sub port is disposed in the first sub chamber, and the second sub port is disposed in the second sub chamber.

Optionally, the number of the grooves is two, and the two grooves are respectively arranged on the outer side wall of the first sub-chamber and the outer side wall of the second sub-chamber.

Optionally, the two grooves are arranged in a splayed shape.

Optionally, the edge of the groove smoothly transitions with the surface of the rear side.

According to the technical scheme, the pipe body is connected with the cover body in a sealing mode, the pipe body is used for allowing breathing gas to enter respiratory tracts of patients, waste liquid generated in the process of implantation ventilation is discharged by the pipe body, meanwhile, the limiting part is arranged on the cover body, and the limiting part is used for limiting the movement of the cover body in the throat of the patients after the cover body is implanted into the throat of the patients, so that the laryngeal mask is kept stable and does not move randomly after being implanted into the throat of the patients, and the implantation ventilation process is carried out smoothly.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.

Figure 1 is a rear view of an embodiment of a laryngeal mask in accordance with the invention;

figure 2 is a right side view of the laryngeal mask of figure 1;

figure 3 is a schematic view of the laryngeal mask of figure 1 from another perspective;

figure 4 is a schematic view of the laryngeal mask of figure 1 from a further perspective;

figure 5 is a front view of the laryngeal mask of figure 1.

The reference numbers illustrate:

reference numerals	Name (R)	Reference numerals	Name (R)
				100	Pipe body	212	Limiting groove
101	Pipe connection end	220	Breathing mouth
				110	Respiratory tract	230	Digestion chamber
120	Digestive tract	231	First sub-chamber
				121	The first sub-channel	232	Second sub-chamber
122	Second sub-channel	240	Digestion port
				200	Cover body	250	Circulation port
201	Mask connection end	251	First sub-opening
				202	Hood implant end	252	Second sub-port
210	Breathing chamber	260	Guide ridge
				211	Boss	270	Groove

The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that, if directional indications (such as up, down, left, right, front, and back … …) are involved in the embodiment of the present invention, the directional indications are only used to explain the relative positional relationship between the components, the movement situation, and the like in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indications are changed accordingly.

In addition, if there is a description of "first", "second", etc. in an embodiment of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, if appearing throughout the text, "and/or" is meant to include three juxtaposed aspects, taking "A and/or B" as an example, including either the A aspect, or the B aspect, or both A and B satisfied aspects. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.

The invention provides a laryngeal mask.

In one embodiment of the present invention, as shown in fig. 1 and 2, the laryngeal mask includes a tube 100 and a mask body 200, the tube 100 having a tube connecting end 101, the mask body 200 having a mask connecting end 201, the mask connecting end 201 being sealingly connected to the tube connecting end 101. Wherein, body 100 is used for supplying the respiratory tract that the breathing gas got into the patient through cover body 200, and the breathing gas circulates to cover body 200 through body 100 promptly, then gets into the respiratory tract of patient through cover body 200 and supply the patient to breathe, and body 100 still is used for supplying the waste liquid that produces in the implantation ventilation process to discharge through cover body 200, and the waste liquid that produces in the implantation ventilation process promptly gets into body 100 through cover body 200, then discharges outside the patient from body 100.

According to the technical scheme, the tube body 100 is connected with the cover body 200 in a sealing mode, the tube body 100 is used for allowing breathing gas to enter the respiratory tract of a patient, the tube body 100 is used for discharging waste liquid generated in the implantation ventilation process, meanwhile, the limiting part is arranged on the cover body 200, and the limiting part is used for limiting the movement of the cover body 200 in the throat of the patient after the cover body 200 is implanted in the throat of the patient, so that the laryngeal mask is kept stable and does not move randomly after being implanted in the throat of the patient, and the implantation ventilation process is carried out smoothly.

In one embodiment, the mask body 200 has a rear side facing away from the respiratory tract, and the position-limiting portion is disposed on a surface of the rear side. When patient's larynx is implanted to the laryngeal mask, one side of the cover body 200 towards respiratory track need with breathe the sealed butt of road junction to the sealed effect of guarantee, and the surface of rear side is located to spacing portion, when carrying on spacingly to the laryngeal mask, can not influence the sealed butt state between one side of the cover body 200 towards respiratory track and the breathing road junction, thereby when guarantee laryngeal mask implanted patient's larynx after keep stable, guarantee laryngeal mask and patient's larynx between sealed effect.

In one embodiment, the limiting portion is a concave groove 270 relative to the surface of the rear side. Spacing portion is formed through the recessed recess 270 of lower surface for the rear side, and when the laryngeal mask was implanted, the tissue part of throat was absorbed in recess 270, played limiting displacement, prevented that the laryngeal mask from implanting the back and removed at will to, the area of contact of the cover body 200 with the throat has been increased in setting up of recess 270, thereby the friction between the increase cover body 200 and the throat further made the laryngeal mask be difficult to remove at will after implanting.

Referring to fig. 3, in one embodiment mask body 200 also has a mask insertion end 202 opposite mask connection end 201, and recess 270 is elongated and extends from mask connection end 201 toward mask insertion end 202. Through setting up recess 270 as the rectangular form that extends from mask connection end 201 to mask implantation end 202 for the space that recess 270 took on the surface of cover body 200 is great, thereby plays limiting displacement better, prevents that the laryngeal mask from implanting the back and removing at will.

Referring to fig. 1 and 4, in one embodiment, the tube 100 has an alimentary canal 120, the housing 200 has an alimentary chamber 230 in communication with the alimentary canal 120, the alimentary chamber 230 has an alimentary port 240 in communication with the alimentary canal; the digestion chamber 230 comprises a first sub-chamber 231 and a second sub-chamber 232, and a communication channel is arranged between the first sub-chamber 231 and the second sub-chamber 232; the rear side wall of the digestion chamber 230 is provided with a circulating port 250 for waste liquid generated in the implantation and ventilation process to enter the digestion chamber 230; the digestive tract 120 comprises a first sub-tract 121 and a second sub-tract 122, the first sub-tract 121 is communicated with the first sub-chamber 231, the second sub-tract 122 is communicated with the second sub-chamber 232, and the first sub-tract 121 is used for allowing cleaning matters to enter the digestive chamber 230 so as to flush waste liquid generated in the implantation ventilation process into the second sub-tract 122 through a communication channel and discharge the waste liquid out of the patient. Namely, the circulation port 250, the first sub-chamber 231, the communication channel, the second sub-chamber 232, and the second sub-chamber 122 form a waste liquid discharge channel.

It is understood that in this embodiment, the tube 100 further has a breathing lumen 110, the mask 200 further has a breathing chamber 210 communicating with the breathing lumen 110, and the breathing chamber 210 has a breathing port 220 communicating with the respiratory tract. During the implantation ventilation process, the breathing gas enters the breathing chamber 210 through the breathing cavity 110, so that the breathing gas is provided for the patient, and the patient can breathe normally during the implantation ventilation process; the first sub-cavity channel 121 is connected with a suction source, the second sub-cavity channel 122 is connected with a positive pressure source or is communicated with the atmosphere, or the second sub-cavity channel 122 is connected with the suction source, the first sub-cavity channel 121 is connected with the positive pressure source or is communicated with the atmosphere, so that waste liquid such as saliva, gastric juice and blood generated by a patient firstly enters the digestion chamber 230 through the circulation port 250 or the digestion port 240 under the action of the suction source and then is discharged out of the body of the patient through the first sub-cavity channel 121 or the second sub-cavity channel 122 which is communicated with the digestion chamber 230 in the implantation ventilation process, and discomfort of the patient caused by the fact that the waste liquid generated in the implantation ventilation process of the patient enters the respiratory tract is effectively avoided.

In an embodiment, the first sub-cavity channel 121, the second sub-cavity channel 122 and the breathing cavity channel 110 are parallel to each other, so that the thicknesses of the cavity wall of the first sub-cavity channel 121, the cavity wall of the second sub-cavity channel 122 and the cavity wall of the breathing cavity channel 110 are uniform at each position in the length direction of the tube body 100, and thus the tube body 100 is more stable in structure and is not easy to break.

In an embodiment, the cross section of the tube 100 is oval, that is, the tube 100 is a flat tube, on the same cross section of the tube 100, the center of the respiratory tract 110 coincides with the center of the oval, the first sub-tract 121 and the second sub-tract 122 are symmetrically disposed on both sides of the respiratory tract 110, and at the same time, the cover 200 is also flat, and the digestive tract 240 is also oval, that is, the shape of the digestive tract 240 is adapted to the distribution positions of the first tract and the second tract, so that the waste liquid can be discharged more quickly.

In one embodiment, the groove 270 is disposed beside the circulation port 250. Through setting up recess 270 in the side of circulation mouth 250, make recess 270 avoid the position setting of circulation mouth 250 to make behind the laryngeal mask implantation patient's larynx, recess 270 is kept apart with circulation mouth 250, thereby avoids implanting the spacing effect that influences recess 270 in the waste liquid entering recess 270 that the ventilation in-process produced.

In one embodiment, the circulation port 250 includes a first sub-port 251 and a second sub-port 252, the first sub-port 251 is disposed in the first sub-chamber 231, and the second sub-port 252 is disposed in the second sub-chamber 232. By respectively arranging the first sub-port 251 and the second sub-port 252 corresponding to the first sub-chamber 231 and the second sub-chamber 232, the passage of waste liquid into the digestion chamber 230 is increased in the circulation process of waste liquid generated in the implantation and ventilation process, and the waste liquid generated in the implantation and ventilation process is discharged out of the body of a patient in time.

In an embodiment, there are two grooves 270, and the two grooves 270 are respectively disposed on the outer side wall of the first sub-chamber 231 and the outer side wall of the second sub-chamber 232, so as to enhance the limiting effect and further prevent the laryngeal mask from moving freely after being implanted.

In one embodiment, the two grooves 270 are arranged in a splayed configuration to simultaneously limit the mask body 200 on both the left and right sides of the mask body 200, so that the laryngeal mask can better remain stable during implantation ventilation.

In the above embodiment, the edge of the groove 270 smoothly transitions with the surface of the back side, so that the groove 270 does not damage the tissue of the patient's throat while serving as a limit.

Referring to fig. 4 and 5, in an embodiment, the mask body 200 further has a front side facing the respiratory tract, the respiratory orifice 220 is disposed on the front side, the rear side of the laryngeal mask is arched, a boss 211 is disposed in the respiratory chamber 210, the boss 211 has an inclined surface facing the respiratory tract 110 and the respiratory orifice 220, so that when the laryngeal mask is implanted in the throat of a patient, the mask body 200 deforms under the action of the extrusion force of the throat, and one end of the mask body 200, which is inserted into the throat first, is drawn close to the arched inward recess, so that the shape of the respiratory orifice 220 changes, and the boss 211 is driven to approach the plane where the respiratory orifice 220 is located, so that the mask body 200 fits with the opening of the respiratory tract more, thereby reducing air dead space and facilitating the; and the setting of boss 211 makes implantation ventilation in-process, and when operating personnel inserted the respiratory track with the inspection device through breathing chamber 210, the inclined plane of boss 211 can play the guide effect to the inspection device, made the inspection device can insert the respiratory track more accurately, reduced the probability that the inspection device stabbed the respiratory track wall.

In an embodiment, the protrusion 211 and the sidewall of the breathing chamber 210 are smoothly transited, so that the protrusion 211 guides the inserted inspection device, and the inspection device can more smoothly pass through the connection between the protrusion 211 and the sidewall of the breathing channel 110, thereby making the insertion of the inspection device more smooth.

In one embodiment, the edge of the boss 211 away from the respiratory tract 110 is rounded. When the boss 211 is close to the plane where the breathing hole 220 is under the driving of the cover body 200 which deforms, the boss 211 may contact with the throat, and when the boss 211 contacts with the throat, the fillet arranged at the edge of the boss 211 reduces the stimulation of the boss 211 to the throat, thereby reducing the discomfort of the patient caused by the three-cavity flushable fish-mouth type laryngeal mask airway tube.

In an embodiment, the boss 211 is provided with a limiting groove 212 extending from the breathing cavity 110 to the breathing port 220, when the checking device is inserted from the breathing cavity 110, the limiting groove 212 can guide and limit the checking device, so that the checking device can be inserted into a required position more accurately, and the checking device is not easy to move randomly after being inserted, thereby ensuring that the implantation and ventilation process is smoother.

In an embodiment, the boss 211 is provided with a plurality of spacing grooves 212 at intervals, so that the insertion position of the inspection device has more choices, and an operator can select different spacing grooves 212 according to actual requirements.

In one embodiment, the cross section of the limiting groove 212 is arc-shaped, and the checking device generally comprises a cylindrical tubular structure, so that the limiting groove 212 with the arc-shaped cross section can be more attached to the checking device, and the guiding and limiting effect of the limiting groove 212 on the checking device is better.

Referring to fig. 1 and 2, in an embodiment of the present invention, the laryngeal mask includes a tube 100 and a mask body 200, the tube 100 has a tube connection end 101, the mask body 200 has a mask connection end 201, the mask connection end 201 is hermetically connected to the tube connection end 101, the tube 100 is provided with a breathing cavity 110, the mask body 200 is provided with a breathing cavity 210 and a breathing orifice 220, the breathing cavity 110 is used for breathing gas to flow through, the breathing cavity 210 is communicated with the breathing cavity 110, the breathing orifice 220 is used for communicating the breathing cavity 210 with a respiratory tract, and the mask body 200 is provided with a guide ridge 260, the guide ridge 260 extends along a length direction of the laryngeal mask and protrudes from a surface of the mask body 200. When the laryngeal mask is implanted into the throat of a patient, the breathing cavity 210 is communicated with the respiratory tract of the patient through the breathing port 220, breathing gas enters the breathing cavity 210 through the breathing cavity channel 110 and then enters the respiratory tract of the patient through the breathing port 220, and therefore the patient can breathe normally when the laryngeal mask is implanted into the throat of the patient.

The technical scheme of the invention is that a breathing cavity channel 110 for the circulation of breathing gas is arranged on a tube body 100, a breathing chamber 210 communicated with the breathing cavity channel 110 is arranged on a mask body 200, a breathing hole 220 is arranged on the mask body 200, when the laryngeal mask is implanted into the throat of a patient, the breathing chamber 210 is communicated with the breathing passage of the patient by using the breathing hole 220, a guide ridge 260 extending along the length direction of the laryngeal mask is arranged on the mask body 200, and the guide ridge 260 protrudes out of the surface of the mask body 200, so that the guide ridge 260 protruding out of the surface of the mask body 200 and throat tissues are mutually pressed in the process of implanting the laryngeal mask into the throat of the patient, the guide ridge 260 and the pressed and sunken throat tissues form a guide structure, the extending direction of the guide structure is the same as the initial implanting direction of the laryngeal mask, thereby solving the problem that the initial implanting direction is easy to deviate in the implanting process of the laryngeal mask, and the implanting direction needs to be adjusted in time, leading to the problem of inconvenience of the implantation procedure.

It will be appreciated that in the above embodiments, the cap 200 is attached to the tube 100, and the direction in which the cap 200 is attached to the tube 100 is the length direction of the laryngeal mask. In addition, the guide ridge 260 may be embodied in such a manner that a protrusion is formed on the surface of the laryngeal mask to be higher than the surface of the laryngeal mask, the middle portion of the protrusion is highest, and both sides of the protrusion gradually decrease to be flush with the rear surface of the laryngeal mask, so that the guide ridge 260 is formed.

In one embodiment, the laryngeal mask has opposing anterior and posterior sides, with the breathing orifice 220 provided on the anterior side and the guide ridge 260 provided on the posterior side. When the laryngeal mask is implanted into the throat of a patient, the breathing hole 220 positioned on the front side is communicated with the respiratory tract of the patient, therefore, for ensuring the sealing effect between the laryngeal mask and the throat of the patient, the front side needs to be abutted against the tissue of the throat of the patient as much as possible in a sealing manner, the guide ridge 260 is arranged on the rear side in the embodiment, the guide ridge 260 is utilized to play a guiding role in the implantation process, the sealing effect between the mask body 200 and the throat of the patient is prevented from being influenced by the guide ridge 260, after the laryngeal mask is implanted, the front side of the mask body 200 can be better sealed with the throat of the patient, and the breathing gas can be smoothly obtained by.

In one embodiment, the guide ridge 260 is provided at the junction of the tube 100 and the housing 200. Because the structure of the mask body 200 is different from that of the tube body 100, the connection part of the mask body 200 and the tube body 100 is easier to be extruded and deformed in the process of implanting the laryngeal mask into the throat of a patient, so that the implantation direction is easier to deviate in the implantation process, and the guide ridge 260 is arranged at the connection part of the tube body 100 and the mask body 200, so that the guide effect can be better played in the implantation process. In addition, the guiding ridge 260 also plays a role in enhancing the structural strength of the joint of the mask body 200 and the tube body 100, so that the joint of the mask body 200 and the tube body 100 is not easy to bend in the implantation process of the laryngeal mask, and the channel at the joint of the mask body 200 and the tube body 100 is prevented from being blocked due to bending, so that the breathing cavity 110 and the breathing cavity 210 are kept communicated.

In one embodiment, one end of the guiding ridge 260 extends to the mask connection end 201, and the other end extends to the tube connection end 101, that is, both ends of the guiding ridge 260 extend towards the mask body 200 and the tube body 100 respectively, so that the guiding ridge 260 transitions with the mask body 200 and the tube body 100, thereby better playing a guiding role in the implantation process.

In one embodiment, the posterior surface of the laryngeal mask has opposite left and right sides, and the guide ridge 260 is provided between the left and right sides, i.e., the guide ridge 260 is provided at or near the middle of the laryngeal mask in the left-right direction, thereby more smoothly performing a guiding function during implantation.

In one embodiment, the guide ridge 260 is rounded at a middle portion in the left-right direction, so as to prevent the guide ridge 260 from damaging the tissue of the patient's throat during the implantation process.

In one embodiment, the guide ridge 260, the tube 100, and the cover 200 are integrally formed. The processing mode of integrated into one piece is simple and convenient to, and each junction of direction spine 260, body 100 and cover body 200 is smooth, avoids the junction scratch patient's larynx.

In one embodiment, the laryngeal mask is arcuate in shape along its length to accommodate the shape of the larynx and thereby facilitate implantation of the laryngeal mask.

In one embodiment, the rear surface of the laryngeal mask is convexly curved. The outer surface of the rear surface of the laryngeal mask is set to be a convex cambered surface, so that the laryngeal mask can enter the throat more smoothly.

In the above embodiments, the guiding ridges 260 smoothly transition with the posterior surface of the mask body 200 and the guiding ridges 260 smoothly transition with the posterior surface of the tube 100, so that the implantation of the laryngeal mask is smoother and less likely to cause damage to the patient's larynx.

The above description is only an alternative embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications and equivalents of the present invention, which are made by the contents of the present specification and the accompanying drawings, or directly/indirectly applied to other related technical fields, are included in the scope of the present invention.

Claims

1. A laryngeal mask, comprising:

a tube body having a tube connection end; and the number of the first and second groups,

the mask body is provided with a mask connecting end which is hermetically connected with the tube connecting end, and the tube body is used for allowing respiratory gas to enter the respiratory tract of a patient through the mask body and discharging waste liquid generated in the implantation ventilation process through the mask body; the mask body is provided with a limiting part used for limiting the mask body to move in the throat after being implanted into the throat of a patient.

2. The laryngeal mask according to claim 1, wherein the mask body has a rear side facing away from the respiratory tract, the stop being provided on a surface of the rear side.

3. A laryngeal mask according to claim 2, characterised in that the stop is a groove which is concave with respect to the surface of the rear side.

4. The laryngeal mask of claim 3, wherein the mask body further has a mask insertion end opposite the mask attachment end, the groove being elongate and extending from the mask attachment end toward the mask insertion end.

5. The laryngeal mask according to claim 3, wherein the tube has an alimentary canal, the mask having an alimentary chamber in communication with the alimentary canal;

the digestion chamber comprises a first sub-chamber and a second sub-chamber, and a communication channel is arranged between the first sub-chamber and the second sub-chamber; the rear side wall of the digestion chamber is provided with a circulating port for waste liquid generated in the implantation and ventilation process to enter the digestion chamber;

the digestive tract comprises a first sub-tract and a second sub-tract, the first sub-tract is communicated with the first sub-chamber, the second sub-tract is communicated with the second sub-chamber, and the first sub-tract is used for allowing a cleaner to enter the digestive chamber so as to flush waste liquid generated in the implantation and ventilation process into the second sub-tract through the communicating channel and discharge the waste liquid out of the body of a patient.

6. A laryngeal mask according to claim 5, characterised in that the groove is provided to the side of the circulation opening.

7. The laryngeal mask of claim 6, wherein the circulation port comprises a first sub-port and a second sub-port, the first sub-port being disposed in the first sub-chamber and the second sub-port being disposed in the second sub-chamber.

8. A laryngeal mask according to claim 7, characterised in that there are two grooves, the two grooves being provided on the outer side wall of the first sub-chamber and the outer side wall of the second sub-chamber respectively.

9. The laryngeal mask according to claim 8, characterised in that two of the grooves are in a splayed arrangement.

10. A laryngeal mask according to any one of claims 1-9, characterised in that the edge of the groove transitions smoothly with the surface of the rear side.