laryngeal mask

Abstract

Embodiments of the present application provide a laryngeal mask. The laryngeal mask is formed with an endoscope channel and a ventilation channel, and comprises a catheter, a sealing seat and one or more functional members. The catheter has a central cavity which forms at least part of the structure of the endoscope channel. The sealing seat is arranged at the distal end of the catheter, and the ventral side of the sealing seat forms a mask cavity which forms part of the ventilation channel. The central cavity comprises a proximal cavity section, and the cavity wall of the proximal cavity section forms one or more first grooves which extend along the extension direction of the catheter and are open towards the central cavity. At least part of the structure of the at least one functional member is arranged in the first groove. The laryngeal mask of the embodiments of the present application can reduce the occupation of the radial space of the laryngeal mask by the functional member channel while achieving the normal ventilation function of the laryngeal mask and the passability of the endoscope and / or surgical instruments, and can reduce the production and assembly difficulty.

Description

Technical Field

[0001] Embodiments of this application relate to the field of medical device technology, and more particularly to a laryngeal mask. Background Technology

[0002] In clinical practice, it is often necessary to insert endoscopes and / or surgical instruments into the patient's upper gastrointestinal tract for diagnosis and treatment. During this process, local or general anesthesia is usually administered to the patient, which carries the risk of obstructing the patient's breathing.

[0003] To address this, the technology provides an endoscopic laryngeal mask airway, which adds a cavity for the entry of endoscopes and / or surgical instruments to the traditional laryngeal mask airway, thereby enabling ventilation of the patient's lungs during endoscopic procedures.

[0004] Furthermore, endoscopic laryngeal masks usually require additional functional components to meet practical usage needs. These components may include, but are not limited to, a visual device for enabling the visualization function of the laryngeal mask, a light guide for providing illumination to the visual device, and a suction / rinsing tube for enabling the suction / rinsing function of the laryngeal mask.

[0005] Because gastrointestinal endoscopes typically have a large radial cross-sectional dimension, the endoscopic passage within the laryngeal mask airway (LMA) must also maintain a large radial cross-sectional dimension. However, patients have relatively limited mouth opening, necessitating strict limitations on the LMA's radial cross-sectional dimension. The design challenge lies in achieving basic ventilation functionality within the limited radial cross-sectional space of the LMA, while simultaneously ensuring the passage of endoscopes and / or surgical instruments, and facilitating the assembly of other functional components. Summary of the Invention

[0006] In view of this, embodiments of this application aim to provide a laryngeal mask that can solve or at least partially solve the above-mentioned problems.

[0007] This application provides a laryngeal mask airway (LMA) having an endoscope channel and a ventilation channel. The LMA includes: a catheter having a central cavity that forms at least a portion of the structure of the endoscope channel; a sealing seat disposed at the distal end of the catheter, the ventral side of the sealing seat forming a mask cavity that forms part of the ventilation channel; and one or more functional components, wherein the central cavity includes a proximal segment, the wall of the proximal segment forming one or more first grooves extending along the extension direction of the catheter and opening toward the central cavity, and at least a portion of the structure of at least one of the functional components is disposed in the first groove.

[0008] In some embodiments, the functional component includes a suction / rinsing tube, and / or a light guide, and / or a viewing element; at least a portion of the suction / rinsing tube, and / or the light guide, and / or the viewing element is disposed in the first groove and extends into the cover cavity.

[0009] In some embodiments, the laryngeal mask includes a connector comprising a connecting platform and an insertion portion connected to the connecting platform, the insertion portion being inserted into the proximal cavity segment, the insertion portion having a core cavity communicating with the central cavity, the core cavity extending through the insertion portion along the extension direction of the catheter; a portion of the outer peripheral surface of the insertion portion covers the opening of the first groove.

[0010] In some embodiments, the laryngeal mask forms a viewing channel, the central cavity is isolated from the viewing channel, and in the radial section of the proximal cavity segment, the central cavity is circular or nearly circular, and the viewing channel is circular or nearly circular. The line connecting the geometric center of the central cavity and the geometric center of the viewing channel is used as a reference line, and the shortest distance from any point on the first groove to the reference line is less than the shortest radius of the central cavity.

[0011] In some embodiments, the central lumen includes a distal lumen connected to the proximal lumen segment, the lumen wall of the distal lumen segment forming one or more second grooves extending along the extension direction of the catheter, each second groove communicating with a corresponding first groove, and a portion of the functional component being disposed in the second groove.

[0012] In some embodiments, the central axis of the second groove is substantially parallel to the central axis of the central cavity.

[0013] In some embodiments, the second groove is open toward the outer surface of the cavity wall of the distal cavity segment, and the cavity wall of the central cavity is formed with at least one through hole, the through hole penetrating the cavity wall of the central cavity, and the through hole connecting the first groove and the corresponding second groove.

[0014] In some embodiments, the radial cross-sectional area of ​​the through hole is not greater than the radial cross-sectional area of ​​the first groove.

[0015] In some embodiments, the central axis of the through hole and the central axis of the second groove are respectively substantially parallel to the central axis of the distal cavity segment; or, the central axis of the through hole and the central axis of the second groove are extensions of each other, and the line formed by the central axis of the through hole and the central axis of the second groove is substantially parallel to the central axis of the distal cavity segment.

[0016] In some embodiments, the laryngeal mask further includes a viewing device, the functional component including a viewing element, the viewing element being a viewing tube, the laryngeal mask forming a viewing channel, at least a portion of the viewing tube being disposed within the viewing channel, the central cavity being isolated from the viewing channel, in the radial cross-section of the proximal cavity segment, the central cavity being circular or nearly circular, the viewing channel being circular or nearly circular, with the line connecting the geometric center of the central cavity and the geometric center of the viewing channel as a reference line, the shortest distance from any point on the first groove to the reference line being less than the shortest radius of the central cavity.

[0017] In some embodiments, on the radial cross-section of the proximal cavity segment, any point on the first groove is located outside the reference line; and / or a perpendicular line is drawn from any point on the first groove to the reference line, the intersection of the perpendicular line and the reference line being located between the geometric center of the central cavity and the geometric center of the viewing channel.

[0018] In some embodiments, the outer surface of the catheter is recessed inward to form a limiting groove, the limiting groove extending from the proximal end of the catheter to the distal end of the catheter, the laryngeal mask includes a viewing channel tube, the space within the viewing channel tube being formed as at least a portion of the viewing channel, and a portion of the viewing channel tube being located within the limiting groove.

[0019] In some embodiments, the central lumen includes a distal lumen connected to the proximal lumen segment, the lumen wall of the distal lumen segment forming one or more second grooves extending along the catheter extension direction, the openings of the second grooves communicating with the limiting groove.

[0020] In some embodiments, in the radial section of the distal cavity segment, the second groove includes a first portion and a second portion that are interconnected, the second portion connecting the first portion and the limiting groove, wherein the first portion is circular or near-circular.

[0021] In some embodiments, the catheter includes two flanges, the outer surface of the wall of the distal segment has a recessed mating surface, the two flanges are located on opposite sides of the recessed mating surface in the peripheral direction of the catheter and are spaced apart, the two flanges extend from the proximal end to the distal end of the wall of the distal segment, the ends of the two flanges facing each other are spaced apart and define the limiting groove with the recessed mating surface; the inner surface of the flange facing the recessed mating surface is spaced apart from the recessed mating surface and defines the second groove.

[0022] In some embodiments, in the radial section of the distal cavity, the outer surface of the conduit on the side near the visual channel tube has a first arc, and the outer surfaces of the two flanges are located on the first arc.

[0023] In some embodiments, the catheter has an air guide cavity located on one side of the central cavity, the air guide cavity forming at least a portion of the ventilation channel structure.

[0024] In some embodiments, the laryngeal mask includes at least one support that protrudes from the inner surface of the cavity wall of the air delivery chamber and extends along the extension direction of the duct.

[0025] In some embodiments, at least one of the supports protrudes from the inner surface of the air guide cavity on one side along the first direction, the first direction being the distribution direction of the air passage and the endoscope passage.

[0026] In some embodiments, at least one of the supports protrudes from one inner surface of the air guide cavity along the first direction and is spaced apart from the other inner surface of the air guide cavity along the first direction.

[0027] In some embodiments, the catheter has a first arc-shaped wall and a second arc-shaped wall disposed opposite to each other along a first direction, the first direction being the distribution direction of the ventilation channel and the endoscope channel. The first arc-shaped wall and the second arc-shaped wall surround and form at least a portion of the air-guiding cavity. The first arc-shaped wall is located on the side of the second arc-shaped wall away from the central cavity. Both the circumferential ends of the first arc-shaped wall and the circumferential ends of the second arc-shaped wall are curved toward the central cavity, and the curvature of the first arc-shaped wall is greater than the curvature of the second arc-shaped wall. The support body is disposed on the surface of at least one of the first arc-shaped wall and the second arc-shaped wall facing the other.

[0028] In some embodiments, the laryngeal mask includes a connector, the connector including a connecting platform and a plug portion connected to the connecting platform, the plug portion having an air chamber communicating with the air delivery chamber and the air chamber being formed as part of the air passage, a portion of the cavity wall of the air chamber being inserted into the proximal end of the air delivery chamber.

[0029] In some embodiments, the connection platform has a vent connector, the vent connector forming a connector cavity, the connector cavity, the vent cavity and the air guide cavity being sequentially connected to form at least a portion of the venting channel.

[0030] In some embodiments, the connector has a core cavity communicating with the central cavity, the central axis of the connector cavity is coplanar with the central axis of the core cavity, and the central axis of the connector cavity intersects with the central axis of the core cavity.

[0031] In some embodiments, the functional component includes a suction / rinsing tube, the proximal end of which is provided with an external device interface and a cover, the cover being used to open or close the lumen of the suction / rinsing tube.

[0032] In some embodiments, the suction / rinsing tube extends into the cavity of the cover, and its distal end is fixed relative to the sealing seat. The suction / rinsing tube has at least one opening at its end and / or on its distal sidewall.

[0033] In some embodiments, an extension cavity is formed within the sealing seat, and the end and / or distal sidewall of the extension cavity has at least one opening. The extension cavity communicates with the cover cavity through the opening, and the proximal end of the extension cavity is sealed to the distal end of the suction / rinsing tube, thereby enabling the extension cavity to communicate with the suction / rinsing tube.

[0034] In some embodiments, the functional component includes a suction / rinsing tube, the distal end of which is connected to the channel wall at the distal end of the video channel, or the distal end of which is fixed relative to the sealing seat.

[0035] In some embodiments, the functional component includes a light guide, the distal end of which is connected to the channel wall at the distal end of the video channel, or the distal end of which is fixed relative to the sealing seat.

[0036] In some embodiments, the laryngeal mask includes a flexible tube, the channel wall at the distal end of the viewing channel is formed by the flexible tube, the distal end face of the flexible tube is formed as a light-transmitting blind end, and the flexible tube can bend and reset synchronously with the viewing tube when the viewing tube is bent and reset in a controlled manner. The functional component includes a suction / rinsing tube and / or a light guide, the distal end of the suction / rinsing tube and / or the distal end of the light guide is connected to the flexible tube.

[0037] In some embodiments, the cavity wall of the cover cavity protrudes to form a baffle, the baffle is located on the distal side of the hose and spaced apart from the hose, and when the hose is in the reset state, in the orthographic projection along the extension direction of the hose, the projection of the baffle and the projection of the blind end partially overlap along a first direction, or the distance between the projection of the baffle and the projection of the blind end along the first direction does not exceed 10 mm, the first direction being the distribution direction of the ventilation channel and the endoscope channel.

[0038] In some embodiments, the cavity has a bottom wall and a first side wall and a second side wall disposed opposite to each other along the first direction. The first side wall and the second side wall are connected to the bottom wall. The first side wall is disposed adjacent to the hose. The baffle is disposed on the first side wall. The baffle includes a first end and a second end disposed opposite to each other. The first end is connected to the bottom wall.

[0039] In some embodiments, the baffle has a flow-guiding slope disposed away from the hose, and the flow-guiding slope is inclined toward the side where the hose is located along a direction from one end away from the first sidewall to one end near the first sidewall.

[0040] In some embodiments, the end face of the second end is flush with or lower than the ventral end face of the sealing seat.

[0041] In some embodiments, at least a portion of the conduit is pre-bent.

[0042] In some embodiments, the laryngeal mask includes a connector, the connector including a connecting platform and an insertion portion connected to the connecting platform, the insertion portion being inserted into the proximal cavity segment, the hardness of the insertion portion being greater than the hardness of the catheter, and the hardness of the catheter being greater than the hardness of the sealing seat.

[0043] In some embodiments, the insertion portion has a core cavity communicating with the central cavity, the core cavity extending through the back side of the sealing seat of the insertion portion along the extension direction of the catheter to form a sealing seat cavity, the ventral side of the sealing seat cavity being closed and the back side being at least partially open, the core cavity, the central cavity and the sealing seat cavity being sequentially connected to form the endoscope channel.

[0044] The laryngeal mask in this embodiment of the application, while achieving normal ventilation function and accessibility of endoscopes and / or surgical instruments, can reduce the occupation of the radial space of the laryngeal mask by the functional component by providing a first groove to accommodate at least a portion of the structure of at least one functional component, thereby reducing the difficulty of production, processing and assembly. Attached Figure Description

[0045] Figure 1 This is a schematic diagram of a laryngeal mask according to an embodiment of this application;

[0046] Figure 2 This is a schematic diagram of the laryngeal mask according to another perspective of an embodiment of this application;

[0047] Figure 3 This is a schematic diagram of the laryngeal mask according to another perspective of an embodiment of this application;

[0048] Figure 4 This is a schematic diagram of the sealing seat structure according to an embodiment of this application;

[0049] Figure 5 for Figure 1 A schematic diagram of the dorsal cross-section of the central laryngeal mask;

[0050] Figure 6 for Figure 1 A schematic diagram of the AA cross-section of the central laryngeal mask;

[0051] Figure 7 for Figure 1 Schematic diagram of the BB cross-section of the central laryngeal mask;

[0052] Figure 8 for Figure 7 An enlarged schematic diagram of section C;

[0053] Figure 9 This is an exploded view of the laryngeal mask according to another embodiment of this application;

[0054] Figure 10 This is a schematic diagram of the laryngeal mask according to another embodiment of this application;

[0055] Figure 11 for Figure 10 Schematic diagram of the DD cross-section of the central laryngeal mask;

[0056] Figure 12 This is a schematic diagram of a sealing seat structure according to another embodiment of this application;

[0057] Figure 13 for Figure 12 A structural schematic diagram of the middle sealing seat from another perspective.

[0058] Explanation of reference numerals in the attached figures

[0059] 100. Laryngeal mask; 100a. Endoscopic channel; 100b. Ventilation channel; 100c. Visual channel; 1. Tube; 11. Central cavity; 11a. Proximal cavity segment; 11b. Distal cavity segment; 12. First groove; 13. Second groove; 13a. First part; 13b. Second part; 14. Limiting groove; 15. Flanged edge; 16. Recessed mating surface; 17. Air delivery cavity; 171. First arc-shaped wall; 172. Second arc-shaped wall; 2. Sealing seat; 2a. Mask cavity; 2b. Sealing seat cavity; 21. Rib; 21a. First end; 21b. Second end; 2 1c. Guide slope; 22. Bottom wall; 23. First side wall; 24. Second side wall; 3. Functional component; 31. Light guide; 32. Suction / rinsing tube; 321. Cover; 33. Vision component; 4. Vision channel tube; 5. Connector; 51. Connecting platform; 511. Ventilation connector; 511a. Connector cavity; 512. T-shaped insert; 52. Insertion part; 52a. Core cavity; 52b. Ventilation cavity; 521. Protruding rib; 522. Arc-shaped insert; 53. Protective sleeve; 6. Hose; 6a. Blind end; 7. Fixing strap; 7a. Insertion hole; 8. Support body. Detailed Implementation

[0060] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0061] The specific technical features described in the specific embodiments can be combined in any suitable manner without contradiction. For example, different combinations of specific technical features can form different embodiments and technical solutions. To avoid unnecessary repetition, the various possible combinations of the specific technical features in this invention will not be described separately.

[0062] In the following description, the terms "first," "second," etc., are used merely to distinguish different objects and do not indicate that the objects have the sameness or relationship. It should be understood that the directional descriptions "above," "below," "outside," "inside," "left," and "right" all refer to the directions shown in the specific corresponding diagrams, which may or may not be the left and right directions in normal use.

[0063] It should be noted that the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element. "A plurality of" means two or more.

[0064] In this embodiment, "proximal end" refers to the direction closer to the operator, "distal end" refers to the direction away from the operator, "ventral side" refers to the side facing the glottic opening after the laryngeal mask is correctly placed in the patient's pharynx, "dorsal side" refers to the side away from the glottic opening after the laryngeal mask is correctly placed in the patient's pharynx, and "extension direction of the catheter" refers to the extension direction of the central axis of the catheter. The extension direction of the laryngeal mask as a whole, the extension direction of the endoscope channel, the ventilation channel, and the extension direction of the sealing seat are all roughly parallel to or coincide with the extension direction of the catheter.

[0065] An embodiment of this application provides a laryngeal mask, referring to... Figures 1-5 The laryngeal mask 100 has an endoscope channel 100a and a ventilation channel 100b.

[0066] The endoscope channel 100a is used for the passage of endoscopes and / or surgical instruments, and the endoscopes here may include, but are not limited to, gastroscopes, duodenoscopes, etc.

[0067] The ventilation channel 100b is used to introduce air into the patient's lungs, thereby enabling the laryngeal mask 100 to provide ventilation. As an example, the ventilation channel 100b is adjacent to and isolated from the endoscopy channel 100a, thereby allowing normal ventilation to be maintained while performing upper gastrointestinal diagnosis or treatment on the patient.

[0068] It should be noted that, in addition to the aforementioned channels, the laryngeal mask 100 can also form other functional channels, which can be specifically configured according to actual usage requirements by those skilled in the art.

[0069] The laryngeal mask 100 specifically includes a catheter 1, a sealing seat 2, and one or more functional components 3.

[0070] The catheter 1 can be a single tubular structure or a structure formed by multiple tubular bodies; there is no limitation on this. At least a portion of the structures of the aforementioned endoscope channel 100a and ventilation channel 100b can be formed by the catheter 1.

[0071] For ease of description, the distribution direction of the endoscope channel 100a and the ventilation channel 100b is defined as the first direction in this application. Here, the distribution direction of the endoscope channel 100a and the ventilation channel 100b specifically refers to the direction of the line connecting the geometric midpoint of the endoscope channel 100a and the geometric midpoint of the ventilation channel 100b in the radial section of the catheter 1 when the laryngeal mask 100 is in its natural state.

[0072] Specifically, the catheter 1 has a central lumen 11, which at least forms a portion of the structure of the endoscope channel 100a. As an example, the central lumen 11 may be located approximately at the center of the radial section of the laryngeal mask airway 100. For instance, the geometric center of the central lumen 11 and the geometric center of the laryngeal mask airway 100 may approximately coincide in the radial section of the laryngeal mask airway 100, for example, the distance between the geometric center of the central lumen 11 and the geometric center of the laryngeal mask airway 100 may not exceed 1 mm, 3 mm, 5 mm, 8 mm, 10 mm, etc. The advantage of using the central lumen 11 of the catheter 1 to form the endoscope channel 100a is that, after the laryngeal mask airway 100 is inserted, the distal end of the endoscope channel 100a will be substantially aligned with the patient's digestive tract, facilitating the insertion of the endoscope.

[0073] The central lumen 11 can extend from the proximal end of the catheter 1 to the distal end of the catheter 1 along the extension direction of the catheter 1, or it can extend from a section of the catheter 1 near the proximal end to the distal end of the catheter 1, without limitation.

[0074] The catheter 1 may also form other functional cavities, which are used to correspond to at least a portion of the structure forming the ventilation channel 100b and the other functional channels of the laryngeal mask 100.

[0075] In some embodiments, refer to Figure 5 The catheter 1 may also have a first arc-shaped wall 171 and a second arc-shaped wall 172 arranged opposite to each other. The first arc-shaped wall 171 is located on the side of the second arc-shaped wall 172 away from the endoscope channel 100a. Both circumferential ends of the first arc-shaped wall 171 and both circumferential ends of the second arc-shaped wall 172 are curved toward the endoscope channel 100a. The curvature of the first arc-shaped wall 171 is greater than the curvature of the second arc-shaped wall 172. The first arc-shaped wall 171 and the second arc-shaped wall 172 surround and form an air guide cavity 17. The air guide cavity 17 forms at least a part of the structure of the ventilation channel 100b.

[0076] Alternatively, in some other embodiments, the laryngeal mask 100 may include an airway (not shown) arranged side-by-side with the duct 1, the lumen of which at least forms part of the structure of the airway 100b.

[0077] In some embodiments, at least a portion of the catheter 1 may be pre-bent to facilitate the physiological curvature of the laryngeal mask 100 through the patient's upper airway from the oral cavity to the pharynx. As an example, a portion of the distal end of the catheter 1 may be pre-bent, or the entire catheter 1 may be pre-bent.

[0078] The sealing seat 2 is located at the distal end of the catheter 1. The sealing seat 2 may include an airbag seat and an airbag, or it may be a non-airbag structure, such as a soft structure made of silicone or silicone, without limitation. In actual use, the sealing seat 2 can be placed over the area around the patient's laryngeal inlet to isolate the patient's respiratory and digestive tracts.

[0079] The ventral side of the sealing seat 2 forms a mask cavity 2a. Specifically, the ventral side of the sealing seat 2 refers to the side facing the glottic opening of the patient after the laryngeal mask 100 is correctly inserted into the patient's pharynx. Correspondingly, the dorsal side of the sealing seat 2, which will be mentioned below, refers to the side away from the glottic opening of the patient after the laryngeal mask 100 is correctly inserted into the patient's pharynx.

[0080] Taking the sealing seat 2, which includes an airbag seat and an airbag, as an example, the airbag is located on the ventral side of the airbag seat, and the cover cavity 2a is formed by the airbag and the airbag seat.

[0081] The hood cavity 2a is formed as part of the ventilation channel 100b. As an example, the space of the hood cavity 2a can be connected to the space of the air guide cavity 17 or the space of the lumen of the air pipe, thereby forming part of the ventilation channel 100b.

[0082] In some embodiments, a sealing cavity 2b may be formed on the dorsal side of the sealing seat 2. The ventral side of the sealing cavity 2b is closed, and the dorsal side is at least partially open. The central cavity 11 communicates with the sealing cavity 2b, and the sealing cavity 2b is formed as part of the endoscope channel 100a. As an example, the sealing cavity 2b may be a structure formed by the dorsal sidewall of the sealing seat 2 bulging towards the ventral side. In practical applications, the endoscope and / or surgical instruments can pass sequentially through the central cavity 11 and the sealing cavity 2b, and enter the digestive tract through the open section on the dorsal side of the sealing cavity 2b. The sealing cavity 2b makes full use of the dorsal space of the sealing seat 2 and guides the passage of the endoscope and / or surgical instruments. The open design on the dorsal side of the sealing cavity 2b facilitates the passage of the endoscope and / or surgical instruments through the sealing cavity 2b, reducing the frictional resistance between the inner wall of the sealing cavity 2b and the endoscope and / or surgical instruments. In some other embodiments, the distal end of the central lumen 11 is open, allowing endoscopes and / or surgical instruments to directly enter the digestive tract through the distal end of the central lumen 11.

[0083] The laryngeal mask 100 also includes one or more functional components 3, which may include, but are not limited to, a viewing device for realizing the viewing function of the laryngeal mask 100, a light guide 31 for providing illumination to the viewing device, and a suction / rinsing tube 32 for realizing the suction / rinsing function of the laryngeal mask 100.

[0084] It is understandable that the endoscope channel 100a can accommodate various endoscopes, including gastroscopes and duodenoscopes, and / or large surgical instruments. Gastroscopes and duodenoscopes generally have a large radial dimension, some even reaching or exceeding 14 mm. Therefore, the endoscope channel 100a needs to have a large radial dimension to ensure smooth entry and exit of endoscopes or instruments. In addition, the laryngeal mask airway 100 includes not only the endoscope channel 100a but also the ventilation channel 100b. Therefore, the radial dimension of the laryngeal mask airway 100 must also be enlarged.

[0085] In some embodiments, this is mainly reflected in the fact that the conduit 1 needs to have a particularly large radial dimension.

[0086] After the laryngeal mask airway 100 is inserted into the patient, its proximal segment is mostly fixed inside the patient's mouth, while the patient's mouth opening is limited. Furthermore, the proximal segment of the laryngeal mask airway 100 is typically designed with reinforcement, including but not limited to inserting rigid materials into the proximal segment to prevent collapse of the channels due to the patient's teeth occlusion. Therefore, the design of the functional component 3 should, as far as possible, not increase the size of the proximal segment of the laryngeal mask airway 100; at the same time, the functional component 3 should, as far as possible, not be exposed outside the proximal segment of the laryngeal mask airway 100, to reduce friction between the functional component 3 and the patient's teeth and to minimize potential additional pressure on the patient's oral tissues.

[0087] Therefore, it is necessary to provide a functional component channel (here, the functional component channel refers to the channel for accommodating at least a portion of the structure of the functional component 3) in at least the proximal segment of the laryngeal mask 100 to save the radial cross-sectional dimensions of the laryngeal mask 100, so as to accommodate at least a portion of the functional component 3.

[0088] Furthermore, as mentioned above, due to the limited radial cross-sectional space of the laryngeal mask 100, the radial dimension of the functional component channel must be kept relatively small. In fact, the radial cross-sectional dimension of the functional component 3 is indeed generally small as well. Therefore, based on the above necessity and possibility, it is reasonable to keep the radial cross-sectional dimension of the functional component channel relatively small.

[0089] If the functional component channel is formed by an independent cavity within the laryngeal mask 100, this independent cavity typically has a continuous cavity wall or tube wall in the radial direction. This continuous radial cavity wall undoubtedly occupies space; furthermore, the manufacturing of this cavity presents challenges. If a pre-cast tube with a cavity wall is used to house the functional component 3, the occupancy of this pre-cast tube in the radial space of the laryngeal mask 100 will be particularly significant, thus undoubtedly increasing the radial dimension of the laryngeal mask 100. Therefore, for the laryngeal mask 100, where the radial space is very limited, the above method is clearly not the optimal choice.

[0090] In response to the above problems, refer to Figure 6 In this embodiment, the central lumen 11 includes a proximal lumen segment 11a. Specifically, the proximal lumen segment 11a refers to a portion of the central lumen 11 extending from the proximal end of the catheter 1. For example, the central lumen 11 includes the proximal lumen segment 11a and a distal lumen segment 11b connected to the proximal lumen segment 11a. The proximal lumen segment 11a is approximately the lumen segment of the central lumen 11 corresponding to the proximal segment of the catheter 1 in its extension direction, and the distal lumen segment 11b is approximately the lumen segment of the central lumen 11 corresponding to a portion of the distal segment of the catheter 1 in its extension direction. The distal lumen segment 11b extends to the distal end of the catheter 1. The ratio of the lengths of the proximal lumen segment 11a and the distal lumen segment 11b along the extension direction of the catheter 1 can be 1:0.5 to 1:3, such as 1:0.5, 1:1, 1:1.5, 1:2, 1:2.5, 1:3, etc.

[0091] The wall of the proximal segment 11a forms one or more first grooves 12, which extend along the extension direction of the conduit 1 and open toward the central cavity 11. At least a portion of the structure of at least one functional element 3 is disposed in the first groove 12.

[0092] In other words, the first groove 12 is both a part of the cavity wall of the proximal cavity segment 11a and at least a part of the functional component channel. At least in the section corresponding to the proximal cavity segment 11a, there is no continuous cavity wall in the radial cross section or a separate tube dedicated to accommodating the functional component 3, and the internal space of the above two is not used as the functional component channel. Instead, a portion of the cavity wall of the proximal cavity segment 11a is used as at least a portion of the cavity wall of the functional component channel, such that the proximal cavity segment 11a and the functional component channel share at least a portion of the cavity wall.

[0093] In this way, the radial cross-sectional space of the laryngeal mask 100 can be saved as much as possible while setting the functional component 3. More specifically, some embodiments can save the radial cross-sectional space of the catheter 1.

[0094] Generally, conduit 1 is produced by injection molding. Because the radial dimension of the functional component channel is small but its length is long, using a dedicated individual mold core to form the functional component channel means that this individual mold core also needs to have a small radial dimension and a long axial length. Generally, using a slender mold core for injection molding can easily lead to problems in the positioning of the mold core end and resistance to injection pressure. For example, the mold core end may be difficult to position, and the mold core may be easily deformed under pressure during injection. These problems directly affect product quality and production efficiency, and may result in mold core damage, incomplete injection, and voids in the walls of the functional component channel.

[0095] In this embodiment, since the space inside the first groove 12 and the space inside the proximal cavity 11a are connected, the molding of the first groove 12 and the cavity of the proximal cavity 11a can be completed using an integral mold core. This avoids the need to manufacture mold cores separately for the functional component channel and the cavity of the proximal cavity 11a, and thus avoids the problem that the functional component channel is difficult to mold using an independent mold core due to its small inner cavity radial cross-sectional size.

[0096] On the other hand, the connection between the first groove 12 and the proximal cavity section can provide more operating space for the assembly of the functional component 3, which facilitates the insertion and fixing of the functional component 3 during production and manufacturing, and improves the production efficiency of the laryngeal mask 100.

[0097] In this embodiment, the number of first grooves 12 can be one or more, and those skilled in the art can determine the specific number of functional components 3 that can be adapted according to actual needs.

[0098] It should be noted that when there is one or more functional components 3, only one or more of the functional components 3 may be provided in the first groove 12, and the remaining functional components 3 may not be provided in the first groove 12. In other words, at least one functional component 3 may not be provided in the first groove 12.

[0099] In cases where at least a portion of multiple functional components 3 need to be disposed in the first groove 12, one first groove 12 may correspond to one functional component 3; in other words, multiple functional components 3 may be disposed in different first grooves 12. Alternatively, one first groove 12 may correspond to multiple functional components 3; in other words, at least two functional components 3 may be disposed in the same first groove 12.

[0100] In some embodiments, the first groove 12 may be confined to the proximal cavity segment 11a of the central cavity 11, without extending to the distal cavity segment 11b of the central cavity 11. It is understood that the distal cavity segment 11b generally exhibits better flexibility, or the distal cavity segment 11b is located in a laryngeal cavity with greater spatial expandability, so there may be other options for the arrangement of the functional channel at this location, which is not limited in this embodiment.

[0101] As an example, in the distal cavity segment 11b of the central cavity 11, the functional component channel may be formed inside the central cavity 11 or in other functional cavities. Alternatively, the functional component channel may not be formed, and the functional component 3 may be exposed on the outer surface of the conduit 1. Or, the distal portion of the conduit 1 may form another groove that communicates with the first groove 12, and a portion of the structure of the functional component 3 may be disposed in this groove.

[0102] In some other embodiments, the first groove 12 may also extend to the distal cavity segment 11b of the central cavity 11.

[0103] In some embodiments, refer to Figures 6-9 The functional component 3 includes a suction / rinsing tube 32, and / or a light guide 31, and / or a viewing element 33. At least a portion of the suction / rinsing tube, and / or the light guide 31, and / or the viewing element 33 is disposed in the first groove 12 and extends into the cover cavity 2a.

[0104] The suction / flushing tube 32 can be connected to an external negative pressure device or a flushing device to suction sputum, refluxed material or other mucus accumulated in the cavity 2a of the laryngeal mask 100, or to perform a flushing operation. In some embodiments, the operation can be performed under visual or continuous monitoring conditions to improve the safety of the surgery and reduce patient complications.

[0105] The suction / irrigation tube 32 can refer to a single tube with a separate lumen, through which suction or irrigation can be performed at different times during the operation; it can also refer to multiple tubes, some mainly for suction and some mainly for irrigation; or it can refer to a single tube with a dedicated suction chamber and a dedicated irrigation chamber.

[0106] The viewing element 33 is used to realize the viewing function of the laryngeal mask 100. The viewing element 33 can be a viewing assembly formed by an imaging module (such as an image sensor such as CMOS or CCD) and cables. It can also be a viewing assembly in the form of a video tube, wherein an imaging module (such as an image sensor such as CMOS or CCD) is disposed at the distal end of the video tube. (See reference...) Figure 9 In practical use, the above-mentioned image element 33 can be connected to an image processing device and a display device to form a complete image device. In some embodiments, at least a portion of the image element 33 can be disposed in the first groove 12. Specifically, the image element 33 can be fixedly disposed in the first groove 12, such as fixing an image assembly formed by an imaging module and cables in the first groove 12; the image element can also be detachably disposed in the first groove 12, such as a video assembly formed by a video tube being detachably disposed in the first groove 12.

[0107] The light guide provides illumination to the imaging component. The light guide can be an electroluminescent device, such as a light-emitting diode (LED), or an optical fiber (including but not limited to glass and plastic optical fibers). In some embodiments, the light guide can be integrated into the imaging component; that is, the imaging component includes both the light guide and the imaging component. In these embodiments, the light guide and the imaging component can be disposed together in the same recess. In other embodiments, the light guide and the imaging component are separate. In these embodiments, the imaging component and the light guide can be disposed separately in different first recesses.

[0108] It should be noted that in this embodiment, the functional component 3 may include the suction / rinsing tube 32, the light guide 31 and the image component 33 at the same time, or it may include only one or both of them. Those skilled in the art can determine the specific components according to actual usage requirements.

[0109] In some embodiments, refer to Figures 1-6 The laryngeal mask 100 includes a connector 5, which includes a connecting platform 51 and an insertion part 52 connected to the connecting platform 51. The insertion part 52 is inserted into the proximal cavity segment 11a of the central cavity 11. The insertion part 52 has a core cavity 52a communicating with the central cavity 11. The core cavity 52a extends through the insertion part 52 along the extension direction of the catheter 1. A portion of the outer peripheral surface of the insertion part 52 covers the opening of the first groove 12.

[0110] In some embodiments, the connection platform 51 can be used to fix or position the functional component 3, or to provide connection connectors, interfaces, entry points, etc. for external devices.

[0111] As an example, in some embodiments, the connection platform 51 may include an entrance to an endoscope channel 100a through which endoscopes and / or surgical instruments may enter and exit the endoscope channel 100a of the laryngeal mask 100.

[0112] In some embodiments, the connection platform 51 may have a video interface through which the video device 33 can be connected to an external device, and the video device 33 can also enter the laryngeal mask 100 and be fixed to the connection platform 51 through this interface.

[0113] In some embodiments, the connection platform 51 may include a light guide 31 interface, the light guide 31 may be connected or fixed to this interface, and external light sources may also enter light through this light guide 31 interface.

[0114] In some embodiments, refer to Figure 9 The connector 5 may also include a protective sleeve 53, which is connected to the side of the connecting platform 51 away from the catheter 1. The protective sleeve 53 is used to accommodate the light guide 31 and / or the imaging element 33 to prevent liquid that may be left in the patient's body from contaminating the portion of the light guide 31 and / or the imaging element 33 that extends beyond the connecting platform 51 (i.e., the portion that extends out of the connecting platform 51 from the catheter 1).

[0115] In some embodiments, the connection platform 51 may include a suction / rinse tube interface to fix the suction / rinse tube 32 or select the path of the suction / rinse tube 32, etc.

[0116] In the above series of embodiments, the plug-in portion 52 is connected to the connecting platform 51. As an example, the plug-in portion 52 may be integrally formed with the connecting platform 51, or it may be connected to the connecting platform 51 by means of bonding, welding, or other methods. The plug-in portion 52 may be a tubular structure, and its cavity is formed as at least a part of the core cavity 52a.

[0117] One function of the insertion part 52 is to fix the connecting platform 51 relative to the catheter 1. Specifically, after the insertion part is inserted into the proximal lumen segment 11a of the central lumen 11, it can be fixed to the lumen wall of the proximal lumen segment 11a by means of such means as bonding, thereby fixing the connecting platform 51 relative to the catheter 1. Alternatively, after the insertion part is inserted into the proximal lumen segment 11a, it can form an interference fit with the proximal lumen segment 11a, thereby fixing the connecting platform 51 relative to the catheter 1.

[0118] Another function of the insertion part 52 is to increase the rigidity of the proximal end of the catheter 1. It is understood that there is a physiological curvature from the patient's mouth to the pharynx. During the insertion of the laryngeal mask 100, the distal part of the catheter 1 needs to deform accordingly to pass through and adapt to this physiological curvature. Therefore, the catheter 1 needs to be made of a material with a certain degree of flexibility. After the laryngeal mask 100 is inserted into the patient, the insertion part 52 is mainly located inside the patient's mouth. Generally, the patient's upper and lower incisors will bite against the proximal end of the laryngeal mask 100. Therefore, the insertion part 52 is generally made of a relatively rigid material. This increases the rigidity of the proximal end of the catheter 1, preventing the collapse of the cavity within the proximal end of the laryngeal mask 100 due to the biting of the patient's upper and lower incisors. It also facilitates the fixation of the proximal end of the laryngeal mask 100 during the operation, improving the stability of the laryngeal mask 100 position during the operation.

[0119] Another function of the insertion part 52 is to cover the open portion of the first groove 12, so that a portion of the circumferential surface of the insertion part 52 together with the first groove 12 forms a light guide channel that can accommodate at least a portion of the light guide 31, and / or a suction / rinsing tube channel that can accommodate at least a portion of the suction / rinsing tube 32, and / or a viewing channel that can accommodate at least a portion of the viewing element 33. That is, a portion of the circumferential surface of the insertion part 52 is used as a partial channel wall of the light guide channel, and / or the suction / rinsing tube channel, and / or the viewing channel; thereby allowing the light guide channel and / or the suction / rinsing tube to pass through. The channel and / or imaging channel form a circumferentially closed structure in the proximal portion of the catheter 1. This objectively saves radial space in the proximal segment of the laryngeal mask 100, while also maintaining the consistency of the positions of the light guide 31 and / or the suction / irrigation tube 32 and / or the imaging element 33, and improving structural stability. This reduces the likelihood of the light guide 31 detaching from its channel and affecting the use of the endoscope and / or surgical instruments. It also reduces external disturbances to the light guide 31, thus minimizing the pulling on its distal end and affecting the path of the illumination light or the product quality of the laryngeal mask 100. Furthermore, it reduces the possibility of the suction / irrigation tube 32 detaching from its channel and interfering with the endoscope or other instruments. Finally, it reduces the possibility of the imaging element 33 detaching from its imaging channel, preventing it from functioning properly.

[0120] Taking the two first grooves 12 as an example, in this embodiment, the two first grooves 12 are distributed circumferentially along the proximal cavity segment 11a of the central cavity 11, and part of the circumferential surface of the insertion part 52 simultaneously covers the open parts of the two first grooves 12.

[0121] In some embodiments, further, refer to Figure 6 The circumferential outer surface portion of the insertion part 52 protrudes to form at least one raised rib 521, which extends along the extension direction of the conduit 1 and is inserted into the first groove 12. As an example, the raised rib 521 may abut against one side of the circumferential groove wall of the proximal cavity segment 11a of the first groove 12.

[0122] In actual manufacturing, the first groove 12 and the central cavity 11 are integrally formed. Then, the light guide 31, and / or the suction / rinsing tube 32, and / or the imaging element 33 are inserted into the first groove 12. Finally, the insertion part 52 is inserted into the proximal cavity segment 11a of the central cavity 11, covering the open area of ​​the first groove 12. In this embodiment, the protruding rib 521 can provide positioning guidance for the insertion part 52 into the proximal cavity segment of the conduit 1 during assembly, improving assembly accuracy and efficiency. Furthermore, it can further control the paths of the light guide 31 and the suction / rinsing tube 32, thereby further improving their positional stability within the cavity.

[0123] In some embodiments, refer to Figure 7 The central cavity 11 includes a distal cavity 11b connected to the proximal cavity 11a. The cavity wall of the distal cavity 11b forms one or more second grooves 13 extending along the extension direction of the catheter 1. Each first groove 12 is provided with a second groove 13 communicating with it. A part of the structure of the functional component 3 is disposed in the second groove 13.

[0124] In this embodiment, a second groove 13 is formed in the wall of the distal cavity segment 11b of the central cavity 11. In this way, the functional component 3 will not be exposed on the surface of the distal part of the catheter 1, minimizing the scraping and compression of the patient's pharyngeal and laryngeal cavities, while improving the radial structural compactness of the distal segment of the catheter 1, thereby achieving the purpose of controlling the radial dimensions of the laryngeal mask 100.

[0125] Furthermore, in some embodiments, when the catheter 1 is manufactured using an injection molding process, the core extraction of the proximal portion and the core extraction of the distal portion of the catheter 1 can be performed separately. For example, the core extraction of the first groove 12 can be completed together with the proximal portion of the proximal lumen 11a and other functional lumens, and the core extraction of the second groove 13 can be completed together with the distal portion of the distal lumen 11b and other functional lumens. This further reduces the difficulty of core extraction.

[0126] In some embodiments, unlike the first groove 12, the opening direction of the second groove 13 is not limited. For example, it can open towards the central cavity 11 or towards the outer surface of the cavity wall of the central cavity 11.

[0127] In some embodiments, the central axis of the second groove 13 is substantially parallel to the central axis of the central cavity 11. This facilitates the extraction of the mold core used for molding the central cavity 11 and the mold core used for molding the second groove 13 together during injection molding of the conduit 1. If their central axes are not substantially parallel, extraction of the two mold cores together or separately may cause unexpected deformation or even damage to the cavity wall of the conduit 1, making it difficult to guarantee manufacturing quality.

[0128] In some embodiments, the second groove 13 is open to the outer surface of the cavity wall of the distal cavity segment 11b, and the cavity wall of the central cavity 11 is formed with at least one through hole (not shown in the figure), the through hole penetrates the cavity wall of the central cavity 11, and the through hole connects the first groove 12 and the corresponding second groove 13.

[0129] It can be understood that the outer surface of the wall of the distal segment 11b of the central lumen 11 is at least a part of the outer surface of the catheter 1.

[0130] In this embodiment, the opening of the second groove 13 faces the outer surface of the cavity wall of the central cavity 11, unlike the opening of the first groove 12 which faces the central cavity 11. As mentioned above, the radial dimension of the catheter 1 must be strictly controlled to meet clinical requirements; the functional component 3 generally adopts a smaller radial dimension. The second groove 13 is open to the outer surface of the cavity wall of the distal cavity segment 11b, which facilitates the injection molding of the catheter 1 during manufacturing. Specifically, the mold core used for molding the second groove 13 is relatively slender. Through the opening of the second groove 13, the slender mold core can extend and extend radially towards the opening, and even to the surface of the distal cavity segment 11b, thereby increasing the radial cross-sectional dimension of the mold core and strengthening its structural strength, thus solving problems such as mold core damage and molding voids during injection molding. Therefore, the mold core used for forming the second groove 13 and the mold core used for forming the first groove 12 are not structurally integrated. That is, the two molding mold cores are independent of each other. Before the plastic material is injected into the mold, the far end face of the molding mold core of the first groove 12 and the near end face of the molding mold core of the second groove 13 fit tightly together. After the plastic material is injected, the molding mold core of the first groove 12 is pulled out towards the near end of the guide tube 1, and the molding mold core of the second groove 13 is pulled out towards the far end of the guide tube 1, so as to realize the pulling and pulling operation of the two groove molding molds.

[0131] In addition, during subsequent production and assembly, the open portion of the second groove 13 also facilitates the quick installation of the functional component 3 into the two grooves through this open portion, thereby improving production efficiency and product quality.

[0132] The through-hole connects the first groove 12 and the second groove 13, and also connects the space inside and outside the central cavity 11. This allows the light guide channel, and / or the suction / rinsing tube channel, and / or the image channel to penetrate the cavity wall of the central cavity 11. Consequently, the light guide 31, and / or the suction / rinsing tube 32, and / or the image element 33 can be installed through the central cavity 11, making full use of the radial space of the conduit 1. In actual injection molding production, the mold core used for through-hole molding can be integrated with the mold core used for first groove 12 molding, or it can be integrated with the mold core used for second groove 13 molding; there is no restriction on this.

[0133] In some embodiments, the radial cross-sectional area of ​​the through hole is not greater than the radial cross-sectional area of ​​the first groove 12. When the mold core for forming the through hole and the mold core for forming the first groove 12 form an integral mold core, it is convenient for this integral mold core to be pulled out in the proximal direction of the guide tube 1, thereby reducing the unexpected deformation or damage of the through hole and the first groove 12 of the molded part guide tube 1.

[0134] In some other embodiments, the mold core for forming the through hole can also be integrally formed with the mold core for forming the second groove 13. In this embodiment, the radial cross-sectional area of ​​the through hole is not greater than the radial cross-sectional area of ​​the second groove 13.

[0135] In some embodiments, the central axis of the through hole and the central axis of the corresponding second groove 13 are respectively approximately parallel to the central axis of the central cavity 11.

[0136] This makes it possible to pull the forming core of the through hole, the forming core of the second groove 13, and the forming core of the distal cavity segment 11b of the central cavity 11 together toward the distal end of the conduit 1.

[0137] Alternatively, in some embodiments, the central axis of the through hole and the central axis of the corresponding second groove 13 are extensions of each other, thereby providing the possibility for the forming core of the through hole, the forming core of the second groove 13, and the forming core of the distal cavity segment 11b of the central cavity 11 to be pulled together toward the distal end of the conduit 1.

[0138] In the embodiment where the second groove 13 and the through hole are used together to complete the core extraction, the radial cross-sectional area of ​​the second groove 13 is not less than the radial cross-sectional area of ​​the through hole, so as to help reduce the difficulty of core extraction.

[0139] In some embodiments, the central axes of the first groove 12, the through hole, and the second groove 13 can be extended from each other, and the line formed by connecting the central axes of the first groove 12, the through hole, and the second groove 13 can be approximately parallel to the central axis of the central cavity 11. This provides the possibility for core extraction during injection molding by having the through hole, the first groove 12, and the second groove 13 be extracted together with adjacent sections of the central cavity 11; and further creates conditions for the functional component channel to be approximately parallel to the central cavity 11, facilitating the installation of the functional component 3 during production assembly.

[0140] In some embodiments, refer to Figure 6 The viewing element 33 is configured as a viewing tube, and the laryngeal mask 100 forms a viewing channel 100c, with at least a portion of the viewing tube disposed within the viewing channel 100c.

[0141] The viewing tube is detachably disposed in the viewing channel 100c. In actual use, the viewing tube can be inserted into the viewing channel 100c. As an example, the viewing tube can be a long and thin tube, with an image sensor disposed at its distal end, and can be controlled to bend or reset. A cable can be disposed inside the viewing tube, which can transmit the image signal collected by the image sensor to the display device, thereby enabling the insertion and removal of the laryngeal mask 100 under visual conditions, as well as continuous or intermittent monitoring during the operation. It should be noted that the display device can have its own signal processing and image display capabilities, or it can only have image display capabilities, with other components processing the image signals before displaying them through the display device.

[0142] In some embodiments, the viewing channel 100c may be formed by a separate cavity of the catheter 1. In some embodiments, the laryngeal mask 100 may include a viewing channel tube 4, the space within which is formed as at least a portion of the viewing channel 100c.

[0143] It is understood that in these embodiments, the image channel 100c is an independent cavity, and is not formed by the first groove 12 and the second groove 13 mentioned above. In other words, in this embodiment, the first groove 12 and / or the second groove 13 are formed as part of the light guide channel and / or the suction / rinsing tube channel, and are no longer formed as part of the image channel 100c.

[0144] The distal end of the viewing channel 100c has a channel wall extending into the cavity 2a. As an example, the distal end of the viewing channel 100c may be formed by the conduit 1 or the viewing channel tube 4. Alternatively, see... Figure 4 The laryngeal mask 100 may include a flexible tube 6 connected to the distal end of the catheter 1 or the video channel tube 4, and the channel wall at the distal end of the video channel 100c is formed by the flexible tube 6.

[0145] The end face of the channel wall at the distal end of the image channel 100c can be formed as a light-transmitting blind end 6a. This light-transmitting blind end 6a actually forms a window of the image channel 100c, allowing external light to enter the image sensor at the distal end of the image tube through this light-transmitting blind end 6a, thereby achieving imaging. This blind section can isolate the internal space of the tubing 6, catheter 1, or image channel tube 4 from the patient's internal environment, thereby reducing the disinfection level after use of the imaging device.

[0146] In the above embodiments, the central cavity 11 and the viewing channel 100c are isolated from each other. In the radial section of the proximal cavity segment 11a, the central cavity 11 is circular or nearly circular, and the viewing channel 100c is circular or nearly circular.

[0147] The line connecting the geometric center of the central cavity 11 and the geometric center of the viewing channel 100c is used as the reference line. Figure 6 The dashed line in the diagram represents the reference line. The shortest distance from any point on the first groove 12 to the reference line is less than the shortest radius of the central cavity 11. Specifically, the shortest radius refers to the minimum distance from the geometric center of the central cavity 11 to its wall in the radial section of the conduit 1. Taking a circular central cavity 11 as an example, the shortest radius is the radius of the central cavity 11. Taking a near-circular, such as an elliptical, central cavity 11 as an example, the shortest radius is the minor axis radius of the central cavity 11.

[0148] Thus, the outer surface of the catheter 1 will not form additional protrusions due to the setting of the first groove 12. In other words, the outer envelope of the central cavity 11 will remain arc-shaped and will not form protrusions. In other words, the cavity wall of the central cavity 11 will not thicken at the position corresponding to the first groove 12. In summary, this setting method of this embodiment can further improve the structural compactness of the laryngeal mask 100 and reduce the occupancy of the light guide 31 channel and / or the suction / rinsing tube 32 channel on the radial space of the proximal section of the catheter 1.

[0149] In some embodiments, any point on the first groove 12 in the radial section of the conduit 1 is located outside the reference line. This helps to shorten the distance between the geometric center of the central cavity 11 and the geometric center of the imaging channel 100c, further improving the structural compactness of the laryngeal mask 100. Of course, in some other embodiments, at least one point on the groove wall of the first groove 12 and / or at least one point within the space enclosed by the first groove 12 in the radial section of the conduit 1 is located on the reference line; for example, the geometric center of the first groove 12 may be located on the reference line.

[0150] In some embodiments, when a perpendicular line is drawn from any point on the first groove 12 to the reference line, the intersection of the perpendicular line and the reference line is located between the geometric center of the central cavity 11 and the geometric center of the image channel 100c. That is, along the extension direction of the reference line, the first groove 12 is approximately located between the central cavity 11 and the image cavity. In this way, the light guide 31 will be positioned relatively close to the image cavity, which helps to improve the illumination effect of the light guide 31, thereby improving image quality. At the same time, it is beneficial to set the first groove 12 without forming an additional protrusion on the outer surface of the guide tube 1. Of course, in some other embodiments, the first groove 12 may not be located in the above position, but in any other suitable position, such as on the side of the central cavity 11 away from the image cavity.

[0151] In some embodiments, the proximal cavity segment 11a forms two first grooves 12, which are symmetrically distributed with respect to the reference line.

[0152] In some embodiments, the central axis of the first groove 12 may be substantially parallel to the central axis of the central cavity 11. Thus, when the conduit 1 is produced by injection molding, the central cavity 11 and the first groove 12 can be formed in a single pull-out operation of the integral mold core.

[0153] Similar to the first groove 12, in some embodiments, in the radial section of the conduit 1, the line connecting the geometric center of the central cavity 11 and the geometric center of the image cavity is used as the reference line, and the shortest distance from any point on the second groove 13 to the reference line is less than the shortest radius of the central cavity 11.

[0154] In some embodiments, on the radial section of the conduit 1, any point on the second groove 13 is located outside the reference line, and / or when a perpendicular line is drawn from any point on the second groove 13 to the reference line, the intersection of the perpendicular line and the reference line is located between the geometric center of the central cavity 11 and the geometric center of the viewing channel 100c.

[0155] The above series of embodiments are all conducive to achieving the goal of at least partially setting the channel of the functional component 3 within the wall of the distal segment 11b of the central cavity 11, while keeping the radial dimension of the distal segment of the catheter 1 from being increased additionally.

[0156] In some embodiments, refer to Figures 1-6 The outer surface of the catheter 1 is recessed inward to form a limiting groove 14, which extends from the proximal end to the distal end of the catheter 1. The laryngeal mask 100 includes a viewing channel tube 4, most of which can be arranged side-by-side with the catheter 1. The space within the viewing channel tube 4 forms at least a portion of the viewing channel 100c, and a portion of the viewing channel tube 4 is located within the limiting groove 14. As an example, the outer surface of the wall of the viewing channel tube 4 can be bonded or welded to at least a portion of the surface of the limiting groove 14, or the viewing channel tube 4 can be snapped into the limiting groove 14 by a corresponding structure or other connection methods.

[0157] In this embodiment, the viewing channel tube 4 is independent of the catheter 1, and the space within the viewing channel tube 4 is formed as at least a portion of the viewing channel 100c. That is, the viewing channel 100c is not located within the catheter 1, thereby reducing the number of functional cavities within the catheter 1, which helps to reduce the manufacturing difficulty of the catheter 1 and may also improve the smoothness of insertion and removal of the viewing tube. At the same time, the outer surface of the catheter 1 is recessed inward to form a limiting groove 14, and a portion of the viewing channel tube 4 is located within the limiting groove 14. This helps to make the connection between the catheter 1 and the viewing channel tube 4 more compact, thereby reducing the radial cross-sectional dimensions of the laryngeal mask 100 and saving space for the central lumen 11 and other functional cavities of the catheter 1.

[0158] As mentioned above, the distal wall of the image channel 100c needs to extend into the cover cavity 2a. In some embodiments, the distal cavity and corresponding distal wall of the image channel tube 4 are formed as the distal segment and corresponding distal wall of the image channel 100c, the distal cavity and corresponding distal wall of the image channel tube 4 extend into the cover cavity 2a, and the distal end of the image channel tube 4 forms a light-transmitting blind end 6a. Further, in some embodiments, the distal end of the light guide 31 is fixed to the distal outer wall of the image channel tube 4.

[0159] In some other embodiments, the laryngeal mask 100 includes a flexible tube 6, the proximal end of which is connected to the distal end of the viewing channel tube 4, including by bonding, welding, or snap-fitting. At least a portion of the flexible tube 6 extends into the mask cavity 2a. The lumen and body of the flexible tube 6 form the distal segment and corresponding distal wall of the viewing channel 100c, and the distal end of the flexible tube 6 forms a light-transmitting blind end 6a. Further, in some embodiments, the distal end of the light guide 31 is fixed to the distal outer wall of the flexible tube 6.

[0160] In the embodiments described above, which include the video channel tube 4 and the flexible tube 6, the light guide 31 can also be fixedly connected to the cavity 2a in the manner described above. These details will not be elaborated upon here.

[0161] In some embodiments, the second groove 13 is connected to the limiting groove 14. As mentioned above, the radial cross-sectional dimension of the second groove 13 is relatively small, and its core size is also correspondingly small when processed using injection molding. The problems of slender cores during injection molding have been mentioned above and will not be repeated here. However, by connecting the second groove 13 to the limiting groove 14, the core used for molding the second groove 13 and the core used for molding the limiting groove 14 can be integrated into a single unit, forming an integral core. Furthermore, the radial cross-sectional dimension of the limiting groove 14 is significantly larger than that of the second groove 13. Therefore, the radial dimension of this integral core is relatively large, which can effectively solve the problem of difficult injection molding of a small core.

[0162] Furthermore, in some embodiments, the mold cores used for forming the second groove 13 and the limiting groove 14 are integrally formed, and the mold cores used for forming the proximal cavity segment 11a and the first groove 12 are integrally formed. The former forms an integral lower mold core, and the latter forms an integral upper mold core. In the extension direction of the conduit 1, the proximal end face and the distal end face of the integral lower mold core abut against each other. These two abutting surfaces may or may not be located within the space of the through hole. During the mold core extraction molding process, the integral upper mold core may be extracted alone or together with the corresponding mold cores used for forming other functional cavities of the conduit 1, such as the mold core used to form a part of the ventilation channel 100b, towards the proximal segment of the conduit 1. The integral lower mold core may be extracted alone or together with the corresponding mold cores used for forming other functional cavities of the conduit 1, such as the mold core used for forming the distal cavity segment 11b of the central cavity 11, towards the distal segment of the conduit 1. The above bidirectional mold core extraction method can be carried out simultaneously or sequentially. It not only helps to solve the problem of the mold core being too long and difficult to extract when using the unidirectional mold core extraction method, but also effectively addresses the problem that in some cases, the guide tube 1 is pre-bent. The pre-bending arc may cause the mold core to get stuck and difficult to extract, which may lead to unexpected deformation or even damage to the molded part of the guide tube 1.

[0163] The second groove 13 communicates with the limiting groove 14, facilitating the assembly of the functional component 3 into the second groove 13 or even the first groove 12 via the limiting groove 14 during assembly. In this embodiment, the image channel tube 4 can close the opening of the second groove 13. That is, when the functional component 3 is assembled into the second groove 13 via the limiting groove 14, the outer surface of part of the wall of the image channel tube 4 and the cavity surface of the second groove 13 jointly define part of the functional component channel. This further improves the stability of the functional component 3's position and reduces the probability of the functional component 3 detaching. For example, it reduces the possibility of the light guide 31 detaching, affecting the quality of the illumination light, and thus leading to a decrease in image quality, and / or reduces the possibility of the suction / rinsing tube 32 detaching, causing blockage or interference with other structures.

[0164] In some embodiments, refer to Figure 8 In the radial section of the laryngeal mask 100, the second groove 13 includes a first part 13a and a second part 13b that are interconnected. The second part 13b connects the first part 13a and the limiting groove 14. The first part 13a is circular or near-circular. After actual assembly, the functional component 3 can be located within the first part 13a. Conventionally, some functional components 3 are circular or near-circular in shape. Therefore, a circular or near-circular first part 13a is more suitable for the shape and structure of such functional components 3. In addition, during assembly, a circular or near-circular first part 13a also makes it easier for the functional component 3 to be quickly inserted into place, avoiding edge friction.

[0165] In some embodiments, refer to Figure 8 Specifically, the catheter 1 includes two flanges 15. The outer surface of the wall of the distal lumen segment 11b has a recessed mating surface 16. The two flanges 15 are located on opposite sides of the recessed mating surface 16 in the peripheral direction of the catheter 1 and are spaced apart. The two flanges 15 extend from the proximal end to the distal end of the wall of the distal lumen segment 11b. The ends of the two flanges 15 facing each other are spaced apart and define a limiting groove 14 with the recessed mating surface 16. The inner surface of the flanges 15 facing the recessed mating surface 16 is spaced apart from the recessed mating surface 16 and defines a second groove 13.

[0166] This arrangement helps to form the second groove 13 without significantly increasing the wall thickness of the central cavity 11, thereby saving radial space in the laryngeal mask 100. Furthermore, it facilitates a tight fit between the two flanges 15 and the outer surface of the viewing channel tube 4, making it possible for the functional component 3 to remain uncovered on the surface of the conduit 1. In some embodiments, the tight fit between the two flanges 15 and the outer surface of the viewing channel tube 4 creates conditions for the functional component channel to form a sealed channel.

[0167] In some embodiments, in the radial section of the distal cavity 11b, the outer surface of the catheter 1 on the side near the viewing channel 100c has a first arc, and the outer surfaces of the two flanges 15 are located on the first arc. It can be understood that the first arc is actually the outer envelope of the catheter 1, and the outer surfaces of the two flanges 15 are located on the first arc, that is, the outer surfaces of the two flanges 15 form the outer envelope of the catheter 1, and the second groove 13 defined by the two flanges 15 is located within the outer envelope of the catheter 1. Thus, the outer surface of the laryngeal mask 100 will not form an additional protrusion due to the provision of the second groove 13.

[0168] In some embodiments, the conduit 1 has an air guide cavity 17 located on the side of the central cavity 11 away from the viewing channel 100c, and the air guide cavity 17 at least forms a part of the structure of the ventilation channel 100b.

[0169] In some embodiments, refer to Figure 10 and Figure 11 The laryngeal mask 100 includes a support body 8, which protrudes from the inner surface of the cavity wall of the air delivery chamber 17 and extends along the extension direction of the duct 1.

[0170] Since the sealing seat 2 is made of a flexible material, the conduit 1 may be made of the same or similar flexible material as the sealing seat 2, or a more rigid flexible material. This means that the channel wall of the ventilation channel 100b is more likely to be deformed and / or its dimensions changed due to compression. This may lead to a reduction in the effective radial cross-sectional area of ​​the ventilation channel 100b's wall. Here, the effective radial cross-sectional area refers to the minimum cross-sectional area enclosed by the wall of the ventilation channel 100b in the radial direction. This cross-sectional area directly affects the flow velocity and flow rate of the airflow entering and exiting the ventilation channel 100b. In this embodiment, the minimum cross-sectional area is usually caused by the deformation and / or dimensional changes of the channel wall of the ventilation channel 100b. To a certain extent, the smaller the effective radial cross-section, the less conducive it is to ventilation of the patient's lungs, leading to a decrease in the reliability of the ventilation function.

[0171] In practical use, due to the large size of some endoscopes and / or surgical instruments, the ventilation channel 100b may be compressed during use, causing deformation and / or dimensional changes in the ventilation channel 100b, thus reducing its effective radial cross-sectional area. Furthermore, organs or tissues in the patient's mouth or pharynx may also exert radial compression on the ventilation channel 100b wall. Even worse, these two factors may overlap during surgery; and since endoscopes and / or surgical instruments generally do not compress radially, this further complicates the issue. The ventilation channel 100b walls adjacent to the endoscope and / or surgical instruments are unlikely to deform or expand towards the endoscope and / or surgical instruments; instead, some ventilation channel 100b walls adjacent to the endoscope and / or surgical instruments may move closer to the compressing organ or tissue. In this case, the probability of a reduction in the effective radial cross-sectional area of ​​the ventilation channel 100b further increases.

[0172] Therefore, in this embodiment, the laryngeal mask 100 further includes a support 8, which protrudes from the inner surface of the cavity wall of the air delivery chamber 17 and extends along the extension direction of the conduit 1, thereby limiting changes in the radial cross-sectional shape and / or size of the air delivery chamber 17 and essentially solving the problem of reduced effective radial cross-sectional area of ​​the ventilation channel 100b. In this way, the reliability of the ventilation function can be improved while enabling the insertion of endoscopes and / or surgical instruments.

[0173] The support 8 can be integrally injection molded with the conduit 1, or it can be connected to the conduit 1 by secondary injection molding, bonding, welding, snap-fitting, etc. There are no restrictions on this.

[0174] In some embodiments, the air guide cavity 17 and the central cavity 11 are distributed along a first direction, as mentioned above, which is the distribution direction of the endoscope channel 100a and the ventilation channel 100b, and at least one support 8 protrudes from the inner surface of one side of the air guide cavity 17 along the first direction.

[0175] It is understood that in embodiments where the air delivery cavity 17 and the central cavity 11 are distributed along the first direction, the channel wall of the ventilation channel 100b may deform under the force of the patient's pharyngeal and laryngeal tissues and / or endoscope and / or surgical instruments during the insertion of the laryngeal mask 100 and during surgery. In this embodiment, at least one support 8 protrudes from the inner surface of the air delivery cavity 17 along the first direction, thus limiting changes in the shape and / or size of the ventilation channel 100b along the first direction, thereby reducing the probability of a decrease in the effective radial area of ​​the ventilation channel 100b and improving the reliability of the ventilation function.

[0176] In this embodiment, the support 8 may protrude from the air guide cavity 17 on the side close to the central cavity 11 in the first direction, or it may protrude from the air guide cavity 17 on the side away from the central cavity 11 in the first direction. Alternatively, some of the support 8 may protrude from the air guide cavity 17 on the side close to the central cavity 11 in the first direction, while others may protrude from the air guide cavity 17 on the side away from the central cavity 11 in the first direction.

[0177] In some embodiments, at least one support 8 protrudes from one inner surface of the air guide cavity 17 along a first direction and is spaced apart from the other inner surface of the air guide cavity 17 along the first direction.

[0178] In this embodiment, while providing support for the ventilation channel 100b along the first direction, the support body 8 can also allow the ventilation channel 100b to undergo a certain deformation along the first direction, thereby making it possible for the channel wall of the endoscope channel 100a to expand along the first direction in the section where the support body 8 is located, thus improving the smoothness of the passage of the endoscope and / or surgical instruments.

[0179] In some embodiments, the conduit 1 has a first arcuate wall 171 and a second arcuate wall 172 disposed opposite to each other along a first direction. The first arcuate wall 171 and the second arcuate wall 172 surround at least a portion of the structure forming the air-conducting cavity 17. The first arcuate wall 171 is located on the side of the second arcuate wall 172 away from the central cavity 11. Both circumferential ends of the first arcuate wall 171 and both circumferential ends of the second arcuate wall 172 are curved toward the central cavity 11, and the curvature of the first arcuate wall 171 is greater than the curvature of the second arcuate wall 172. In this embodiment, a support 8 is disposed on the surface of at least one of the first arcuate wall 171 and the second arcuate wall 172 facing the other.

[0180] It should be noted that the laryngeal mask 100 may also exclude the support body 8.

[0181] In some embodiments, refer to Figure 5 A portion of the insertion part 52 is inserted into the proximal portion of the air guide cavity 17. The insertion part 52 has an air vent 52b, which communicates with the air guide cavity 17 and forms part of the air passage 100b.

[0182] In this embodiment, a portion of the insertion part 52 is inserted into the air guide cavity 17. For example, see [reference]. Figure 6The insertion portion 52 can form at least one arc-shaped insertion piece 522, wherein at least one arc-shaped insertion piece 522 has the same curvature as the first arc-shaped wall 171 and is fitted to the surface of the first arc-shaped wall 171 facing the second arc-shaped wall 172, and / or, at least one arc-shaped insertion piece 522 has the same curvature as the second arc-shaped wall 172 and is fitted to the surface of the second arc-shaped wall 172 facing the first arc-shaped wall 171. This helps to improve the structural strength of the ventilation channel 100b and reduces the possibility of the ventilation channel 100b collapsing due to compression from the patient's oral tissues, thereby affecting its ventilation function.

[0183] In some embodiments, still refer to Figure 5 The connecting platform 51 has a ventilation connector 511, which forms a connector cavity 511a. The connector cavity 511a, the ventilation cavity 52b, and the air guide cavity 17 are sequentially connected to form at least a portion of the ventilation channel 100b. In actual use, the ventilation connector 511 can be connected to a breathing tubing.

[0184] In some embodiments, still refer to Figure 5 The central axis of the connector cavity 511a is coplanar with the central axis of the core cavity 52a, and the central axis of the connector cavity 511a intersects with the central axis of the core cavity 52a. In this embodiment, the angle formed between the central axis of the connector cavity 511a and the central axis of the core cavity 52a helps to avoid the proximal opening of the core cavity 52a and expands the operating space for the operator to insert and operate the endoscope and / or surgical instruments.

[0185] In some embodiments, as mentioned above, functional component 3 includes a suction / rinsing tube 32. In this embodiment, refer to... Figure 2 and Figure 3 The proximal end of the suction / rinsing tube 32 is provided with an external device interface and a cover 321. The cover 321 is used to open or close the lumen of the suction / rinsing tube 32. In actual use, if suction / rinsing is required, the cover 321 can be opened, and then the lumen of the suction / rinsing tube 32 can be connected to an external device through the external device interface to achieve the relevant function. If suction / rinsing is not required, the cover 321 can be closed to prevent gas in the laryngeal mask 100 cavity 2a from leaking from the suction / rinsing tube 32.

[0186] In some embodiments, the suction / rinsing tube 32 extends into the mask cavity 2a and is fixed relative to the sealing seat 2. The suction / rinsing tube 32 has at least one opening at its end and / or distal sidewall, thereby enabling communication between the distal end of the suction / rinsing tube 32 and the mask cavity 2a. Liquid or gas in the mask cavity 2a can be suctioned out through this opening, and the operator can also perform rinsing operations on the mask cavity 2a or patient tissue through this opening.

[0187] In some other embodiments, an extension cavity (not shown in the figure) is formed within the sealing seat 2. The extension cavity has at least one opening at its end and / or distal sidewall, through which it communicates with the cover cavity 2a. The proximal end of the extension cavity is sealed to the distal end of the suction / rinsing tube 32, thus establishing communication between the extension cavity and the suction / rinsing tube 32. This achieves communication between the distal end of the suction / rinsing tube 32 and the cover cavity 2a.

[0188] By providing at least one opening at the end and / or distal end of the suction / rinsing tube 32, or by providing at least one opening at the end and / or distal sidewall of the extension cavity, it is possible to facilitate effective suction / rinsing of the patient's pharynx and the space of the mask cavity 2a corresponding to the distal end of the video tube.

[0189] In some other embodiments, reference is made to... Figure 11 The distal end of the suction / rinsing tube 32 is connected to the channel wall at the distal end of the video channel 100c.

[0190] As an example, the distal end of the suction / rinsing tube 32 can be connected to the channel wall at the distal end of the video channel 100c by means of bonding, welding, snap-fitting, integral molding, etc. Alternatively, the distal end of the suction / rinsing tube 32 can be connected to the channel wall at the distal end of the video channel 100c by other intermediate structures, without limitation.

[0191] In this embodiment, by connecting the distal end of the suction / rinsing tube 32 to the channel wall at the distal end of the video channel 100c, it is helpful for the suction / rinsing tube 32 to better perform suction, rinsing, etc. on the position corresponding to the field of view of the video device, thereby helping to improve the image quality acquired by the video device.

[0192] In some embodiments, as mentioned above, functional element 3 includes light guide element 31. In this embodiment, referring to... Figure 4 The distal end of the light guide 31 can be connected to the channel wall at the distal end of the viewing channel 100c. Alternatively, the distal end of the light guide 31 can be fixed relative to the sealing seat 2.

[0193] The advantage of connecting the distal end of the light guide 31 to the channel wall at the distal end of the viewing channel 100c is that it helps to provide better illumination for the viewing device. The advantage of fixing the distal end of the light guide 31 to the sealing seat 2 is that it can reduce manufacturing difficulty and cost.

[0194] It should be noted that in embodiments where functional component 3 includes both suction / rinsing tube 32 and light guide 31, suction / rinsing tube 32 and light guide 31 can both be connected to the channel wall at the far end of the viewing channel 100c, or suction / rinsing tube 32 and light guide 31 can both be fixed relative to the sealing seat 2, or one of suction / rinsing tube 32 and light guide 31 can be connected to the channel wall at the far end of the channel, and the other can be fixed relative to the sealing seat 2.

[0195] In some embodiments, refer to Figure 12 and Figure 13 The laryngeal mask 100 includes a flexible tube 6. The distal channel wall of the viewing channel 100c is formed by the flexible tube 6. The distal end face of the flexible tube 6 is formed as a light-transmitting blind end 6a. When the viewing tube is bent and reset in a controlled manner, the flexible tube 6 can synchronously follow the bending and resetting of the viewing tube. In this embodiment, the distal end of the suction / rinsing tube 32 and / or the distal end of the light guide 31 are connected to the flexible tube 6.

[0196] Here, the specific structural form of the hose 6 is not limited. As an example, the hose 6 is a corrugated pipe made of flexible material. The fact that the distal end face of the hose 6 forms a light-transmitting blind end 6a specifically means that the distal end face of the hose 6 is a blind end (i.e., a closed end), and this end face can transmit light. As an example, this end face can be integrally formed with the hose, or a transparent material (such as glass, polycarbonate PC, etc.) can be selected as the blind end face. During manufacturing, the transparent blind end face is connected to the hose by means of bonding, snap-fitting, etc.

[0197] In this embodiment, the flexible tube 6 can bend and reset synchronously with the video tube, thereby achieving controlled adjustment of the video tube's viewing angle. The advantage of connecting the suction / rinsing tube 32 to the flexible tube 6 is that the suction / rinsing tube 32 can bend and reset synchronously with the flexible tube 6, thus maintaining cleanliness at the location corresponding to the video tube's field of view during the bending and resetting process. The advantage of connecting the light guide 31 to the flexible tube 6 is that the light guide 31 can bend and reset synchronously with the flexible tube 6, thus providing better illumination for the video tube during the bending and resetting process.

[0198] In some embodiments, refer to Figure 12 and Figure 13 The cavity wall of the cover cavity 2a protrudes to form a baffle 21. The baffle 21 is located on the far side of the hose 6 and is spaced apart from the hose 6. When the hose 6 is in the reset state, in the orthographic projection along the extension direction of the hose 6, the projection of the baffle 21 and the projection of the blind end 6a partially overlap along the first direction. Alternatively, the distance between the projection of the baffle 21 and the projection of the blind end 6a along the first direction does not exceed 10 mm. As mentioned above, the first direction is the distribution direction of the endoscope channel 100a and the ventilation channel 100b.

[0199] Here, the specific structural form of the baffle 21 is not limited. The baffle 21 can be integrated with the cavity wall of the cover cavity 2a, or the baffle 21 can be connected to the cavity wall of the cover cavity 2a of the sealing seat 2 by means of bonding, welding or other methods.

[0200] The specific interval between the baffle 21 and the hose 6 can be determined based on the specific length of the cavity 2a along the extension direction of the hose 6, and there is no limitation on this.

[0201] The state of the hose 6 being in the reset state specifically refers to the state in which the image tube and the hose 6 are not bent in a controlled manner. More specifically, in this state, the central axis of the hose 6 is approximately parallel to the central axis of the conduit 1.

[0202] It is understandable that during the use of the laryngeal mask airway 100, there may be situations where viscous fluid, refluxed material, foam, etc. from the patient's airway enter the mask cavity 2a. In this embodiment, by setting a baffle 21 on the distal side of the tubing 6, the viscous material in the viscous fluid, solid substances in the refluxed material, foam, etc. can be kept in the front space of the mask cavity 2a as much as possible, avoiding or reducing the above substances flowing with the liquid to the opening of the suction / flushing tube 32 and / or the blind end of the tubing 6, which may affect the smoothness of the suction operation and / or the imaging quality of the imaging tube.

[0203] It should be noted that since the image tube and the flexible tube 6 can bend and reset synchronously, even in the embodiment where the projection of the baffle 21 and the projection of the blind end 6a partially overlap along the first direction, the obstruction of the baffle 21 can still be avoided by adjusting the image tube to bend it appropriately. Therefore, the setting of the baffle 21 has a limited impact on the field of view of the image tube.

[0204] In some embodiments, refer to Figure 11 and Figure 12 The cavity 2a has a bottom wall 22 and a first side wall 23 and a second side wall 24 disposed opposite to each other along a first direction. The first side wall 23 and the second side wall 24 are connected to the bottom wall 22. The first side wall 23 is disposed adjacent to the hose 6. A baffle 21 is disposed on the first side wall 23. The baffle 21 includes a first end 21a and a second end 21b disposed opposite to each other. The first end 21a is connected to the bottom wall 22.

[0205] In this embodiment, during some surgical / diagnostic procedures, the patient needs to maintain a left lateral decubitus position. At this time, the laryngeal mask 100 is placed in the patient's airway. Relative to the second sidewall 24 and bottom wall 22 of the mask cavity 2a, most of the first sidewall 23 is in a lower position. Mucus or refluxed material in the patient's airway tends to accumulate on the first sidewall 23. By placing the baffle 21 on the first sidewall 23 and connecting its first end 21a to the bottom wall 22, the viscous material in the viscous fluid, solid substances in the refluxed material, foam, etc. can be more effectively retained in the front area of ​​the first sidewall. This area is surrounded by part of the first sidewall 23, the bottom wall 22, the baffle 21, and the patient's tissue.

[0206] In some embodiments, refer to Figure 11 and Figure 12 The baffle 21 has a guide slope 21c that is away from the hose 6. Along the direction from the end away from the first sidewall 23 to the end close to the first sidewall 23, the guide slope 21c is inclined toward the side where the hose 6 is located.

[0207] Here, the flow-guiding slope 21c and the first sidewall 23 actually form a wedge-shaped space. The flow-guiding slope 21c can guide the flowing material into the wedge-shaped space, thereby further improving the blocking effect of the baffle 21. In this embodiment, the specific inclination angle of the flow-guiding slope 21c is not limited. As an example, the angle between the flow-guiding slope 21c and the first direction is 10°-80°.

[0208] In some embodiments, the end face of the second end 21b of the baffle 21 is flush with or lower than the ventral end face of the sealing seat 2. This reduces the scraping of the end face of the baffle 21 against the patient's airway when the laryngeal mask 100 is inserted, and also reduces the likelihood of the end face of the baffle 21 compressing the patient's laryngeal tissue during the procedure.

[0209] It should be noted that in some embodiments, the baffle 21 may not be formed inside the cavity 2a.

[0210] In some embodiments, at least a portion of the conduit 1 is pre-bent.

[0211] As mentioned above, due to the physiological curvature between the patient's mouth and pharynx, at least a portion of the catheter 1 will exhibit a certain curvature after the laryngeal mask 100 is inserted into the patient to accommodate the patient's physiological curvature. Therefore, in this embodiment, at least a portion of the catheter 1 is pre-bent to facilitate the insertion of the laryngeal mask 100.

[0212] In related technologies, catheters and sealing seats are usually manufactured using the same material, such as silicone. To meet the sealing requirements of the sealing seat, these materials are usually relatively soft, and correspondingly, their surface sliding friction coefficient is relatively high. In this case, when the endoscope and / or surgical instruments pass through the curved part of the catheter, they may come into contact with part of the soft endoscope channel 100a wall with a high friction coefficient, generating greater resistance to insertion or removal, which may also cause the catheter to deform or shift, thus significantly affecting the operator's normal operation.

[0213] Therefore, in some embodiments, the hardness of the insertion part 52 is greater than the hardness of the catheter 1, and the hardness of the catheter 1 is greater than the hardness of the sealing seat 2. In this embodiment, the hardness of the catheter 1 is set to be greater than the hardness of the sealing seat 2, that is, the hardness of the catheter 1 is relatively increased. This reduces the frictional resistance of the endoscope and / or surgical instruments passing through the curved part of the catheter 1, reduces the probability of deformation of the catheter 1, and enables the catheter 1 to provide better guidance, thereby allowing the endoscope and / or surgical instruments to pass through the curved part of the catheter 1 more smoothly. Furthermore, the fact that the hardness of the insertion part 52 is greater than the hardness of the catheter 1 can effectively reduce the possibility of collapse of the proximal endoscope channel 100a and other channels of the laryngeal mask 100 due to the patient's incisor occlusion, and improve the stability of the proximal end of the laryngeal mask 100 in the oral cavity.

[0214] As an example, the sealing seat 2 can be made of silicone, while the catheter 1 can be made of polyvinyl chloride (PVC). The advantage of using silicone for the sealing seat 2 is that it can better conform to the patient's throat, forming a better seal. When PVC and silicone have similar hardness values ​​and are both used to make catheter 1, PVC has a lower coefficient of sliding friction and better mechanical stability. Therefore, using PVC to make catheter 1 improves the smoothness of the passage of endoscopes and / or surgical instruments.

[0215] In some embodiments, as mentioned above, the insertion portion 52 has a core cavity 52a communicating with the central cavity 11. The core cavity 52a extends through the insertion portion 52 along the extension direction of the catheter 1. In this embodiment, a sealing cavity 2b can be formed on the back side of the sealing seat 2. The ventral side of the sealing cavity 2b is closed and the back side is at least partially open. The core cavity 52a, the central cavity 11, and the sealing cavity 2b are connected in sequence to form an endoscope channel 100a.

[0216] In this embodiment, forming a sealing cavity 2b on the back side of the sealing seat 2 helps to improve the guiding ability of the endoscope and / or surgical instruments.

[0217] In some other embodiments, the back side of the sealing seat 2 may not form a sealing seat cavity 2b, and the distal end of the central cavity 11 may be open, allowing the endoscope and / or surgical instruments to pass through the central cavity 11 and directly enter the patient's digestive tract.

[0218] In some embodiments, refer to Figure 3 The laryngeal mask airway 100 also includes a fixing strap 7, with one end of the strap 7 fixed relative to the catheter 1 and the second end detachably connected to the catheter 1. Thus, after the laryngeal mask airway 100 is inserted into the patient, the fixing strap 7 can be used to quickly fix the proximal end of the laryngeal mask airway 100 relative to the patient's head and neck, facilitating subsequent diagnostic or treatment procedures by the operator, without the need to use medical tape to fix the laryngeal mask airway 100 to the patient's face or jaw (because the radial cross-sectional dimension of this type of laryngeal mask airway 100 is relatively large, making it inconvenient to use medical tape for fixation).

[0219] The specific connection method between the fixing strap 7 and the catheter 1 is not limited. As an example, in an embodiment where the laryngeal mask 100 includes the connector 5, the first end of the fixing strap 7 can be fixed relative to the connecting platform 51, thereby transmitting the force to the entire laryngeal mask 100, and the second end can be detachably connected to the connecting platform 51, further enabling the force of the second end to be transmitted to the entire laryngeal mask 100.

[0220] The fixation strap 7 can be made of a flexible material with elasticity, such as silicone, thus improving the stability of the laryngeal mask 100 in the patient's airway while avoiding rigid fixation that could cause damage to the patient's related tissues.

[0221] In some embodiments, the second end of the fixation strap 7 may be provided with a plurality of insertion holes 7a distributed along the length direction of the fixation strap 7, and a T-shaped insert 512 may be formed on the connecting platform 51. The T-shaped insert 512 can be inserted into any one of the insertion holes 7a to achieve a detachable connection between the fixation strap 7 and the connecting platform 51. In this way, the T-shaped insert 512 can be inserted into the appropriate insertion hole 7a according to the actual use requirements, so that the fixation strap 7 can be adapted to patients of different body types and to prevent the fixation strap 7 from accidentally falling off the T-shaped insert 512.

[0222] The laryngeal mask 100 in one or more embodiments mentioned above will be described in more detail below with reference to a specific embodiment.

[0223] Reference Figures 1-13 The laryngeal mask airway 100 forms an endoscope channel 100a, a ventilation channel 100b, and a viewing channel 100c. Specifically, the laryngeal mask airway 100 includes a tubing 1, a sealing seat 2, a connector 5, functional components 3, a support body 8, and a fixing strap 7. There are three functional components 3: one is a light guide 31, another is a suction / rinsing tube 32, and the third is a viewing component 33, specifically configured as a viewing tube.

[0224] The conduit 1 includes a conduit 1 and a viewing channel tube 4 arranged side by side. The outer surface of the conduit 1 is recessed to form a limiting groove 14, which extends from the proximal end of the conduit 1 to the distal end of the conduit 1. A portion of the viewing channel tube 4 is located within the limiting groove 14. The space within the viewing channel tube 4 forms at least a portion of the viewing channel 100c.

[0225] The sealing seat 2 is disposed at the distal end of the catheter 1. The ventral side of the sealing seat 2 forms a cover cavity 2a, and the dorsal side forms a sealing seat cavity 2b. The ventral side of the sealing seat cavity 2b is closed, and the dorsal side is at least partially open.

[0226] The catheter 1 has a central lumen 11, which is connected to the sealing seat lumen 2b, and the central lumen 11 forms at least a part of the structure of the endoscope channel 100a.

[0227] The catheter 1 has an air guide cavity 17, which at least forms part of the structure of the ventilation channel 100b.

[0228] At least one support 8 protrudes from the circumferential inner surface of the cavity wall of the air guide cavity 17 and extends along the extension direction of the conduit 1.

[0229] The catheter 1 has a first arc-shaped wall 171 and a second arc-shaped wall 172 disposed opposite to each other, and the first arc-shaped wall 171 and the second arc-shaped wall 172 surround and form at least a part of the structure of the air guiding cavity 17. The first arc-shaped wall 171 is located on the side of the second arc-shaped wall 172 away from the central cavity 11. Both the circumferential ends of the first arc-shaped wall 171 and the circumferential ends of the second arc-shaped wall 172 are curved toward the central cavity 11, and the curvature of the first arc-shaped wall 171 is greater than the curvature of the second arc-shaped wall 172.

[0230] In some possible implementations, at least one of the first arcuate wall 171 and the second arcuate wall 172 has a support 8 disposed on the surface facing the other.

[0231] The connector 5 includes a connecting platform 51 and a plug-in portion 52 connected to the connecting platform 51. A portion of the plug-in portion 52 is inserted into the proximal cavity segment 11a of the central cavity 11, and another portion is inserted into the proximal end of the air guide cavity 17.

[0232] At least a portion of the conduit 1 is pre-bent, the hardness of the insertion part 52 is greater than the hardness of the conduit 1, and the hardness of the conduit 1 is greater than the hardness of the sealing seat 2.

[0233] The insertion part 52 has a core cavity 52a, and the core cavity 52a, the central cavity 11 and the sealing seat cavity 2b are connected in sequence to form an endoscope channel 100a.

[0234] The insertion part 52 also has a venting cavity 52b, and the connecting platform 51 has a venting connector 511. The venting connector 511 forms a connector cavity 511a. The connector cavity 511a, the venting cavity 52b and the air guide cavity 17 are connected in sequence to form a venting channel 100b.

[0235] The distal end of the video channel 100c extends into the mask cavity 2a. In one possible implementation, the laryngeal mask 100 includes a flexible tube 6. The distal end of the video channel 100c is formed by the flexible tube 6. The distal end face of the flexible tube 6 is formed as a light-transmitting blind end 6a, and the flexible tube 6 can bend and reset synchronously with the video tube.

[0236] The image channel 100c is used for insertion and removal with the image tube of the imaging device. An image sensor is installed at the distal end of the image tube. The image sensor can obtain light through the light-transmitting blind end 6a to achieve imaging. After the image tube is inserted into the image channel 100c, the image channel 100c can be controlled to bend and reposition itself along with the distal end of the image tube, avoiding obstruction of the distal end of the image tube by tissues such as the patient's larynx or epiglottis.

[0237] The central cavity 11 includes a proximal cavity segment 11a and a distal cavity segment 11b connected to the proximal cavity segment 11a. The proximal cavity segment 11a forms two first grooves 12. The light guide 31 is disposed in one of the first grooves 12, and the suction / rinsing tube 32 is disposed in the other first groove 12. The first grooves 12 are open toward the central cavity 11, and a portion of the circumferential outer surface of the insertion part 52 covers the open portion of the first groove 12.

[0238] The distal cavity segment 11b of the central cavity 11 forms two second grooves 13 corresponding to the two first grooves 12, and the openings of the second grooves 13 communicate with the limiting grooves 14. Two through holes are formed inside the cavity wall of the central cavity 11, and the first grooves 12 and the corresponding second grooves 13 are connected through the corresponding through holes.

[0239] In the radial section of the laryngeal mask 100, the central cavity 11 is circular or nearly circular, and the viewing cavity is circular or nearly circular. The line connecting the geometric center of the central cavity 11 and the geometric center of the viewing cavity is used as a reference line. The two first grooves 12 are arranged approximately symmetrically with respect to the reference line. The minimum distance from any point on the first groove 12 to the reference line is less than the shortest radius of the central cavity 11. When a perpendicular line is drawn from any point on the first groove 12 to the reference line, the intersection of the perpendicular line and the reference line is located between the geometric center of the central cavity 11 and the geometric center of the viewing channel 100c.

[0240] Similarly, in the radial section of the laryngeal mask 100, the second groove 13 includes a first part 13a and a second part 13b that are interconnected. The second part 13b connects the first part 13a and the limiting groove 14. The first part 13a is circular or near-circular.

[0241] Specifically, the catheter 1 includes two flanges 15. The outer surface of the wall of the distal segment 11b has a recessed mating surface 16. The two flanges 15 are located on opposite sides of the recessed mating surface 16 in the peripheral direction of the catheter 1 and are spaced apart. The two flanges 15 extend from the proximal end to the distal end of the wall of the distal segment 11b. The ends of the two flanges 15 facing each other are spaced apart and define a limiting groove 14 with the recessed mating surface 16. The inner surface of the flanges 15 facing the recessed mating surface 16 is spaced apart from the recessed mating surface 16 and defines a second groove 13. In the radial section of the laryngeal mask 100, the outer surface of the catheter 1 on the side near the viewing channel 100c has a first arc, and the outer surfaces of the two flanges 15 are located on the first arc.

[0242] In actual production, a conduit 1 containing a first groove 12 and a second groove 13 can be obtained by injection molding. During assembly, the light guide 31 and the suction / rinsing tube 32 can be respectively inserted into the second groove 13 and the first groove 12. Then, the insertion part 52 is inserted into the proximal cavity segment 11a of the central cavity 11. Then, the proximal end of the light guide 31 and the proximal end segment of the suction / rinsing tube 32 are fixed to the insertion part 52. Next, the image channel tube 4 can be fixed to the limiting groove 14 to realize the connection between the image channel tube 4 and the conduit 1. As one possible implementation, when the conduit 1 is manufactured by injection molding, the mold core used for molding the first groove 12 can be pulled together with other mold cores (such as mold cores used for molding through holes, the proximal cavity segment 11a of the central cavity 11, and the proximal part of other functional cavities) towards the proximal end of the conduit 1 to form the above-mentioned cavities and holes. The integral mold core used for forming the second groove 13 and the limiting groove 14 can be pulled out toward the distal end of the guide tube 1 together with other mold cores (e.g., mold cores used for forming the distal portions of the distal cavity 11b of the central cavity 11 and other functional cavities) to form the aforementioned cavity and groove. In this embodiment, the central axes of the through hole and the corresponding second groove 13 can be approximately parallel to the central axis of the central cavity 11, and the cross-sectional area of ​​the first groove 12 is not less than the cross-sectional area of ​​the through hole.

[0243] In another possible implementation, when the catheter 1 is also manufactured using injection molding, the mold core used for forming the first groove 12 can be pulled out together with other mold cores (e.g., mold cores used for forming the proximal portion of the central cavity 11 proximal segment 11a and other functional cavities) toward the proximal end of the catheter 1 to form the aforementioned cavity. The integral mold core used for forming the second groove 13 and the limiting groove 14 can be pulled out together with other mold cores (e.g., mold cores used for forming the through hole, the distal portion of the central cavity 11b, and other functional cavities) toward the distal end of the catheter 1 to form the aforementioned cavity, groove, and hole. In this implementation, the central axis of the through hole and the central axis of the second groove 13 are respectively substantially parallel to the central axis of the distal portion of the central cavity 11b, or the central axis of the through hole and the central axis of the second groove 13 are extensions of each other, and the line formed by the central axis of the through hole and the corresponding central axis of the second groove 13 is substantially parallel to the central axis of the distal portion of the central cavity 11b.

[0244] The proximal end of the light guide 31 is fixed to the connecting platform 51, and the distal end is fixed to the flexible tube 6. Alternatively, the distal end of the light guide 31 may be fixed to the sealing seat 2. In some other embodiments, the light guide 31 is fixed to the connecting platform 51, and the proximal end of the light guide 31 extends beyond the connecting platform 51 in a direction away from the conduit 1.

[0245] The proximal end of the suction / rinsing tube 32 is provided with an external device interface and a cover 321, which is used to open or close the lumen of the suction / rinsing tube 32. The distal end of the suction / rinsing tube 32 is connected to the shroud 2a.

[0246] In one possible implementation, the suction / rinsing tube 32 extends into the shroud cavity 2a and is fixed relative to the sealing seat 2. The suction / rinsing tube 32 has at least one opening at its end and / or distal sidewall, thereby enabling communication between the distal end of the suction / rinsing tube 32 and the shroud cavity 2a.

[0247] In another possible implementation, an extension cavity (not shown in the figure) is formed within the sealing seat 2. The extension cavity has at least one opening at its end and / or distal sidewall, through which it communicates with the cover cavity 2a. The proximal end of the extension cavity is sealed to the distal end of the suction / rinsing tube 32, thus establishing communication between the extension cavity and the suction / rinsing tube 32. This achieves communication between the distal end of the suction / rinsing tube 32 and the cover cavity 2a.

[0248] As another possible implementation, the suction / rinsing tube 32 is connected to the hose 6.

[0249] In some possible implementations, the cavity wall of the cover cavity 2a protrudes to form a baffle 21. The baffle 21 is located on the distal side of the hose 6 and is spaced apart from the hose 6. When the hose 6 is in the reset state, in the orthographic projection along the extension direction of the hose 6, the projection of the baffle 21 and the projection of the blind end 6a partially overlap along the first direction. Alternatively, the distance between the projection of the baffle 21 and the projection of the blind end 6a along the first direction does not exceed 10 mm. The first direction is the distribution direction of the endoscope channel 100a and the ventilation channel 100b.

[0250] The cavity 2a has a bottom wall 22 and a first side wall 23 and a second side wall 24 disposed opposite to each other along a first direction. The first side wall 23 and the second side wall 24 are connected to the bottom wall 22. The first side wall 23 is disposed adjacent to the hose 6. A baffle 21 is disposed on the first side wall 23. The baffle 21 has a first end 21a and a second end 21b disposed opposite to each other. The first end 21a is connected to the bottom wall 22. The baffle 21 has a guide slope 21c disposed away from the hose 6. Along the direction from the end away from the first side wall 23 to the end close to the first side wall 23, the guide slope 21c is inclined toward the side where the hose 6 is located. The end face of the second end 21b of the baffle 21 is flush with or lower than the ventral end face of the sealing seat 2.

[0251] The first end of the fixing strap 7 is fixed relative to the connecting platform 51, thereby achieving relative fixation with the conduit 1. The second end is detachably connected to the connecting platform 51. The second end of the fixing strap 7 is provided with a plurality of insertion holes 7a distributed along the length direction of the fixing strap 7. A T-shaped insert 512 is formed on the connecting platform 51. The T-shaped insert 512 can be inserted into any one of the insertion holes 7a to achieve a detachable connection between the fixing strap 7 and the connecting platform 51.

[0252] In the description of this application, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the embodiments of this application. In this application, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Furthermore, without contradiction, those skilled in the art can combine different embodiments or examples described in this application, as well as features of different embodiments or examples.

[0253] The above are merely preferred embodiments of this application and are not intended to limit the scope of this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of protection of this application.

Claims

1. A laryngeal mask airway, characterized in that, The laryngeal mask airway forms an endoscope channel and a ventilation channel, the laryngeal mask airway comprising: A catheter having a central lumen that at least forms a portion of the structure of the endoscope channel; A sealing seat is disposed at the distal end of the conduit, and a ventral cavity is formed on the ventral side of the sealing seat, the ventral cavity being part of the ventilation channel; and One or more functional components, wherein the central cavity includes a proximal cavity segment, the cavity wall of the proximal cavity segment forming one or more first grooves, the first grooves extending along the extension direction of the catheter and opening toward the central cavity, and at least a portion of the structure of at least one of the functional components is disposed in the first groove.

2. The laryngeal mask according to claim 1, characterized in that, The functional components include a suction / rinsing tube, and / or a light guide, and / or a viewing device; At least a portion of the suction / rinsing tube, and / or the light guide, and / or the image sensor is disposed in the first groove and extends into the cover cavity.

3. The laryngeal mask according to claim 2, characterized in that, The laryngeal mask includes a connector, the connector including a connecting platform and an insertion part connected to the connecting platform, the insertion part being inserted into the proximal cavity segment, the insertion part having a core cavity communicating with the central cavity, the core cavity extending through the insertion part along the extension direction of the catheter; Part of the outer peripheral surface of the plug portion covers the opening of the first groove.

4. The laryngeal mask according to claim 2, characterized in that, The central cavity includes a distal cavity connected to the proximal cavity segment. The wall of the distal cavity segment forms one or more second grooves extending along the extension direction of the catheter. Each second groove communicates with a corresponding first groove. A portion of the functional component is disposed in the second groove.

5. The laryngeal mask according to claim 4, characterized in that, The central axis of the second groove is approximately parallel to the central axis of the central cavity.

6. The laryngeal mask according to claim 5, characterized in that, The second groove is open to the outer surface of the cavity wall of the distal cavity segment, and the cavity wall of the central cavity is formed with at least one through hole, the through hole penetrating the cavity wall of the central cavity, and the through hole connecting the first groove and the corresponding second groove.

7. The laryngeal mask according to claim 6, characterized in that, The radial cross-sectional area of ​​the through hole is not greater than the radial cross-sectional area of ​​the first groove.

8. The laryngeal mask according to claim 6, characterized in that, The central axis of the through hole and the central axis of the second groove are respectively approximately parallel to the central axis of the distal cavity segment; or... The central axis of the through hole and the central axis of the second groove are extensions of each other, and the line formed by the central axis of the through hole and the central axis of the second groove is approximately parallel to the central axis of the distal cavity segment.

9. The laryngeal mask airway according to any one of claims 1-8, characterized in that, The functional component includes a viewing element, which is a viewing tube. The laryngeal mask forms a viewing channel, and at least a portion of the viewing tube is disposed within the viewing channel. The central cavity is isolated from the viewing channel. In the radial cross-section of the proximal cavity segment, the central cavity is circular or nearly circular, and the viewing channel is circular or nearly circular. The line connecting the geometric center of the central cavity and the geometric center of the viewing channel is used as a reference line. The shortest distance from any point on the first groove to the reference line is less than the shortest radius of the central cavity.

10. The laryngeal mask according to claim 9, characterized in that, On the radial cross-section of the proximal cavity segment, any point on the first groove lies outside the reference line; and / or A perpendicular line is drawn from any point on the first groove to the reference line, and the intersection of the perpendicular line and the reference line is located between the geometric center of the central cavity and the geometric center of the viewing channel.

11. The laryngeal mask according to claim 10, characterized in that, The outer surface of the catheter is recessed inward to form a limiting groove, which extends from the proximal end of the catheter to the distal end of the catheter. The laryngeal mask includes a viewing channel tube, and the space inside the viewing channel tube is formed as at least a part of the viewing channel. A part of the viewing channel tube is located within the limiting groove.

12. The laryngeal mask according to claim 11, characterized in that, The central cavity includes a distal cavity segment connected to the proximal cavity segment, the cavity wall of the distal cavity segment forming one or more second grooves extending along the extension direction of the catheter, the opening of the second groove communicating with the limiting groove.

13. The laryngeal mask according to claim 12, characterized in that, In the radial section of the distal cavity, the second groove includes a first part and a second part that are interconnected, the second part connecting the first part and the limiting groove, wherein the first part is circular or near-circular.

14. The laryngeal mask according to claim 12, characterized in that, The catheter includes two flanges, and the outer surface of the wall of the distal segment has a recessed mating surface. The two flanges are located on opposite sides of the recessed mating surface in the peripheral direction of the catheter and are spaced apart. The two flanges extend from the proximal end to the distal end of the wall of the distal segment. The ends of the two flanges facing each other are spaced apart and define the limiting groove with the recessed mating surface. The inner surface of the flange facing the recessed mating surface is spaced apart from the recessed mating surface and defines the second groove.

15. The laryngeal mask according to claim 14, characterized in that, In the radial section of the distal cavity, the outer surface of the conduit on the side near the visual channel tube has a first arc, and the outer surfaces of the two flanges are located on the first arc.

16. The laryngeal mask airway according to any one of claims 1-8, characterized in that, The conduit has an air-guiding cavity located on one side of the central cavity, and the air-guiding cavity forms at least a part of the structure of the ventilation channel.

17. The laryngeal mask according to claim 16, characterized in that, The laryngeal mask includes at least one support body that protrudes from the inner surface of the cavity wall of the air delivery chamber and extends along the extension direction of the duct.

18. The laryngeal mask according to claim 17, characterized in that, At least one of the supports protrudes from the inner surface of the air guide cavity on one side along a first direction, the first direction being the distribution direction of the air passage and the endoscope passage.

19. The laryngeal mask according to claim 18, characterized in that, At least one of the supports protrudes from one inner surface of the air guide cavity along the first direction and is spaced apart from the other inner surface of the air guide cavity along the first direction.

20. The laryngeal mask according to claim 17, characterized in that, The catheter has a first arc-shaped wall and a second arc-shaped wall arranged opposite each other along a first direction, the first direction being the distribution direction of the ventilation channel and the endoscope channel. The first arc-shaped wall and the second arc-shaped wall surround and form at least a portion of the air guiding cavity. The first arc-shaped wall is located on the side of the second arc-shaped wall away from the central cavity. Both the circumferential ends of the first arc-shaped wall and the circumferential ends of the second arc-shaped wall are curved toward the central cavity, and the curvature of the first arc-shaped wall is greater than the curvature of the second arc-shaped wall. The support body is disposed on the surface of at least one of the first arc-shaped wall and the second arc-shaped wall facing the other.

21. The laryngeal mask according to claim 16, characterized in that, The laryngeal mask includes a connector, the connector including a connecting platform and a plug portion connected to the connecting platform, the plug portion having an air chamber communicating with the air delivery chamber, and the air chamber forming part of the air passage, a portion of the cavity wall of the air chamber being inserted into the proximal end of the air delivery chamber.

22. The laryngeal mask according to claim 21, characterized in that, The connection platform has a vent connector, which forms a connector cavity. The connector cavity, the vent cavity, and the air guide cavity are sequentially connected to form at least a portion of the vent channel.

23. The laryngeal mask according to claim 22, characterized in that, The connector has a core cavity that communicates with the central cavity. The central axis of the connector cavity is coplanar with the central axis of the core cavity, and the central axis of the connector cavity intersects with the central axis of the core cavity.

24. The laryngeal mask airway according to any one of claims 1-8, characterized in that, The functional component includes a suction / rinsing tube, the proximal end of which is provided with an external device interface and a cover, the cover being used to open or close the lumen of the suction / rinsing tube.

25. The laryngeal mask according to claim 24, characterized in that, The suction / rinsing tube extends into the cavity of the cover, and its distal end is fixed relative to the sealing seat. The suction / rinsing tube has at least one opening at its end and / or on its distal sidewall.

26. The laryngeal mask according to claim 24, characterized in that, An extension cavity is formed within the sealing seat. The end and / or distal sidewall of the extension cavity has at least one opening. The extension cavity communicates with the cover cavity through the opening. The proximal end of the extension cavity is sealed to the distal end of the suction / rinsing tube, thereby connecting the extension cavity with the suction / rinsing tube.

27. The laryngeal mask according to claim 9, characterized in that, The functional component includes a suction / rinsing tube, the distal end of which is connected to the channel wall at the distal end of the video channel, or the distal end of which is fixed relative to the sealing seat.

28. The laryngeal mask according to claim 9, characterized in that, The functional component includes a light guide, the distal end of which is connected to the channel wall at the distal end of the video channel, or the distal end of which is fixed relative to the sealing seat.

29. The laryngeal mask according to claim 9, characterized in that, The laryngeal mask airway includes a flexible tube, the distal end of which forms the channel wall. The distal end face of the flexible tube is formed as a light-transmitting blind end. When the viewing tube is controlled to bend and return to its original position, the flexible tube can bend and return synchronously with the viewing tube. The functional component includes a suction / rinsing tube and / or a light guide, the distal end of the suction / rinsing tube and / or the distal end of the light guide being connected to the flexible tube.

30. The laryngeal mask according to claim 29, characterized in that, The cavity wall of the cover cavity protrudes to form a baffle rib. The baffle rib is located on the far side of the hose and is spaced apart from the hose. When the hose is in the reset state, in the orthographic projection along the extension direction of the hose, the projection of the baffle rib and the projection of the blind end partially overlap along a first direction, or the distance between the projection of the baffle rib and the projection of the blind end along the first direction does not exceed 10 mm. The first direction is the distribution direction of the ventilation channel and the endoscope channel.

31. The laryngeal mask according to claim 30, characterized in that, The cavity has a bottom wall and a first side wall and a second side wall disposed opposite to each other along the first direction. The first side wall and the second side wall are connected to the bottom wall. The first side wall is disposed adjacent to the hose. The baffle is disposed on the first side wall. The baffle includes a first end and a second end disposed opposite to each other. The first end is connected to the bottom wall.

32. The laryngeal mask according to claim 31, characterized in that, The baffle has a flow-guiding slope that is away from the hose, and the flow-guiding slope is inclined toward the side where the hose is located along the direction from the end away from the first sidewall to the end close to the first sidewall.

33. The laryngeal mask airway according to claim 30, characterized in that, The end face of the second end is flush with or lower than the ventral end face of the sealing seat.

34. The laryngeal mask airway according to any one of claims 1-8, characterized in that, At least a portion of the conduit is pre-bent.

35. The laryngeal mask according to claim 34, characterized in that, The laryngeal mask includes a connector, which includes a connecting platform and an insertion part connected to the connecting platform. The insertion part is inserted into the proximal cavity segment. The hardness of the insertion part is greater than the hardness of the catheter, and the hardness of the catheter is greater than the hardness of the sealing seat.

36. The laryngeal mask according to claim 35, characterized in that, The insertion part has a core cavity communicating with the central cavity. The core cavity extends through the insertion part along the extension direction of the catheter. A sealing seat cavity is formed on the back side of the sealing seat. The ventral side of the sealing seat cavity is closed and the back side is at least partially open. The core cavity, the central cavity, and the sealing seat cavity are connected in sequence to form the endoscope channel.

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