An adjustable anesthetic cannula for an oral cannula

Abstract

The application discloses an adjustable anesthetic cannula for an oral cavity cannula and relates to the technical field of anesthetic cannulas, which comprises a cannula body, one end of the cannula body is fixedly connected with an air bag a, the outer side of the cannula body is slidably connected with a bite plate, one end of the cannula body away from the air bag a is fixedly connected with a hard plastic tube, one end of the hard plastic tube is sleeved with a sleeve pipe, and one end of the sleeve pipe is fixedly connected with a hose. The adjustable anesthetic cannula for the oral cavity cannula is cooperated with the triple design of angle adjustment, double sealing and bite plate limiting, solves the pain points that the traditional cannula is easy to be inserted incorrectly due to the visual field shielding, the pipeline is bent due to the fixed interface angle, and the cannula is easy to be displaced, the movable bite plate guarantees the visual field of the cannula, the double-mode angle adjustment is adapted to the patient posture, the double sealing prevents drug overflow, the bite plate limiting fixes the cannula, the triple design takes into account the cannula accuracy, use adaptability and fixed stability, and improves the operation safety and patient comfort.

Description

Technical Field

[0001] This invention relates to the field of anesthesia intubation technology, specifically to an adjustable anesthesia cannula for oral intubation. Background Technology

[0002] Endotracheal intubation is the insertion of a specially designed endotracheal tube into the patient's trachea through the mouth or nose. It is a technique for endotracheal anesthesia and patient resuscitation, and is the most reliable means of maintaining an open upper airway. During general anesthesia, endotracheal intubation should be performed in cases where it is difficult to ensure airway patency, such as intracranial surgery, open-chest surgery, or surgery requiring a prone position; in patients where airway patency is difficult to maintain, such as those with tumors compressing the trachea; or in patients where general anesthetics significantly suppress respiration or where muscle relaxants are used. The advantages of endotracheal intubation include maintaining airway patency, facilitating assisted and artificial respiration, allowing the anesthesiologist to be away from the surgical area, and is particularly suitable for craniocerebral, maxillofacial, ENT, and neck surgeries. It can also reduce dead space in the airway for patients with respiratory failure, facilitating oxygen administration and assisted respiration.

[0003] As disclosed in invention publication number CN108837266A, an adjustable anesthesia cannula for oral intubation facilitates the fixation of rigid catheters, making it convenient for medical personnel to operate; it facilitates the opening of the patient's mouth, making it easy to insert the rigid catheter; the position of the positioning plate can be adjusted by adjusting the position of the positioning nut, thereby adjusting the insertion depth of the rigid catheter; it facilitates the delivery of anesthetic drugs and prevents the inner tube with the arc-shaped elastic rod from causing damage to the patient's oral cavity; it can guide the inner tube to prevent relative rotation between the inner tube and the rigid catheter; it allows the right end of the inner tube to bend automatically, facilitating the delivery of anesthetic drugs; the entire adjustable anesthesia cannula for oral intubation is easy to fix, allows for accurate control and adjustment of the insertion depth of the rigid catheter, and can protect the patient's oral cavity with a soft bulb to avoid injury to the patient, while facilitating the delivery of anesthetic drugs and being easy to use.

[0004] In the above-mentioned method, the anesthesia cannula is slowly and precisely inserted into the patient's mouth through an adjustment mechanism. However, since the occlusal plate is already bitten by the teeth before the cannula is inserted into the patient's mouth, it will close the patient's mouth, making it impossible for the operator to observe the situation in the patient's mouth. This can easily lead to errors in the insertion position of the cannula. Furthermore, since the connection between the cannula tip and the interface is fixed and cannot be rotated, it is difficult to make adaptive adjustments when the patient's head is tilted back or lying on their side. This can cause the externally connected tube to bend. The restoring force generated by the bent tube will pull the cannula to move, causing the cannula to compress the patient's oral mucosa and pharynx. Summary of the Invention

[0005] The purpose of this invention is to provide an adjustable anesthesia cannula for oral intubation, to solve the problems mentioned in the background art. In this invention, the anesthesia cannula is slowly and precisely inserted into the patient's mouth via an adjustment mechanism. However, because the occlusal plate is already bitten by the teeth before the cannula is inserted, the patient's mouth is sealed, making it impossible for the operator to observe the situation inside the patient's mouth. This easily leads to errors in cannula insertion position. Furthermore, because the connection between the cannula end and the interface is fixed and cannot be rotated, the interface is difficult to adjust adaptively when the patient's head is tilted back or lying on their side. This causes the externally connected tube to bend, and the restoring force generated by the bent tube pulls the cannula, causing the cannula to compress the patient's oral mucosa and pharynx.

[0006] To achieve the above objectives, the present invention provides the following technical solution: an adjustable anesthesia cannula for oral intubation, comprising a cannula body, one end of which is fixedly connected to an air bladder a; an occlusal plate is slidably connected to the outer side of the cannula body; a rigid plastic tube is fixedly connected to the end of the cannula body away from the air bladder a; a sleeve is sleeved at one end of the rigid plastic tube; a flexible tube is fixedly connected to one end of the sleeve; a connector tube is fixedly connected to one end of the flexible tube; an adjustment and fixing mechanism is provided inside the sleeve; the adjustment and fixing mechanism includes a locking rod fixedly connected inside the sleeve; multiple sets of fixing plates are fixedly connected to the bottom of the rigid plastic tube; a sealing mechanism is provided at the bottom of the rigid plastic tube; the sealing mechanism includes a fixing sleeve fixedly connected to the outer side of the bottom of the rigid plastic tube; a sealing ring abuts against the top of the fixing sleeve; an adjustment mechanism for adjusting the angle of the connector tube is provided on one side; and a limit mechanism is provided inside the occlusal plate.

[0007] Furthermore, a movable ring is provided at the top of the sleeve, and a ball is rotatably connected to the bottom of the movable ring. The outer side of the ball is rotatably connected to the top of the sleeve. A telescopic rod is fixedly connected to the top of the movable ring, and a fixed ring is fixedly connected to the top of the telescopic rod. The inner side of the fixed ring is fixed to a rigid plastic tube. A spring a is sleeved on the outer side of the telescopic rod. The top of the spring a abuts against the fixed ring, and the bottom of the spring a abuts against the movable ring. The locking rod is C-shaped, and a locking mechanism is provided at the bottom of the movable ring.

[0008] Furthermore, the engaging mechanism includes a fixed block fixedly connected to the top of the movable ring, an insert rod slidably connected inside the fixed block, a protrusion fixedly connected to the top of the insert rod, and a spring c abutting against one side of the protrusion. One end of the spring c abuts against the inner side of the fixed block, and one end of the insert rod engaging with a rigid plastic tube. A slot matching the insert rod is provided on one side of the rigid plastic tube.

[0009] Furthermore, the top of the fixed sleeve and the bottom of the sealing ring are both conical and abut against each other. A sliding rod is fixedly connected to the top of the sealing ring, and the outer side of the sliding rod is slidably connected to the sleeve. A piston plate is fixedly connected to the top of the sliding rod, and a cavity for the piston plate to slide is opened inside the sleeve.

[0010] Furthermore, a spring b is sleeved at the bottom of the slide rod, the bottom of the spring b abuts against the sealing ring, the top of the spring b abuts against the inner side of the sleeve, and an air pipe is connected to one side of the cavity.

[0011] Furthermore, the outer side of the trachea is fixed to the cannula, one end of the trachea is connected to an air bladder b, the outer side of the air bladder b is fixed to the cannula, one side of the air bladder b abuts against the fixing sleeve, and the outer side of the fixing sleeve has a groove, which is annular.

[0012] Furthermore, the adjustment mechanism includes a bracket fixedly connected to both sides of the sleeve, one end of the bracket being rotatably connected to the connector tube via a rotating shaft, a worm gear being fixedly connected to one side of the connector tube, a worm being meshed with the outer side of the worm gear, and the middle part of the worm being rotatably connected to the bracket via a bearing.

[0013] Furthermore, the limiting mechanism includes a push rod slidably connected to the bottom of the biting plate. The top of the push rod is wedge-shaped, and the top of the push rod abuts against a connecting block. The interior of the connecting block has an inclined groove that matches the push rod.

[0014] Furthermore, a pressing plate a is fixedly connected to one side of the connecting block, and two sets of springs d are abutted against one side of the pressing plate a. One end of the springs d is fixed to the inner side of the engagement plate.

[0015] Furthermore, a movable plate is slidably connected to one side of the biting plate, and a limiting rod is fixedly connected to one side of the movable plate. The outer side of the limiting rod is slidably connected to the biting plate. A pressing plate b is fixedly connected to one end of the limiting rod. Rubber pads are fixedly connected to one side of both the pressing plate b and the pressing plate a. A spring e is sleeved on the end of the limiting rod away from the biting plate. One end of the spring e abuts against the inner side of the biting plate, and the other end of the spring e abuts against the movable plate.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows: The adjustable anesthesia cannula for oral intubation solves the pain points of traditional intubation by synergistically combining angle adjustment, double sealing and occlusal plate limiting design. The movable occlusal plate ensures the intubation field of vision, the dual-mode angle adjustment adapts to the patient's posture, the double sealing prevents drug leakage, and the occlusal plate limits and fixes the cannula. The triple design takes into account the accuracy of intubation, the adaptability of use and the stability of fixation, thereby improving the safety of surgery and the comfort of patients.

[0017] 1. The angle adjustment and sealing structure effectively solves the problems of fixed angles in traditional intubation interfaces, which can easily lead to tube bending and compression of the patient's mucosa, and easy leakage of drugs at the connection. During intubation, the occlusal plate can be moved away from the oral cavity to avoid obstructing the field of vision and ensure accurate insertion of the tube. When the patient's posture changes, pulling the intubation rod unlocks the tube and pushes the sleeve to drive the locking rod away from the fixed plate. The sleeve can then be rotated to coarsely adjust the angle of the connector tube. After releasing, the spring returns to its original position and locks in place. Rotating the worm gear and engaging the worm wheel allows for fine adjustment of the angle, ensuring that the external tube is not bent and avoiding the return force pulling the intubation tube and compressing the mucosa. In terms of sealing, when the sleeve and the fixed sleeve are in contact, the sealing ring is pressed together by the spring to form an initial seal. At the same time, the piston plate compresses the gas, causing the air bladder b to expand and embed into the groove to form a secondary seal. This double protection prevents the leakage of anesthetic drugs and takes into account both angle adaptability and sealing reliability.

[0018] 2. The occlusal plate limiting structure precisely solves the problems of premature obstruction of vision and easy displacement and bending of the endotracheal tube caused by the traditional occlusal plate fixation. Before insertion, spring d pushes the compression plate a to fit against the endotracheal tube body, limiting the occlusal plate to prevent arbitrary movement. When adjustment is needed, push the push rod through the inclined groove to move the connecting block, so that the compression plate a is disengaged from the endotracheal tube, allowing the occlusal plate to move flexibly. After insertion, the patient bites the occlusal plate, and the compression moving plate drives the limiting rod to push the compression plate b to fit against the endotracheal tube. The double compression structure firmly fixes the endotracheal tube, preventing displacement or bending by the teeth, ensuring smooth drug delivery. The rubber pad prevents compression damage to the endotracheal tube and improves limiting stability. It meets the vision requirements during insertion and ensures the fixation effect after insertion, adapting to the needs of use throughout the entire surgical procedure. Attached Figure Description

[0019] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a schematic diagram of the three-dimensional cross-sectional structure of the present invention; Figure 3 This is a schematic diagram of the three-dimensional cross-sectional structure of the bite plate of the present invention; Figure 4 This is a schematic diagram of the three-dimensional cross-sectional structure of the rigid plastic tube of the present invention; Figure 5 For the present invention Figure 4 A magnified structural diagram at point A; Figure 6 This is a schematic diagram of the three-dimensional structure of the sleeve of the present invention; Figure 7 This is a schematic diagram of the three-dimensional structure of the movable plate of the present invention; Figure 8 This is a schematic diagram of the three-dimensional structure of the extrusion plate b of the present invention; Figure 9 For the present invention Figure 3 A magnified structural diagram at point B.

[0020] In the diagram: 1. Intubation tube body; 2. Airbag a; 3. Engaging plate; 4. Rigid plastic tube; 5. Sleeve; 6. Flexible tube; 7. Connector tube; 8. Clamping rod; 9. Fixing plate; 10. Moving ring; 11. Telescopic rod; 12. Spring a; 13. Fixing ring; 14. Sealing ring; 15. Sliding rod; 16. Spring b; 17. Fixing sleeve; 18. Piston plate; 19. Air tube; 20. Airbag b; 21. Groove; 22. Intubation rod; 23. Fixing block; 24. Spring c; 25. Clamping slot; 26. Push rod; 27. Connecting block; 28. Inclined groove; 29. ​​Compression plate a; 30. Spring d; 31. Moving plate; 32. Limiting rod; 33. Compression plate b; 34. Spring e; 35. Bracket; 36. Worm gear; 37. Worm. Detailed Implementation

[0021] 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 some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0022] Example 1: Please refer to Figures 1-3 The present invention provides the following technical solution: an adjustable anesthesia cannula for oral intubation, comprising a cannula body 1, one end of which is fixedly connected to an air bladder a2; an occlusal plate 3 is slidably connected to the outer side of the cannula body 1; a rigid plastic tube 4 is fixedly connected to the end of the cannula body 1 away from the air bladder a2; a sleeve 5 is sleeved at one end of the rigid plastic tube 4; a flexible tube 6 is fixedly connected to one end of the sleeve 5; a connector tube 7 is fixedly connected to one end of the flexible tube 6; an adjustment and fixing mechanism is provided inside the sleeve 5, the adjustment and fixing mechanism including a locking rod 8 fixedly connected inside the sleeve 5; multiple sets of fixing plates 9 are fixedly connected to the bottom of the rigid plastic tube 4; a sealing mechanism is provided at the bottom of the rigid plastic tube 4, the sealing mechanism including a fixing sleeve 17 fixedly connected to the outer side of the bottom of the rigid plastic tube 4; the fixing sleeve 1... The top of tube 7 is abutted by a sealing ring 14, and an adjustment mechanism for adjusting its angle is provided on one side of the connector tube 7. This adjustable anesthesia tube for oral intubation is used by opening the patient's mouth with a laryngoscope, and then slowly inserting the tube body 1 into the glottis until the cuff a2 passes below the glottis. After insertion, the cuff a2 can be inflated by an external air pump, thereby sealing the airway, isolating the digestive tract from the respiratory tract, and preventing the reflux of blood, saliva or gastric contents into the lungs during surgery, thus reducing the risk of complications such as pneumonia. Then, anesthetic drugs can be injected into the patient's body through the tube body 1 to anesthetize the patient. Since the occlusal plate 3 is movable, it can be moved away from the patient's mouth when inserting the tube body 1 to prevent obstruction of vision.

[0023] Please see Figures 2-4 and Figure 6 The top of the cannula 5 is provided with a movable ring 10, and the bottom of the movable ring 10 is rolled with a ball bearing. The outer side of the ball bearing is rolled with the top of the cannula 5. The top of the movable ring 10 is fixedly connected with a telescopic rod 11, and the top of the telescopic rod 11 is fixedly connected with a fixed ring 13. The inner side of the fixed ring 13 is fixed to the rigid plastic tube 4. The outer side of the telescopic rod 11 is sleeved with a spring a12. The top of the spring a12 abuts against the fixed ring 13, and the bottom of the spring a12 abuts against the movable ring 10. The locking rod 8 is C-shaped, and the bottom of the movable ring 10 is provided with a locking mechanism. When the patient needs to tilt their head back or lie on their side, in order to allow the connector tube 7 to adapt to the change of posture... Connecting the connector tube 7 to the external connecting tube without bending it requires adjusting the angle of the connector tube 7. This is done by pushing the sleeve 5 to move it. When the sleeve 5 moves, its top pushes the moving ring 10, causing the moving ring 10 to compress the multiple sets of springs a12 at the top, causing the telescopic rod 11 to move synchronously. At the same time, the sleeve 5 will drive the internally fixed locking rod 8 to move. When the locking rod 8 moves and disengages from the multiple sets of fixing plates 9, the sleeve 5 can be rotated to change the angle of the connector tube 7. After adjustment, the sleeve 5 can be released. At this time, the springs a12 will push the sleeve 5 to reset, causing the locking rod 8 to engage with the multiple sets of fixing plates 9 again, thus completing one adjustment of the angle of the sleeve 5 and the connector tube 7.

[0024] Please see Figures 4-5 The engaging mechanism includes a fixed block 23 fixedly connected to the top of the moving ring 10. A rod 22 is slidably connected inside the fixed block 23. A protrusion is fixedly connected to the top of the rod 22, and a spring c24 abuts against one side of the protrusion. One end of the spring c24 abuts against the inner side of the fixed block 23. One end of the rod 22 is engaged with the rigid plastic tube 4. A slot 25 matching the rod 22 is provided on one side of the rigid plastic tube 4. In order to prevent the sleeve 5 from moving arbitrarily and causing the adjustment to fail, a set of rods 22 is set at the top of the moving ring 10. The rods 22 will engage with the slot 25 on the outer side of the rigid plastic tube 4 under the elastic force of the spring c24 to prevent the sleeve 5 from moving upward. When it is necessary to move the sleeve 5 upward for adjustment, the rods 22 can be pulled to disengage from the rigid plastic tube 4. At this time, the sleeve 5 can be moved for adjustment.

[0025] Please see Figures 4-5The top of the fixed sleeve 17 and the bottom of the sealing ring 14 are both conical and abut against each other. A slide rod 15 is fixedly connected to the top of the sealing ring 14. The outer side of the slide rod 15 is slidably connected to the sleeve 5. A piston plate 18 is fixedly connected to the top of the slide rod 15. A cavity for the piston plate 18 to slide is opened inside the sleeve 5. A spring b16 is sleeved on the bottom of the slide rod 15. The bottom of the spring b16 abuts against the sealing ring 14, and the top of the spring b16 abuts against the inner side of the sleeve 5. An air pipe 19 is connected to one side of the cavity. At the same time, when the spring a12 pushes the sleeve 5 to fit against the fixed sleeve 17... The sealing ring 14 in the sleeve 5 will be squeezed, and the sealing ring 14 will squeeze the spring b16. The restoring force generated by the spring b16 will push the sealing ring 14 to press against the top of the fixed sleeve 17, completing the first seal. At the same time, the sealing ring 14 will push the piston plate 18 upward through the slide rod 15, thereby compressing the gas in the cavity. The compressed gas will enter the air bag b20 through the air tube 19, causing the air bag b20 to inflate. The inflated air bag b20 will fit against the outside of the fixed sleeve 17 and be embedded in the groove 21, completing the second seal and preventing the anesthetic drug from leaking out from the connection.

[0026] Please see Figures 2-4 The adjustment mechanism includes brackets 35 fixedly connected to both sides of the sleeve 5. One end of the bracket 35 is rotatably connected to the connector tube 7 via a rotating shaft. A worm gear 36 is fixedly connected to one side of the connector tube 7. A worm 37 is meshed with the outer side of the worm gear 36. The middle part of the worm 37 is rotatably connected to the bracket 35 via a bearing. When the angle of the connector tube 7 is adjusted for the second time, the worm 37 is rotated to mesh with the worm gear 36, which drives the worm gear 36 and the connector tube 7 fixed on one side to rotate. This makes the connector tube 7 more adaptable to the position of the external pipe and prevents the return force generated by the bending of the external pipe from pulling the insertion tube body 1 to move, causing the insertion tube body 1 to squeeze the patient's oral mucosa and pharynx.

[0027] Example 2: Please refer to Figures 1-3 and Figure 9Based on Embodiment 1, a limiting mechanism for limiting the occlusal plate 3 is also disclosed. Its specific structure is as follows: The occlusal plate 3 is internally provided with a limiting mechanism, which includes a push rod 26 slidably connected to the bottom of the occlusal plate 3. The top of the push rod 26 is wedge-shaped, and the top of the push rod 26 abuts against a connecting block 27. The connecting block 27 has an inclined groove 28 that matches the push rod 26. A compression plate a29 is fixedly connected to one side of the connecting block 27. Two sets of springs d30 abut against one side of the compression plate a29. One end of the springs d30 is fixed to the inner side of the occlusal plate 3. This adjustable anesthesia cannula for oral intubation prevents the occlusal plate 3 from moving arbitrarily within the cannula body 1, thus affecting the cannula's position. Insertion of the cannula body 1 is achieved by a compression plate a29 inside the occlusal plate 3. Two sets of springs d30 on one side of the compression plate a29 push the compression plate a29 and its rubber pad on one side to contact the cannula body 1, thus limiting the occlusal plate 3 to the outside of the cannula body 1. When the occlusal plate 3 needs to be moved, the push rod 26 is pushed so that the inclined surface at the top of the push rod 26 contacts the inclined groove 28 inside the connecting block 27, thereby pushing the connecting block 27 to move. This causes the rubber pad on one side of the connecting block 27 to disengage from the outside of the cannula body 1, and then the movable occlusal plate 3 can be inserted into the patient's oral cavity, so that the patient's teeth bite the occlusal plate 3, preventing the cannula body 1 from contacting and bending with the teeth, which would cause poor drug delivery.

[0028] Please see Figures 1-3 and Figures 7-8 A movable plate 31 is slidably connected to one side of the occlusal plate 3. A limiting rod 32 is fixedly connected to one side of the movable plate 31. The outer side of the limiting rod 32 is slidably connected to the occlusal plate 3. A compression plate b33 is fixedly connected to one end of the limiting rod 32. Rubber pads are fixedly connected to one side of both the compression plate b33 and the compression plate a29. A spring e34 is sleeved on the end of the limiting rod 32 away from the occlusal plate 3. One end of the spring e34 abuts against the inner side of the occlusal plate 3, and the other end of the spring e34 abuts against the movable plate 31. When the patient's teeth bite the occlusal plate 3, they can contact the protruding movable plate 31, thereby squeezing the movable plate 31 to move. The movable plate 31 will squeeze multiple sets of springs e34 and push the compression plate b33 to move through the limiting rod 32, so that the rubber pad on one side of the compression plate b33 contacts the outer side of the insertion tube body 1, thereby limiting the insertion tube body 1 and preventing the insertion tube body 1 from moving.

[0029] The contents not described in detail in this specification are existing technologies known to those skilled in the art.

[0030] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An adjustable anesthesia cannula for oral intubation, comprising a cannula body (1), wherein an air bag a (2) is fixedly connected to one end of the cannula body (1). Its features are: A biting plate (3) is slidably connected to the outside of the cannula body (1). A rigid plastic tube (4) is fixedly connected to one end of the cannula body (1) away from the airbag a (2). A sleeve (5) is sleeved to one end of the rigid plastic tube (4). A flexible tube (6) is fixedly connected to one end of the sleeve (5). A connector tube (7) is fixedly connected to one end of the flexible tube (6). An adjustment and fixing mechanism is provided inside the sleeve (5). The adjustment and fixing mechanism includes a locking rod (8) fixedly connected inside the sleeve (5). Multiple sets of fixing plates (9) are fixedly connected to the bottom of the rigid plastic tube (4). A sealing mechanism is provided at the bottom of the rigid plastic tube (4). The sealing mechanism includes a fixing sleeve (17) fixedly connected to the outside of the bottom of the rigid plastic tube (4). A sealing ring (14) abuts against the top of the fixing sleeve (17). An adjustment mechanism for adjusting the angle of the connector tube (7) is provided on one side. The bite plate (3) is provided with a limiting mechanism inside.

2. The adjustable anesthesia cannula for oral intubation according to claim 1, characterized in that: The top of the sleeve (5) is provided with a movable ring (10), the bottom of the movable ring (10) is connected to a ball, and the outer side of the ball is connected to the top of the sleeve (5). The top of the movable ring (10) is fixedly connected to a telescopic rod (11), the top of the telescopic rod (11) is fixedly connected to a fixed ring (13), the inner side of the fixed ring (13) is fixed to a rigid plastic tube (4), the outer side of the telescopic rod (11) is sleeved with a spring a (12), the top of the spring a (12) abuts against the fixed ring (13), the bottom of the spring a (12) abuts against the movable ring (10), the shape of the locking rod (8) is C-shaped, and the bottom of the movable ring (10) is provided with a locking mechanism.

3. An adjustable anesthesia cannula for oral intubation according to claim 2, characterized in that: The engaging mechanism includes a fixed block (23) fixedly connected to the top of the moving ring (10), a plug rod (22) is slidably connected inside the fixed block (23), a protrusion is fixedly connected to the top of the plug rod (22), and a spring c (24) is abutted on one side of the protrusion. One end of the spring c (24) abuts against the inner side of the fixed block (23), and one end of the plug rod (22) is engaged with a rigid plastic tube (4). A slot (25) matching the plug rod (22) is opened on one side of the rigid plastic tube (4).

4. An adjustable anesthesia cannula for oral intubation according to claim 1, characterized in that: The top of the fixed sleeve (17) and the bottom of the sealing ring (14) are both conical and they abut against each other. The top of the sealing ring (14) is fixedly connected to a slide rod (15). The outer side of the slide rod (15) is slidably connected to the sleeve (5). The top of the slide rod (15) is fixedly connected to a piston plate (18). The inside of the sleeve (5) is provided with a cavity for the piston plate (18) to slide.

5. An adjustable anesthesia cannula for oral intubation according to claim 4, characterized in that: The bottom of the slide bar (15) is fitted with a spring b (16), the bottom of the spring b (16) abuts against the sealing ring (14), the top of the spring b (16) abuts against the inner side of the sleeve (5), and one side of the cavity is connected to an air pipe (19).

6. An adjustable anesthesia cannula for oral intubation according to claim 5, characterized in that: The outer side of the trachea (19) is fixed to the sleeve (5). One end of the trachea (19) is connected to the airbag b (20). The outer side of the airbag b (20) is fixed to the sleeve (5). One side of the airbag b (20) abuts against the fixing sleeve (17). The outer side of the fixing sleeve (17) is provided with a groove (21), and the groove (21) is annular.

7. An adjustable anesthesia cannula for oral intubation according to claim 1, characterized in that: The adjustment mechanism includes a bracket (35) fixedly connected to both sides of the sleeve (5). One end of the bracket (35) is rotatably connected to the connector tube (7) via a rotating shaft. A worm gear (36) is fixedly connected to one side of the connector tube (7). A worm (37) is meshed with the outer side of the worm gear (36). The middle part of the worm (37) is rotatably connected to the bracket (35) via a bearing.

8. An adjustable anesthesia cannula for oral intubation according to claim 1, characterized in that: The limiting mechanism includes a push rod (26) that is slidably connected to the bottom of the biting plate (3). The top of the push rod (26) is wedge-shaped, and the top of the push rod (26) abuts against a connecting block (27). The connecting block (27) has an inclined groove (28) that matches the push rod (26) inside.

9. An adjustable anesthesia cannula for oral intubation according to claim 8, characterized in that: A pressing plate a (29) is fixedly connected to one side of the connecting block (27), and two sets of springs d (30) abut against one side of the pressing plate a (29). One end of the springs d (30) is fixed to the inner side of the biting plate (3).

10. An adjustable anesthesia cannula for oral intubation according to claim 1, characterized in that: A movable plate (31) is slidably connected to one side of the bite plate (3). A limiting rod (32) is fixedly connected to one side of the movable plate (31). The outer side of the limiting rod (32) is slidably connected to the bite plate (3). A pressing plate b (33) is fixedly connected to one end of the limiting rod (32). Rubber pads are fixedly connected to one side of both the pressing plate b (33) and the pressing plate a (29). A spring e (34) is sleeved on the end of the limiting rod (32) away from the bite plate (3). One end of the spring e (34) abuts against the inner side of the bite plate (3), and the other end of the spring e (34) abuts against the movable plate (31).

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