Auxiliary device for placing laryngeal mask
By incorporating a dual-rod structure and angle adjustment mechanism, the design solves the problem of inconvenient operation of the laryngeal mask for infants and young children, enabling precise placement of the mask and reducing friction, thereby improving ease of operation and success rate.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- THE FIRST AFFILIATED HOSPITAL OF ARMY MEDICAL UNIV
- Filing Date
- 2026-04-10
- Publication Date
- 2026-05-08
AI Technical Summary
Existing laryngeal masks are inconvenient to use in infants and young children, as they are difficult to bend and insert into the pharynx, and the tongue can easily enter the concave part of the mask, increasing friction and making insertion difficult.
The design employs a dual-rod structure, combining angle adjustment components and elastic protrusions to achieve a precise fit between the laryngeal mask and the pharynx, reducing friction and improving ease of operation.
It improves the success rate of laryngeal mask airway placement, reduces the technical requirements for operators, and reduces patient suffering, showing broad prospects for clinical application.
Smart Images
Figure CN121987908A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of medical device technology, and in particular to an auxiliary device for placing a laryngeal mask. Background Technology
[0002] A laryngeal mask airway (LMA) is a type of artificial airway medical device, consisting of a ventilation mask and a ventilation tube. The ventilation mask is placed inside the pharynx to seal the area around the larynx, preventing air leakage and pharyngeal secretions from entering the larynx. The ventilation tube of the LMA connects to the ventilation mask to supply air and maintain the patient's breathing. The flexible and bendable nature of the LMA's ventilation tube makes it impossible to push the mask into the pharynx directly through the tube; instead, it requires manual manipulation, which is inconvenient. This is especially true when using a flexible LMA on infants and young children, as manual manipulation can easily exceed their mouth opening, making insertion difficult. Furthermore, the central depression of the ventilation mask often causes the tongue to enter the depression during insertion, increasing friction and further complicating the process. Therefore, providing an auxiliary device to improve the ease of operation of a flexible LMA is a pressing technical challenge in this field. Summary of the Invention
[0003] To address the above technical problems, this invention provides an auxiliary device for laryngeal mask placement, which can be adapted to different models of laryngeal mask ventilation tubes, effectively improve the success rate of laryngeal mask placement, reduce the technical requirements of operators, and greatly enhance the convenience of surgery and the patient's experience.
[0004] The technical solution adopted in this invention is as follows: an auxiliary device for laryngeal mask airway placement, comprising a first rod and a second rod. The upper part of the first rod is provided with a handhold, and the lower part of the second rod is provided with a laryngeal mask support assembly. The lower end of the first rod and the upper end of the second rod are connected by an angle adjustment component. Specifically, the angle adjustment component enables the angle between the first rod and the second rod to be adjusted to meet the personalized needs of different patients with different pharyngeal anatomy. The dual-rod separation design makes the handhold and the laryngeal mask support assembly relatively independent, avoiding interference with the laryngeal mask support assembly during hand operation and improving the stability and accuracy of the laryngeal mask placement process. Furthermore, the angle adjustment component includes a meshing drive gear and an arc-shaped rack. A first groove is formed at the lower end of the first rod, and the drive gear is mounted in the first groove via a horizontal rotating shaft. A second groove is formed at the upper end of the second rod, and an arc-shaped rack is mounted in the second groove. Both ends of the horizontal rotating shaft pass through the groove walls of the first groove and are rotatably connected to the groove walls of the second groove. The horizontal rotating shaft is connected to a drive device. The meshing transmission of the gear and rack enables precise adjustment of the fitting angle between the laryngeal mask and the pharynx. The self-locking characteristic of the gear and rack meshing ensures that the laryngeal mask support assembly remains stable at the adjusted angle, preventing angle shift due to shaking during insertion. Further, the driving device includes a forward-rotating drum assembly and a reverse-rotating drum assembly. The forward-rotating drum assembly includes two forward-rotating drums, with the same cable wound around both drums. One forward-rotating drum is fixedly mounted on the horizontal rotating shaft, and the other forward-rotating drum is mounted in the first rod body via a forward rotating shaft. A forward-rotating wheel is fixedly mounted on the forward rotating shaft, and the outer circumferential surface of the forward-rotating wheel extends out of the first rod body. And / or, the reverse-rotating drum assembly includes two reverse-rotating drums, with one reverse-rotating drum fixedly mounted on the horizontal rotating shaft. One of the reversing drums is wound with the same cable, and the other reversing drum is installed in the first rod body through a forward rotating shaft. A reversing wheel is fixedly sleeved on the forward rotating shaft, and the outer circumferential surface of the reversing wheel extends out of the first rod body. Specifically, the forward and reversing drum assembly realizes the bidirectional rotation of the drive gear, thereby meeting the adjustment requirements of different angles of the first and second rod bodies. The forward and reversing drum assembly is set on both sides of the drive gear to ensure that the force on both sides of the drive gear is uniform, avoid poor meshing of the gear and rack due to uneven force, and improve the stability of the transmission. Furthermore, the laryngeal mask support assembly includes a receiving cavity at the lower end of the second rod, wherein an elastic protrusion is provided in the receiving cavity, the elastic protrusion is connected to the bottom of the receiving cavity by a spring, a cable is fixedly connected to the elastic protrusion, and the free end of the cable passes through the first rod and is connected to an adjustment device; specifically, the elastic protrusion prevents the tongue from entering the recess of the ventilation mask of the laryngeal mask, which can effectively reduce the friction during the placement of the ventilation mask into the pharynx and improve the adaptability of the laryngeal mask placement process; Furthermore, the adjusting device includes a stop ball and a stop buckle. A horizontal groove is formed around the periphery of the first rod body, and a cable hole is formed in the horizontal groove. The free end of the cable passes through the cable hole and is fixedly connected to the stop ball. The stop ball is engaged with the stop buckle. Specifically, the engagement structure of the stop ball and the stop buckle fixes the cable. The movement of the stop ball facilitates the release / retraction of the elastic protrusion. Furthermore, the diameters of the first and second rods are smaller than the diameter of the laryngeal mask airway tube; specifically, this structure provides sufficient space for the two rods, facilitating their movement and angle adjustment, reducing friction with the airway tube, and improving the flexibility of the device. Furthermore, the first rod is a cylindrical rod, and the second rod is a cylindrical rod; specifically, this structure improves the comfort of operation on the one hand, and reduces friction with the ventilation tube on the other hand, making it easier to remove the tube after insertion; Furthermore, the handheld part is a handle; specifically, it is convenient for the operator to hold, improving the stability and flexibility of operation; Furthermore, the forward-rotating wheel and the reverse-rotating wheel are positioned close to the handgrip; specifically, this structure allows the operator to easily rotate the wheels while holding the handle, improving operational convenience and reducing operator fatigue. Furthermore, the elastic protrusion matches the recessed area of the laryngeal mask; specifically, this prevents foreign objects from entering and improves the reliability of the device.
[0005] Beneficial effects: Compared with the prior art, the auxiliary device for laryngeal mask placement of the present invention has a simple structure. Through the integrated design of the double rod structure, gear and rack angle adjustment component and elastic protrusion type laryngeal mask support component, it has the advantages of high precision, convenient operation, strong adaptability and good safety. It can effectively improve the success rate of laryngeal mask placement, reduce the technical requirements of operators, reduce the pain of patients, and has broad clinical application prospects. Attached Figure Description
[0006] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 for Figure 1 Another usage state diagram; Figure 3 for Figure 1 Top view; Figure 4 for Figure 2 Another usage state diagram; Figure 5 This is a three-dimensional structural diagram of an embodiment of the present invention. Detailed Implementation
[0007] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.
[0008] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back, etc.) are only used to explain the relative positional relationship and movement of the components in a specific posture (as shown in the attached figures). If the specific posture changes, the directional indication will also change accordingly. Furthermore, the descriptions involving "first," "second," etc., in this invention are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, features defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by the present invention.
[0009] Please see Figure 1-4 An auxiliary device for laryngeal mask placement provided in one embodiment of the present invention includes a first rod 1 and a second rod 2. The upper part of the first rod 1 is provided with a handhold, and the lower part of the second rod 2 is provided with a laryngeal mask support assembly. The lower end of the first rod 1 and the upper end of the second rod 2 are connected by an angle adjustment member 3. The angle adjustment member enables the angle between the first rod 1 and the second rod 2 to be adjusted to meet the personalized needs of different patients with different pharyngeal anatomy. The dual-rod separation design makes the handhold and the laryngeal mask support assembly relatively independent, avoiding interference with the laryngeal mask support assembly during hand operation and improving the stability and accuracy of the laryngeal mask placement process. In some specific embodiments, please refer to 3-5. The angle adjustment component 3 includes a drive gear 31 and an arc-shaped rack 32 that mesh with each other. The lower end of the first rod 1 is provided with a first groove 1a. The drive gear 31 is installed in the first groove 1a through a horizontal rotating shaft 4. The upper end of the second rod 2 is provided with a second groove 2a. The arc-shaped rack 32 is installed in the second groove 2a. The two ends of the horizontal rotating shaft 4 pass through the groove wall of the first groove 1a and are rotatably connected to the groove wall of the second groove 2a. The horizontal rotating shaft 4 is connected to a drive device 5. Through the meshing transmission of the gear and rack, the included angle between the first rod 1 and the second rod 2 is adjusted to achieve a precise fit between the laryngeal mask and the pharynx. At the same time, the self-locking characteristic of the gear and rack meshing makes the adjusted angle position stable and avoids angle deviation due to shaking during insertion. It is understood that the drive device can be a motor or a manual crank, the purpose of which is to drive the horizontal shaft to rotate. Those skilled in the art can set it according to the situation, and it will not be described in detail here.
[0010] For some specific embodiments, please refer to Figure 3-4The driving device 5 includes a forward-rotating drum assembly 51 and a reverse-rotating drum assembly 52. The forward-rotating drum assembly 51 includes two forward-rotating drums 511, with the same cable wound around the two forward-rotating drums 511. One of the forward-rotating drums 511 is fixedly mounted on the horizontal rotating shaft 4, and the other forward-rotating drum 511 is mounted in the first rod body 1 through a forward rotating shaft 512. A forward-rotating wheel 513 is fixedly mounted on the forward rotating shaft 512, and the outer circumferential surface of the forward-rotating wheel 513 extends out of the first rod body 1. In use, by rotating the forward-rotating wheel, the driving gear is driven to rotate in the forward direction, so that the included angle between the first rod body 1 and the second rod body 2 gradually decreases. For some specific embodiments, please refer to Figure 3-4 The reversing drum assembly 52 includes two reversing drums 521. One of the reversing drums 521 is fixedly sleeved on the horizontal rotating shaft 4. The same cable is wound around the two reversing drums 521. The other reversing drum 521 is installed in the first rod body 1 through a reverse rotating shaft 522. A reverse rotating wheel 523 is fixedly sleeved on the reverse rotating shaft 522. The outer circumferential surface of the reverse rotating wheel 523 extends out of the first rod body 1. In use, by rotating the reverse rotating wheel, the drive gear is driven to rotate in the opposite direction, so that the included angle between the first rod body 1 and the second rod body 2 gradually increases. The forward and reverse drum assembly is set on both sides of the drive gear to ensure that the force on both sides of the drive gear is uniform, avoid poor meshing of the gear and rack due to uneven force, and improve the stability of the transmission. In some specific embodiments, the laryngeal mask support assembly includes a receiving cavity 21 located at the lower end of the second rod 2. An elastic protrusion 6 is provided in the receiving cavity 21. The elastic protrusion 6 is connected to the bottom of the receiving cavity 21 via a spring. A cable is fixedly connected to the elastic protrusion 6, and the free end of the cable extends out of the first rod 1 and is connected to an adjustment device. When the elastic protrusion is moved out of the receiving cavity and into the recess of the laryngeal mask's ventilation mask, it can prevent the tongue from entering, thereby effectively reducing the friction during the placement of the ventilation mask into the throat and improving the adaptability of the laryngeal mask placement process. For some specific embodiments, please refer to Figure 1 and Figure 5 The adjusting device includes a stop ball 7 and a stop buckle 8. A horizontal groove 9 is formed around the periphery of the first rod body 1. A cable hole 10 is formed in the horizontal groove 9. The free end of the cable passes through the cable hole 10 and is fixedly connected to the stop ball 7. The stop ball 7 is engaged with the stop buckle 8. In use, when the stop ball is engaged with the stop buckle, the elastic protrusion is pulled into the receiving cavity of the second rod body under the action of the cable. When the stop ball is disengaged from the stop buckle, the elastic protrusion is pushed out of the receiving cavity of the second rod body under the action of the spring and enters the ventilation mask recess of the laryngeal mask to prevent the tongue from entering. In some specific embodiments, the diameters of the first rod 1 and the second rod 2 are smaller than the diameter of the laryngeal mask airway tube. In use, on the one hand, it is convenient for the first rod and the second rod to be easily inserted into the laryngeal mask airway tube to assist in the placement of the laryngeal mask. On the other hand, it is convenient for the first rod and the second rod to be easily removed from the laryngeal mask airway tube after the laryngeal mask is placed. In some specific embodiments, the first rod 1 is a cylindrical rod and the second rod 2 is a cylindrical rod; the cylindrical first rod and the cylindrical second rod reduce friction with the ventilator, making it easier to remove the tube after insertion. The cylindrical and cylindrical structures are easy to process, have high production efficiency, and low cost. In some specific embodiments, the hand-held part is a handle 11; the handle-type hand-held part is ergonomically designed and easy for the operator to hold; In some specific embodiments, the forward-rotating wheel 513 and the reverse-rotating wheel 523 are positioned close to the handheld part; during use, the operator can easily rotate the wheels while holding the handle, improving the convenience of operation and reducing operator fatigue; In some specific embodiments, the elastic protrusion 6 matches the recessed area of the laryngeal mask body; it is understood that the elastic protrusion 6 can be circular, elliptical, tongue-shaped, etc., and its shape matches the recessed area of the laryngeal mask body. The elastic protrusion 6 is made of soft rubber material. Those skilled in the art should know that soft rubber material refers to a soft material with a certain degree of extensibility and flexibility, including but not limited to silicone, rubber, soft polyvinyl chloride (PVC), and ethylene. Materials include vinyl acetate copolymer (EVA), polyolefin thermoplastic elastomer (POE), thermoplastic elastomer (TPE), and polypropylene (PP).
[0011] The auxiliary device for laryngeal mask placement provided in this embodiment of the invention will be further described below with reference to a specific application scenario: An auxiliary device for placing a laryngeal mask includes a cylindrical first rod 1 and a cylindrical second rod 2. The first rod 1 has a handle 11 at its upper part, and the second rod 2 has a laryngeal mask support assembly at its lower part. The first rod 1 has a first groove 1a and a third groove 1b. The first groove 1a is located near the lower end of the first rod 1, and the third groove 1b is located near the upper end of the first rod 1. A drive gear 31 is mounted in the first groove 1a via a horizontal rotating shaft 4. The second rod 2... The upper end of the shaft has a second groove 2a, and an arc-shaped rack 32 is installed in the second groove 2a. The drive gear 31 meshes with the arc-shaped rack 32. The two ends of the horizontal rotating shaft 4 pass through the groove wall of the first groove 1a and are rotatably connected to the groove wall of the second groove 2a. The horizontal rotating shaft 4 is connected to a drive device 5. The drive device 5 includes two forward rotating drums 511 and two reverse rotating drums 521. The two reverse rotating drums 521 are wound with the same cable, and the two forward rotating drums 511 are wound with the same cable. A forward-rotating drum 511 and a reverse-rotating drum 521 are fixedly mounted on the horizontal rotating shaft 4. The forward-rotating drum 511 and the reverse-rotating drum 521 are located on both sides of the drive gear 31. Another forward-rotating drum 511 and another reverse-rotating drum 521 are respectively installed in the third groove 1b via a forward rotating shaft 512 and a reverse rotating shaft 522. The outer circumferential surfaces of both the forward-rotating drum 511 and the reverse-rotating drum 521 protrude through the groove wall of the third groove 1b. The forward-rotating wheel 51... 3 and the reversing wheel 523 are located near the hand-held part; the lower end of the second rod body 2 has a receiving cavity 21, the receiving cavity 21 is provided with an elastic protrusion 6, the elastic protrusion 6 is connected to the bottom of the receiving cavity 21 by a spring, the circumference of the first rod body 1 is provided with a horizontal groove 9, the horizontal groove 9 is provided with a cable hole 10, the elastic protrusion 6 is fixedly connected with a cable, the free end of the cable passes through the cable hole 10 and is fixedly connected to the stop ball 7, the stop ball 7 is engaged with the stop buckle 8.
[0012] In use, the auxiliary device is inserted into the laryngeal mask airway and moved within the airway until the lower end of the second rod 2 is positioned at the laryngeal mask body. The stop ball 7 is then disengaged from the stop buckle 8. Under the action of the spring 61, the elastic protrusion 6 is pushed out of the receiving cavity 21 of the second rod and enters the recess of the laryngeal mask body. During the process of placing the laryngeal mask into the patient's pharynx, medical personnel can manually operate the forward rotating wheel 513 and the reverse rotating wheel 523 to adjust the bending angle of the laryngeal mask to adapt to different patients' pharyngeal structures and improve the adaptability of the laryngeal mask placement process. After the laryngeal mask is placed into the pharynx, the stop ball is pulled to engage with the stop buckle, thereby retracting the elastic protrusion into the receiving cavity 21 of the second rod, thus facilitating the removal of the auxiliary device from the laryngeal mask airway.
[0013] Finally, it should be noted that the above description is only a preferred embodiment of the present invention. Those skilled in the art, under the guidance of the present invention, can make various similar representations without departing from the spirit and claims of the present invention, and such modifications all fall within the protection scope of the present invention.
Claims
1. An auxiliary device for placing a laryngeal mask airway, characterized in that: It includes a first rod (1) and a second rod (2). The upper part of the first rod (1) is provided with a hand-held part, and the lower part of the second rod (2) is provided with a laryngeal mask support assembly. The lower end of the first rod (1) and the upper end of the second rod (2) are connected by an angle adjustment component (3).
2. The auxiliary device for placing a laryngeal mask according to claim 1, characterized in that: The angle adjustment component (3) includes a drive gear (31) and an arc rack (32) that mesh with each other. The lower end of the first rod (1) is provided with a first groove (1a). The drive gear (31) is installed in the first groove (1a) through a horizontal rotating shaft (4). The upper end of the second rod (2) is provided with a second groove (2a). The arc rack (32) is installed in the second groove (2a). The two ends of the horizontal rotating shaft (4) pass through the groove wall of the first groove (1a) and are rotatably connected to the groove wall of the second groove (2a). The horizontal rotating shaft (4) is connected to a drive device (5).
3. The auxiliary device for placing a laryngeal mask according to claim 2, characterized in that: The drive device (5) includes a forward-rotating drum assembly (51) and a reverse-rotating drum assembly (52). The forward-rotating drum assembly (51) includes two forward-rotating drums (511), with the same cable wound around the two forward-rotating drums (511). One of the forward-rotating drums (511) is fixedly mounted on the horizontal rotating shaft (4), and the other forward-rotating drum (511) is mounted in the first rod body (1) via a forward rotating shaft (512). A forward-rotating wheel (513) is fixedly mounted on the forward rotating shaft (512). The outer circumferential surface of the first rod body (1) extends out; the reverse drum assembly (52) includes two reverse drums (521), one of the reverse drums (521) is fixedly sleeved on the horizontal rotating shaft (4), the two reverse drums (521) are wound with the same cable, and the other reverse drum (521) is installed in the first rod body (1) through the reverse rotating shaft (522), the reverse rotating shaft (522) is fixedly sleeved with a reverse rotating wheel (523), and the outer circumferential surface of the reverse rotating wheel (523) extends out of the first rod body (1).
4. The auxiliary device for placing a laryngeal mask according to claim 1, characterized in that: The laryngeal mask support assembly includes a receiving cavity (21) opened at the lower end of the second rod (2). The receiving cavity (21) is provided with an elastic protrusion (6). The elastic protrusion (6) is connected to the bottom of the receiving cavity (21) by a spring. The elastic protrusion (6) is fixedly connected to a cable. The free end of the cable passes through the first rod (1) and is connected to an adjustment device.
5. The auxiliary device for laryngeal mask placement according to claim 4, characterized in that: The adjustment device includes a stop ball (7) and a stop buckle (8). A horizontal groove (9) is formed on the circumference of the first rod body (1). A cable hole (10) is formed in the horizontal groove (9). The free end of the cable passes through the cable hole (10) and is fixedly connected to the stop ball (7). The stop ball (7) is engaged with the stop buckle (8).
6. The auxiliary device for placing a laryngeal mask according to any one of claims 1-5, characterized in that: The diameters of the first rod (1) and the second rod (2) are smaller than the diameter of the ventilator tube of the laryngeal mask.
7. The auxiliary device for placing a laryngeal mask according to any one of claims 1-5, characterized in that: The first rod (1) is a cylindrical rod, and the second rod (2) is a cylindrical rod.
8. The auxiliary device for placing a laryngeal mask according to claim 1, characterized in that: The hand-held part is a handle.
9. The auxiliary device for placing a laryngeal mask according to claim 3, characterized in that: The forward-rotating wheel (513) and the reverse-rotating wheel (523) are positioned close to the handheld part.
10. The auxiliary device for laryngeal mask placement according to claim 5, characterized in that: The elastic protrusion (6) matches the recessed area of the laryngeal mask.