Tracheal catheter capable of moving back and forth

Abstract

The utility model belongs to the technical field of medical instruments, and particularly relates to a tracheal catheter capable of moving back and forth, which comprises a catheter body, three side holes are formed in the periphery of the bottom end of the catheter body, three blocking pieces are arranged on the periphery of the interior of the bottom end of the catheter body, and limiting strips are arranged on the two sides of each blocking piece. The middle position of the upper end of the blocking piece is fixedly connected with a lifting line. An inner air bag is fixedly connected to the periphery of the outer wall of the bottom end of the tube body, a plurality of upper connecting strips are fixedly connected to the periphery of the outer wall of the upper end of the inner air bag, a plurality of lower connecting strips are fixedly connected to the periphery of the outer wall of the bottom end of the inner air bag, and an outer air bag is arranged on the periphery of the outer portion of the inner air bag. According to the utility model, the front end of the tube body is provided with the three side holes which can be lifted to control opening and closing, the inner air bag and the outer air bag are arranged outside the tube body, and the tube body and the inner air bag can move back and forth relative to the outer air bag, so that the side holes at the front end of the tube body can be better aligned to the upper lung lobe breathing opening, and oxygen supply of the lung lobe is facilitated.

Description

Technical Field

[0001] The utility model belongs to the technical field of medical appliances, and in particular relates to a tracheal tube which can move forwards and backwards. Background Art

[0002] The endotracheal tube currently used in clinical practice is mainly composed of the following parts: a tube body (made of transparent PVC, flexible, and with a side opening on one side of the front end of the tube body), a connector (located at the upper end of the tube body for connecting to an oxygen machine), an air bag (located at the front end of the tube body, not inflated during intubation, and after intubation is in place, when the air bag is located at the right upper lung opening, inflation is limited to prevent the tube body from moving forward and backward), an inflation tube and an inflation valve (used for inflating the air bag). Among them, in addition to the front end tube mouth of the tube body, the front end of the tube body is also provided with a side opening on one side. The front end tube mouth is used to supply oxygen to the lower lung lobe, and the side opening is used to supply oxygen to the upper lung lobe. Because the human body has a total of three lung lobes for ventilation, namely the upper, middle and lower lung lobes, when a person is not breathing, oxygen needs to be delivered to their lung lobes.

[0003] The existing endotracheal tubes used in clinical practice have the following defects when in use:

[0004] 1. Existing endotracheal tubes generally have only one side opening at the front end. However, due to the different internal structures of each person, when inserting the endotracheal tube, this side opening at the front end may not be aligned with the respiratory opening of the upper lung lobe. Currently, to solve this problem, either oxygen is supplied to the lower lung lobe only through the tube opening at the front end of the tube body, and the patient is only oxygenated through the lower lung lobe. Although this can basically maintain vital signs, the oxygen intake is relatively small and the oxygen supply effect is poor. Another method is to rotate the tube body to align the side opening at the front end of the tube body with the respiratory opening of the upper lung lobe. However, existing tubes are relatively soft and difficult to rotate in the human body, making adjustment more difficult.

[0005] 2. During clinical use, after the airbag is fixed to the opening of the right upper lung, it is found that the side opening at the front end of the tube body cannot be aligned with the respiratory opening of the upper lobe. The reason is that the airbag is directly fixed on the tube body, and the length from the airbag to the front end of the tube body is fixed. However, each person's internal structure is different. After the airbag is fixed to the opening of the right upper lung, the side opening at the front end of the tube body may still be too far away from the respiratory opening of the upper lobe. Regardless of whether the distance is too long or too short, it is difficult to align the side opening at the front end of the tube body with the respiratory opening of the upper lobe.

[0006] Therefore, the present invention makes a further innovative design based on the existing tracheal tube. Utility Model Content

[0007] The invention provides an endotracheal tube that can be moved forward and backward, and has three side openings around the front end of the tube body, and a baffle is further movably provided on the inner side of the side opening. At the same time, through the arrangement and coordination of the limit strips and the pulling line, the baffle can be lifted up to open the side opening so as to align with the respiratory opening of the upper lobe for oxygen supply, so as to ensure the oxygen flow rate and improve the oxygen supply effect of the lung lobe, which is labor-saving and convenient. In addition, an inner air bag is fixedly provided on the outside of the front end of the tube body, and an outer air bag is movably connected to the outside of the inner air bag by a plurality of upper and lower connecting strips. The inner air bag and the tube body can further move forward and backward relative to the outer air bag to adjust the position of the front end of the tube body so that the side opening at the front end of the tube body can be better aligned with the respiratory opening of the upper lobe. After alignment, air is inflated in the inner air bag. The inflation of the inner air bag can fit tightly with the outer air bag to complete the limitation of the inner air bag and the tube body relative to the outer air bag to prevent the tube body from moving forward and backward, which is convenient to use.

[0008] To achieve the above-mentioned object, the present invention provides the following technical solution: a tracheal tube that can be moved forward and backward, comprising a tube body, three side openings being opened around the bottom end of the tube body, three baffles being provided around the inside of the bottom end of the tube body, and the baffles being located at the rear ends of the side openings, limit bars being provided on both sides of the baffles, the baffles being fixedly connected to the inner wall of the tube body, and the baffles being slidably connected to the limit bars, and a lifting wire being fixedly connected to the middle position of the upper end of the baffle;

[0009] Three guide grooves are provided around the upper end of the tube body, three pull sleeves are fixedly connected to the outer wall of the upper end of the tube body and the pull sleeves are communicated with the guide grooves, a pull block is movably connected inside the front end of the pull sleeve, and the upper end of the pulling line passes through the guide groove and is fixedly connected to the front end of the pull block, a slot is provided at the rear end of the pull sleeve, a pull rod is movably connected inside the slot, and the front end of the pull rod is fixedly connected to the rear end of the pull block, and the rear end of the pull rod is fixedly connected to a pull button;

[0010] The inner air bag is fixedly connected to the outer wall of the bottom end of the tube body, the upper right end of the inner air bag is fixedly connected to inflation tube 1, and inflation tube 1 is fixedly connected to the outer wall of the tube body, a plurality of upper connecting strips are fixedly connected to the outer wall of the upper end of the inner air bag, a plurality of lower connecting strips are fixedly connected to the outer wall of the bottom end of the inner air bag, an outer air bag is arranged around the outside of the inner air bag, and the ends of the upper connecting strips and the lower connecting strips that are different from the inner air bag are fixedly connected to the inner wall of the outer air bag, and the upper left end of the outer air bag is fixedly connected to inflation tube 2, and inflation tube 2 is fixedly connected to the outer wall of the tube body.

[0011] As a preferred technical solution of the tracheal tube that can move forward and backward in the present invention, the blocking piece is an arc-shaped structure, and the limiting strip is an "L"-shaped structure.

[0012] As a preferred technical solution of the tracheal tube that can move forward and backward according to the present invention, a plurality of limiting sleeves are fixedly connected to the inner wall of the tube body, and the pulling wire passes through the limiting sleeves.

[0013] As an optimal technical solution for a tracheal tube that can move forward and backward according to the present invention, axial holes are provided on the inner walls on both sides of the guide groove, and a support wheel is provided inside the guide groove. The support wheel is an "H" structure, and the pulling line is in contact with the upper end of the support wheel. Both ends of the support wheel are fixedly connected with a wheel axle, and the wheel axle is rotatably connected to the axial hole.

[0014] As a preferred technical solution of the tracheal tube that can move forward and backward according to the present invention, the inner airbag is a cylindrical structure, and the outer airbag is an elliptical structure.

[0015] As a preferred technical solution of the endotracheal tube that can move forward and backward according to the present invention, the upper connecting bar is a "V"-shaped structure, and the lower connecting bar is an inverted "V"-shaped structure.

[0016] As a preferred technical solution of the tracheal tube that can move forward and backward in the present invention, the upper end of the inflation tube 1 is fixedly connected to the inflation valve 1, and the upper end of the inflation tube 2 is fixedly connected to the inflation valve 2.

[0017] As a preferred technical solution of the tracheal tube that can move forward and backward according to the present invention, the upper end of the tube body is snap-connected with a joint.

[0018] Compared with the prior art, the beneficial effects of the present invention are:

[0019] 1. The utility model is provided with three side openings around the front end of the tube body, and a blocking piece is further movably provided on the inner side of the side opening. At the same time, the blocking piece can be lifted up to open the side opening through the arrangement and coordination of the limit strip and the pulling line. When in use, when the side opening at the front end of the tube body is in place, the side opening can be opened for use according to which side opening is closest to the respiratory port of the lower lobe, while the other two side openings remain closed so as to align with the respiratory port of the upper lobe for oxygen supply, thereby ensuring the oxygen flow and improving the oxygen supply effect of the lung lobe. Compared with the method of rotating and adjusting the tube body in the prior art to align a single side opening at the front end with the respiratory port of the upper lobe, the utility model is more labor-saving and convenient.

[0020] At the same time, through the three pull sleeves around the upper end of the tube body and the arrangement and coordination of the inner pull block, pull rod and pull button, the pulling control of the pulling wire and baffle inside the tube body can be achieved from the outside of the tube body, which is labor-saving and convenient.

[0021] 2. The utility model has an inner airbag fixedly provided outside the front end of the tube body, and an outer airbag is movably connected to the outside of the inner airbag by a plurality of upper connecting bars and a lower connecting bar. Before intubation, neither the inner airbag nor the outer airbag is inflated. After the intubation is in place, when the outer airbag is located at the opening of the upper lobe, the outer airbag is inflated to fix it. Since the inner airbag is not inflated at this time, and the outer airbag is movably connected to the inner airbag by a plurality of upper connecting bars and a lower connecting bar, the inner airbag and the tube body can further move forward and backward relative to the outer airbag to adjust the position of the front end of the tube body so that the side opening at the front end of the tube body can be better aligned with the respiratory opening of the upper lobe. After alignment, the inner airbag is inflated again. The inner airbag is inflated and can fit tightly with the outer airbag to complete the limitation of the inner airbag and the tube body relative to the outer airbag to prevent the tube body from moving forward and backward, which is convenient to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0023] Figure 1 It is a structural diagram of the utility model;

[0024] Figure 2 This is a schematic diagram of the connection structure of the tube body, inner airbag and outer airbag of the utility model;

[0025] Figure 3 This is a schematic diagram of the cross-sectional structure of the side opening and the baffle connection of the present invention;

[0026] Figure 4 This is a schematic diagram of the cross-sectional structure of the connection between the limit strip and the baffle of the present invention;

[0027] Figure 5 This is a schematic diagram of the connection structure of the inner airbag and the outer airbag of the utility model;

[0028] Figure 6 This is a schematic diagram of the partial cross-sectional structure of the connection between the inner airbag and the outer airbag of the present invention;

[0029] Figure 7 This is a schematic diagram of the upper connecting bar and lower connecting bar structure of the utility model;

[0030] Figure 8 This is a schematic diagram of the pipe body and pull sleeve connection structure of the utility model;

[0031] Figure 9 This is a schematic diagram of the cross-sectional structure of the pipe body and the pull sleeve connection of the utility model;

[0032] Figure 10 for Figure 9 A schematic diagram of the enlarged structure at point A;

[0033] Figure 11 It is a schematic side cross-sectional structure diagram of the connection between the pipe body and the pull sleeve of the present invention.

[0034] In the figure: 1. Tube body; 2. Side opening; 3. Limiting strip; 4. Baffle; 5. Pulling line; 6. Limiting sleeve; 7. Inner airbag; 8. Inflating tube 1; 9. Inflating valve 1; 10. Upper connecting strip; 11. Lower connecting strip; 12. Outer airbag; 13. Inflating tube 2; 14. Inflating valve 2; 15. Guide groove; 16. Axis hole; 17. Support wheel; 18. Axle; 19. Pull sleeve; 20. Pull block; 21. Slot; 22. Pull rod; 23. Pull button; 24. Connector. DETAILED DESCRIPTION

[0035] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0036] Example

[0037] See also Figure 1-11 The utility model provides the following technical solutions: a tracheal tube that can be moved forward and backward, comprising a tube body 1, the upper end of the tube body 1 is snap-connected with a joint 24, three side openings 2 are opened around the bottom end of the tube body 1, three baffles 4 are arranged around the inside of the bottom end of the tube body 1, and the baffles 4 are located at the rear end of the side openings 2, the baffles 4 are arc-shaped, and both sides of the baffles 4 are provided with limit strips 3, the limit strips 3 are "L"-shaped, the baffles 4 are fixedly connected to the inner wall of the tube body 1, and the baffles 4 are slidably connected to the limit strips 3, the middle position of the upper end of the baffle 4 is fixedly connected to the pulling line 5, and the inner wall of the tube body 1 is fixedly connected to Several limiting sleeves 6, and the pulling wire 5 passes through the limiting sleeve 6, wherein the joint 24 is the original structure of the existing tracheal tube, and the design is retained for connecting the tube body 1 with the external oxygen machine. The side openings 2 are provided at three places, and are opened at different positions. When not in use, they are blocked and closed by the baffle 4. When in use, the lifting wire 5 is lifted, the baffle 4 moves upward relative to the limiting strip 3, and the side opening 2 is opened. The side opening 2 is used for oxygen supply to the upper lobe, while the oxygen supply to the lower lobe is realized by the front end nozzle of the tube body 1. The limiting sleeve 6 is used to limit the long section of the pulling wire 5 in the tube body 1 to prevent the three pulling wires 5 from being entangled together;

[0038] Reference Figure 1 、 Figure 8 、 Figure 9 、 Figure 10 and Figure 11As shown, further, three guide grooves 15 are provided around the upper end of the tube body 1, and shaft holes 16 are provided on the inner walls on both sides of the guide groove 15. A support wheel 17 is provided inside the guide groove 15, and the support wheel 17 is an "H" structure, and the pulling line 5 is in contact with the upper end of the support wheel 17. Both ends of the support wheel 17 are fixedly connected with a wheel axle 18, and the wheel axle 18 is rotatably connected to the shaft hole 16. Three pull sleeves 19 are fixedly connected to the outer wall of the upper end of the tube body 1, and the pull sleeve 19 is communicated with the guide groove 15. A pull block 20 is movably connected to the front end of the pull sleeve 19, and the upper end of the pulling line 5 passes through the guide groove 15 and is fixedly connected to the front end of the pull block 20. A slot 21 is provided at the rear end, and a pull rod 22 is movably connected inside the slot 21, and the front end of the pull rod 22 is fixedly connected to the rear end of the pull block 20, and the rear end of the pull rod 22 is fixedly connected to a pull button 23, wherein the guide groove 15 is used to lead the upper end of the pulling wire 5 in the tube body 1 out of the tube body 1, and the support wheel 17 is used to support the pulling wire 5 passing through the guide groove 15, and through the rotation cooperation of the wheel axle 18 and the axial hole 16, the pulling wire 5 and the support wheel 17 are in rolling contact, which can reduce friction, and the upper end of the pull block 20 and the pulling wire 5 can be pulled backward through the pull button 23 and the pull rod 22, thereby further driving the baffle 4 to move upward to open the side opening 2.

[0039] In this embodiment, the utility model is provided with three side openings 2 around the front end of the tube body 1, and a blocking piece 4 is further movably provided on the inner side of the side opening 2. At the same time, the blocking piece 4 can be lifted up to open the side opening 2 through the arrangement and cooperation of the limit strip 3 and the pulling line 5. When in use, when the side opening 2 at the front end of the tube body 1 is in place, the side opening 2 can be selected to be opened for use according to which side opening 2 is closest to the respiratory port of the lower lobe, while the other two side openings 2 remain closed so as to align with the respiratory port of the upper lobe for oxygen supply, so as to ensure the oxygen flow and improve the oxygen supply effect of the lung lobe. Compared with the method of rotating and adjusting the tube body 1 in the prior art to align the single side opening 2 at the front end with the respiratory port of the upper lobe, it is more labor-saving and convenient.

[0040] At the same time, through the arrangement and coordination of the three pull sleeves 19 and the inner pull block 20, the pull rod 22 and the pull button 23 provided around the upper end of the tube body 1, the pulling control of the pulling wire 5 and the baffle 4 inside the tube body 1 can be achieved from the outside of the tube body 1, which is labor-saving and convenient.

[0041] Reference Figure 1 、 Figure 2 、 Figure 5 、 Figure 6 and Figure 7As shown, further, the outer wall of the bottom end of the tube body 1 is fixedly connected with an inner air bag 7, the inner air bag 7 is a cylindrical structure, the upper right end of the inner air bag 7 is fixedly connected with an inflation tube 8, and the inflation tube 8 is fixedly connected to the outer wall of the tube body 1, the upper end of the inflation tube 8 is fixedly connected with an inflation valve 9, and the outer wall of the upper end of the inner air bag 7 is fixedly connected with a plurality of upper connecting strips 10. The upper connecting strips 10 are a "V"-shaped structure. There are several lower connecting strips 11, the lower connecting strips 11 are inverted "V" shaped structures, the outer airbag 12 is provided around the outside of the inner airbag 7, the outer airbag 12 is an elliptical structure, and the upper connecting strips 10 and the lower connecting strips 11 are different from the inner airbag 7. One end is fixedly connected to the inner wall of the outer airbag 12, and the upper end of the left side of the outer airbag 12 is fixedly connected to the inflation tube 2 13 and the inflation tube 2 13 is fixedly connected to the outer wall of the tube body 1, and the upper end of the inflation tube 2 13 is fixedly connected to the inflation valve 214, wherein, after the inner airbag 7 is inflated, it is cylindrical. In the figure, the inner airbag 7 is in an uninflated state. After the outer airbag 12 is inflated, it is elliptical. The inner airbag 7 and the outer airbag 12 are connected by a plurality of upper connecting bars 10 and a lower connecting bar 11, which not only ensures the connection between the inner airbag 7 and the outer airbag 12, but also allows the inner airbag 7 in the uninflated state to move a certain distance forward and backward relative to the outer airbag 12. Because the inner airbag 7 is fixed to the outer wall of the tube body 1, the tube body 1 and the inner airbag 7 can both move a certain distance forward and backward relative to the outer airbag 12 to adjust the position of the tube body 1. After the position is aligned, the inner airbag 7 is inflated. The inner airbag 7 is inflated and can fit tightly with the outer airbag 12, thereby realizing the limiting of the inner airbag 7 and the tube body 1 relative to the outer airbag 12. The inflation tube and the inflation valve are used to inflate the airbag, which is a conventional setting of the existing endotracheal tube. The existing structural parts will not be described in detail here.

[0042] When the intubation is in place, the outer airbag 12 is inflated to fix it. At this time, the inner airbag 7 is not inflated, and the outer airbag 12 is movably connected to the inner airbag 7 by the upper connecting bars 10 and the lower connecting bars 11, so that the inner airbag 7 and the tube body 1 can further move forward and backward relative to the outer airbag 12 to adjust the position of the front end of the tube body 1 so that the side opening 2 at the front end of the tube body 1 is better aligned with the respiratory opening of the upper lobe. After alignment, the inner airbag 7 is inflated again. The inner airbag 7 is inflated and can fit tightly with the outer airbag 12 to complete the limitation of the inner airbag 7 and the tube body 1 relative to the outer airbag 12 to prevent the tube body 1 from moving forward and backward, which is convenient to use.

[0043] The usage process and working principle of the present invention are as follows: when in use, the tube body 1 is inserted, and after the outer airbag 12 reaches the opening of the upper lobe, the outer airbag 12 is inflated by the second inflation valve 14 and the second inflation tube 13, and the inner airbag 7 is not inflated. Because the inner airbag 7 is not inflated at this time, and the outer airbag 12 is movably connected to the inner airbag 7 by a plurality of upper connecting strips 10 and the lower connecting strips 11, the inner airbag 7 and the tube body 1 can further move back and forth relative to the outer airbag 12 to adjust the position of the front end of the tube body 1 so that the side opening 2 at the front end of the tube body 1 is better aligned with the respiratory opening of the upper lobe. After the side opening 2 at the front end of the tube body 1 is aligned with the respiratory opening of the upper lobe, the inner airbag 7 is inflated by the first inflation valve 9 and the first inflation tube 8. The inner airbag 7 is inflated and expands to fit tightly with the outer airbag 12 to complete the limitation of the inner airbag 7 and the tube body 1 relative to the outer airbag 12, thereby preventing the tube body 1 from moving back and forth.

[0044] Afterwards, which side opening 2 is opened for use according to which side opening 2 is closest to the lower lung lobe, while the other two side openings 2 remain closed. During the specific operation, the pull button 23 and the pull rod 22 pull the pull block 20 and the upper end of the lifting wire 5 backward. The upper end of the lifting wire 5 is supported by the support wheel 17, and the wheel axle 18 and the shaft hole 16 are rotated together to make the lifting wire 5 and the support wheel 17 in rolling contact, which can reduce friction, and the other sections of the lifting wire 5 are limited by several limiting sleeves 6 to prevent the three lifting wires 5 in the tube body 1 from being entangled together. By lifting the lifting wire 5, the baffle 4 is pulled upward, and the baffle 4 can be moved upward relative to the limiting strip 3, thereby exposing the side opening 2, and then the joint 24 on the tube body 1 is further connected to the external oxygen supply machine for subsequent oxygen supply.

[0045] In addition, the contents not described in detail in this embodiment are all within the scope of existing technology and common knowledge.

[0046] Finally, it should be noted that the above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art will be able to modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein with equivalents. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A tracheal tube that can move forward and backward, comprising a tube body (1), characterized in that: Three side openings (2) are provided around the bottom end of the tube body (1), three baffles (4) are provided around the inside of the bottom end of the tube body (1), and the baffles (4) are located at the rear ends of the side openings (2), and limiting strips (3) are provided on both sides of the baffles (4), the baffles (4) are fixedly connected to the inner wall of the tube body (1), and the baffles (4) are slidably connected to the limiting strips (3), and a lifting line (5) is fixedly connected to the middle position of the upper end of the baffle (4); Three guide grooves (15) are provided around the upper end of the tube body (1), three pull sleeves (19) are fixedly connected to the outer wall of the upper end of the tube body (1), and the pull sleeves (19) are communicated with the guide grooves (15), the front end of the pull sleeve (19) is movably connected to a pull block (20), and the upper end of the pulling line (5) passes through the guide groove (15) and is fixedly connected to the front end of the pull block (20), the rear end of the pull sleeve (19) is provided with a slot (21), the slot (21) is movably connected to a pull rod (22), and the front end of the pull rod (22) is fixedly connected to the rear end of the pull block (20), and the rear end of the pull rod (22) is fixedly connected to a pull button (23); The outer wall of the bottom end of the tube body (1) is fixedly connected to an inner air bag (7), the upper right end of the inner air bag (7) is fixedly connected to an inflation tube (8), and the inflation tube (8) is fixedly connected to the outer wall of the tube body (1), the outer wall of the upper end of the inner air bag (7) is fixedly connected to a plurality of upper connecting strips (10), the outer wall of the bottom end of the inner air bag (7) is fixedly connected to a plurality of lower connecting strips (11), an outer air bag (12) is arranged around the outside of the inner air bag (7), and the ends of the upper connecting strips (10) and the lower connecting strips (11) different from the inner air bag (7) are fixedly connected to the inner wall of the outer air bag (12), the upper left end of the outer air bag (12) is fixedly connected to an inflation tube (13), and the inflation tube (13) is fixedly connected to the outer wall of the tube body (1).

2. The endotracheal tube according to claim 1, wherein: The blocking piece (4) is an arc-shaped structure, and the limiting strip (3) is an "L"-shaped structure.

3. The endotracheal tube that can be moved back and forth according to claim 1, characterized in that: A plurality of limiting sleeves (6) are fixedly connected to the inner wall of the tube body (1) around its periphery, and the pulling wire (5) passes through the limiting sleeves (6).

4. The endotracheal tube capable of moving forward and backward according to claim 1, characterized in that: The inner walls on both sides of the guide groove (15) are provided with an axial hole (16), and a support wheel (17) is provided inside the guide groove (15). The support wheel (17) is an "H" structure, and the pulling line (5) is in contact with the upper end of the support wheel (17). Both ends of the support wheel (17) are fixedly connected with a wheel shaft (18), and the wheel shaft (18) is rotatably connected to the axial hole (16).

5. The endotracheal tube that can be moved forward and backward according to claim 1, characterized in that: The inner air bag (7) is a cylindrical structure, and the outer air bag (12) is an elliptical structure.

6. The endotracheal tube capable of moving forward and backward according to claim 1, characterized in that: The upper connecting bar (10) is a "V"-shaped structure, and the lower connecting bar (11) is an inverted "V"-shaped structure.

7. The endotracheal tube capable of moving forward and backward according to claim 1, characterized in that: The upper end of the first inflation tube (8) is fixedly connected to the first inflation valve (9), and the upper end of the second inflation tube (13) is fixedly connected to the second inflation valve (14).

8. The endotracheal tube capable of moving forward and backward according to claim 1, characterized in that: The upper end of the tube body (1) is snap-connected with a joint (24).

Images