An auxiliary protection device for tracheal intubation and its application method

Abstract

The present invention relates to an auxiliary protection device for tracheal intubation and its application method, which includes an upper arc-shaped limiting plate, an upper guiding plate, a lower arc-shaped limiting plate and a lower guiding plate. Tooth limiting parts are arranged on both the upper arc-shaped limiting plate and the lower arc-shaped limiting plate; the upper arc-shaped limiting plate and the lower arc-shaped limiting plate are fixedly connected by a connecting rod; the lower end of the upper guiding plate is longitudinally hinged with an upper connecting block, and an upper distance adjusting unit for adjusting the distance between the upper connecting block and the upper arc-shaped limiting plate is arranged on the upper arc-shaped limiting plate; the upper end of the lower guiding plate is longitudinally hinged with a lower connecting block, and a lower distance adjusting unit for adjusting the distance between the lower connecting block and the lower arc-shaped limiting plate is arranged on the lower arc-shaped limiting plate; the upper distance adjusting unit and the lower distance adjusting unit are linked by a linkage assembly; by applying the method of the present application, there is no need to additionally use an oral speculum, and the entire operation process can be completed within 5 seconds, solving the problems of inconvenient operation and long time consumption of the traditional dental tray method, and saving precious time for rescue.

Description

Technical Field

[0001] The present invention relates to the technical field of medical first aid auxiliary devices, and more specifically, to an auxiliary protection device for tracheal intubation and an application method thereof. Background Art

[0002] In medical first aid scenarios, tracheal intubation is an important means to maintain the patency of the patient's airway and ensure effective ventilation. However, when faced with patients in shock or restlessness who require emergency tracheal intubation, the operation often poses great challenges. The patient may tightly close their teeth due to loss of self-control and even accidentally injure the operator during involuntary biting movements. At the same time, in order to overcome the patient's restlessness, when the medical staff operates the laryngoscope, the lens part is easily collided with the upper and lower front teeth of the patient, resulting in tooth damage.

[0003] To solve this problem, doctors often use a dental tray to support the teeth during intubation. This method can better protect the doctor and keep the teeth away from the laryngoscope. However, the existing dental trays are separately arranged from the laryngoscope, and the dental tray usually consists of an upper tray and a lower tray. The upper tray and the lower tray are opened longitudinally to support the teeth, and tooth positioning grooves are provided on both the upper tray and the lower tray. The overall shape of this dental tray is blocky and not easy to be put into the patient's mouth. Usually, an additional mouth gag is needed for preliminary oral fixation, and then the dental tray is put in and adjusted. The operation is difficult and also wastes precious rescue time. There is a need for an auxiliary protection device for tracheal intubation and an application method thereof that can solve the above problems. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide an auxiliary protection device for tracheal intubation and an application method of the auxiliary protection device for tracheal intubation in view of the above defects of the prior art.

[0005] The technical solution adopted by the present invention to solve its technical problems is:

[0006] An auxiliary protection device for an endotracheal tube is constructed, which includes an upper arc-shaped limiting plate, an upper guiding plate, a lower arc-shaped limiting plate and a lower guiding plate. Tooth limiting parts for limiting and fitting the outer surface of the teeth are arranged on the upper end of the arc-shaped surface of the upper arc-shaped limiting plate and the lower end of the arc-shaped surface of the lower arc-shaped limiting plate respectively; the left and right ends of the upper arc-shaped limiting plate are respectively fixedly connected with the left and right ends of the lower arc-shaped limiting plate through connecting rods, and the upper arc-shaped limiting plate, the lower arc-shaped limiting plate and the two connecting rods form a limiting frame; an upper connecting block is longitudinally hinged to the lower end of the upper guiding plate, and an upper distance adjusting unit for adjusting the distance between the upper connecting block and the upper arc-shaped limiting plate is arranged on the upper arc-shaped limiting plate; a lower connecting block is longitudinally hinged to the upper end of the lower guiding plate, and a lower distance adjusting unit for adjusting the distance between the lower connecting block and the lower arc-shaped limiting plate is arranged on the lower arc-shaped limiting plate; the upper distance adjusting unit and the lower distance adjusting unit are linked through a linkage assembly; an upper profiling unit is further arranged on the upper arc-shaped limiting plate, and the upper profiling unit is used for controlling the upper end of the upper guiding plate to move towards the upper end of the upper arc-shaped limiting plate and move upward by a set distance while the lower end of the upper guiding plate approaches the upper arc-shaped limiting plate; a lower profiling unit is further arranged on the lower arc-shaped limiting plate, and the lower profiling unit is used for controlling the lower end of the lower guiding plate to move towards the lower end of the lower arc-shaped limiting plate and move downward by a set distance while the upper end of the lower guiding plate approaches the lower arc-shaped limiting plate; the upper ends of the upper guiding plate and the lower ends of the lower guiding plate are respectively connected to the lower ends of the corresponding tooth limiting parts through elastic strips.

[0007] For the auxiliary protection device for an endotracheal tube according to the present invention, the upper profiling unit and the lower profiling unit both include a support rod and a profiling groove. One end of the support rod is fixedly connected to the upper arc-shaped limiting plate or the lower arc-shaped limiting plate, and the other end is provided with a roller; the roller is movably arranged in the profiling groove; the profiling groove is arranged on the upper guiding plate or the lower guiding plate.

[0008] For the auxiliary protection device for an endotracheal tube according to the present invention, the upper distance adjusting unit and the lower distance adjusting unit both include a pull-out plate and a locking unit for locking the front and rear positions of the pull-out plate. Sliding grooves for the pull-out plate to slide are arranged on both the upper arc-shaped limiting plate and the lower arc-shaped limiting plate.

[0009] For the auxiliary protection device for an endotracheal tube according to the present invention, a sliding limiting sleeve is sleeved on the pull-out plate, and the sliding limiting sleeve is fixedly connected to the adjacent support rod; when the upper connecting block or the lower connecting block fits with the corresponding sliding limiting sleeve, the corresponding elastic strip and the corresponding tooth limiting part form a tooth positioning groove.

[0010] The auxiliary protection device for tracheal intubation according to the present invention, wherein the locking unit includes a ratchet tooth, a limiting strip provided on the pulling plate, and a return torsion spring for resetting the limiting strip; the limiting strip is L-shaped, the horizontal side is rotatably connected to the upper arc-shaped limiting plate or the lower arc-shaped limiting plate, and the vertical side cooperates with the ratchet tooth; the return torsion spring is used to reset the limiting strip; a return spring for resetting the pulling plate is arranged in the sliding groove.

[0011] The auxiliary protection device for tracheal intubation according to the present invention, wherein the linkage assembly includes a linkage frame, and the two pulling plates are respectively fixedly connected to the upper side and the lower side of the linkage frame; the inner hole of the linkage frame is for the trachea to pass through.

[0012] The auxiliary protection device for tracheal intubation according to the present invention, wherein a handle is arranged on the linkage frame.

[0013] A method for applying an auxiliary protection device for tracheal intubation, applying the auxiliary protection device for tracheal intubation as described above, wherein the method includes:

[0014] A limiting frame is formed by the upper arc-shaped limiting plate, the lower arc-shaped limiting plate and two connecting rods as the main structure of the auxiliary protection device, and the upper guiding plate and the lower guiding plate are respectively connected to the limiting frame through the upper distance adjusting unit and the lower distance adjusting unit and serve as the gradually expanding heads of the auxiliary protection device;

[0015] When in use, the upper guiding plate and the lower guiding plate are inserted into the patient's oral cavity, and the teeth are separated by relying on the upper guiding plate and the lower guiding plate, and the insertion stops when the outer surfaces of the upper row of teeth and the lower row of teeth of the patient are respectively correspondingly attached to the upper tooth limiting part and the lower tooth limiting part.

[0016] Operate the linkage assembly to drive the upper distance adjusting unit and the lower distance adjusting unit to operate, correspondingly adjust the upper connecting block to move towards the upper arc-shaped limiting plate and the lower connecting block to move towards the lower arc-shaped limiting plate. Under the action of the upper profiling unit and the lower profiling unit, while the upper end of the upper guiding plate moves towards the upper end of the upper arc-shaped limiting plate, it moves upward by a set distance, and at the same time, while the lower end of the lower guiding plate moves towards the lower end of the lower arc-shaped limiting plate, it moves downward by a set distance, so that the two elastic strips respectively form two tooth positioning grooves with the corresponding tooth limiting parts to position the upper row of teeth and the lower row of teeth.

[0017] The beneficial effect of the present invention is that: a limiting frame is formed by the upper arc-shaped limiting plate, the lower arc-shaped limiting plate and two connecting rods as the main structure of the auxiliary protection device, and the upper guiding plate and the lower guiding plate are respectively connected to the limiting frame through the upper distance adjusting unit and the lower distance adjusting unit and serve as the gradually expanding heads of the auxiliary protection device;

[0018] During use, insert the upper guide plate and the lower guide plate into the patient's oral cavity. Rely on the upper guide plate and the lower guide plate to separate the teeth, and stop inserting when the upper and lower tooth limiting parts respectively correspond to and fit the outer surfaces of the patient's upper row of teeth and the outer surfaces of the lower row of teeth;

[0019] The operation linkage component drives the upper distance adjustment unit and the lower distance adjustment unit to operate, correspondingly adjusting the upper connecting block to move towards the upper arc-shaped limiting plate and the lower connecting block to move towards the lower arc-shaped limiting plate. Under the action of the upper profiling unit and the lower profiling unit, while the upper end of the upper guide plate moves towards the upper end of the upper arc-shaped limiting plate, it moves upward by a set distance. At the same time, while the lower end of the lower guide plate moves towards the lower end of the lower arc-shaped limiting plate, it moves downward by a set distance, so that the two elastic strips respectively form two tooth positioning grooves with the corresponding tooth limiting parts to position the upper row of teeth and the lower row of teeth;

[0020] Applying the method of the present application, in the stage of inserting into the oral cavity, the upper guide plate and the lower guide plate can be well utilized to open the oral cavity. Inserting is based on the fact that the upper and lower tooth limiting parts respectively correspond to and fit the outer surfaces of the patient's upper row of teeth and the outer surfaces of the lower row of teeth, which can prevent excessive insertion. Then, use the linkage component to drive the upper distance adjustment unit and the lower distance adjustment unit to retract the upper guide plate and the lower guide plate respectively, reducing possible accidental touches to the inside of the oral cavity. At the same time, the upper end of the upper guide plate and the lower end of the lower guide plate will also drive the elastic strips to stretch, forming tooth positioning grooves with the tooth limiting parts to position the teeth. There is no need to use an additional mouth gag, and the entire operation process can be completed within 5 seconds, solving the problems of inconvenient operation and long time consumption of the traditional dental tray method, saving precious time for rescue. Description of the Drawings

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will further illustrate the present invention in conjunction with the drawings and embodiments. The drawings in the following description are only partial embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings:

[0022] Figure 1 It is a structural sectional view of the auxiliary protection device for tracheal intubation in a preferred embodiment of the present invention. Detailed Embodiments

[0023] In order to make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are partial embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0024] The auxiliary protection device for an endotracheal tube according to a preferred embodiment of the present invention, as Figure 1 shown, includes an upper arc-shaped limiting plate 1, an upper guiding plate 2, a lower arc-shaped limiting plate 3 and a lower guiding plate 4. Tooth limiting portions 10 for limiting by fitting the outer surface of the teeth are provided on the upper end of the arc-shaped surface of the upper arc-shaped limiting plate 1 and the lower end of the arc-shaped surface of the lower arc-shaped limiting plate 3; the left and right ends of the upper arc-shaped limiting plate 1 and the left and right ends of the lower arc-shaped limiting plate 3 are fixedly connected correspondingly through a connecting rod 6 ( Figure 1 only one connecting rod 6 is shown in the figure, and it does not block the opening of the linkage frame 70), and the upper arc-shaped limiting plate 1, the lower arc-shaped limiting plate 3 and the two connecting rods 6 form a limiting frame; the lower end of the upper guiding plate 2 is longitudinally hinged with an upper connecting block 20, and an upper distance adjusting unit 11 for adjusting the distance between the upper connecting block 20 and the upper arc-shaped limiting plate 1 is provided on the upper arc-shaped limiting plate 1; the upper end of the lower guiding plate 4 is longitudinally hinged with a lower connecting block 40, and a lower distance adjusting unit 31 for adjusting the distance between the lower connecting block 40 and the lower arc-shaped limiting plate 3 is provided on the lower arc-shaped limiting plate 3; the upper distance adjusting unit 11 and the lower distance adjusting unit 31 are linked through a linkage assembly 7; an upper profiling unit 12 is further provided on the upper arc-shaped limiting plate 1, and the upper profiling unit 12 is used for controlling the upper end of the upper guiding plate 2 to move upward by a set distance while moving toward the upper end of the upper arc-shaped limiting plate 1 when the lower end of the upper guiding plate 2 approaches the upper arc-shaped limiting plate 1; a lower profiling unit 32 is further provided on the lower arc-shaped limiting plate 3, and the lower profiling unit 32 is used for controlling the lower end of the lower guiding plate 4 to move downward by a set distance while moving toward the lower end of the lower arc-shaped limiting plate 3 when the upper end of the lower guiding plate 4 approaches the lower arc-shaped limiting plate 3; the upper end of the upper guiding plate 2 and the lower end of the lower guiding plate 4 are respectively connected to the lower ends of the corresponding tooth limiting portions 10 through elastic strips 8;

[0025] A limiting frame is formed by the upper arc-shaped limiting plate 1, the lower arc-shaped limiting plate 3 and the two connecting rods 6 as the main structure of the auxiliary protection device, and the upper guiding plate 2 and the lower guiding plate 4 are respectively connected to the limiting frame through the upper distance adjusting unit 11 and the lower distance adjusting unit 31 and serve as the gradually expanding heads of the auxiliary protection device;

[0026] During use, the upper guiding plate 2 and the lower guiding plate 4 are inserted into the patient's oral cavity, and the teeth are separated by relying on the upper guiding plate 2 and the lower guiding plate 4, and the insertion stops when the upper and lower tooth limiting portions 10 respectively fit the outer surfaces of the patient's upper row of teeth and lower row of teeth;

[0027] The operation linkage component 7 drives the upper distance adjustment unit 11 and the lower distance adjustment unit 31 to operate. Correspondingly, the upper connecting block 20 is adjusted to move towards the upper arc-shaped limiting plate 1, and the lower connecting block 40 is adjusted to move towards the lower arc-shaped limiting plate 3. Under the action of the upper profiling unit 12 and the lower profiling unit 32, the upper end of the upper guide plate 2 moves towards the upper end of the upper arc-shaped limiting plate 1 while moving upward by a set distance. At the same time, the lower end of the lower guide plate 4 moves towards the lower end of the lower arc-shaped limiting plate 3 while moving downward by a set distance, so that the two elastic strips 8 respectively form two tooth positioning grooves 13 with the corresponding tooth limiting parts 10 to position the upper row of teeth and the lower row of teeth.

[0028] Applying the method of the present application, during the stage of extending into the oral cavity, the upper guide plate 2 and the lower guide plate 4 can be well utilized to open the oral cavity. Extending with the outer surfaces of the upper row of teeth and the lower row of teeth of the patient respectively corresponding to and fitting the two tooth limiting parts 10 as a reference can prevent excessive extension. Then, the linkage component 7 is used to drive the upper distance adjustment unit 11 and the lower distance adjustment unit 31 to retract the upper guide plate 2 and the lower guide plate 4 (front end) respectively, reducing the possible accidental touch to the inside of the oral cavity. At the same time, the upper end of the upper guide plate 2 and the lower end of the lower guide plate 4 also drive the elastic strips 8 to stretch, forming tooth positioning grooves 13 with the tooth limiting parts 10 to position the teeth. There is no need to use an additional mouth-opening pliers, and the entire operation process can be completed within 5 seconds, solving the problems of inconvenient operation and long time consumption of the traditional denture method, saving valuable time for rescue.

[0029] It should be noted that when the present application is used, the upper arc-shaped limiting plate 1 and the lower arc-shaped limiting plate 3 should not be set too long, and the length is preferably about the width of six to eight teeth including two incisors; a silica gel layer can be provided on the surfaces of the upper arc-shaped limiting plate 1 and the lower arc-shaped limiting plate 3 to provide protection for the oral cavity.

[0030] Preferably, both the upper profiling unit 12 and the lower profiling unit 32 include a support rod 120 and a profiling groove 121. One end of the support rod 120 is fixedly connected to the upper arc-shaped limiting plate 1 or the lower arc-shaped limiting plate 3, and the other end is provided with a roller 122; the roller 122 is movably arranged in the profiling groove 121; the profiling groove 121 is arranged on the upper guide plate 2 or the lower guide plate 4; adopting this kind of movable connection method, when the lower end of the upper guide plate 2 or the upper end of the lower guide plate 4 moves, the upper end of the upper guide plate 2 or the lower end of the lower guide plate 4 will move synchronously, completing the stretching operation of the elastic strip 8; the overall structure is simple, with good reliability, small volume, and high control accuracy; in addition, since it adopts a pure mechanical structure and does not involve driving such as electricity, the safety is also relatively high.

[0031] Preferably, both the upper distance adjustment unit 11 and the lower distance adjustment unit 31 include a draw plate 110 and a locking unit 111 for locking the front and rear positions of the draw plate. Sliding grooves 14 for the draw plate 110 to slide are provided on both the upper arc-shaped limiting plate 1 and the lower arc-shaped limiting plate 3; the structure is simple and the reliability is good.

[0032] Preferably, a sliding limiting sleeve 112 is sleeved on the draw plate 110, and the sliding limiting sleeve 112 is fixedly connected to the adjacent support rod 120; when the upper connecting block 20 or the lower connecting block 40 fits with the corresponding sliding limiting sleeve 112, the corresponding elastic strip 8 and the corresponding tooth limiting portion 10 are combined to form a tooth positioning groove; with this design, while using the sliding limiting sleeve 112 to ensure the stability of the front end movement of the draw plate 110, it also plays a limiting role to prevent the upper end of the upper guiding plate 2 or the lower end of the lower guiding plate 4 from moving excessively, achieving the effect of improving both safety and stability.

[0033] Preferably, the locking unit 111 includes a ratchet 1110, a limiting strip 1111 provided on the draw plate 110, and a return torsion spring 1112 for resetting the limiting strip; the limiting strip 1111 is L-shaped and the horizontal side is rotatably connected to the upper arc-shaped limiting plate 1 or the lower arc-shaped limiting plate 3, and the vertical side cooperates with the ratchet 1110; the return torsion spring 1112 is used to reset the limiting strip 1111; a return spring 140 for resetting the draw plate 110 is provided in the sliding groove 14;

[0034] With this structural design, when the draw plate 110 is pulled outwards, the ratchet 1110 will slide across the limiting strip 1111 and make a clicking prompt sound under the impact of the limiting strip 1111. When the draw plate 110 is pulled in place, the return spring 140 is stretched or compressed, and the limiting strip 1111 catches the ratchet 1110 to prevent the draw plate 110 from retracting inwards, completing the locking; when unlocking, just rotate the limiting strip 1111, the return spring 140 restores its deformation, drives the draw plate 110 to automatically retract, the upper guiding plate 2 and the lower guiding plate 4 are reset, and the two tooth positioning grooves disappear, releasing the positioning of the teeth, and the device can be taken out smoothly; greatly improving the usability and convenience of the device.

[0035] Preferably, the linkage assembly 7 includes a linkage frame 70, and the two pull-out plates 110 are respectively fixedly connected to the upper side and the lower side of the linkage frame 70; the inner hole of the linkage frame 70 is for the air pipe to pass through, and a handle 71 is arranged on the linkage frame 70; when performing the insertion operation, hold the handle 71 or the linkage frame 70 to perform the insertion operation. At this time, since the upper connecting block 20 and the lower connecting block 40 are directly connected to the linkage frame 70 through the pull-out plates, they will not move relative to the upper arc-shaped limiting plate 1 and the lower arc-shaped limiting plate 3, ensuring the structural reliability during insertion; after the insertion is in place, the teeth contact the two tooth limiting parts 10. At this time, press the upper arc-shaped limiting plate 1 and the lower arc-shaped limiting plate 3 with two fingers respectively, and then pull the handle 71 outwards, which can drive the upper connecting block 20 and the lower connecting block 40 to move relative to the upper arc-shaped limiting plate 1 and the lower arc-shaped limiting plate 3, and pull the corresponding elastic strips 8 and the corresponding tooth limiting parts 10 to form tooth positioning grooves; the structure is simple, the operation is convenient, and the cost is low.

[0036] A method for applying an auxiliary protection device for tracheal intubation, which applies the auxiliary protection device for tracheal intubation as described above. The method includes:

[0037] Form a limiting frame through the upper arc-shaped limiting plate, the lower arc-shaped limiting plate and two connecting rods as the main structure of the auxiliary protection device. The upper guiding plate and the lower guiding plate are respectively connected to the limiting frame through the upper distance adjusting unit and the lower distance adjusting unit and serve as the gradually expanding heads of the auxiliary protection device;

[0038] During use, insert the upper guiding plate and the lower guiding plate into the patient's oral cavity, rely on the upper guiding plate and the lower guiding plate to separate the teeth, and stop inserting when the upper and lower tooth limiting parts respectively correspond to and fit the outer surfaces of the upper row of teeth and the lower row of teeth of the patient;

[0039] Operate the linkage assembly to drive the upper distance adjusting unit and the lower distance adjusting unit to run, correspondingly adjust the upper connecting block to move towards the upper arc-shaped limiting plate and the lower connecting block to move towards the lower arc-shaped limiting plate. Under the action of the upper profiling unit and the lower profiling unit, while the upper end of the upper guiding plate moves towards the upper end of the upper arc-shaped limiting plate, it moves upwards by a set distance. At the same time, while the lower end of the lower guiding plate moves towards the lower end of the lower arc-shaped limiting plate, it moves downwards by a set distance, so that the two elastic strips and the corresponding tooth limiting parts respectively form two tooth positioning grooves to position the upper row of teeth and the lower row of teeth;

[0040] When applying the method of the present application, during the stage of inserting into the oral cavity, the upper guide plate and the lower guide plate can be well utilized to open the oral cavity. When inserting, taking the fact that the upper and lower tooth limiting parts respectively correspond to and fit the outer surfaces of the patient's upper row of teeth and the outer surfaces of the lower row of teeth as a reference, over-insertion can be prevented. Then, the linkage component is used to drive the upper distance adjustment unit and the lower distance adjustment unit to retract the upper guide plate and the lower guide plate respectively, reducing possible accidental touches to the interior of the oral cavity. At the same time, the upper end of the upper guide plate and the lower end of the lower guide plate will also drive the elastic strip to stretch, forming a tooth positioning groove with the tooth limiting part to position the teeth. There is no need to use an additional mouth gag, and the entire operation process can be completed within 5 seconds, solving the problems of inconvenient operation and long time consumption of the traditional denture method, saving precious time for rescue.

[0041] It should be understood that for those of ordinary skill in the art, improvements or transformations can be made according to the above description, and all such improvements and transformations should fall within the protection scope of the appended claims of the present invention.

Claims

1. An auxiliary protection device for endotracheal intubation, characterized in that: The tooth limiting portion that fits the outer surface of the tooth and limits the position of the tooth is arranged on the upper end of the arc surface of the upper arc limiting plate and the lower end of the arc surface of the lower arc limiting plate; the left and right ends of the upper arc limiting plate are respectively fixedly connected with the left and right ends of the lower arc limiting plate by connecting rods, and the upper arc limiting plate, the lower arc limiting plate and the two connecting rods form a limiting frame; the lower end of the upper guide plate is longitudinally hinged with an upper connecting block, and an upper distance adjusting unit for adjusting the distance between the upper connecting block and the upper arc limiting plate is arranged on the upper arc limiting plate; the upper end of the lower guide plate is longitudinally hinged with a lower connecting block, and a lower distance adjusting unit for adjusting the distance between the lower connecting block and the lower arc limiting plate is arranged on the lower arc limiting plate; the upper distance adjusting unit and the lower distance adjusting unit are linked by a linkage component; an upper profiling unit is also arranged on the upper arc limiting plate The camming unit is used for controlling the upper end of the upper guide plate to move toward the upper end of the upper arc limit plate and to move upward a set distance when the lower end of the upper guide plate is close to the upper arc limit plate; the lower arc limit plate is also provided with a lower contour unit, and the lower contour unit is used for controlling the lower end of the lower guide plate to move toward the lower end of the lower arc limit plate and to move downward a set distance when the upper end of the lower guide plate is close to the lower arc limit plate; the upper end of the upper guide plate and the lower end of the lower guide plate are respectively connected to the lower end of the tooth limiting portion corresponding to the elastic strip; the upper contour unit and the lower contour unit both include a support rod and a contour groove, one end of the support rod is fixedly connected to the upper arc limit plate or the lower arc limit plate, and the other end is provided with a roller shaft; the roller shaft is movably arranged in the contour groove; the contour groove is arranged on the upper guide plate or the lower guide plate.

2. The auxiliary protection device for endotracheal intubation according to claim 1, characterized in that: The upper distance adjustment unit and the lower distance adjustment unit both include a pull-out plate and a locking unit for locking the pull-out plate when adjusting the front and rear positions. The upper arc-shaped limit plate and the lower arc-shaped limit plate are both provided with a sliding groove for the pull-out plate to slide.

3. The auxiliary protection device for endotracheal intubation according to claim 2, characterized in that: The pull-out plate is provided with a sliding limit sleeve, and the sliding limit sleeve is fixedly connected to the adjacent support rod; when the upper connecting block or the lower connecting block is fitted with the corresponding sliding limit sleeve, the corresponding elastic strip is combined with the corresponding tooth limiting part to form a tooth positioning groove.

4. The auxiliary protection device for endotracheal intubation according to claim 2, characterized in that: The locking unit includes a ratchet, a limit bar and a reset torsion spring arranged on the pull-out plate; the limit bar is L-shaped and its lateral edge is rotatably connected to the upper arc limit plate or the lower arc limit plate, and its longitudinal edge cooperates with the ratchet; the reset torsion spring is used to reset the limit bar; a reset spring is arranged in the slide groove to reset the pull-out plate.

5. The auxiliary protection device for endotracheal intubation according to claim 2, characterized in that: The linkage assembly comprises a linkage frame, and the two pull-out plates are respectively fixedly connected to the upper side and the lower side of the linkage frame; the inner hole of the linkage frame is used for the air pipe to pass through.

6. The auxiliary protection device for endotracheal intubation according to claim 5, characterized in that: A handle is arranged on the linkage frame.

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