Laryngeal mask and laryngeal mask main body and video device thereof

Abstract

The embodiment of the utility model provides a laryngeal mask and a laryngeal mask body and a video device thereof, the laryngeal mask comprises the laryngeal mask body and the video device, the video device comprises a control part and a video tube, and the video tube is connected with the control part and can be bent and reset under the control of the control part; the laryngeal mask body comprises a catheter provided with a first cavity; the sealing seat is connected to the far end of the catheter; the near end of the hose is connected to the far end of the catheter, a light-transmitting blind end is formed at the far end of the hose, the hose is provided with a second cavity channel, the second cavity channel is communicated with the first cavity channel so that a video cavity channel used for containing the video tube can be formed, the video tube can be inserted into the video cavity channel in a pluggable mode, and the hose can be synchronously bent and reset along with the video tube. Wherein at least one limiting part is formed on the catheter and / or the hose, and the limiting part is used for limiting relative movement after the far end of the video tube is inserted into the hose. According to the laryngeal mask, a good image can be obtained in the bending and resetting process of the video tube.

Description

Technical Field

[0001] The embodiments of the present application relate to the technical field of medical devices, and in particular to a laryngeal mask and a laryngeal mask body and a video device. Background Art

[0002] As a supraglottic ventilation device, the laryngeal mask is an artificial airway. Since its invention in 1983, it has been widely used in clinical practice due to its advantages such as easy operation, high success rate and little damage. The laryngeal mask is an artificial airway device between a mask and an endotracheal tube, which can allow patients to maintain spontaneous breathing and implement positive pressure ventilation.

[0003] Laryngeal masks without visual functions are usually blindly inserted into the patient's body. Since the details of the throat cannot be seen during operation, the operator can only blindly insert it based on feel and experience. Blind insertion is likely to lead to inaccurate placement of the laryngeal mask. Inaccurate positioning may lead to a series of subsequent problems, such as failure to effectively isolate the respiratory tract and digestive tract, resulting in incomplete sealing of the laryngeal mask, air leakage, bloating, reflux, and even aspiration in the patient. When one or more of the above problems occur, the operator has to readjust the angle of the laryngeal mask in the patient's body or insert it repeatedly, which may prolong the operation time and delay the rescue of critically ill patients. Multiple attempts to insert may also cause an increase in the patient's oral mucus, making the operation more difficult.

[0004] In order to ensure the accuracy of the laryngeal mask insertion position, operators often use various indirect means to check, such as observing chest rise and fall, lung compliance, auscultation for leaks, observing neck bulge, monitoring PetC02 (end-tidal carbon dioxide partial pressure), mouth opening observation, etc., but in actual operation, various indirect inspection methods play an important role, but because of the inherent limitations of the indirect method itself, there is a risk of misjudgment. Therefore, when necessary, it is necessary to use a visual soft mirror for inspection directly. There are also some problems with the direct use of a visual soft mirror, such as cumbersome disinfection of the visual soft mirror, high cost of use, and failure to achieve full visualization of the laryngeal mask insertion process to reduce repeated insertion of the laryngeal mask.

[0005] In view of this, it is necessary to realize the visual function of the laryngeal mask itself, and a series of video laryngeal mask designs have emerged. As an example, in the related art, the video laryngeal mask is equipped with a video tube, and the distal end of the video tube is equipped with an image sensor. The video tube is inserted into the video cavity with a transparent window of the laryngeal mask, thereby realizing the visualization of the laryngeal mask and avoiding direct contact between the video tube and the patient. Further, the video laryngeal mask is equipped with a light source, and the light source is arranged at the distal end of the video tube to provide illumination for the observed area. Alternatively, the video laryngeal mask is equipped with a light source and a light guide, and the light source is arranged at the proximal end or other position of the video tube, and the light guide is arranged in the video tube, and the light emitted by the light source is injected from the proximal end of the light guide and emitted from the distal end of the light guide, and the distal end of the light guide extends to the distal end of the video tube to provide illumination for the observed area.

[0006] During the process of inserting the laryngeal mask into a patient, in order to prevent the epiglottis or tissues around the larynx of the patient from blocking the image sensor, the video tube is set to be controllably bendable and resetable. However, during the adjustment process, a gap is likely to appear between the distal end face of the video tube and the transparent window. Moreover, during the insertion process of the laryngeal mask, it is necessary to adjust the bending curvature of the laryngeal mask catheter according to the differences in the airway anatomical structures of different patients and the characteristics of each doctor's technique. Such adjustments are also likely to cause a gap to appear between the distal end face of the video tube and the inner surface of the transparent window.

[0007] The existence of the above gap is likely to cause some of the light emitted from the light source or the distal end of the light guiding member to hit the inner surface of the window and be reflected to the image sensor, thereby generating a problem of light reflection, which may lead to halos, light spots, or even large areas of high brightness in the image, thus possibly seriously affecting the image quality. Summary of the Invention

[0008] In view of this, an embodiment of the present application expects to provide a laryngeal mask, its laryngeal mask body, and a video imaging device that can keep the distal end of the video tube closely attached to the transparent window as much as possible during the bending and resetting process of the video tube.

[0009] A first aspect of an embodiment of the present application provides a laryngeal mask, which includes a laryngeal mask body and a video imaging device. The video imaging device includes a control part and a video tube. The video tube is connected to the control part and can be bent and reset under the control of the control part. The laryngeal mask body includes: a catheter having a first channel; a sealing seat connected to the distal end of the catheter; and a flexible tube. The proximal end of the flexible tube is connected to the distal end of the catheter, and a light-transmitting blind end is formed at the distal end of the flexible tube. The flexible tube has a second channel, and the second channel communicates with the first channel to form a video channel for accommodating the video tube. The video tube is insertably and removably inserted into the video channel. At least part of the structure of the flexible tube is located within the sealing seat, and the flexible tube can bend and reset synchronously with the video tube. Wherein, at least one limiting part is formed on the catheter and / or the flexible tube, and the limiting part is used to limit the relative movement of the distal end of the video tube after it is inserted into the flexible tube.

[0010] In some embodiments, the distal end of the flexible tube is attached to the video tube.

[0011] In some embodiments, the proximal end of the flexible tube is in clearance fit with the video tube.

[0012] In some embodiments, the video tube includes a bendable section and a video section. The video section is connected to the distal end of the bendable section. The bendable section can be bent and reset under the control of the control part. Wherein, the video section and at least part of the bendable section are inserted into the flexible tube, and the distal end face of the video section is attached to the light-transmitting blind end.

[0013] In some embodiments, the video device includes a light source disposed at the distal end of the video tube. Alternatively, the video device includes a light source and a light guide. The light source is disposed at the proximal end of the video tube, and the light guide is disposed within the video tube. Light emitted by the light source enters from the proximal end of the light guide, and the distal end of the light guide extends to the distal end of the video tube.

[0014] In some embodiments, the limiting portion includes a first step formed by a protrusion on the inner surface of the flexible hose and / or the catheter. A side surface of the first step facing the light-transmitting blind end portion is formed as a first abutting surface for abutting against the video tube.

[0015] In some embodiments, a second step is formed by a protrusion on the outer surface of the video tube. A side surface of the second step facing the proximal end of the video tube is formed as a second abutting surface for abutting against the first abutting surface.

[0016] In some embodiments, at least one of the first step and the second step is a flexible structure. When the video tube is inserted into the video cavity and the flexible hose, the first step and / or the second step can elastically deform so that the second step can slide from the proximal side of the first step to the distal side of the first step, enabling the second abutting surface to abut against the first abutting surface.

[0017] In some embodiments, the first step extends along the circumferential direction of the flexible hose or the catheter to form a closed ring structure. Alternatively, the limiting portion includes a plurality of the first steps, and the plurality of first steps are circumferentially distributed along the flexible hose or the catheter.

[0018] In some embodiments, a side surface of the first step facing away from the light-transmitting blind end portion is formed as a first guiding surface. The proximal end of the first guiding surface extends to the inner surface of the flexible hose or the catheter, and the distal end extends to the first abutting surface.

[0019] In some embodiments, the outer edge of the first step has an arc chamfer.

[0020] In some embodiments, the first abutting surface is inclined in a direction from the outer edge to the inner edge away from the light-transmitting blind end portion.

[0021] In some embodiments, the proximal end of the hose has a socket section, and the distal end of the catheter has a connection section communicating with the video channel. Alternatively, the proximal end of the hose has a connection section, and the distal end of the catheter has a socket section communicating with the video channel. The socket section is sleeved on the outer surface of the connection section, and the first step is formed on the inner surface of the connection section. Alternatively, the first step is formed on one side of the connection section close to the hose or the catheter.

[0022] In some embodiments, the surface of one side of the second step facing the distal end of the video tube is formed as a second guiding surface, and the proximal end of the second guiding surface extends to the second abutting surface, and the distal end extends to the outer surface of the video tube.

[0023] In some embodiments, the second step extends along the circumferential direction of the video tube to form a closed annular structure. Alternatively, the number of the second steps is multiple, and the multiple second steps are distributed along the circumferential direction of the video tube.

[0024] In some embodiments, the proximal end of the video tube is fixedly connected to the proximal end of the catheter, and the effective length of the video tube inserted into the video channel is greater than the effective length of the video channel.

[0025] In some embodiments, the video device includes a housing, the control unit is connected to the housing, a connecting member is provided at the proximal end of the catheter, and the housing is detachably and fixedly connected to the connecting member.

[0026] In some embodiments, the lower part of the housing has a laterally extending connecting platform on one side or both sides, a clamping structure provided at the bottom of the connecting platform, and a pressing part provided on the lateral outer side of the connecting platform. The pressing part is drivingly connected to the clamping structure. A clamping groove cooperating with the clamping structure is formed on the upper surface of the connecting member, and the pressing part can drive the clamping structure to lock and unlock with the clamping groove.

[0027] In some embodiments, the proximal end of the video tube and the proximal end of the catheter can move relative to each other.

[0028] The second aspect of an embodiment of the present application provides a laryngeal mask body, comprising: a catheter having a first cavity; a sealing seat connected to the distal end of the catheter; and a hose, the proximal end of the hose is connected to the distal end of the catheter and the distal end of the hose is formed with a light-transmitting blind end, the hose has a second cavity, the second cavity is connected to the first cavity to form a video cavity for accommodating a video tube, the video tube is pluggable into the video cavity, at least part of the structure of the hose is located in the sealing seat, and the hose can bend and reset synchronously with the video tube, wherein the catheter and / or the hose is formed with at least one limiting portion, the limiting portion is used to limit the relative movement of the distal end of the video tube after being inserted into the hose.

[0029] A third aspect of an embodiment of the present application provides a video device of a laryngeal mask, which is applied to a laryngeal mask body, the video device comprising: a control unit; a video tube, the video tube being connected to the control unit and being able to bend and reset under the control of the control unit, the laryngeal mask body comprising a catheter and a hose, the catheter having a first cavity, the proximal end of the hose being connected to the distal end of the catheter and the distal end of the hose being formed with a light-transmitting blind end, the hose having a second cavity, the second cavity being connected to the first cavity to form a video cavity for accommodating the video tube, the video tube being pluggable and inserted into the video cavity, the hose being able to bend and reset synchronously with the video tube, wherein the outer surface of the video tube is raised to form a second step, the side surface of the second step facing the proximal end of the video tube is formed as a second abutment surface, the second abutment surface being used to abut against a limiting portion of the catheter and / or the hose to limit the relative movement of the distal end of the video tube after being inserted into the hose.

[0030] The laryngeal mask and its laryngeal mask body and video device of the embodiment of the present application can keep the distal end of the video tube in close contact with the inner surface of the light-transmitting blind end of the hose as much as possible during the bending and resetting of the video tube, thereby obtaining a better image. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 A schematic diagram of a laryngeal mask according to an embodiment of the present application;

[0032] Figure 2 This is a schematic diagram of a usage scenario of a laryngeal mask according to an embodiment of the present application;

[0033] Figure 3 This is a schematic structural diagram of the laryngeal mask body and the video device after being separated according to an embodiment of the present application;

[0034] Figure 4 A partial cross-sectional schematic diagram of a video tube according to an embodiment of the present application;

[0035] Figure 5Schematic cross-sectional view of the video tube of the laryngeal mask according to the embodiment of the present application in an unbent state;

[0036] Figure 6 is Figure 5 an enlarged schematic view of part A in;

[0037] Figure 7 Schematic cross-sectional view of the video tube of the laryngeal mask according to the embodiment of the present application in a bent state;

[0038] Figure 8 is Figure 7 an enlarged schematic view of part B in;

[0039] Figure 9 Schematic diagram of the process of inserting the video tube into the hose according to the embodiment of the present application.

[0040] Explanation of reference numerals

[0041] 1. Video device; 11. Control unit; 111. First steel wire; 112. Second steel wire; 12. Video tube; 121. Second step; 1211. Second abutting surface; 1212. Second guiding surface; 122. Video section; 123. Bendable section; 13. Housing; 131. Connection platform; 132. Pressing part; 2. Laryngeal mask body; 2a. Video cavity; 21. Duct; 211. First cavity; 212. Connection section; 213. Gas conduction channel; 22. Sealing seat; 23. Hose; 231. Light-transmitting blind end part; 232. Socket section; 233. Second cavity; 24. Limiting part; 241. First step; 2411. First abutting surface; 2412. First guiding surface; 25. Connecting piece. Detailed implementation manners

[0042] In order to make the objectives, technical solutions and advantages of the present utility model clearer, the present utility model 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 only used to explain the present utility model and are not used to limit the present utility model.

[0043] In the various specific technical features described in the specific embodiments, they can be combined in any suitable manner without conflict. For example, different embodiments and technical solutions can be formed by combining different specific technical features. To avoid unnecessary repetition, various possible combinations of the specific technical features in the present utility model will not be described separately.

[0044] In the following description, the terms "first", "second", etc. only distinguish different objects and do not indicate any sameness or connection between the objects. It should be understood that the orientation descriptions such as "above", "below", "outside", and "inside" are the orientations shown in the accompanying drawings of the specification, and the "left" and "right" directions represent the left and right directions shown in the specific corresponding schematic diagrams.

[0045] It should be noted that the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, such that a process, method, article or device comprising a series of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "comprising one..." does not exclude the presence of additional identical elements in the process, method, article or device comprising that element. "Plurality" means greater than or equal to two.

[0046] In the embodiments of the present application, "proximal end" refers to the direction close to the operator, and "distal end" refers to the direction away from the operator.

[0047] Embodiments of the present application provide a laryngeal mask. Please refer to Figures 1-5 , the laryngeal mask includes a laryngeal mask body 2 and a video imaging device 1.

[0048] The video imaging device 1 can be used to provide visual guidance during the insertion process and judge the alignment situation after the laryngeal mask is inserted, and can also provide a visual reference for the relative position of the laryngeal mask for the operation of inserting other instruments through the laryngeal mask. The video imaging device 1 includes a control unit 11 and a video imaging tube 12. The video imaging tube 12 is connected to the control unit 11 and can be bent and reset under the control of the control unit 11.

[0049] As an example, the video imaging tube 12 can be in the shape of a slender tube. Its distal end can be configured with an image sensor, and a cable can be configured inside. The cable can transmit the image signal collected by the image sensor to a display, so as to present the image to the operator. It should be noted that in some embodiments, the video imaging device 1 can include a display, and the display can be connected to the proximal end of the video imaging tube 12. In other embodiments, the video imaging device 1 may not include a display, and the video imaging tube 12 can be connected to an external display device through wireless communication or through an internally configured cable to transmit the image signal collected by the image sensor to the display device for display.

[0050] Please refer to Figure 4, the control unit 11 may include a power assembly, a first wire 111, and a second wire 112. The first wire 111 and the second wire 112 may be threaded through the video tube 12. The proximal ends of both may be drivingly connected to the power assembly. The distal end of the first wire 111 may be connected to the inner top of the distal end of the video tube 12, and the distal end of the second wire 112 may be connected to the inner bottom of the distal end of the video tube 12. When upward bending is required, the power assembly curls the first wire 111 to shorten the effective length of the first wire 111 and releases the second wire 112, thereby driving the distal end of the video tube 12 to bend upward. When resetting is required, the power assembly curls the second wire 112 to shorten the effective length of the second wire 112 and simultaneously releases the first wire 111, thereby causing the distal end of the video tube 12 to rotate downward to achieve resetting.

[0051] It should be noted that the control unit 11 may also include more wires, such as a third wire and a fourth wire (not shown in the figure), to achieve bending and resetting of the distal end of the video tube in more directions. The specific number and direction of the wires are not limited, and those skilled in the art can flexibly set them according to actual usage requirements.

[0052] It should be noted that the control structure for bending and resetting the distal end of the video tube 12 is not limited to this, and those skilled in the art can improve or replace the above structure according to actual usage requirements and / or with reference to related technologies in this field.

[0053] The laryngeal mask body 2 includes a catheter 21, a sealing seat 22, and a flexible tube 23. The catheter 21 has a first channel 211, and the sealing seat 22 is connected to the distal end of the catheter 21. As an example, the first channel 211 may extend along the length direction of the catheter 21. It may extend from the proximal end of the catheter 21 to the distal end of the catheter 21, or may start extending from a certain position along the length direction of the catheter 21 to the distal end of the catheter 21.

[0054] The proximal end of the flexible tube 23 is connected to the distal end of the catheter 21. The catheter 21 and the flexible tube 23 may be integrally formed, or the catheter 21 and the flexible tube 23 may be connected by post-processing methods, such as being connected to the catheter 21 by means of adhesion, secondary injection molding, etc. The flexible tube 23 has a second channel 233, and the second channel 233 communicates with the first channel 211 to form a video channel 2a. The video tube 12 can be inserted into and removed from the video channel 2a.

[0055] At least part of the structure of the flexible tube 23 is located within the sealing seat 22, and the flexible tube 23 can bend and reset synchronously with the video tube 12. A light-transmitting blind end portion 231 is formed at the distal end of the flexible tube 23. After the video tube 12 is inserted into the video channel 2a, the distal end of the video tube 12 will closely adhere to the light-transmitting blind end portion 231. Part of the diffusely reflected light from the observed area passes through the light-transmitting blind end portion 231, and the image sensor provided at the distal end of the video tube 12 can receive this diffusely reflected light to form an electrical signal.

[0056] The catheter 21 also has an air guide channel 213 extending along the length direction of the catheter 21. The air guide channel 213 communicates with the sealing seat 22, thereby forming a gas exchange channel of the laryngeal mask. The gas exchange channel is isolated from the video cavity 2a to facilitate the formation of better airtightness of the gas exchange channel, so as to facilitate the predictable exchange of gases in the patient's lungs and airway with the external gas, and to prevent the video tube 12 from contacting the air flow in the airway and the patient's tissue, so as to reduce the disinfection and sterilization level after use.

[0057] The specific structure of the catheter 21 is not limited. For example, it can be an integrally formed tube structure, or formed by fixing multiple plastic tube bodies. The catheter 21 can be made of a flexible material and can be preformed with a certain bending angle. The specific bending angle is not limited, and it is advisable to facilitate the insertion operation. Alternatively, the catheter 21 can also be basically straight in the natural state.

[0058] The sealing seat 22 can include an airbag seat and an airbag. Alternatively, the sealing seat 22 can be a structure without an airbag, such as a soft structure made of silica gel and silicone, and this is not limited. The cover cavity of the sealing seat 22 communicates with the air guide channel 213 of the catheter 21. During actual use, the sealing seat 22 can cover the peripheral area around the patient's laryngeal inlet, thereby isolating the patient's respiratory tract and digestive tract. The gas in the air guide channel 213 can enter the patient's respiratory tract through the sealing seat 22 and reach the patient's lungs, thereby establishing a gas exchange channel.

[0059] The video tube 12 can be inserted into the video cavity 2a in a pluggable manner. During actual use, the laryngeal mask body 2 can be disposable, and the video tube 12 can be used as a reusable device in cooperation with different laryngeal mask bodies 2.

[0060] As described above, the second cavity 233 of the flexible tube 23 communicates with the first cavity 211 of the catheter 21, and the distal end of the flexible tube has a light-transmitting blind end 231. That is, the video cavity 2a does not communicate with the patient's airway. Therefore, the video cavity 2a can isolate the video tube 12 from the patient's internal environment, so that the video tube 12 does not directly contact the patient's internal tissue and the gas in the airway, and can be reused after general-level disinfection after the operation without high-level disinfection such as soaking, which is convenient for the reuse of the video tube 12.

[0061] The light-transmitting blind end 231 at the distal end of the flexible tube 23 is provided with a transparent window. Specifically, the transparent window and the flexible tube 23 can be integrally formed, or the transparent window can be hermetically bonded to the flexible tube 23 for connection, and this is not limited here. At least a part of the structure of the flexible tube 23 is located in the sealing seat 22. The flexible tube 23 is made of a flexible material so that it can bend and reset synchronously with the video tube 12. Thus, please refer to Figure 5 and Figure 7During the process of inserting the laryngeal mask, if the visual field of the video tube 12 is blocked, for example, by the patient's epiglottis or laryngeal surrounding tissue, the video tube 12 can be adjusted so that the video tube 12 and the hose 23 are bent together, such as from Figure 5 The state in the bend to Figure 7 The state in the image can eliminate obstructions and obtain a better field of view.

[0062] When the video tube 12 and the hose 23 are bent and reset together, the end of the video tube 12 and the light-transmitting blind end 231 of the hose 23 may move relative to each other, resulting in failure of effective fit between the end surface of the video tube 12 and the inner edge of the light-transmitting blind end 231 .

[0063] Since a light source is usually arranged in the video tube, when the distal end surface of the video tube fails to effectively fit with the video cavity window, that is, when a gap appears between the two, part of the light emitted by the light source may hit the video cavity window and be reflected to the image sensor, thereby causing a reflection problem, resulting in light spots, apertures, and even large areas of highlights in the image, which seriously affects the image quality.

[0064] See also Figures 4-7 In order to solve the above problems, a limiting portion 24 is provided in the catheter 21 and / or the hose 23 of the present embodiment. The limiting portion 24 is used to limit the relative movement of the distal end of the video tube 12 after it is inserted into the hose 23, thereby minimizing the probability of a gap between the distal end of the video tube 12 and the inner surface of the light-transmitting blind end portion 231, thereby improving the imaging quality.

[0065] It should be noted that the relative movement here includes but is not limited to retreat, tangential movement, rotational movement, etc.

[0066] The specific structure of the limiting part 24 is not limited. As an example, the limiting part 24 may be a protruding structure formed in the conduit 21 and / or the hose 23, which can abut against the video tube 12 to limit its retreat after being inserted into the hose 23. The limiting part 24 may be provided only in the conduit 21, or only in the hose 23, or both in the conduit 21 and the hose 23. The relevant parts below will provide several optional structural forms of the limiting part 24, which will not be repeated here.

[0067] The hose 23 may be made of a material with certain flexibility and / or elasticity, including but not limited to polyvinyl chloride (PVC), silicone, etc.

[0068] The distal end of the flexible tube 23 can be attached to the image tube 12. It should be noted that the attachment here should be a relatively tight one. This tight attachment may be caused by the image tube 12 being press-fitted into the flexible tube 23, or may be caused by the image tube 12 and the flexible tube having exactly matching dimensions. The tight attachment of the distal end of the flexible tube 23 to the image tube 12 can reduce the possibility of a gap appearing between the distal end of the image tube 12 and the inner surface of the light-transmitting blind end portion 231, preventing the occurrence of a reflection phenomenon.

[0069] In some embodiments, the proximal end of the flexible tube 23 is in clearance fit with the image tube 12 to facilitate the insertion and removal of the image tube 12 into and from the flexible tube 23. In some other embodiments, the flexible tube is made of a material with good flexibility. At this time, the proximal end of the flexible tube 23 can be attached to the image tube 12. This kind of attachment will neither generate obvious resistance to the bending of the image tube 12, and at the same time helps the tight attachment of the distal end of the flexible tube 23 to the distal end of the image tube 12. As an example, please refer to Figure 6 and Figure 8 , the distal end of the image tube 12 can include a bendable section 123 and an image section 122. The image section 122 can be connected to the distal end of the bendable section 123, and the image sensor is arranged at the distal end of the image section 122.

[0070] The bendable section 123 is provided with a bending assembly that can be controlled to bend and reset, including but not limited to a snake bone, a spring tube, etc. The control unit 11 can control this bending assembly to bend and reset, thereby realizing the control of the distal end of the image tube 12 to bend and reset. For example, the first wire 111 and the second wire 112 (or more wires, such as the third wire and the fourth wire mentioned above) of the control unit 11 can be connected to the bending assembly of the bendable section 123, so that the bendable section 123 can bend and reset under the control of the control unit 11.

[0071] Both the image section 122 and the bendable section 123 are inserted into the flexible tube 23. Among them, the image section 122 is completely inserted into the flexible tube 23, while only a part of the bendable section 123 can be inserted into the flexible tube 23, or it can also be completely inserted into the flexible tube 23. The image section 122 is tightly attached to the flexible tube 23, and the bendable section 123 can be in clearance fit or interference fit with the flexible tube 23.

[0072] In some embodiments, the video imaging device 1 may include a light source (not shown in the figures), which may be disposed at the distal end of the video tube 12. For example, one or more light-emitting diode (LED) light sources may be disposed on one or more sides of the image sensor. Alternatively, the video imaging device 1 may include a light source and a light guide member (not shown in the figures). The light source may be disposed at the proximal end of the video tube 12, and the light guide member may be disposed within the video tube 12. The proximal end face of the light guide member may face the light source to ensure that sufficient light can enter the light guide member from the proximal end face of the light guide member. The distal end of the light guide member extends to the distal end of the video tube 12, enabling the light to emit from the distal end of the video tube 12. In this way, during actual use, the light source will be outside the patient's body, enhancing the safety of use. Obviously, the method of providing a light source for the video tube 12 is not limited to this. For example, an external light source may also be used, or the light guide member may not be disposed within the video tube 12, but may be disposed in a light guide channel independent of the video cavity 2a in the catheter 21 / catheter 21 and the flexible tube 23, etc.

[0073] In some embodiments, referring to Figure 5 and Figure 7 , the above-mentioned limiting portion 24 may include at least one first step 241 formed by a protrusion on the inner surface of the flexible tube 23 and / or the catheter 21. A first abutting surface 2411 is formed on one side surface of the first step 241 facing the light-transmitting blind end portion 231, and the first abutting surface 2411 is used to abut against the video tube 12. As an example, the first abutting surface 2411 may abut against a protruding structure on the outer surface of the video tube 12, which may be an inherent structure of the video tube 12 or a specially provided structure for cooperating with the first step 241.

[0074] The first step 241 may be integrally formed with the flexible tube 23 and / or the catheter 21, or may be a structure adhesively connected or connected to the inner surface of the flexible tube 23 and / or the catheter 21 by other means, and there is no limitation on this.

[0075] In some embodiments, at least one second step 121 is formed by a protrusion on the outer surface of the video tube 12. A second abutting surface 1211 is formed on one side surface of the second step 121 facing the proximal end of the video tube 12, and the second abutting surface 1211 is used to abut against the first abutting surface 2411. In this way, a better limiting effect can be obtained. Similarly, the second step 121 may be integrally formed with the video tube 12, or may be a structure adhesively connected or connected to the outer surface of the video tube 12 by other means, and there is no limitation on this.

[0076] It can be understood that the setting of the first step 241 objectively occupies the internal space of the video cavity 2a, and the setting of the second step 121 will also increase the size of the video tube 12 at this position. Therefore, in some embodiments, at least one of the first step 241 and the second step 121 is a flexible structure, so that the first step 241 and / or the second step 121 can be deformed, so that when the video tube 12 is inserted or removed, the first step 241 and / or the second step 121 can give way. Figure 9 , which shows the process of inserting the video tube 12 into the video cavity 2a. When the video tube 12 is inserted into the video cavity 2a, the first step 241 and / or the second step 121 can be elastically deformed so that the second step 121 slides from the proximal side of the first step 241 to the distal side of the first step 241, so that the second abutting surface 1211 abuts against the first abutting surface 2411. Similarly, when the video tube 12 needs to be pulled out, a slightly larger force can be applied to make the video tube 12 break through the restriction of the limiting portion 24 and exit the hose 23 and the video channel. Those skilled in the art can reasonably set the hardness of the first step 241 and / or the second step 121 so that the two will not be deformed during the bending and resetting of the video tube 12, thereby playing a limiting role, and can be deformed when the user actively pulls out the video tube 12, thereby allowing the user to pull out the video tube 12. As an example, the first step 241 and the second step 121 may be a rubber member or a flexible PVC member, or one of the first step 241 and the second step 121 may be a rubber member or a flexible PVC member, and the other may be a metal member.

[0077] Obviously, those skilled in the art can understand that the first step 241 and the second step 121 can also be both rigid structures, such as metal parts. In this case, the first step 241 can be movably connected to the inner surface of the conduit 21 and / or the hose 23, and the user can actively control the first step 241 to move it to a position against the second step 121 of the video tube 12 to achieve a limiting effect, or move it to a position away from the second step 121 of the video tube 12 to allow the video tube 12 to be inserted or pulled out. Alternatively, the first step 241 can be fixed, and the second step 121 can be movably connected to the outer surface of the video tube 12 to achieve the above effect.

[0078] In some other embodiments, the hose 23 and / or the conduit 21 where the first step 241 is located are made of a flexible material. That is, the hose 23 and / or the conduit 21 have a certain elasticity. When the video tube 12 is inserted or removed, the corresponding parts of the hose 23 and / or the conduit 21 can expand outward, thereby allowing the video tube 12 to pass through. In these embodiments, the first step 241 and / or the second step 121 can be a flexible structure or a rigid structure. Similarly, the video tube 12 can also be a flexible structure. When the video tube 12 is inserted or removed, the corresponding parts of the video tube 12 can contract inward, thereby allowing the video tube 12 to pass through.

[0079] In some embodiments, the first step 241 can extend along the circumferential direction of the hose 23 or the conduit 21 to form a closed annular structure, so as to obtain a better limiting effect. Moreover, it can also prevent as much as possible the problem that the first step 241 and the second step 121 fail to fully abut due to the circumferential rotation of the video tube 12.

[0080] In some other embodiments, the limiting part 24 can include a plurality of first steps 241, and the plurality of first steps 241 are distributed along the circumferential direction of the hose 23 or the conduit 21. In this way, limiting can be performed at multiple positions in the circumferential direction of the video tube 12, and a better limiting effect can be obtained.

[0081] In some embodiments, the limiting part 24 can also include only one first step 241 and the first step 241 may not form a closed annular structure.

[0082] Similarly, in some embodiments, the second step 121 can extend along the circumferential direction of the video tube 12 to form a closed annular structure. In some other embodiments, the number of the second steps 121 is multiple, and the multiple second steps 121 are distributed along the circumferential direction of the video tube 12. In some embodiments, only one second step 121 can also be provided, and the second step 121 may not form a closed annular structure.

[0083] It should be noted that the structures of the first step 241 and the second step 121 do not need to be the same, and the numbers do not need to correspond one by one. For example, the first step 241 can be a closed annular structure, and the number of the second steps 121 can be multiple and distributed along the circumferential direction of the video tube 12. In some embodiments, only one first step 241 and one second step 121 can be provided, and neither of them forms a closed annular structure. In this case, the operator can rotate the video tube 12 around the axial direction of the video tube 12 after inserting the video tube 12, so that the first step 241 and the second step 121 abut against each other.

[0084] In some embodiments, one side surface of the first step 241 facing away from the light-transmitting blind end portion 231 is formed as a first guiding surface 2412. The proximal end of the first guiding surface 2412 extends to the inner surface of the hose 23 or the catheter 21, and the distal end extends to the first abutting surface 2411.

[0085] It can be understood that during the insertion of the video tube 12, the first guiding surface 2412 can apply a force along the radial direction of the video tube 12 to the first step 241 and the second step 121 when the video tube 12 is inserted, thereby more easily causing the deformation of the first step 241 and / or the second step 121, and making it easier for the second step 121 to slide to the distal side of the first step 241.

[0086] On the other hand, the setting of the first guiding surface 2412 also helps to partially convert the force for inserting the video tube 12 forward into a radial force away from the inner cavity of the video cavity 2a, so that the cross-section of the corresponding part of the video cavity 2a is appropriately enlarged, thus facilitating the insertion of the video tube 12.

[0087] On the other hand, since the first step 241 protrudes from the wall surface of the adjacent video cavity 2a, without the first guiding surface 2412, during the insertion process, the distal end of the video tube 12 may hit a dead end, affecting the smoothness of the insertion of the video tube 12, and even causing the video tube 12 to fail to be inserted successfully. The setting of the first guiding surface 2412 can reduce the probability of this situation occurring.

[0088] The first guiding surface 2412 can be a flat surface, an arc surface, or part of it is an arc surface and the other part is a flat surface, and there is no limitation on this.

[0089] In some embodiments, the outer edge of the first step 241 has an arc chamfer. In this way, on the one hand, it is convenient for mold processing and demolding during the manufacturing process, and on the other hand, it can also reduce the frictional resistance between the outer edge of the first step 241 and the outer surface of the video tube 12 during the insertion of the video tube 12, improving the smoothness of the insertion of the video tube 12.

[0090] In some embodiments, the direction of the first abutting surface 2411 from the outer edge to the inner edge can be inclined towards the direction away from the light-transmitting blind end portion 231. In this way, in the embodiments where the first step 241 and / or the second step 121 are flexible structures, when the video tube 12 is pulled out, a partial component of the force applied by the user along the axial direction of the video tube 12 can act on the first step 241 and / or the second step 121 approximately in the radial direction of the video tube 12, making the first step 241 and / or the second step 121 more likely to deform and being more labor-saving. On the other hand, it can also partially convert the force for inserting and pulling out the video tube 12 into a radial force away from the inner cavity of the video cavity, so that the cross-section of the corresponding part of the video cavity is appropriately enlarged, thus facilitating the insertion and pulling out of the video tube 12.

[0091] In some embodiments, see Figure 6 and Figure 8 The proximal end of the hose 23 has a sleeve section 232, and the distal end of the catheter 21 has a connecting section 212 connected to the first cavity 211, or the proximal end of the hose 23 has a connecting section 212, and the distal end of the catheter 21 has a sleeve section 232. The sleeve section 232 can be sleeved on the outer surface of the connecting section 212, and the first step 241 is formed on the inner surface of the connecting section 212, so as to facilitate demolding in the actual manufacturing process. In this embodiment, the sleeve section 232 can be connected to the connecting section 212 by, for example, bonding, ultrasonic connection, etc., which is not limited.

[0092] In the above embodiment, the first step 241 may not be formed on the inner surface of the connecting section 212, but may be formed on the side of the connecting section close to the hose 23 or the catheter 21, that is, formed on the inner surface of the first cavity 211, or formed on the inner surface of the second cavity 233.

[0093] In some embodiments, the side surface of the second step 121 facing the distal end of the video tube 12 is formed as a second guide surface 1212, the proximal end of the second guide surface 1212 extends to the second abutting surface 1211, and the distal end extends to the outer surface of the video tube 12. Similar to the first guide surface 2412, the second guide surface 1212 can, on the one hand, apply the force applied by the user to the first step 241 and / or the second step 121 in a radial direction of the video tube 12, making it easier to deform. On the other hand, it can also partially convert the force of inserting and removing the video tube into a radial force away from the inner cavity of the video cavity, so that the cross-section of the corresponding part of the video cavity is appropriately expanded, thereby facilitating the insertion and removal of the video tube 12. Similarly, the second guide surface 1212 can be a plane, or a curved surface, or a part of it is a curved surface and the other part is a plane, and there is no limitation on this.

[0094] The first guide surface 2412 may be provided only on the first step 241 without providing the second guide surface 1212 on the second step 121, or the second guide surface 1212 may be provided only on the second step 121 without providing the first guide surface 2412 on the first step 241, or the first guide surface 2412 may be provided on the first step 241 and the second guide surface 1212 may be provided on the second step 121 at the same time. In the embodiment where the first guide surface 2412 and the second guide surface 1212 are provided at the same time, the first guide surface 2412 and the second guide surface 1212 may be slidably matched, thereby further improving the smoothness of the insertion of the video tube 12.

[0095] It can be understood that since there are certain angles between the oral axis and the pharyngeal axis of the patient, as well as between the oral axis and the laryngeal axis, and such angles may vary among patients; in order to facilitate the insertion of the laryngeal mask, it is also necessary to adjust the head position of the patient. Correspondingly, there may also be changes in the above-mentioned angles of the same patient during the adjustment process.

[0096] In the related art, some of the laryngeal mask catheters are in an arc shape with a certain curvature in all or part of the segments, and some are in a straight-like shape. Whether the laryngeal mask catheter has a corresponding curvature or not, when the laryngeal mask is inserted into the patient's airway, there is a possibility of adjusting the bending angle of the catheter according to the actual situation of the patient's airway.

[0097] Furthermore, in the related art, the video tube can be inserted and removed from the video cavity, and when in use, the proximal end of the video tube is directly or indirectly relatively fixed (including detachable fixation) to the proximal end of the catheter. In order to facilitate the smooth insertion and removal of the video tube, the diameter of the corresponding video cavity needs to be larger than the diameter of the video tube. Therefore, when the laryngeal mask is not inserted into the patient's airway, the video tube and the video cavity can still be adapted, and the viewing window of the video cavity and the distal end face of the video tube can be effectively fitted, such as showing that the lengths of the video tube and the video cavity are equal outside the patient.

[0098] However, when the laryngeal mask is inserted into the patient's body, generally, the body of the laryngeal mask catheter needs to be bent and adjusted. Correspondingly, the video cavity will also be bent and deformed accordingly, and the video tube will also follow the bending. Different from the situation where part of the video tube is centered or even close to or close to the front cavity wall when the laryngeal mask is not inserted into the patient's airway, at this time, it may cause changes in the shuttle path of the video tube in the video cavity. For example, most of the inserted segment of the video tube may be close to the rear cavity wall and the lower cavity wall of the video cavity (such as taking this application Figure 2 as an example, most of the tube segments of the video tube may be close to the wall X of the video cavity), making the shuttle path of the video tube longer, and it is easy to present the phenomenon that the distal end of the video tube retracts into the video cavity in a direction away from the end face of the video cavity, resulting in the distal end face of the video tube not being effectively fitted with the viewing window of the video cavity.

[0099] In addition, when the video tube is controlled to bend and reset, similarly, it may cause changes in the relative position of the video tube in the video cavity, that is, cause changes in the shuttle path of the video tube, and further cause the distal end face of the video tube not to be effectively fitted with the viewing window of the video cavity. Thus, the phenomenon that the video tube retracts into the video cavity and the video tube is shorter than the video cavity appears. And due to the differences in the patient's anatomical structure and operation methods, there are certain differences in the amount of retraction of the video tube.

[0100] In the above-mentioned embodiment, the setting of the limiting portion 24 actually divides the video tube 12 into two parts. The first part is the part between the distal end of the video tube 12 and the contact position between the video tube 12 and the limiting portion 24, and the second part is the part between the contact position between the video tube 12 and the limiting portion 24 and the proximal end of the video tube 12.

[0101] After the video tube 12 is inserted, the relative movement of the above-mentioned first part is restricted by the limiting part 24. As described above, when the laryngeal mask is inserted into the patient's body, it is generally necessary to bend and adjust the body of the laryngeal mask catheter. Correspondingly, the video cavity will be bent and deformed, resulting in a change in the shuttle path of the video tube in the video cavity. In the case where the relative movement of the above-mentioned first part has been restricted, it is very necessary for the second part to adapt to the video cavity in terms of length. If the second part of the video tube has no self-adaptive function in terms of length, it may affect the bending deformation of the video cavity when the laryngeal mask is inserted, thereby affecting the bending performance of the laryngeal mask, reducing the smoothness of the laryngeal mask insertion, and even possibly causing damage to the laryngeal mask and the patient.

[0102] Therefore, in some embodiments, the proximal end of the video tube 12 is detachably and fixedly connected to the proximal end of the catheter 21, and the effective length of the video tube 12 inserted into the video cavity 2a is greater than the effective length of the video cavity 2a.

[0103] It should be noted that the effective length of the video tube 12 inserted into the video cavity 2a here refers to the length of the tube section of the video tube 12 located in the video cavity 2a after the video tube 12 is inserted in place. The effective length of the video cavity 2a refers to the length of the center line of the video cavity 2a. The center line is a virtual line located between the wall X and the wall Y of the video cavity 2a shown in Figure 2 and the distances between the center line and the wall X and the wall Y are equal.

[0104] Since the effective length of the video tube 12 inserted into the video cavity 2a is greater than the effective length of the video cavity 2a, when the video tube 12 is inserted into the video cavity 2a and the video cavity 2a has not been bent and deformed or the degree of bending and deformation is small, the video tube 12 already roughly runs along the posterior cavity wall and the lower cavity wall of the video cavity 2a. That is, it runs along a relatively long running path. In this way, even if the video cavity 2a further undergoes bending and deformation, the video tube 12 can adaptively compensate.

[0105] In this embodiment, the second part of the video tube 12 has a certain self - adapting function in terms of length to the video cavity 2a, enabling it to adapt to the bending deformation of the video cavity 2a and enhancing the bending performance of the laryngeal mask. On the other hand, the detachable fixed connection between the proximal end of the video tube 12 and the proximal end of the catheter 21 helps to control the insertion depth of the video tube 12. In the embodiment where a display device is provided at the proximal end of the video tube 12, it helps with the fixation of the display device, facilitating the operation of the operator for observation. On the further hand, since the second part of the video tube 12 has a certain self - adapting function in terms of length to the video cavity 2a, during the process of the controlled bending of the catheter 21 and / or the flexible tube 23, the displacement of the second part of the video tube 12 is relatively small, and the acting force applied to the distal end (the above - mentioned first part) of the video tube 12 is also small. Therefore, the probability of relative movement between the distal end of the video tube 12 and the light - transmitting blind end portion 231 will be further reduced.

[0106] In this embodiment, no specific limitation is imposed on the specific difference between the effective length of the video tube 12 inserted into the video cavity 2a and the effective length of the video cavity 2a. It should be noted that if the above - mentioned difference is too large, the problem that may occur is that the distal end of the video tube 12 will apply a large acting force to the light - transmitting blind end portion 231, which may cause damage to the light - transmitting blind end portion 231. Therefore, those skilled in the art should comprehensively consider the self - adapting ability of the video tube 12 and the pressure borne by the light - transmitting blind end portion 231 to specifically determine the above - mentioned difference.

[0107] In some other embodiments, in the case where the proximal end of the video tube 12 is detachably and fixedly connected to the proximal end of the catheter 21, an elastic mechanism can be provided on the video tube 12 to enable the video tube 12 to have certain axial compression and axial rebound performance to adapt to the bending deformation of the video cavity 2a.

[0108] In the above - mentioned embodiment where the proximal end of the video tube 12 is detachably and fixedly connected to the proximal end of the catheter 21, as an example, the video device 1 may include a housing 13. The control unit 11 can be connected to the housing 13 (for example, a part of the control unit 11 can be arranged inside the housing 13). A connecting member 25 can be provided at the proximal end of the catheter 21, and the housing 13 can be detachably and fixedly connected to the connecting member 25, thereby realizing the detachable fixed connection between the control unit 11 and the proximal end of the catheter 21, and further realizing the fixed connection between the proximal end of the video tube 12 and the proximal end of the catheter 21. Of course, those skilled in the art can also choose to adopt other suitable ways to detachably and fixedly connect the proximal end of the video tube 12 and the proximal end of the catheter 21.

[0109] The specific structures and connection methods of the housing 13 and the connecting member 25 are not limited. For example, please refer to Figure 3, the lower part of the housing 13 may have a laterally extending connecting platform 131 on one or both lateral sides, a clamping structure (not shown in the figure) provided at the bottom of the connecting platform 131, and a pressing portion 132 provided on the lateral outer side of the connecting platform 131. The pressing portion 132 is drivingly connected to the clamping structure. A clamping groove that cooperates with the clamping structure is formed on the upper surface of the connecting member 25. The pressing portion 132 drives the clamping structure to lock and unlock with the clamping groove.

[0110] In some other embodiments, the proximal end of the image tube 12 may move relative to the proximal end of the catheter 21. That is, the proximal end of the image tube 12 may not be fixedly connected to the proximal end of the catheter 21. In this way, the movement of the second part of the image tube 12 is no longer restricted, thereby improving the bending performance of the catheter 21, and reducing the probability of relative movement between the distal end of the image tube 12 and the light-transmitting blind end portion 231 through the limiting portion 24.

[0111] In some embodiments, a second limiting portion (not shown in the figure) may be provided on the side of the limiting portion 24 close to the light-transmitting blind end portion 31. The second limiting portion is used to limit the image tube 12 from continuing to move towards the light-transmitting blind end portion 231 after being inserted in place. In this way, to prevent the distal end of the image tube 12 from piercing through the light-transmitting blind end portion 231, and the specific structure of the second limiting portion is not limited.

[0112] The assembly process of the image tube 12 will be described in more detail and specifically below with reference to two specific embodiments.

[0113] Embodiment 1

[0114] In this embodiment, at least one of the first step 241 and the second step 121 is formed as a closed annular structure, and at least one of the first step 241 and the second step 121 is a flexible structure.

[0115] When the image tube 12 needs to be inserted, please refer to Figure 9 , the operator can insert the image tube 12 into the image cavity 2a through the proximal end of the catheter 21. During the insertion process, the end portion of the image tube 12 passes over the first step 241 and continues to move towards the light-transmitting blind end portion 231 until the second guiding surface 1212 of the second step 121 abuts against the first guiding surface 2412 of the first step 241, resulting in the insertion of the image tube 12 being blocked. At this time, the operator can apply a little force to deform the first step 241 and / or the second step 121, and / or expand the image cavity 2a outward, so that the second step 121 crosses the first step 241 to reach the distal side. Then, the first abutting surface 2411 and the second abutting surface 1211 will abut against each other, and the distal end surface of the image tube 12 will be in close contact with the inner surface of the light-transmitting blind end portion 231.

[0116] Next, the operator can continue to insert the part of the proximal end of the video tube 12 that is still outside the video cavity 2a into the video cavity 2a, and continue to maintain an appropriate insertion force, so that the effective length of the video tube 12 inserted into the video cavity 2a is greater than the effective length of the video cavity 2a, and fixedly connect the housing 13 and the connecting member 25, thereby completing the assembly of the video tube 12. In some other embodiments, the proximal end of the video tube 12 may not be fixedly connected to the catheter 21, but is in a state where the proximal end of the video tube 12 can move relative to the proximal end of the catheter 21. At this time, the housing 13 may not be provided, or the step of fixedly connecting the housing 13 and the connecting member 25 may not be performed.

[0117] When it is necessary to pull out the video tube 12, the operator can first disassemble the housing 13 from the connecting member 25, and then apply a little force to deform the first step 241 and / or the second step 121, and / or expand the video cavity 2a outward, so that the second step 121 crosses the first step 241 to reach the proximal side, and then the video tube 12 can be pulled out from the video cavity 2a.

[0118] Embodiment 2

[0119] In this embodiment, neither the first step 241 nor the second step 121 is formed as a closed ring structure, and the number of the first steps 241 can be one or more. In the case where the number of the first steps 241 is multiple, the multiple first steps 241 are circumferentially distributed along the hose 23 or the catheter 21. The number of the second steps 121 can also be one or more. In the case where the number of the second steps 121 is multiple, the multiple second steps 121 are circumferentially distributed along the video tube 12.

[0120] When it is necessary to insert the video tube 12, the operator can insert the video tube 12 into the video cavity 2a through the proximal end of the catheter 21. After the second step 121 reaches the proximal side of the first step 241, there may be two situations. In one situation, the first guiding surface 2412 of at least one first step 241 abuts against the second guiding surface 1212 of at least one second step 121, resulting in an obstacle to the insertion of the video tube 12. At this time, the operator can apply a little force to deform the first step 241 and / or the second step 121, and / or expand the video cavity 2a outward, so that the second step 121 crosses the first step 241 to reach the distal side, or the operator can also rotate the video tube 12 to stagger the first step 241 and the second step 121, so that the second step 121 avoids the first step 241. Of course, the operator can also perform the above two operations simultaneously. In the other situation, the first step 241 and the second step 121 are staggered from each other. At this time, the second step 121 can directly reach the distal side of the first step 241.

[0121] After the second step 121 reaches the distal side of the first step 241, there may still be two situations. In one situation, the first step 241 and the second step 121 are in a substantially opposite state, and the area where the first abutting surface 2411 and the second abutting surface 1211 abut against each other is relatively large. In this case, there is no need to perform the alignment operation on the video cavity 2a. In another situation, the area where the first abutting surface 2411 and the second abutting surface 1211 abut against each other is relatively small, or even the first abutting surface 2411 and the second abutting surface 1211 do not form an abutment against each other. In this case, the operator needs to perform an alignment operation. For example, the video tube 12 can be rotated around the axial direction of the video tube 12 to adjust the first step 241 and the second step 121 to a substantially opposite state (the area where the first abutting surface 2411 and the second abutting surface 1211 abut against each other should be large enough) for the video cavity 2a. In some other embodiments, alignment marks can be respectively provided at the proximal ends of the video tube 12 and the video cavity 2a. For example, arrows, marking points, etc. can be provided on their outer surfaces. When the two alignment marks are aligned, it indicates that the first step 241 and the second step 121 are opposite to each other. When not aligned, it means that the first step 241 and the second step 121 are not opposite to each other. The operator can rotate the video tube 12 around the axial direction to align or stagger the two alignment marks to complete the relevant operation.

[0122] Next, the operator can continue to maintain an appropriate insertion force, so that the effective length of the video tube 12 inserted into the video cavity 2a is greater than the effective length of the video cavity 2a, and fix the housing 13 and the connecting member 25, thereby completing the assembly of the video tube 12. In some other embodiments, the proximal end of the video tube 12 may not be fixedly connected to the catheter 21, but is in a state where the proximal end can move relative to the proximal end of the catheter 21. At this time, the housing 13 may not be provided, or the step of fixing the housing 13 and the connecting member 25 may not be performed.

[0123] When it is necessary to pull out the video tube 12, the operator can first disassemble the housing 13 from the connecting member 25, and then apply a little force to deform the first step 241 and / or the second step 121, and / or expand the video cavity 2a outward, so that the second step 121 crosses the first step 241 to reach the proximal side, and then pull out the video tube 12. Alternatively, the operator can rotate the video tube 12 to misalign the first step 241 and / or the second step 121, and then pull out the video tube 12. Of course, the operator can also choose to perform the above two operations simultaneously.

[0124] An embodiment of the present application further provides a laryngeal mask body 2, which includes a catheter 21, a sealing seat 22, and a flexible tube 23. The catheter 21 has a first channel 211. The sealing seat 22 is connected to the distal end of the catheter 21. The proximal end of the flexible tube 23 is connected to the distal end of the catheter 21, and a light-transmitting blind end portion 231 is formed at the distal end of the flexible tube 23. The flexible tube 23 has a second channel 233, and the second channel 233 communicates with the first channel 211 to form a video channel 2a for accommodating the video tube 12. At least a part of the structure of the flexible tube 23 is located within the sealing seat 22. The video tube 12 can be inserted into and removed from the video channel 2a. At least a part of the structure of the flexible tube 23 is located within the sealing seat 22, and the flexible tube 23 can bend and reset synchronously with the video tube 12. Wherein, at least one limiting portion 24 is formed on the catheter 21 and / or the flexible tube 23, and the limiting portion 24 is used to limit the relative movement after the distal end of the video tube 12 is inserted into the flexible tube 23.

[0125] An embodiment of the present application further provides a video device 1 for a laryngeal mask, which is applied to the laryngeal mask body 2. The video device 1 includes a control part 11 and a video tube 12. The video tube 12 is connected to the control part 11 and can bend and reset under the control of the control part 11. The laryngeal mask body 2 includes a catheter 21 and a flexible tube 23. The catheter 21 has a first channel 211. The proximal end of the flexible tube 23 is connected to the distal end of the catheter 21, and a light-transmitting blind end portion 231 is formed at the distal end of the flexible tube 23. The flexible tube 23 has a second channel 233, and the second channel 233 communicates with the first channel 211 to form a video channel 2a for accommodating the video tube 12. The video tube 12 can be inserted into and removed from the video channel 2a. The flexible tube 23 can bend and reset synchronously with the video tube 12. Wherein, at least one second step 121 is formed by convexity on the outer surface of the video tube 12, and one side surface of the second step 121 facing the proximal end of the video tube 12 is formed as a second abutting surface 1211, and the second abutting surface 1211 is used to abut against the limiting portion 24 of the catheter 21 and / or the flexible tube 23 to limit the relative movement after the distal end of the video tube 12 is inserted into the flexible tube 23.

[0126] Some specific technical details of the video device 1 and the laryngeal mask body 2 in the embodiments of the present application can be referred to the descriptions in the relevant parts above, and will not be elaborated here.

[0127] In the description of the present application, the descriptions referring to terms such as "one embodiment", "some embodiments", "examples", "specific examples", or "some examples", etc. mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the embodiments of the present application. In the present application, the schematic expressions of the above terms are not necessarily directed to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, without contradiction, those skilled in the art can combine the different embodiments or examples described in the present application and the features of the different embodiments or examples.

[0128] The above are only the preferred embodiments of the present application and are not used to limit the present application. For those skilled in the art, the present application can have various changes and modifications. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A laryngeal mask, characterized in that: The laryngeal mask comprises a laryngeal mask body and a video device. The video device comprises a control unit and a video tube, wherein the video tube is connected to the control unit and can be bent and reset under the control of the control unit; The laryngeal mask body comprises: A catheter having a first lumen; A sealing seat connected to the distal end of the catheter; and A hose, the proximal end of which is connected to the distal end of the catheter and the distal end of which is formed with a light-transmitting blind end, the hose having a second cavity, the second cavity being communicated with the first cavity to form a video cavity for accommodating the video tube, the video tube being pluggable in the video cavity, at least part of the structure of the hose being located in the sealing seat, and the hose being able to bend and reset synchronously with the video tube, wherein: The catheter and / or the hose is formed with at least one limiting portion, and the limiting portion is used to limit the relative movement of the distal end of the video tube after being inserted into the hose.

2. The laryngeal mask according to claim 1, characterized in that The distal end of the flexible tube is fitted with the video tube.

3. The laryngeal mask according to claim 1, characterized in that The proximal end of the hose is clearance-matched with the video tube.

4. The laryngeal mask according to claim 2, characterized in that The video tube includes a bendable segment and a video segment, wherein the video segment is connected to the distal end of the bendable segment, and the bendable segment can be bent and reset under the control of the control unit, wherein the video segment and at least a portion of the bendable segment are inserted into the hose, and the distal end surface of the video segment is in contact with the light-transmitting blind end portion.

5. The laryngeal mask according to claim 1, characterized in that: The video device comprises a light source, which is arranged at the far end of the video tube, or The video device includes a light source and a light guide. The light source is arranged at the proximal end of the video tube. The light guide is arranged inside the video tube. The light emitted by the light source is injected from the proximal end of the light guide. The distal end of the light guide extends to the distal end of the video tube.

6. The laryngeal mask according to any one of claims 1 to 5, characterized in that: The limiting portion includes a first step formed by a protrusion on the inner surface of the hose and / or the conduit, and a side surface of the first step facing the light-transmitting blind end portion is formed as a first abutting surface, and the first abutting surface is used to abut against the video tube.

7. The laryngeal mask according to claim 6, characterized in that The outer surface of the video tube is raised to form a second step, and a side surface of the second step facing the proximal end of the video tube is formed as a second abutting surface, and the second abutting surface is used to abut against the first abutting surface.

8. The laryngeal mask according to claim 7, characterized in that At least one of the first step and the second step is a flexible structure. When the video tube is inserted into the video cavity and the hose, the first step and / or the second step can undergo elastic deformation so that the second step can slide from the proximal side of the first step to the distal side of the second step, so that the second abutment surface abuts against the first abutment surface.

9. The laryngeal mask according to claim 6, characterized in that The first step extends along the circumference of the hose or the conduit to form a closed ring structure, or, The limiting portion includes a plurality of the first steps, and the plurality of the first steps are distributed along the circumference of the hose or the conduit.

10. The laryngeal mask according to claim 6, characterized in that A side surface of the first step facing away from the light-transmitting blind end portion is formed as a first guide surface, a proximal end of the first guide surface extends to the inner surface of the hose or the catheter, and a distal end of the first guide surface extends to the first abutting surface.

11. The laryngeal mask according to claim 6, characterized in that The outer edge of the first step has an arc-shaped chamfer.

12. The laryngeal mask according to claim 6, characterized in that The first abutting surface is inclined from the outer edge to the inner edge in a direction away from the light-transmitting blind end portion.

13. The laryngeal mask according to claim 6, characterized in that The proximal end of the hose has a sleeve section, and the distal end of the catheter has a connection section communicating with the video cavity, or the proximal end of the hose has a connection section, and the distal end of the catheter has a sleeve section communicating with the video cavity; The sleeve section is sleeved on the outer surface of the connecting section, and the first step is formed on the inner surface of the connecting section, or the first step is formed on a side of the connecting section close to the hose or the conduit.

14. The laryngeal mask according to claim 7, characterized in that A side surface of the second step facing the distal end of the video tube is formed as a second guide surface, a proximal end of the second guide surface extends to the second abutting surface, and a distal end extends to the outer surface of the video tube.

15. The laryngeal mask according to claim 7, characterized in that The second step extends along the circumference of the video tube to form a closed ring structure, or the number of the second steps is multiple, and the multiple second steps are distributed along the circumference of the video tube.

16. The laryngeal mask according to claim 1, characterized in that The proximal end of the video tube is detachably fixedly connected to the proximal end of the catheter, and the effective length of the video tube inserted into the video cavity is greater than the effective length of the video cavity.

17. The laryngeal mask according to claim 16, characterized in that The video device comprises a shell, the control unit is connected to the shell, a connecting piece is arranged at the proximal end of the catheter, and the shell is detachably fixedly connected to the connecting piece.

18. The laryngeal mask according to claim 17, characterized in that The lower part of the housing has a laterally extending connecting platform, a clamping structure arranged at the bottom of the connecting platform, and a pressing portion arranged at the laterally outer side of the connecting platform on one or both lateral sides, and the pressing portion is drivingly connected to the clamping structure; A slot that cooperates with the snap-fit ​​structure is formed on the upper surface of the connector, and the pressing portion can drive the snap-fit ​​structure to lock and unlock the slot.

19. The laryngeal mask according to claim 1, characterized in that The proximal end of the video tube and the proximal end of the catheter can move relative to each other.

20. A laryngeal mask body, characterized in that: The laryngeal mask body comprises: A catheter having a first lumen; A sealing seat connected to the distal end of the catheter; and A hose, the proximal end of which is connected to the distal end of the catheter and the distal end of which is formed with a light-transmitting blind end, the hose having a second cavity, the second cavity being connected to the first cavity to form a video cavity for accommodating a video tube, the video tube being pluggable in the video cavity, at least part of the structure of the hose being located in the sealing seat, and the hose being able to bend and reset synchronously with the video tube, wherein: The catheter and / or the hose is formed with at least one limiting portion, and the limiting portion is used to limit the relative movement of the distal end of the video tube after being inserted into the hose.

21. A video device for a laryngeal mask, applied to a laryngeal mask body, characterized in that: The video device comprises: Control Department; A video tube, the video tube is connected to the control unit and can be bent and reset under the control of the control unit, the laryngeal mask body includes a catheter and a hose, the catheter has a first cavity, the proximal end of the hose is connected to the distal end of the catheter and the distal end of the hose is formed with a light-transmitting blind end, the hose has a second cavity, the second cavity is connected to the first cavity to form a video cavity for accommodating the video tube, the video tube is pluggable into the video cavity, and the hose can be synchronously bent and reset following the video tube, The outer surface of the video tube is raised to form a second step, and the side surface of the second step facing the proximal end of the video tube is formed as a second abutment surface, and the second abutment surface is used to abut against the limiting portion of the catheter and / or the hose to limit the relative movement of the distal end of the video tube after being inserted into the hose.

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