Auxiliary protection device for trachea cannula and application method of auxiliary protection device

Abstract

The invention relates to an auxiliary protection device for tracheal intubation and an application method thereof.The auxiliary protection device comprises an upper arc-shaped limiting plate, an upper guide plate, a lower arc-shaped limiting plate and a lower guide plate, and the upper arc-shaped limiting plate and the lower arc-shaped limiting plate are each provided with a tooth limiting part; the upper arc-shaped limiting plate and the lower arc-shaped limiting plate are fixedly connected through a connecting rod; an upper connecting block is longitudinally hinged to the lower end of the upper guide 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 guide 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; by means of the method, open mouth pliers do not need to be additionally used, the whole operation process can be completed within five seconds, the problems that a traditional denture mode is inconvenient to operate and long in consumed time are solved, and precious time is saved for rescue.

Description

Technical Field

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

[0002] In medical emergency scenarios, endotracheal intubation is an important means to maintain the patient's airway patency and ensure effective ventilation. However, when facing patients in shock and restlessness, emergency endotracheal intubation is often a huge challenge. The patient may clench his teeth due to lack of self-control, and even accidentally injure the operator in the involuntary biting action. At the same time, in order to overcome the patient's restlessness, when medical staff operate the laryngoscope, the blade part is easy to collide with the patient's upper and lower incisors, causing tooth damage. In order to solve this problem, doctors often use a mouthpiece to support the teeth during intubation. This approach can better protect the doctor and keep the teeth away from the laryngoscope. However, the existing mouthpiece is separated from the laryngoscope, and the mouthpiece usually consists of an upper bracket and a lower bracket. The upper bracket and the lower bracket are opened in the longitudinal direction to support the teeth, and tooth positioning grooves are provided on the upper bracket and the lower bracket. The overall structure of this mouthpiece is block-shaped, which is not easy to put into the patient's mouth. It is often necessary to use an opening forceps to initially fix the oral cavity before inserting and adjusting the mouthpiece. The operation is difficult and will waste 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

[0003] The technical problem to be solved by the present invention is to provide an auxiliary protection device for endotracheal intubation and an application method of the auxiliary protection device for endotracheal intubation in view of the above-mentioned defects of the prior art.

[0004] The technical solution adopted by the present invention to solve its technical problem is: The tooth limiting element is a tooth limiting element for limiting the position of the tooth outer surface. The upper distance adjusting unit is used to adjust the distance between the upper and lower arc limit plates; the upper distance adjusting unit and the lower distance adjusting unit are linked by a linkage assembly; an upper profiling unit is also provided on the upper arc limit plate, and the upper profiling unit is used to control the upper end of the upper guide plate to move toward the upper end of the upper arc limit plate and move upward a set distance when the lower end of the upper guide plate moves close to the upper arc limit plate; a lower profiling unit is also provided on the lower arc limit plate, and the lower profiling unit is used to control the lower end of the lower guide plate to move toward the lower end of the lower arc limit plate and move downward a set distance when the upper end of the lower guide plate moves 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 by the lower ends of the tooth limiting parts corresponding to the elastic strips.

[0005] The auxiliary protection device for endotracheal intubation described in the present invention, wherein 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 limit plate or the lower arc-shaped limit plate, and the other end is provided with a roller shaft; the roller shaft is movably arranged in the profiling groove; the profiling groove is arranged on the upper guide plate or the lower guide plate.

[0006] The auxiliary protection device for endotracheal intubation described in the present invention, wherein 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, and 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.

[0007] The auxiliary protection device for endotracheal intubation described in the present invention is characterized in that a sliding limit sleeve is provided on the pull-out plate, and the sliding limit sleeve is fixedly connected to the adjacent support rod; when the upper connecting block or the lower connecting block is in contact with the corresponding sliding limit sleeve, the corresponding elastic strip is combined with the corresponding tooth limiting part to form a tooth positioning groove.

[0008] The auxiliary protection device for endotracheal intubation described in the present invention, wherein the locking unit includes a ratchet, a limit bar and a reset torsion spring for resetting the limit bar arranged on the pull-out plate; the limit bar is L-shaped and its transverse 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; and a reset spring for resetting the pull-out plate is arranged in the slide groove.

[0009] The auxiliary protection device for endotracheal intubation described in the present invention, wherein the linkage assembly includes a linkage frame, and the two pull-out plates are fixedly connected to the upper side and the lower side of the linkage frame respectively; the inner hole of the linkage frame is used for the passage of the trachea.

[0010] The auxiliary protection device for endotracheal intubation of the present invention, wherein a handle is provided on the linkage frame.

[0011] A method for applying an auxiliary protection device for an endotracheal tube, using the auxiliary protection device for an endotracheal tube as described above, wherein the method comprises: An upper arc-shaped limit plate, a lower arc-shaped limit plate and two connecting rods form a limit frame as the main structure of the auxiliary protection device, and an upper guide plate and a lower guide plate are respectively connected to the limit frame through an upper distance adjustment unit and a lower distance adjustment unit and serve as a gradually expanding head of the auxiliary protection device; When in use, the upper guide plate and the lower guide plate are inserted into the patient's oral cavity, and the teeth are separated by the upper guide plate and the lower guide plate, and the insertion is stopped when the upper and lower tooth limit parts respectively correspond to the outer surfaces of the upper teeth and the outer surfaces of the lower teeth of the patient; The operating linkage assembly drives the upper distance adjusting unit and the lower distance adjusting unit to operate, and the corresponding adjustment upper connecting block moves toward the upper arc-shaped limit plate and the lower connecting block moves toward the lower arc-shaped limit plate. Under the action of the upper profiling unit and the lower profiling unit, the upper end of the upper guide plate moves toward the upper end of the upper arc-shaped limit plate and moves upward by a set distance. At the same time, the lower end of the lower guide plate moves toward the lower end of the lower arc-shaped limit plate and moves downward by a set distance, so that the two elastic strips are respectively combined with the corresponding tooth limiting parts to form two tooth positioning grooves to position the upper and lower teeth.

[0012] The beneficial effects of the present invention are as follows: a limit frame is formed by an upper arc limit plate, a lower arc limit plate and two connecting rods, which serves as the main structure of the auxiliary protection device; an upper guide plate and a lower guide plate are respectively connected to the limit frame through an upper distance adjustment unit and a lower distance adjustment unit and serve as a gradually expanding head of the auxiliary protection device; When in use, the upper guide plate and the lower guide plate are inserted into the patient's oral cavity, and the teeth are separated by the upper guide plate and the lower guide plate, and the insertion is stopped when the upper and lower tooth limit parts respectively correspond to the outer surfaces of the upper teeth and the outer surfaces of the lower teeth of the patient; The operation linkage assembly drives the upper distance adjustment unit and the lower distance adjustment unit to operate, and the corresponding adjustment upper connecting block moves toward the upper arc-shaped limit plate and the lower connecting block moves toward the lower arc-shaped limit plate. Under the action of the upper profiling unit and the lower profiling unit, the upper end of the upper guide plate moves toward the upper end of the upper arc-shaped limit plate and moves upward by a set distance, and the lower end of the lower guide plate moves toward the lower end of the lower arc-shaped limit plate and moves downward by a set distance, so that the two elastic strips are respectively combined with the corresponding tooth limiting parts to form two tooth positioning grooves to position the upper and lower teeth; By applying the method of the present application, during the stage of inserting the tooth into the oral cavity, the upper guide plate and the lower guide plate can be well utilized to open the oral cavity, and the tooth can be inserted into the upper and lower tooth limit parts, respectively corresponding to the outer surfaces of the upper and lower teeth of the patient and fitting therewith as a reference, thereby preventing excessive insertion, and then utilizing the linkage assembly 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, thereby reducing possible accidental touching of the inside of the oral cavity, and at the same time, the upper end of the upper guide plate and the lower end of the lower guide plate can also drive the elastic strip to stretch, forming a tooth positioning groove with the tooth limit part to position the teeth, without the need for additional opening pliers, and the entire operation process can be completed within 5 seconds, thereby solving the problems of inconvenient operation and long time consumption of the traditional mouthpiece method, thereby saving precious time for rescue. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the present invention will be further described below in conjunction with the accompanying drawings and embodiments. The drawings described below are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative work: Figure 1 It is a cross-sectional view of the structure of the auxiliary protection device for the endotracheal tube according to a preferred embodiment of the present invention. DETAILED DESCRIPTION

[0014] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the following will be described clearly and completely in combination with the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are partial embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work belong to the protection scope of the present invention.

[0015] The auxiliary protection device of the endotracheal tube of the preferred embodiment of the present invention is as follows Figure 1As shown, it includes an upper arc-shaped limiting plate 1, an upper guide plate 2, a lower arc-shaped limiting plate 3 and a lower guide plate 4. The upper arc-shaped surface upper end of the upper arc-shaped limiting plate 1 and the lower arc-shaped surface lower end of the lower arc-shaped limiting plate 3 are both provided with tooth limiting parts 10 that fit the outer surface of the teeth; the left and right ends of the upper arc-shaped limiting plate 1 are respectively fixedly connected with the left and right ends of the lower arc-shaped limiting plate 3 by connecting rods 6 ( Figure 1 There is only one connecting rod 6 shown in the figure, and it does not block the opening of the linkage frame 70), the upper arc limit plate 1, the lower arc limit plate 3 and the two connecting rods 6 form a limit frame; the lower end of the upper guide plate 2 is longitudinally hinged with an upper connecting block 20, and the upper arc limit plate 1 is provided with an upper distance adjustment unit 11 for adjusting the distance between the upper connecting block 20 and the upper arc limit plate 1; the upper end of the lower guide plate 4 is longitudinally hinged with a lower connecting block 40, and the lower arc limit plate 3 is provided with a lower distance adjustment unit 31 for adjusting the distance between the lower connecting block 40 and the lower arc limit plate 3; the upper distance adjustment unit 11 and the lower distance adjustment unit 31 are linked by a linkage assembly 7; the upper arc limit plate 1 An upper profiling unit 12 is also provided on the upper portion, and the upper profiling unit 12 is used to control the upper end of the upper guide plate 2 to move toward the upper end of the upper arc-shaped limiting plate 1 and move upward by a set distance when the lower end of the upper guide plate 2 moves close to the upper arc-shaped limiting plate 1; a lower profiling unit 32 is also provided on the lower arc-shaped limiting plate 3, and the lower profiling unit 32 is used to control the lower end of the lower guide plate 4 to move toward the lower end of the lower arc-shaped limiting plate 3 and move downward by a set distance when the upper end of the lower guide plate 4 moves close to the lower arc-shaped limiting plate 3; the upper end of the upper guide plate 2 and the lower end of the lower guide plate 4 are respectively connected through the lower ends of the tooth limiting portions 10 corresponding to the elastic strips 8; The upper arc-shaped limit plate 1, the lower arc-shaped limit plate 3 and the two connecting rods 6 form a limit frame as the main structure of the auxiliary protection device. The upper guide plate 2 and the lower guide plate 4 are connected to the limit frame through the upper distance adjustment unit 11 and the lower distance adjustment unit 31 respectively and serve as the gradually expanding head of the auxiliary protection device. When in use, the upper guide plate 2 and the lower guide plate 4 are inserted into the patient's oral cavity, and the teeth are separated by the upper guide plate 2 and the lower guide plate 4, and the insertion is stopped when the upper and lower tooth stopper portions 10 are respectively in contact with the outer surfaces of the upper and lower teeth of the patient; The operation linkage assembly 7 drives the upper distance adjustment unit 11 and the lower distance adjustment unit 31 to operate, and the corresponding upper connection block 20 is adjusted to move toward the upper arc-shaped limit plate 1 and the lower connection block 40 is adjusted to move toward the lower arc-shaped limit 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 toward the upper end of the upper arc-shaped limit plate 1 and moves upward by a set distance, and the lower end of the lower guide plate 4 moves toward the lower end of the lower arc-shaped limit plate 3 and moves downward by a set distance, so that the two elastic strips 8 are respectively combined with the corresponding tooth limiting parts 10 to form two tooth positioning grooves 13 to position the upper and lower teeth; By using the method and technique of the present application, during the stage of inserting the tooth into the oral cavity, the upper guide plate 2 and the lower guide plate 4 can be well utilized to open the oral cavity, and the tooth is inserted into the upper and lower tooth limiting parts 10, which correspond to the outer surfaces of the upper and lower teeth of the patient and are respectively fitted to the outer surfaces of the lower teeth, so as to prevent excessive insertion. Then, the linkage component 7 is utilized to drive the upper distance adjustment unit 11 and the lower distance adjustment unit 31 to respectively retract the upper guide plate 2 and the lower guide plate 4 (front end), so as to reduce possible accidental touching of 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 will also drive the elastic strip 8 to stretch, and form a tooth positioning groove 13 with the tooth limiting part 10 to position the teeth, without the need to use an additional opening forceps, and the entire operation process can be completed within 5 seconds, thus solving the problems of inconvenience and time-consuming operation of the traditional mouthpiece method, and saving precious time for rescue. It should be noted that when used in the present application, the upper arc limit plate 1 and the lower arc limit plate 3 should not be set too long, and the length is preferably about the width of six to eight teeth including two front teeth; a silicone layer can be provided on the surface of the upper arc limit plate 1 and the lower arc limit plate 3 to provide protection for the oral cavity.

[0016] Preferably, the upper profiling unit 12 and the lower profiling unit 32 both 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; by adopting this movable connection mode, 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 to complete the stretching operation of the elastic strip 8; the overall structure is simple, the reliability is good, the volume is very small, and the control accuracy is high; in addition, since a purely mechanical structure is adopted, no electric power or other drive is involved, and the safety is also relatively high.

[0017] Preferably, the upper distance adjustment unit 11 and the lower distance adjustment unit 31 both include a pull-out plate 110 and a locking unit 111 for locking the pull-out plate in the front and rear positions, and the upper arc limit plate 1 and the lower arc limit plate 3 are both provided with a slide groove 14 for the pull-out plate 110 to slide; the structure is simple and the reliability is good.

[0018] Preferably, a sliding limit sleeve 112 is provided on the pull-out plate 110, and the sliding limit sleeve 112 is fixedly connected to the adjacent support rod 120; when the upper connecting block 20 or the lower connecting block 40 is in contact with the corresponding sliding limit sleeve 112, the corresponding elastic strip 8 is combined with the corresponding tooth limiting portion 10 to form a tooth positioning groove; with this design, the sliding limit sleeve 112 is used to ensure the stability of the movement of the front end of the pull-out plate 110, and it also plays a limiting role to avoid excessive movement of the upper end of the upper guide plate 2 or the lower end of the lower guide plate 4, thereby achieving the effect of improving both safety and stability.

[0019] Preferably, the locking unit 111 includes a ratchet 1110, a limit bar 1111 and a reset torsion spring 1112 for resetting the limit bar, which are arranged on the pull-out plate 110; the limit bar 1111 is L-shaped, and the transverse side is rotatably connected with the upper arc limit plate 1 or the lower arc limit plate 3, and the longitudinal side cooperates with the ratchet 1110; the reset torsion spring 1112 is used to reset the limit bar 1111; a reset spring 140 for resetting the pull-out plate 110 is arranged in the slide groove 14; With this structural design, when the pull-out plate 110 is pulled outward, the ratchet 1110 will slide across the limit bar 1111 and make a clicking prompt sound under the impact of the limit bar 1111. When the pull-out plate 110 is pulled into place, the reset spring 140 is stretched or compressed, and the limit bar 1111 clamps the ratchet 1110 to prevent the pull-out plate 110 from returning inward, thereby completing the locking. When unlocking, the limit bar 1111 is rotated, and the reset spring 140 restores its deformation, driving the pull-out plate 110 to automatically return, the upper guide plate 2 and the lower guide plate 4 are reset, the two tooth positioning grooves disappear, the positioning of the teeth is released, and the device can be smoothly removed; the usability and convenience of the device are greatly improved.

[0020] Preferably, the linkage assembly 7 includes a linkage frame 70, and two pull-out plates 110 are fixedly connected to the upper side and lower side of the linkage frame 70 respectively; the inner hole of the linkage frame 70 is used for the passage of the air supply pipe, and a handle 71 is provided on the linkage frame 70; when performing the insertion operation, the handle 71 or the linkage frame 70 is held to perform the insertion operation. At this time, the upper connecting block 20 and the lower connecting block 40 are directly connected to the linkage frame 70 through the pull-out plate, and will not move relative to the upper arc limit plate 1 and the lower arc limit plate 3, thereby ensuring the structural reliability during insertion; after being inserted into place, the teeth contact the two tooth limit parts 10, at this time, the upper arc limit plate 1 and the lower arc limit plate 3 are pressed respectively with two fingers, and then the handle 71 is pulled outward, so that the upper connecting block 20 and the lower connecting block 40 can be driven to move relative to the upper arc limit plate 1 and the lower arc limit plate 3, and the corresponding elastic strip 8 is pulled to combine with the corresponding tooth limit part 10 to form a tooth positioning groove; the structure is simple, easy to operate, and low in cost.

[0021] A method for applying an auxiliary protection device for an endotracheal tube, using the auxiliary protection device for an endotracheal tube as described above, wherein the method comprises: An upper arc-shaped limit plate, a lower arc-shaped limit plate and two connecting rods form a limit frame as the main structure of the auxiliary protection device, and an upper guide plate and a lower guide plate are respectively connected to the limit frame through an upper distance adjustment unit and a lower distance adjustment unit and serve as a gradually expanding head of the auxiliary protection device; When in use, the upper guide plate and the lower guide plate are inserted into the patient's oral cavity, and the teeth are separated by the upper guide plate and the lower guide plate, and the insertion is stopped when the upper and lower tooth limit parts respectively correspond to the outer surfaces of the upper teeth and the outer surfaces of the lower teeth of the patient; The operation linkage assembly drives the upper distance adjustment unit and the lower distance adjustment unit to operate, and the corresponding adjustment upper connecting block moves toward the upper arc-shaped limit plate and the lower connecting block moves toward the lower arc-shaped limit plate. Under the action of the upper profiling unit and the lower profiling unit, the upper end of the upper guide plate moves toward the upper end of the upper arc-shaped limit plate and moves upward by a set distance, and the lower end of the lower guide plate moves toward the lower end of the lower arc-shaped limit plate and moves downward by a set distance, so that the two elastic strips are respectively combined with the corresponding tooth limiting parts to form two tooth positioning grooves to position the upper and lower teeth; By applying the method of the present application, during the stage of inserting the tooth into the oral cavity, the upper guide plate and the lower guide plate can be well utilized to open the oral cavity, and the tooth can be inserted into the upper and lower tooth limit parts, respectively corresponding to the outer surfaces of the upper and lower teeth of the patient and fitting therewith as a reference, thereby preventing excessive insertion, and then utilizing the linkage assembly 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, thereby reducing possible accidental touching of the inside of the oral cavity, and at the same time, the upper end of the upper guide plate and the lower end of the lower guide plate can also drive the elastic strip to stretch, forming a tooth positioning groove with the tooth limit part to position the teeth, without the need for additional opening pliers, and the entire operation process can be completed within 5 seconds, thereby solving the problems of inconvenient operation and long time consumption of the traditional mouthpiece method, thereby saving precious time for rescue.

[0022] It should be understood that those skilled in the art can make improvements or changes based on the above description, and all these improvements and changes should fall within the scope of protection of the appended claims of the present invention.

Claims

1. An auxiliary protection device for endotracheal intubation, characterized in that: The tooth limiting member is a tooth limiting member that is fixedly connected to the tooth outer surface of the tooth and is used for limiting the position of the tooth outer surface of the tooth; the left and right ends of the upper and lower arc limit plates are respectively fixedly connected to the left and right ends of the lower arc limit plate by connecting rods, and the upper and lower arc limit plates and the two connecting rods form a limit frame; the lower end of the upper guide plate is longitudinally hinged with an upper connecting block, and an upper distance adjusting unit is provided on the upper arc limit plate for adjusting the distance between the upper connecting block and the upper arc limit plate; the upper end of the lower guide plate is longitudinally hinged with a lower connecting block, and the lower arc limit plate is provided with a lower distance adjusting unit for adjusting the distance between the lower connecting block and the lower arc limit plate The upper distance adjusting unit of the spacing; the upper distance adjusting unit and the lower distance adjusting unit are linked by a linkage component; the upper arc limit plate is also provided with an upper profiling unit, and the upper profiling unit is used to control the upper end of the upper guide plate to move toward the upper end of the upper arc limit plate and move upward a set distance when the lower end of the upper guide plate moves close to the upper arc limit plate; the lower arc limit plate is also provided with a lower profiling unit, and the lower profiling unit is used to control the lower end of the lower guide plate to move toward the lower end of the lower arc limit plate and move downward a set distance when the upper end of the lower guide plate moves 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 by the lower ends of the tooth limiting parts corresponding to the elastic strips.

2. The auxiliary protection device for endotracheal intubation according to claim 1, characterized in that: 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 shaft; the roller shaft is movably arranged in the profiling groove; the profiling groove is arranged on the upper guide plate or the lower guide plate.

3. The auxiliary protection device for endotracheal intubation according to claim 2, 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.

4. The auxiliary protection device for endotracheal intubation according to claim 3, 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.

5. The auxiliary protection device for endotracheal intubation according to claim 3, 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.

6. The auxiliary protection device for endotracheal tube according to claim 3, 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.

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

8. A method for using an auxiliary protection device for endotracheal intubation, using the auxiliary protection device for endotracheal intubation as claimed in any one of claims 1 to 7, characterized in that: The method comprises: An upper arc-shaped limit plate, a lower arc-shaped limit plate and two connecting rods form a limit frame as the main structure of the auxiliary protection device, and an upper guide plate and a lower guide plate are respectively connected to the limit frame through an upper distance adjustment unit and a lower distance adjustment unit and serve as a gradually expanding head of the auxiliary protection device; When in use, the upper guide plate and the lower guide plate are inserted into the patient's oral cavity, and the teeth are separated by the upper guide plate and the lower guide plate, and the insertion is stopped when the upper and lower tooth limit parts respectively correspond to the outer surfaces of the upper teeth and the outer surfaces of the lower teeth of the patient; The operating linkage assembly drives the upper distance adjusting unit and the lower distance adjusting unit to operate, and the corresponding adjustment upper connecting block moves toward the upper arc-shaped limit plate and the lower connecting block moves toward the lower arc-shaped limit plate. Under the action of the upper profiling unit and the lower profiling unit, the upper end of the upper guide plate moves toward the upper end of the upper arc-shaped limit plate and moves upward by a set distance. At the same time, the lower end of the lower guide plate moves toward the lower end of the lower arc-shaped limit plate and moves downward by a set distance, so that the two elastic strips are respectively combined with the corresponding tooth limiting parts to form two tooth positioning grooves to position the upper and lower teeth.

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