Laryngeal mask

Abstract

The present invention discloses a laryngeal mask, comprising a tube body and a mask body, wherein the tube body has a tube connection end, the mask body has a mask connection end, the mask connection end is sealed and connected to the tube connection end, the tube body is used for allowing respiratory gas to enter the patient's respiratory tract through the mask body, and for allowing waste liquid generated during implantation and ventilation to be discharged through the mask body, and the mask body is provided with a limiter for limiting the movement of the mask body in the patient's larynx after being implanted in the patient's larynx. The technical solution of the present invention can solve the problem that after the laryngeal mask is implanted in the patient's larynx, the laryngeal mask is easily moved, which hinders the ventilation process after the laryngeal mask is implanted.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and in particular to a laryngeal mask. Background Art

[0002] The laryngeal mask is an artificial airway device that allows the patient to maintain spontaneous breathing during surgery and implement positive pressure ventilation. The current laryngeal mask usually includes a mask body and a tube body. The mask body has a breathing chamber for communicating with the respiratory tract. The tube body is connected to the mask body to provide breathing gas to the breathing chamber. An air bag is also provided on the mask body, which is sealed against the patient's respiratory opening to ensure that the breathing gas can enter smoothly for the patient to breathe. In order to avoid damaging the patient's larynx during laryngeal mask implantation, the laryngeal mask is usually made of smooth and easy-to-implant material. This also makes it easy for the laryngeal mask to move after being implanted in the patient's larynx, hindering the ventilation process after the laryngeal mask is implanted. Summary of the invention

[0003] The main purpose of the present invention is to provide a laryngeal mask, which aims to solve the problem that after the laryngeal mask is implanted in the patient's larynx, the laryngeal mask is easy to move, thereby hindering the ventilation process after the laryngeal mask is implanted.

[0004] To achieve the above-mentioned purpose, the laryngeal mask proposed in the present invention includes: a tube body, the tube body having a tube connecting end; and a mask body, having a mask connecting end, the mask connecting end being sealed and connected to the tube connecting end, the tube body being used to allow breathing gas to enter the patient's respiratory tract through the mask body, and to allow waste liquid generated during implantation and ventilation to be discharged through the mask body; the mask body is provided with a limiting portion for limiting the movement of the mask body in the patient's larynx after being implanted in the patient's larynx.

[0005] Optionally, the mask body has a rear side facing away from the respiratory tract, and the limiting portion is arranged on a surface of the rear side.

[0006] Optionally, the limiting portion is a groove that is recessed relative to the surface of the rear side.

[0007] Optionally, the cover body further has a cover implantation end opposite to the cover connection end, and the groove is in the shape of an elongated strip and extends from the cover connection end to the cover implantation end.

[0008] Optionally, the tube body has a digestive cavity, and the cover body has a digestive chamber connected to the digestive cavity; the digestive chamber includes a first sub-chamber and a second sub-chamber, and a connecting passage is provided between the first sub-chamber and the second sub-chamber; the rear side wall of the digestive chamber is provided with a circulation port for allowing waste liquid generated during the implantation ventilation process to enter the digestive cavity; the digestive cavity includes a first sub-chamber and a second sub-chamber, the first sub-chamber is connected to the first sub-chamber, and the second sub-chamber is connected to the second sub-chamber, and the first sub-chamber is used for allowing cleaning materials to enter the digestive cavity, so as to flush the waste liquid generated during the implantation ventilation process into the second sub-chamber through the connecting passage and discharge it from the patient's body.

[0009] Optionally, the groove is arranged beside the circulation port.

[0010] Optionally, the circulation port includes a first sub-port and a second sub-port, the first sub-port is arranged in the first sub-chamber, and the second sub-port is arranged in the second sub-chamber.

[0011] Optionally, two grooves are provided, and the two grooves are respectively provided on the outer side wall of the first sub-chamber and the outer side wall of the second sub-chamber.

[0012] Optionally, the two grooves are arranged in an eight-shaped pattern.

[0013] Optionally, the edge of the groove transitions smoothly with the surface of the rear side.

[0014] The technical solution of the present invention adopts the method of sealingly connecting the tube body and the mask body, using the tube body to supply breathing gas to enter the patient's respiratory tract, and using the tube body to discharge waste liquid generated during the implantation ventilation process. At the same time, a limit part is arranged on the mask body, and the limit part is used to limit the movement of the mask body in the throat after it is implanted in the patient's throat, so that when the laryngeal mask is implanted in the patient's throat, it remains stable and does not move at will, thereby allowing the implantation ventilation process to proceed smoothly. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0016] Figure 1 A rear view of an embodiment of a laryngeal mask according to the present invention;

[0017] Figure 2 for Figure 1 Right view of the middle laryngeal mask;

[0018] Figure 3 for Figure 1 A schematic diagram of the structure of the middle laryngeal mask from another perspective;

[0019] Figure 4 for Figure 1 A schematic diagram of the structure of the medium laryngeal mask from another perspective;

[0020] Figure 5 for Figure 1 Front view of the medium laryngeal mask.

[0021] Description of Figure Numbers:

[0022] Label name Label name 100 tube body 212 Limit slot 101 Pipe connection end 220 Breathing port 110 Respiratory cavity 230 Digestive chamber 120 Digestive tract 231 First subchamber 121 The first sub-cavity 232 Second subchamber 122 The second sub-cavity 240 Digestive system 200 Cover 250 Circulation port 201 Hood connection end 251 The first sub-port 202 Implantation end 252 The second sub-port 210 Breathing Chamber 260 Guide ridge 211 Boss 270 Grooves

[0023] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0025] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0026] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, if the meaning of "and / or" appearing in the full text is to include three parallel schemes, taking "A and / or B" as an example, it includes scheme A, or scheme B, or a scheme that satisfies both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0027] The invention provides a laryngeal mask.

[0028] In one embodiment of the present invention, Figure 1 and Figure 2 As shown, the laryngeal mask comprises a tube body 100 and a mask body 200, wherein the tube body 100 has a tube connection end 101, and the mask body 200 has a mask connection end 201, and the mask connection end 201 is sealed and connected to the tube connection end 101. The tube body 100 is used for allowing breathing gas to enter the patient's respiratory tract through the mask body 200, that is, the breathing gas flows through the tube body 100 to the mask body 200, and then enters the patient's respiratory tract through the mask body 200 for the patient to breathe, and the tube body 100 is also used for allowing waste liquid generated during implantation and ventilation to be discharged through the mask body 200, that is, the waste liquid generated during implantation and ventilation enters the tube body 100 through the mask body 200, and then is discharged from the tube body 100 out of the patient's body.

[0029] The technical solution of the present invention adopts the method of sealingly connecting the tube body 100 and the mask body 200, using the tube body 100 to supply breathing gas to enter the patient's respiratory tract, and using the tube body 100 to discharge the waste liquid generated during the implantation ventilation process. At the same time, a limit portion is provided on the mask body 200, and the limit portion is used to limit the movement of the mask body 200 in the throat after being implanted in the patient's throat, so that when the laryngeal mask is implanted in the patient's throat, it remains stable and does not move at will, thereby allowing the implantation ventilation process to proceed smoothly.

[0030] In one embodiment, the mask body 200 has a rear side facing away from the respiratory tract, and the limiting portion is disposed on the surface of the rear side. When the laryngeal mask is implanted in the patient's larynx, the side of the mask body 200 facing the respiratory tract needs to be in sealing contact with the respiratory tract opening to ensure the sealing effect, and the limiting portion is disposed on the rear surface, while limiting the position of the laryngeal mask, it will not affect the sealing contact state between the side of the mask body 200 facing the respiratory tract and the respiratory tract opening, thereby ensuring that the laryngeal mask remains stable after being implanted in the patient's larynx, while ensuring the sealing effect between the laryngeal mask and the patient's larynx.

[0031] In one embodiment, the limiting portion is a groove 270 that is concave relative to the surface of the rear side. The limiting portion is formed by the groove 270 that is concave relative to the lower surface of the rear side. When the laryngeal mask is implanted, the tissue part of the larynx sinks into the groove 270, which plays a limiting role and prevents the laryngeal mask from moving randomly after implantation. In addition, the provision of the groove 270 increases the contact area between the mask body 200 and the larynx, thereby increasing the friction between the mask body 200 and the larynx, further making it difficult for the laryngeal mask to move randomly after implantation.

[0032] Reference Figure 3 In one embodiment, the mask body 200 further has a mask implantation end 202 opposite to the mask connection end 201, and the groove 270 is in a long strip shape and extends from the mask connection end 201 to the mask implantation end 202. By setting the groove 270 in a long strip shape extending from the mask connection end 201 to the mask implantation end 202, the groove 270 occupies a larger space on the surface of the mask body 200, thereby better playing a limiting role and preventing the laryngeal mask from moving randomly after implantation.

[0033] Reference Figure 1 and Figure 4 In one embodiment, the tube body 100 has a digestive cavity 120, the cover body 200 has a digestive cavity 230 connected to the digestive cavity 120, and the digestive cavity 230 has a digestive port 240 connected to the digestive tract; the digestive cavity 230 includes a first sub-chamber 231 and a second sub-chamber 232, and a connecting passage is provided between the first sub-chamber 231 and the second sub-chamber 232; the rear side wall of the digestive cavity 230 is provided with a circulation port 250 for allowing waste liquid generated during implantation ventilation to enter the digestive cavity 230; the digestive cavity 120 includes a first sub-chamber 121 and a second sub-chamber 122, the first sub-chamber 121 is connected to the first sub-chamber 231, and the second sub-chamber 122 is connected to the second sub-chamber 232, and the first sub-chamber 121 is used for allowing cleaning materials to enter the digestive cavity 230, so as to flush the waste liquid generated during implantation ventilation into the second sub-chamber 122 through the connecting passage and discharge it from the patient's body. That is, 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.

[0034] It can be understood that, in this embodiment, the tube body 100 further has a breathing cavity 110, the mask body 200 further has a breathing chamber 210 connected to the breathing cavity 110, and the breathing chamber 210 has a breathing port 220 connected to the breathing duct. During the implant ventilation process, respiratory gas enters the respiratory chamber 210 through the respiratory cavity 110, thereby providing respiratory gas for the patient and ensuring that the patient can breathe normally during the implant ventilation process; the first sub-cavity 121 is connected to the suction source and the second sub-cavity 122 is connected to the positive pressure source or connected to the atmosphere, or the second sub-cavity 122 is connected to the suction source and the first sub-cavity 121 is connected to the positive pressure source or connected to the atmosphere, so that during the implant ventilation process, the patient's saliva, gastric juice, blood and other waste liquids first enter the digestion chamber 230 through the circulation port 250 or the digestion port 240 under the action of the suction source, and then are discharged from the patient's body through the first sub-cavity 121 or the second sub-cavity 122 connected to the digestion chamber 230, thereby effectively preventing the waste liquid generated during the patient's implant ventilation from entering the respiratory tract and causing discomfort to the patient.

[0035] In one embodiment, the first sub-cavity 121, the second sub-cavity 122 and the respiratory cavity 110 are arranged parallel to each other, so that the cavity wall of the first sub-cavity 121, the cavity wall of the second sub-cavity 122 and the cavity wall of the respiratory cavity 110 are uniform in thickness at all locations along the length direction of the tube body 100, thereby making the structure of the tube body 100 more stable and not easy to break.

[0036] In one embodiment, the cross-section of the tube body 100 is elliptical, that is, the tube body 100 is a flat tube. On the same cross-section of the tube body 100, the center of the respiratory cavity 110 coincides with the center of the ellipse, and the first sub-cavity 121 and the second sub-cavity 122 are symmetrically arranged on both sides of the respiratory cavity 110. At the same time, the mask body 200 is also flat, and the digestion port 240 is also elliptical, that is, the shape of the digestion port 240 is adapted to the distribution position of the first cavity and the second cavity, so that the waste liquid can be discharged more quickly.

[0037] In one embodiment, the groove 270 is disposed beside the circulation port 250. By disposing the groove 270 beside the circulation port 250, the groove 270 is arranged away from the circulation port 250, so that after the laryngeal mask is implanted in the patient's throat, the groove 270 is isolated from the circulation port 250, thereby preventing waste liquid generated during the implantation ventilation process from entering the groove 270 and affecting the limiting function of the groove 270.

[0038] In one embodiment, the circulation port 250 includes a first sub-port 251 and a second sub-port 252, wherein 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 disposing the first sub-port 251 and the second sub-chamber 232 corresponding to the first sub-chamber 231 and the second sub-chamber 232, the channels for the waste liquid generated during the implantation ventilation process to enter the digestion chamber 230 are increased, thereby more timely discharging the waste liquid generated during the implantation ventilation process from the patient's body.

[0039] In one embodiment, two grooves 270 are provided, and the two grooves 270 are respectively provided on the outer wall of the first sub-chamber 231 and the outer wall of the second sub-chamber 232, so as to enhance the limiting effect and further prevent the laryngeal mask from moving randomly after implantation.

[0040] In one embodiment, the two grooves 270 are arranged in an eight-shaped pattern, thereby limiting the mask body 200 on both the left and right sides of the mask body 200 at the same time, so that the laryngeal mask can be better maintained stable during implantation and ventilation.

[0041] In the above embodiment, the edge of the groove 270 and the rear surface are smoothly transitioned, so that the groove 270 can play a limiting role without causing damage to the tissue of the patient's throat.

[0042] Reference Figure 4 and Figure 5In one embodiment, the mask body 200 also has a front side facing the respiratory tract, the breathing port 220 is arranged on the front side, the rear side of the laryngeal mask is arched, and a boss 211 is arranged in the breathing chamber 210, and the boss 211 has an inclined surface facing the breathing chamber 110 and the breathing port 220, so that when the laryngeal mask is implanted in the patient's throat, the mask body 200 is deformed under the squeezing force of the throat, and the end of the mask body 200 that is first inserted into the throat is moved closer to the inner concave part of the arch, so that the shape of the breathing port 220 changes, and at the same time drives the boss 211 to move closer to the plane where the breathing port 220 is located, so that the mask body 200 is more closely fitted to the respiratory opening, reducing the dead air space, and facilitating the circulation of fresh air; and the setting of the boss 211 makes it possible for the operator to insert the inspection device into the respiratory tract through the breathing chamber 210 during the implantation and ventilation process, and the inclined surface of the boss 211 can guide the inspection device, so that the inspection device can be inserted into the respiratory tract more accurately, and the probability of the inspection device poking the respiratory tract wall is reduced.

[0043] In one embodiment, the boss 211 and the side wall of the breathing chamber 210 have a smooth transition, so that the boss 211 can guide the inserted inspection device while the inspection device can pass through the connection between the boss 211 and the side wall of the breathing cavity 110 more smoothly, thereby making the inspection device insertion smoother.

[0044] In one embodiment, a chamfer is provided on one side edge of the boss 211 away from the respiratory cavity 110. When the boss 211 approaches the plane where the respiratory port 220 is located under the drive of the deformed mask body 200, the boss 211 may contact the larynx. The chamfer provided on the edge of the boss 211 reduces the stimulation of the larynx by the boss 211 when the boss 211 contacts the larynx, thereby reducing the discomfort caused to the patient by the three-chamber flushable fish-mouth laryngeal mask airway tube.

[0045] In one embodiment, a limiting groove 212 extending from the respiratory cavity 110 to the respiratory port 220 is provided on the boss 211. When the inspection device is inserted from the respiratory cavity 110, the limiting groove 212 can guide and limit the inspection device, so that the inspection device can be inserted into the required position more accurately, and the inspection device is not easy to move at will after insertion, thereby making the implantation ventilation process smoother.

[0046] In one embodiment, a plurality of limiting grooves 212 are arranged at intervals on the boss 211, so that there are more options for the position where the inspection device is inserted, so that the operator can select different limiting grooves 212 according to actual needs.

[0047] In one embodiment, the cross-section of the limiting groove 212 is arc-shaped. Since the inspection device usually includes a cylindrical tubular structure, the limiting groove 212 with an arc-shaped cross-section can fit the inspection device better, so that the limiting groove 212 has a better guiding and limiting effect on the inspection device.

[0048] Reference Figure 1 and Figure 2 In one embodiment of the present invention, the laryngeal mask comprises a tube body 100 and a mask body 200, the tube body 100 has a tube connecting end 101, the mask body 200 has a mask connecting end 201, the mask connecting end 201 is sealed and connected to the tube connecting end 101, the tube body 100 is provided with a breathing cavity 110, the mask body 200 is provided with a breathing chamber 210 and a breathing port 220, the breathing cavity 110 is used for breathing gas circulation, the breathing chamber 210 is connected with the breathing cavity 110, the breathing port 220 is used for the breathing chamber 210 to communicate with the respiratory tract, and the mask body 200 is provided with a guide ridge 260, the guide ridge 260 extends along the length direction of the laryngeal mask and protrudes from the surface of the mask body 200. When the laryngeal mask is implanted in the patient's larynx, the breathing chamber 210 is connected to the patient's respiratory tract through the breathing port 220, and the breathing gas enters the breathing chamber 210 through the breathing cavity 110, and then enters the patient's respiratory tract through the breathing port 220, thereby ensuring that the patient can breathe normally when the laryngeal mask is implanted in the patient's larynx.

[0049] The technical solution of the present invention adopts a method of providing a breathing cavity 110 for breathing gas to circulate on the tube body 100, providing a breathing chamber 210 connected to the breathing cavity 110 on the mask body 200, and providing a breathing port 220 on the mask body 200. When the laryngeal mask is implanted in the patient's throat, the breathing port 220 is used to connect the breathing chamber 210 with the patient's respiratory tract, and a guide ridge 260 extending along the length direction of the laryngeal mask is provided on the mask body 200, and the guide ridge 260 protrudes from the surface of the mask body 200, so that during the process of implanting the laryngeal mask into the patient's throat, the guide ridge 260 protruding from the surface of the mask body 200 and the laryngeal tissue are squeezed against each other, and the guide ridge 260 and the squeezed and depressed laryngeal tissue form a guide structure, and the extension direction of the guide structure is the same as the initial implantation direction of the laryngeal mask, thereby solving the problem that the laryngeal mask is easily deviated from the initial implantation direction during implantation, and the implantation direction needs to be adjusted in time during the implantation process, resulting in inconvenience in the implantation process.

[0050] It can be understood that in the above embodiment, the mask body 200 is connected to the tube body 100, and the direction in which the mask body 200 is connected to the tube body 100 is the length direction of the laryngeal mask. In addition, the specific implementation form of the guide ridge 260 includes providing a raised portion higher than the surface of the laryngeal mask on the surface of the laryngeal mask, the middle part of the raised portion is the highest, and the two sides gradually decrease to be flush with the rear surface of the laryngeal mask, thereby guiding the ridge 260.

[0051] In one embodiment, the laryngeal mask has a front side and a rear side relative to each other, the breathing port 220 is arranged on the front side, and the guide ridge 260 is arranged on the rear side. When the laryngeal mask is implanted in the patient's larynx, the breathing port 220 located on the front side is connected to the patient's respiratory tract. Therefore, in order to ensure the sealing effect between the laryngeal mask and the patient's larynx, the front side needs to be in sealing contact with the tissue of the patient's larynx as much as possible. In this embodiment, the guide ridge 260 is arranged on the rear side. While the guide ridge 260 is used to guide during the implantation process, the guide ridge 260 is prevented from affecting the sealing effect between the mask body 200 and the patient's larynx, so that after the laryngeal mask is implanted, the front side of the mask body 200 can be better sealed with the patient's larynx, ensuring that the patient can smoothly obtain breathing gas.

[0052] In one embodiment, the guide ridge 260 is provided at the connection between the tube body 100 and the mask body 200. Due to the different structures of the mask body 200 and the tube body 100, during the process of implanting the laryngeal mask into the patient's larynx, the connection between the mask body 200 and the tube body 100 is more likely to be squeezed and deformed, thereby more likely to cause the implantation direction to deviate during the implantation process, and the guide ridge 260 is provided at the connection between the tube body 100 and the mask body 200, which can better play a guiding role during the implantation process. In addition, the guide ridge 260 also plays a role in enhancing the structural strength of the connection between the mask body 200 and the tube body 100, so that during the implantation of the laryngeal mask, the connection between the mask body 200 and the tube body 100 is not easy to bend, avoiding bending and causing the passage at the connection between the mask body 200 and the tube body 100 to be blocked, thereby keeping the respiratory cavity 110 and the respiratory chamber 210 connected.

[0053] In one embodiment, one end of the guide ridge 260 extends to the cover connection end 201, and the other end extends to the tube connection end 101, that is, the two ends of the guide ridge 260 extend toward the cover body 200 and the tube body 100 respectively, so that the guide ridge 260 transitions with the cover body 200 and the tube body 100, thereby better playing a guiding role during the implantation process.

[0054] In one embodiment, the rear surface of the laryngeal mask has a relative left and right side, and the guide ridge 260 is arranged between the left and right sides, that is, the guide ridge 260 is arranged in the middle part or close to the middle part in the left and right directions of the laryngeal mask, so as to play a guiding role more smoothly during the implantation process.

[0055] In one embodiment, the guide ridge 260 is provided with a rounded corner in the middle portion in the left-right direction, so as to prevent the guide ridge 260 from damaging the tissue of the patient's larynx during the implantation process.

[0056] In one embodiment, the guide ridge 260, the tube body 100 and the cover body 200 are integrally formed. The integrally formed processing method is simple and convenient, and the joints of the guide ridge 260, the tube body 100 and the cover body 200 are smooth to avoid scratching the patient's throat.

[0057] In one embodiment, the laryngeal mask is arranged in an arcuate shape in its length direction to adapt to the shape of the larynx, thereby making it easier to implant the laryngeal mask.

[0058] In one embodiment, the rear surface of the laryngeal mask is arranged as an outwardly convex curved surface. By arranging the rear surface of the laryngeal mask as an outwardly convex curved surface, the process of the laryngeal mask entering the larynx is made smoother.

[0059] In the above embodiment, the smooth transition between the guide ridge 260 and the rear surface of the mask body 200 and between the guide ridge 260 and the rear surface of the tube body 100 makes the laryngeal mask implantation process smoother and less likely to cause damage to the patient's larynx.

[0060] The above descriptions are only optional embodiments of the present invention, and are not intended to limit the patent scope of the present invention. All equivalent structural changes made using the contents of the present invention's specification and drawings, or directly / indirectly applied in other related technical fields, are included in the patent protection scope of the present invention.

Claims

1. A laryngeal mask, characterized in that: include: a tube body having a tube connection end; and, A mask body having a mask connection end, the mask connection end being sealedly connected to the tube connection end, the tube body being used for allowing respiratory gas to enter the patient's respiratory tract through the mask body, and for allowing waste liquid generated during implant ventilation to be discharged through the mask body; The mask body is provided with a limiting portion for limiting the movement of the mask body in the larynx after being implanted in the larynx of the patient; The mask body has a rear side facing away from the respiratory tract; the limiting portion is a groove that is concave relative to the surface of the rear side; the groove is in the shape of a long strip; The mask body is provided with a guide ridge extending along the length direction of the laryngeal mask, and the guide ridge protrudes from the surface of the mask body, so that during the process of implanting the laryngeal mask into the patient's larynx, the guide ridge and the laryngeal tissue are squeezed against each other, and the guide ridge and the squeezed and depressed laryngeal tissue form a guide structure, and the extension direction of the guide structure is the same as the direction in which the laryngeal mask is initially implanted; The laryngeal mask has a front side and a rear side opposite to each other, the guide ridge is arranged on the rear side, and the guide ridge is arranged at the connection between the tube body and the mask body.

2. The laryngeal mask according to claim 1, characterized in that The limiting portion is arranged on the surface of the rear side.

3. The laryngeal mask according to claim 2, characterized in that The cover body also has a cover implantation end opposite to the cover connection end, and the groove is in the shape of an elongated strip and extends from the cover connection end to the cover implantation end.

4. The laryngeal mask according to claim 2, characterized in that The tube body has a digestive cavity, and the cover body has a digestive chamber communicated with the digestive cavity; The digestion chamber comprises a first sub-chamber and a second sub-chamber, and a communication passage is provided between the first sub-chamber and the second sub-chamber; a circulation port is provided on the rear side wall of the digestion chamber for waste liquid generated during implantation ventilation to enter the digestion chamber; The digestive cavity includes a first sub-cavity and a second sub-cavity, the first sub-cavity is connected to the first sub-chamber, and the second sub-cavity is connected to the second sub-chamber. The first sub-cavity is used to allow cleaning materials to enter the digestive cavity, so as to flush the waste liquid generated during the implantation ventilation process into the second sub-cavity through the connecting channel and discharge it out of the patient's body.

5. The laryngeal mask according to claim 4, characterized in that The groove is arranged beside the circulation port.

6. The laryngeal mask according to claim 5, characterized in that The circulation port includes a first sub-port and a second sub-port, wherein the first sub-port is arranged in the first sub-chamber, and the second sub-port is arranged in the second sub-chamber.

7. The laryngeal mask according to claim 6, characterized in that There are two grooves, which are respectively arranged on the outer side wall of the first sub-chamber and the outer side wall of the second sub-chamber.

8. The laryngeal mask according to claim 7, characterized in that The two grooves are arranged in an eight-shaped pattern.

9. The laryngeal mask according to any one of claims 1 to 8, characterized in that The edge of the groove smoothly transitions to the surface of the rear side.

Images