Severe patient trachea cannula fixing device convenient to adjust

Abstract

The invention discloses a critical patient trachea cannula fixing device convenient to adjust. The critical patient trachea cannula fixing device comprises a fixing shell, a sliding block and a tooth support. A chute is formed in the middle of the fixed shell and is in sliding connection with the sliding block; limiting teeth are arranged on the two sides of the sliding block respectively, a spherical groove is formed in the middle and rotationally connected with a universal ball, and rotating shafts are symmetrically arranged front and back and rotationally connected with an adjusting ring; the front end of the rotating shaft is slidably connected with a locking rod; the locking rod is sleeved with a locking spring, and the front end of the locking rod is provided with locking teeth movably connected with the adjusting ring. A pull buckle is arranged at the front end of the locking tooth; holes are symmetrically formed in the two sides of the adjusting ring to be rotationally connected with rotating shafts, a fixing barrel is arranged in the middle, and locking columns are arranged on one side to be movably connected with locking teeth; the position and the angle of the intubation can be flexibly adjusted according to specific conditions of a patient, and smooth operation of tracheal intubation is ensured.

Description

Technical Field

[0001] The present invention belongs to the technical field of medical devices, and particularly relates to a tracheal intubation fixation device for critically ill patients that is easy to adjust. Background Art

[0002] In the intensive care unit, tracheal intubation is an extremely common and important procedure. For patients with critical conditions, impaired respiratory function, or those unable to maintain airway patency independently, tracheal intubation can establish an effective artificial airway to ensure oxygen supply and carbon dioxide excretion, creating necessary conditions for subsequent respiratory support and treatment. In cases of severe pulmonary infection, acute respiratory distress syndrome, cardiopulmonary resuscitation, etc., tracheal intubation is often a crucial measure to save the patient's life;

[0003] In the prior art, when fixing the trachea, the traditional fixing method clamps and fixes through a single surface. However, since the trachea is a soft tube, it will exert uneven pressure on the tracheal intubation and the trachea, resulting in local flattening of the trachea; at the same time, the position and angle of the tracheal intubation need to be adjusted according to the specific situation of the patient. The traditional fixing method is difficult to achieve flexible adjustment, and it is easy to cause the intubation to shift or fall off during the adjustment process;

[0004] Therefore, in view of the above problems in the prior art, this solution proposes a tracheal intubation fixation device that is easy to adjust and has high stability. Summary of the Invention

[0005] In order to solve the above technical problems, the present invention designs a tracheal intubation fixation device for critically ill patients that is easy to adjust. By slidably connecting a sliding block to the fixed outer shell and rotatably connecting an adjusting ring to the sliding block, the position and angle of the intubation can be flexibly adjusted according to the patient's condition, thus ensuring the success of the intubation; at the same time, a fixed cylinder is arranged above the adjusting ring. By circumferentially arranging pressing plates above the fixed cylinder and providing internal pressing threads on the outside, when fixing, through the engagement of the internal pressing threads and the external pressing threads, the pressing plates are close to the surface of the intubation, so as to apply uniform pressure to the intubation on the premise of ensuring fixing stability and prevent local flattening;

[0006] To achieve the above technical effects, the present invention is realized through the following technical solutions: A tracheal intubation fixation device for critically ill patients that is easy to adjust, comprising: a fixed outer shell, a sliding block, and a dental support;

[0007] A chute is opened in the middle of the fixed outer shell to slidably connect the sliding block, and the lower end is movably connected to the dental support;

[0008] Limit teeth are respectively arranged on both sides of the sliding block, a spherical groove is opened in the middle to rotatably connect a universal ball, and rotating shafts are symmetrically arranged at the front and back to rotatably connect an adjusting ring; the front end of the rotating shaft is slidably connected to a locking rod; a locking spring is sleeved outside the locking rod, and a locking tooth is arranged at the front end to movably connect the adjusting ring; a pull buckle is arranged at the front end of the locking tooth; holes are symmetrically opened on both sides of the adjusting ring to rotatably connect the rotating shaft, a fixed cylinder is arranged in the middle, and a locking column is arranged on one side to movably connect the locking tooth;

[0009] Further, the opening directions of the limit teeth on both sides are opposite;

[0010] Further, pressing plates are arranged in a circumferential array at the upper end of the fixed cylinder, and a pressing screw is sleeved outside; an internal pressing thread is arranged at the upper end of the pressing screw to be threadedly connected to the internal pressing thread; a fixing knob is arranged at the upper end of the internal pressing thread;

[0011] Further, the cross-section of the upper end of the pressing plate is set as a right triangle, and the hypotenuse faces outward;

[0012] Further, the lower end of the external pressing thread is provided with the same inclined surface to be slidably connected to the upper end of the pressing plate;

[0013] Further, slots are symmetrically opened at the centers of both sides in the middle of the fixed housing to slidably connect limit racks; a limit spring is arranged at the rear end of the limit rack to be fixedly connected to the fixed housing, and an L-shaped rod is vertically connected to the front end; a limit button is arranged at the rear end of the L-shaped rod;

[0014] Further, fixing buckles are symmetrically arranged at the lower ends of both sides of the fixed housing to movably connect a fixed belt; an air bag is arranged on the inner surface of the fixed belt;

[0015] Further, a spreading seat is arranged at the lower part of one end of the fixed housing to rotatably connect a spreading rod; a worm gear is arranged in the middle of the spreading rod, and screw rods are symmetrically arranged on both sides to be threadedly connected to a tooth brace; a regulating worm is meshed with one side of the worm gear; a regulating rod is arranged at the upper end of the regulating worm; the regulating rod is rotatably connected to the fixed housing, and the upper end penetrates through the fixed housing to be provided with a regulating knob;

[0016] Further, the thread pitches of the screw rods on both sides of the spreading rod are the same, and the thread helix directions are opposite.

[0017] The beneficial effects of the present invention are as follows:

[0018] By arranging a slidable sliding block on the fixed housing and rotatably connecting an adjusting ring on the sliding block, the present invention can flexibly adjust the position and angle of the intubation according to the specific conditions of the patient, ensure the smooth progress of tracheal intubation, improve the success rate and adaptability of the intubation operation, and meet the personalized needs of different patients;

[0019] At the same time, by arranging the extrusion plates in a circumferential array above the fixing tube and cooperating with the meshing structure of the external extrusion internal thread and the extrusion external thread, the extrusion plates can be closely attached to the surface of the cannula during fixing, and uniform pressure is applied to the cannula. Under the premise of ensuring the fixing stability, the problem of local compression of the trachea caused by uneven pressure on the trachea and the trachea is effectively avoided, thereby protecting the normal shape and function of the trachea.

[0020] Finally, by fixing the fixing buckles at the lower ends of both sides of the outer shell in combination with the fixing belt, and arranging airbags on the inner surface of the fixing belts, not only can the device be firmly fixed, but the cushioning effect of the airbags can also improve the wearing comfort of the patient and reduce pressure and damage to the patient's skin. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for describing the embodiments are briefly introduced below.

[0022] Figure 1 The diagram is a schematic diagram of the overall structure of a tracheal intubation fixing device for critically ill patients that is easy to adjust;

[0023] Figure 2 It is a top view of a cross-sectional view of a device for fixing an endotracheal tube for a critically ill patient that is easy to adjust;

[0024] Figure 3 It is a schematic diagram of the structure of a sliding block of a tracheal intubation fixing device for critically ill patients that is easy to adjust;

[0025] Figure 4 It is a side cross-sectional view of an easily adjustable endotracheal tube fixation device for critically ill patients;

[0026] Figure 5 A is a partial structural schematic diagram of a tracheal intubation fixing device for critically ill patients that is easy to adjust;

[0027] Figure 6 The present invention is a schematic diagram of the structure of an adjustment ring of a tracheal intubation fixing device for critically ill patients that is easy to adjust;

[0028] Figure 7 It is a schematic diagram of the connection structure of an extrusion plate of a tracheal intubation fixing device for critically ill patients that is easy to adjust;

[0029] Figure 8 The invention is a schematic diagram of the structure of a spreader rod of a tracheal intubation fixing device for critically ill patients that is easy to adjust;

[0030] Figure 9 It is a schematic diagram of the tooth support connection structure of a tracheal intubation fixing device for critically ill patients that is easy to adjust;

[0031] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0032] 1-fixed shell, 2-fixed buckle, 3-fixed belt, 4-airbag, 5-limit button, 6-L-shaped rod, 7-limit rack, 8-limit spring, 9-sliding block, 10-limit tooth, 11-spherical groove, 12-rotating shaft, 13-locking tooth, 14-pull buckle, 15-locking spring, 16-locking column, 17-adjusting ring, 18-fixed cylinder, 19-fixed knob, 20-extrusion plate, 21-extruded external thread, 22-extruded internal thread, 23-tooth support, 24-screw, 25-spreading seat, 26-worm gear, 27-spreading rod, 28-adjusting worm, 29-adjusting rod, 30-adjusting knob, 31-universal ball, 32-locking rod, 33-extrusion screw. DETAILED DESCRIPTION

[0033] The present invention discloses an easily adjustable endotracheal intubation fixing device for critically ill patients, comprising: a fixed shell 1, a sliding block 9, and a tooth support 23; a sliding groove is provided in the middle of the fixed shell 1 for sliding connection with the sliding block 9, and a lower end is movably connected with the tooth support 23; limiting teeth 10 are respectively arranged on both sides of the sliding block 9, a spherical groove 11 is provided in the middle for rotationally connecting with a universal ball 31, and a rotating shaft 12 is symmetrically arranged front and back for rotationally connecting with an adjusting ring 17; the front end of the rotating shaft 12 is slidably connected with a locking rod 32; a locking spring 15 is sleeved on the outside of the locking rod 32, and a locking tooth 13 is provided at the front end for movably connecting with the adjusting ring 17; a draw buckle 14 is provided at the front end of the locking tooth 13; holes are symmetrically provided on both sides of the adjusting ring 17 for rotationally connecting with the rotating shaft 12, a fixing cylinder 18 is provided in the middle, and a locking column 16 is provided on one side for movably connecting with the locking tooth 13; the position and angle of the intubation can be flexibly adjusted according to the specific situation of the patient to ensure the smooth progress of the endotracheal intubation.

[0034] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention; it is obvious that the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0035] Example 1

[0036] like Figures 1-6 As shown, the middle of the fixed housing 1 is provided with a sliding groove to slidably connect the sliding block 9, and the lower end is movably connected to the tooth support 23;

[0037] The sliding block 9 is provided with limit teeth 10 on both sides, a spherical groove 11 is provided in the middle to be rotatably connected to the universal ball 31, and a rotating shaft 12 is symmetrically provided at the front and rear to be rotatably connected to the adjusting ring 17; the front end of the rotating shaft 12 is slidably connected to the locking rod 32; a locking spring 15 is sleeved on the outside of the locking rod 32, and a locking tooth 13 is provided at the front end to be movably connected to the adjusting ring 17; a buckle 14 is provided at the front end of the locking tooth 13; holes are symmetrically provided on both sides of the adjusting ring 17 to be rotatably connected to the rotating shaft 12, a fixing cylinder 18 is provided in the middle, and a locking column 16 is provided on one side to be movably connected to the locking tooth 13;

[0038] The opening directions of the limiting teeth 10 on both sides are opposite;

[0039] At the upper end of the fixed cylinder 18, extrusion plates 20 are arranged in a circumferential array, and an extrusion screw 33 is sleeved outside; an extrusion internal thread 22 is arranged at the upper end of the extrusion screw 33 and is threadedly connected to the extrusion internal thread 22; a fixing knob 19 is arranged at the upper end of the extrusion internal thread 22;

[0040] The cross-section of the upper end of the extrusion plate 20 is set as a right triangle, and the hypotenuse faces outward;

[0041] At the lower end of the extrusion external thread 21, a same inclined surface is provided and is slidably connected to the upper end of the extrusion plate 20;

[0042] On both sides of the middle of the fixed housing 1, slots are symmetrically opened at the centers and are slidably connected to the limiting rack 7; a limiting spring 8 is arranged at the rear end of the limiting rack 7 and is fixedly connected to the fixed housing 1, and an L-shaped rod 6 is vertically connected to the front end; a limiting button 5 is arranged at the rear end of the L-shaped rod 6;

[0043] On both sides of the lower end of the fixed housing 1, fixing buckles 2 are symmetrically arranged and are movably connected to a fixing belt 3; an air bag 4 is arranged on the inner surface of the fixing belt 3;

[0044] At the lower part of one end of the fixed housing 1, a spreading seat 25 is arranged and is rotatably connected to a spreading rod 27; a worm gear 26 is arranged in the middle of the spreading rod 27, and screw rods 24 are symmetrically arranged on both sides and are threadedly connected to a tooth brace 23; a regulating worm 28 is meshed with one side of the worm gear 26; a regulating rod 29 is arranged at the upper end of the regulating worm 28; the regulating rod 29 is rotatably connected to the fixed housing 1, and the upper end penetrates through the fixed housing 1 and is provided with a regulating knob 30;

[0045] The thread pitches of the screw rods 24 on both sides of the spreading rod 27 are the same, and the thread helix directions are opposite;

[0046] In this embodiment, when it is necessary to adjust the position of the endotracheal tube, press the limiting buttons 5 on both sides of the middle of the fixed housing 1. The limiting buttons 5 drive the L-shaped rod to move. The L-shaped rod makes the limiting rack 7 move backward against the elastic force of the limiting spring 8, releasing the limit on the sliding block 9. At this time, according to the position of the endotracheal tube that the patient needs to adjust, slide the sliding block 9 along the chute on the fixed housing 1. When the sliding block 9 slides to a suitable position, release the limiting button 5. The limiting spring 8 pushes the limiting rack 7 forward to make the limiting rack 7 re-engage with the limiting teeth 10 on the sliding block 9, limiting the sliding block 9 to prevent it from sliding randomly, thereby fixing the position of the sliding block 9 and preliminarily determining the position of the endotracheal tube;

[0047] When it is necessary to adjust the angle of the intubation tube, pull the buckle 14 at the front end of the locking lever 32, so that the locking tooth 13 moves backward against the elastic force of the locking spring 15, releasing the connection between the locking tooth 13 and the locking post 16 on the adjusting ring 17. At this time, the adjusting ring 17 can rotate around the rotating shaft 12. According to the actual situation of the patient's trachea, rotate the adjusting ring 17. The adjusting ring 17 rotates around the rotating shaft 12, thereby changing the angle of the fixed cylinder 18 and the internal tracheal intubation tube. Since the universal ball 31 is arranged in the middle of the adjusting ring 17 and is rotationally connected with the spherical groove 11 on the sliding block 9, the angle can be flexibly adjusted in multiple directions. When the adjusting ring 17 rotates to an appropriate angle, release the buckle 14, and the locking spring 15 pushes the locking tooth 13 forward to make the locking tooth 13 engage with the locking post 16 on the adjusting ring 17 again, locking the angle of the adjusting ring 17 to ensure that the angle of the tracheal intubation tube does not change during use;

[0048] In this embodiment, by sliding the sliding block 9 on the chute of the fixed housing 1 to adjust the position of the intubation tube, the device can better adapt to the differences in the body structures of different patients. For patients with different tracheal positions due to factors such as individual body fatness, chest shape, etc., the sliding block 9 can be adjusted to an appropriate position so that the tracheal intubation tube can accurately align with the tracheal inlet of the patient, ensuring the smooth progress of intubation, improving the versatility of the device for various patients. The adjustable intubation position can provide a more suitable operating space for medical staff during intubation operations and subsequent nursing. When other relevant examinations or treatment operations need to be performed on the patient, the intubation position can be appropriately adjusted to avoid interference with other medical devices or operating areas, facilitating various operations of medical staff and improving the efficiency and convenience of medical work;

[0049] By using the adjusting ring 17 to rotate around the rotating shaft 12 and combining with the universal ball 31 to adjust the angle of the intubation tube, the physiological trend of the patient's trachea can be accurately matched. In some patients, the trachea may have a certain curvature or inclination angle. By flexibly adjusting the angle of the intubation tube, the intubation tube can better fit the trachea, reducing the friction and irritation of the intubation tube on the tracheal wall, reducing the risk of tracheal mucosal injury, and at the same time ensuring the patency of the airway and improving the gas exchange efficiency; moreover, in some patients, the trachea may have a certain curvature or inclination angle. By flexibly adjusting the angle of the intubation tube, the intubation tube can better fit the trachea, reducing the friction and irritation of the intubation tube on the tracheal wall, reducing the risk of tracheal mucosal injury, and at the same time ensuring the patency of the airway and improving the gas exchange efficiency.

[0050] Embodiment 2

[0051] As Figure 1 、 6 shown in FIGS. 7, a chute is provided in the middle of the fixed housing 1 for sliding connection with the sliding block 9, and the lower end is movably connected to the dental brace 23;

[0052] On both sides of the sliding block 9, limit teeth 10 are respectively arranged, a spherical groove 11 is opened in the middle and is rotatably connected to a universal ball 31, and rotating shafts 12 are symmetrically arranged front and back and are rotatably connected to an adjusting ring 17; the front end of the rotating shaft 12 is slidably connected to a locking rod 32; a locking spring 15 is sleeved outside the locking rod 32, and a locking tooth 13 is arranged at the front end and is movably connected to the adjusting ring 17; a pull buckle 14 is arranged at the front end of the locking tooth 13; on both sides of the adjusting ring 17, holes are symmetrically opened and are rotatably connected to the rotating shaft 12, a fixed cylinder 18 is arranged in the middle, and a locking column 16 is arranged on one side and is movably connected to the locking tooth 13;

[0053] The opening directions of the limit teeth 10 on both sides are opposite;

[0054] On the upper end of the fixed cylinder 18, extrusion plates 20 are arranged in a circumferential array, and an extrusion screw 33 is sleeved outside; an extrusion internal thread 22 is arranged at the upper end of the extrusion screw 33 and is threadedly connected to the extrusion internal thread 22; a fixing knob 19 is arranged at the upper end of the extrusion internal thread 22;

[0055] The cross-section of the upper end of the extrusion plate 20 is set as a right triangle, and the hypotenuse faces outwards;

[0056] The lower end of the extrusion external thread 21 is provided with the same inclined surface and is slidably connected to the upper end of the extrusion plate 20;

[0057] On both sides of the middle of the fixed housing 1, grooves are symmetrically opened at the centers and are slidably connected to limit rack bars 7; a limit spring 8 is arranged at the rear end of the limit rack bar 7 and is fixedly connected to the fixed housing 1, and an L-shaped rod 6 is vertically connected to the front end; a limit button 5 is arranged at the rear end of the L-shaped rod 6;

[0058] On both sides of the lower end of the fixed housing 1, fixing buckles 2 are symmetrically arranged and are movably connected to a fixing belt 3; an airbag 4 is arranged on the inner surface of the fixing belt 3;

[0059] At the lower part of one end of the fixed housing 1, a spreading seat 25 is arranged and is rotatably connected to a spreading rod 27; a worm gear 26 is arranged in the middle of the spreading rod 27, and screw rods 24 are symmetrically arranged on both sides and are threadedly connected to a tooth brace 23; a regulating worm 28 is meshed with one side of the worm gear 26; a regulating rod 29 is arranged at the upper end of the regulating worm 28; the regulating rod 29 is rotatably connected to the fixed housing 1, and the upper end penetrates through the fixed housing 1 and is provided with a regulating knob 30;

[0060] The thread pitches of the screw rods 24 on both sides of the spreading rod 27 are the same, and the thread helix directions are opposite;

[0061] In this embodiment, when the device is in use, the fixed shell 1 is connected to the fixing belt 3 through the fixing buckles 2 at the lower ends of both sides, and is worn around the patient's head at a suitable position. The airbag 4 on the inner surface of the fixing belt 3 fits the skin, which can not only ensure firm fixation, but also improve the patient's comfort. When the tooth support 23 is used as an aid, the adjustment knob 30 is turned, and the adjustment knob 30 drives the adjustment rod 29, thereby rotating the adjustment worm 28, meshing with the worm wheel 26, and pushing the opening rod 27 to move. The screws 24 on both sides of the opening rod 27 have the same thread pitch and opposite rotation direction, and synchronously drive the tooth support 23 to open to a suitable distance and put it into the patient's mouth;

[0062] Put the tracheal tube into the fixing cylinder 18, rotate the fixing knob 19, the fixing knob 19 drives the extrusion screw 33 to rotate, the extrusion internal thread 22 on the extrusion screw 33 is meshed with the extrusion external thread 21 outside the extrusion plate 20, so that the extrusion plate 20 gradually moves downward. Since the cross-section of the upper end of the extrusion plate 20 is a right triangle with the hypotenuse facing outward, and the lower end of the extrusion external thread 21 has the same inclined surface and is slidably connected with it, during the downward movement, the extrusion plate 20 will evenly adhere to the surface of the tube, apply uniform pressure to the tube, achieve stable fixation, and prevent local collapse;

[0063] In this embodiment, by providing anti-slip materials such as silicone and rubber on the inner surface of the squeezing plate 20, the outer surface of the tracheal tube can be closely fitted, and even if the tube surface has a certain curvature, it can be fully adapted, and the squeezing plate 20 will not be unstable due to insufficient contact with the tube.

[0064] In summary, the present invention provides a slidable sliding block 9 on the fixed housing 1, and the sliding block 9 is rotatably connected to the adjusting ring 17, so that the position and angle of the intubation tube can be flexibly adjusted according to the specific conditions of the patient, thereby ensuring the smooth progress of the tracheal intubation, improving the success rate and adaptability of the intubation operation, and meeting the personalized needs of different patients.

[0065] At the same time, by arranging the extrusion plates 20 in a circumferential array above the fixing tube 18 and cooperating with the meshing structure of the external extrusion internal threads 22 and the extrusion external threads 21, the extrusion plates 20 can be closely attached to the surface of the cannula during fixing, and uniform pressure is applied to the cannula. Under the premise of ensuring the fixing stability, the problem of local compression of the trachea caused by uneven pressure on the trachea cannula and the trachea is effectively avoided, thereby protecting the normal shape and function of the trachea.

[0066] Finally, by fixing the fixing buckles 2 at the lower ends of both sides of the outer shell 1 in combination with the fixing belt 3, and arranging the airbag 4 on the inner surface of the fixing belt 3, not only can the device be firmly fixed, but also the cushioning effect of the airbag 4 can improve the wearing comfort of the patient and reduce the pressure and damage to the patient's skin.

[0067] The preferred embodiments of the present invention disclosed above are only used to help illustrate the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to the specific embodiments described above.

Claims

1. An easily adjustable endotracheal tube fixing device for critically ill patients, characterized in that: Including: fixed shell, sliding block, tooth support; The middle of the fixed shell is provided with a sliding groove for sliding connection with the sliding block, and the lower end is movably connected with the tooth support; Limit teeth are respectively arranged on both sides of the sliding block, a spherical groove is provided in the middle for rotatably connecting to the universal ball, and a rotating shaft is symmetrically provided front and back to rotatably connect to the adjusting ring; the front end of the rotating shaft is slidably connected to the locking rod; a locking spring is sleeved on the outside of the locking rod, and a locking tooth is provided at the front end to movably connect to the adjusting ring; a pull buckle is provided at the front end of the locking tooth; holes are symmetrically provided on both sides of the adjusting ring for rotatably connecting to the rotating shaft, a fixing cylinder is provided in the middle, and a locking column is provided on one side to movably connect to the locking tooth.

2. The easily adjustable endotracheal tube fixing device for critically ill patients according to claim 1, characterized in that: The opening directions of the limiting teeth on both sides are opposite.

3. The easily adjustable tracheal intubation fixing device for critically ill patients according to claim 1, characterized in that: An extrusion plate is arranged in a circumferential array on the upper end of the fixed cylinder, and an extrusion screw is sleeved on the outside; an extrusion internal thread is arranged on the upper end of the extrusion screw to be threadedly connected with the extrusion internal thread; a fixing knob is arranged on the upper end of the extrusion internal thread.

4. The easily adjustable endotracheal tube fixing device for critically ill patients according to claim 3, characterized in that: The cross section of the upper end of the extruded plate is arranged to be a right triangle with the hypotenuse facing outwards.

5. The easily adjustable tracheal intubation fixing device for critically ill patients according to claim 3, characterized in that: The lower end of the extruded external thread is provided with the same inclined surface and is slidably connected with the upper end of the extruded plate.

6. The easily adjustable endotracheal tube fixing device for critically ill patients according to claim 1, characterized in that: The central part of the fixed shell has grooves symmetrically arranged on both sides thereof for sliding connection with a limit rack; a limit spring is arranged at the rear end of the limit rack for fixing the fixed shell, and the front end is vertically connected to an L-shaped rod; a limit button is arranged at the rear end of the L-shaped rod.

7. The easily adjustable endotracheal tube fixing device for critically ill patients according to claim 1, characterized in that: The lower ends of both sides of the fixed shell are symmetrically provided with fixing buckles that are movably connected to the fixing belts; and the inner surface of the fixing belts is provided with air bags.

8. The easily adjustable endotracheal tube fixing device for critically ill patients according to claim 1, characterized in that: A spreading seat is arranged at the lower part of one end of the fixed shell and is rotatably connected to the spreading rod; a worm gear is arranged in the middle of the spreading rod, and screws are symmetrically arranged on both sides to be threadedly connected to the tooth supports; an adjusting worm is arranged on one side of the worm gear for meshing; an adjusting rod is arranged at the upper end of the adjusting worm; the adjusting rod is rotatably connected to the fixed shell, and an adjusting knob is arranged on the upper end that penetrates the fixed shell.

9. The easily adjustable tracheal intubation fixing device for critically ill patients according to claim 8, characterized in that: The thread pitches of the screws on both sides of the expansion rod are the same, and the thread rotation directions are opposite.

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