Telescopic T tube for reconstruction of laryngotracheal stenosis

Abstract

The invention relates to the technical field of medical instruments, in particular to a telescopic T tube for laryngotracheal stenosis reconstruction, which comprises a cross arm tube and a vertical arm tube which are integrally formed, telescopic arm tubes are arranged at two ends of the cross arm tube, each telescopic arm tube comprises a telescopic inner tube and a support outer tube, and two ends of the telescopic inner tube are fixedly connected with two ends of the support outer tube; the end, away from the cross arm pipe, of the vertical arm pipe is fixedly connected with an extending arm pipe, an adjusting pipe is in threaded fit with the interior of the extending arm pipe, the inner side wall of the extending arm pipe is fixedly connected with an adjusting part, and the adjusting part adjusts and controls the length of the telescopic inner pipe with the relative spiral displacement of the adjusting pipe and the extending arm pipe as an index; the telescopic arm tube with the telescopic length is additionally arranged on an existing safety T tube, and after a doctor puts the safety T tube into the laryngotrachea of a patient, stretching and retracting of length adjustment are achieved, so that the probability that the matching degree of the T tube and the individualized airway structure of the patient is poor is reduced.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, specifically to a retractable T-tube for laryngotracheal stenosis reconstruction. Background Technology

[0002] The T-tube for laryngotracheal reconstruction is a tubular stent device used to treat larynx or tracheal stenosis. It is a key auxiliary tool in laryngotracheal reconstruction surgery. Its core function is to support the narrowed airway structure, maintain unobstructed breathing, and provide a stable environment for the healing and remodeling of damaged tissues, ultimately helping patients restore normal airway function.

[0003] The commonly used Montgomery Safe-T-Tube mainly consists of a vertical arm that connects to the tracheostomy opening and a horizontal arm that extends below the glottis or deeper into the airway. The section of the vertical arm exposed on the outside of the patient's neck skin usually has a collar-type occlusive plug. The T-tube is surgically inserted into the larynx of patients with laryngeal and tracheal stenosis. The horizontal arm provides physical support to open up the narrowed airway wall, thereby effectively preventing airway restenosis caused by postoperative scar contracture.

[0004] In clinical applications, due to the varying degrees of airway stenosis in patients with laryngotracheal stenosis, the currently mainstream safety T-tubes mostly use standardized tube bodies. These are manually cut by the physician before surgery (i.e., the length of the transverse arm is adjusted) to achieve individualized fit. However, this cutting operation is highly dependent on the surgeon's clinical experience and subjective judgment, and errors in size estimation can easily lead to poor matching between the tube body and the patient's individual airway structure, failing to meet the clinical needs of modern precision medicine. Therefore, it is necessary to propose a retractable T-tube for laryngotracheal stenosis reconstruction that can autonomously adjust the length of the transverse arm to address the aforementioned technical shortcomings. Summary of the Invention

[0005] To address the aforementioned issues, this invention provides a retractable T-tube for laryngotracheal stenosis reconstruction. It adds a retractable arm tube with adjustable length to the existing safety T-tube, allowing the doctor to adjust the length after inserting the safety T-tube into the patient's laryngotrachea, thereby reducing the probability of poor matching between the T-tube and the patient's individual airway structure.

[0006] To achieve the above objectives, the technical solution of the present invention is as follows: a telescopic T-tube for laryngotracheal stenosis reconstruction, comprising an integrally formed horizontal arm tube and a vertical arm tube, wherein telescopic arm tubes are provided at both ends of the horizontal arm tube, and each telescopic arm tube includes a telescopic inner tube and a supporting outer tube, wherein the two ends of the telescopic inner tube are fixedly connected to the two ends of the supporting outer tube.

[0007] An extension arm tube is fixedly connected to the end of the vertical arm tube away from the horizontal arm tube. An adjusting tube is threaded into the extension arm tube. An adjusting component is fixedly connected to the inner wall of the extension arm tube. The adjusting component adjusts the length of the telescopic inner tube based on the relative helical displacement between the adjusting tube and the extension arm tube.

[0008] The technical principle of the above scheme is as follows: This scheme uses a telescopic T-tube for laryngotracheal stenosis reconstruction. The basic support structure is formed by an integrally molded horizontal arm tube and a vertical arm tube. The two ends of the horizontal arm tube are equipped with telescopic arms tubes to lay the foundation for length adjustment. The extension arm tube connected to the end of the vertical arm tube and the adjustment tube generate relative helical displacement through threaded engagement. The adjustment component adjusts the length of the telescopic inner tube based on this displacement, thereby meeting the needs of adaptive adjustment of the overall length of the horizontal arm tube to adapt to the airway stenosis area of ​​different patients as described in the book.

[0009] The above approach has the following beneficial effects:

[0010] 1. The telescopic arm design of this solution allows the T-tube structure to be length-adjusted within the patient's larynx and trachea, eliminating the need for preoperative manual trimming of the transverse arm tube length, thus eliminating size estimation errors caused by differences in surgeon experience and improving the fit between the tube and the patient's individualized airway structure.

[0011] 2. This solution achieves autonomous adjustment of the transverse arm tube length through precise control of the adjusting component based on the helical displacement, meeting the clinical requirements of modern precision medicine for individualized treatment and aligning with the needs of precision medicine.

[0012] 3. The telescopic arm tube of this solution is designed to provide both airway support and length adjustment, enhancing adaptability to different narrow areas while ensuring airway support stability; it can also adapt to the curvature of the patient's larynx and trachea, reducing lateral pressure on the side walls of the patient's larynx and trachea.

[0013] Furthermore, the walls of the telescopic inner tubes are all folded structures, and the walls of the telescopic inner tubes are all provided with shaft-driven air passages corresponding to the shape of the folded walls of the telescopic inner tubes. The adjusting component can fill the shaft-driven air passages with gas.

[0014] Beneficial effects: The adjustable component can introduce gas into the axial drive airway to expand the folded tube wall and achieve length adjustment; it reduces the risk of hard contact and damage to tissues in the body caused by rigid mechanical adjustment, and the flexible and controllable adjustment process significantly improves the patient's long-term tolerance and comfort.

[0015] Furthermore, the supporting outer tube includes an integrally formed first corrugated section and a first support section, with the end of the first corrugated section away from the first support section fixedly connected to one end of the cross arm tube.

[0016] Beneficial effects: The first corrugated section adapts to the telescopic displacement of the inner tube, the first support section ensures the support capacity for the inner wall of the airway, and the elasticity of the first corrugated section can improve the fit with the natural curvature of the airway, reduce the pressure damage to the airway mucosa, and enhance wearing comfort and tolerance.

[0017] Furthermore, the supporting outer tube includes several second corrugated sections and second support sections, which are arranged alternately at intervals along a direction away from the transverse arm tube section.

[0018] Beneficial effects: The flexibility of the short corrugated segments ensures airway fit, while the adjacent support segments work together to enhance the overall mechanical strength against airway pressure, achieving a balance between support performance and clinical adaptability. This breaks through the performance trade-offs limited by the length of a single corrugated segment and meets the needs of more patients.

[0019] Furthermore, the adjusting component includes a ring-shaped compression airbag, and the shaft drive air passages are all connected to the compression airbag.

[0020] Beneficial effects: By compressing the airbag to change its volume, gas is transmitted to the shaft drive airway to adjust the length of the telescopic inner tube. The uniformity of air pressure transmission improves the stability and controllability of the adjustment process.

[0021] Furthermore, a cylindrical extrusion wedge is fixedly connected to the bottom of the regulating tube. The radius of the extrusion wedge decreases along the direction away from the regulating tube, and the outer wall of the extrusion airbag is in contact with the extrusion wedge.

[0022] Beneficial effects: The extrusion wedge with decreasing radius generates radial extrusion force on the extrusion airbag when the spiral displacement of the adjustment tube is adjusted, forcing the volume of the extrusion airbag to change and transport gas. The combination of mechanical extrusion and air pressure transmission achieves precise and controllable adjustment of the length of the telescopic inner tube. The operation is simple and the process is stable.

[0023] Furthermore, both the extension arm tube and the regulating tube are made of silicone. The threaded fit between the extension arm tube and the regulating tube is as follows:

[0024] The inner wall of the extension arm tube has a threaded groove, and the outer wall of the adjustment tube has a threaded protrusion corresponding to the threaded groove. The inner diameter of the extension arm tube is smaller than the outer diameter of the adjustment tube.

[0025] Beneficial effects: Utilizing the elastic properties of silicone material, when the adjusting tube is screwed into the extension arm tube with a smaller inner diameter, the elastic expansion of the extension arm tube generates continuous radial pressure, which, together with the friction between the threaded groove, forms a stable engagement force, improving the stability of the adjustment process and the long-term durability of the structural connection after adjustment.

[0026] Furthermore, a vent pipe is fixedly connected to the top of the regulating pipe, and the inner diameter of the vent pipe is the same as the inner diameter of the vertical arm pipe.

[0027] Beneficial effects: By installing a ventilator with an inner diameter that matches that of the vertical arm tube, a seamless and smooth transition of gas is ensured between the vertical arm tube and the ventilator, maintaining airflow continuity, avoiding resistance and pressure loss caused by changes in tube diameter, and ensuring the normal operation of the airway ventilation function.

[0028] Furthermore, the connection between the two shaft-driven air passages and the compression airbag is specifically as follows:

[0029] The bottom of the compression airbag is connected to two first air supply pipes and two second air supply pipes. The end of each first air supply pipe away from the compression airbag is connected to a shaft-driven air channel, and the connection points between the two first air supply pipes and the shaft-driven air channel are symmetrical. The end of each second air supply pipe away from the compression airbag is connected to a shaft-driven air channel on the other side, and the connection points between the two second air supply pipes and the shaft-driven air channel are symmetrical.

[0030] Beneficial effects: The shaft-driven air passage and the compression airbag are connected by the first and second air supply pipes arranged symmetrically, which ensures the uniformity of gas transmission, reduces local resistance loss, and improves delivery efficiency. At the same time, the symmetrical structure avoids pressure fluctuations on one side and enhances the stability and accuracy of the adjustment process.

[0031] Furthermore, a blocking plug assembly is fitted on the outside of the vent tube to block the flow of gas through the vent tube.

[0032] Beneficial effects: The occlusion plug assembly placed on the outside of the ventilation tube can effectively block gas flow to meet routine needs. At the same time, by observing the changes in the position of the assembly, it is possible to intuitively determine whether the supporting outer tube has shifted, realizing real-time monitoring of the stability of the airway support status, and improving the safety and convenience of clinical use.

[0033] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0034] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the retractable T-tube for laryngotracheal stenosis reconstruction of the present invention;

[0035] Figure 2 This is an axonometric sectional view of the transverse arm tube and the vertical arm tube in an embodiment of the retractable T-tube for laryngotracheal stenosis reconstruction of the present invention;

[0036] Figure 3 This is a detailed axonometric sectional view of the telescopic arm tube in an embodiment of the telescopic T-tube for laryngotracheal stenosis reconstruction of the present invention;

[0037] Figure 4 This is a detailed axonometric sectional view of the extension arm tube in an embodiment of the retractable T-tube for laryngotracheal stenosis reconstruction of the present invention;

[0038] Figure 5 This is a schematic diagram of the second corrugated section and the second support section in an embodiment of the retractable T-tube for laryngotracheal stenosis reconstruction of the present invention.

[0039] The reference numerals in the accompanying drawings include: 1. Horizontal arm tube; 2. Vertical arm tube; 3. Telescopic arm tube; 31. Telescopic inner tube; 311. Shaft-driven air passage; 32. Support outer tube; 321. First corrugated section; 322. First support section; 323. Second corrugated section; 324. Second support section; 4. Extension arm tube; 5. Adjustment tube; 6. Compression airbag; 7. Compression wedge block; 8. First air supply tube; 9. Second air supply tube; 10. Ventilation tube; 11. Blocking plug assembly. Detailed Implementation

[0040] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. 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.

[0041] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0042] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0043] The following detailed description illustrates the specific implementation method:

[0044] Example 1:

[0045] This embodiment provides a retractable T-tube for laryngotracheal stenosis reconstruction, specifically as follows: Figure 1As shown, it includes an integrally formed horizontal arm tube 1 and a vertical arm tube 2; based on the existing technology, after the operation, the horizontal arm tube 1 should be located at the patient's tracheostomy site, while the vertical arm tube 2 should be located inside the patient's trachea, with its length covering the narrow area of ​​the patient's laryngotrachea.

[0046] To address the issue that existing safety T-tubes are difficult to adapt to the varying airway narrowing regions of different patients in clinical applications, this embodiment is unique in that it specifically combines... Figure 1 and Figure 2 As shown:

[0047] Both ends of the horizontal arm tube 1 are provided with telescopic arm tubes 3. Each telescopic arm tube 3 includes a telescopic inner tube 31 and a supporting outer tube 32. The two ends of the telescopic inner tube 31 are fixedly connected to the two ends of the supporting outer tube 32. That is, the telescopic inner tube 31 undertakes the function of axial length adjustment, while the supporting outer tube 32 mainly plays the role of supporting the inner wall of the airway.

[0048] Combination Figure 2 and Figure 3 As shown, the walls of the telescopic inner tube 31 are all folded structures, and each wall of the telescopic inner tube 31 has a corresponding axial drive airway 311. When gas is filled into the axial drive airway 311, the folds of the telescopic inner tube 31 unfold, which can realize the length adjustment of the telescopic inner tube 31. Compared with rigid mechanical adjustment, the gas pressure driven telescopic method does not require hard contact and gaps of mechanical parts in the implantation scenario. It can realize telescopic adjustment through flexible and controllable pneumatic pressure transmission, which reduces the risk of damage and infection to fragile tissues in the body, and can better adapt to the dynamic morphological changes of tissues. At the same time, the gentle adjustment process and frictionless stimulation significantly improve the patient's long-term tolerance and comfort.

[0049] The outer support tube 32 includes an integrally formed first corrugated section 321 and a first support section 322. The end of the first corrugated section 321 away from the first support section 322 is integrally formed with one end of the transverse arm tube 1. Both the first corrugated section 321 and the first support section 322 are made of the same material as the transverse arm tube 1 (preferably implantable silicone in this embodiment). The elastic expansion and contraction characteristics of the first corrugated section 321 are adapted to the expansion and contraction displacement of the telescopic inner tube 31, and the first support section 322 ensures the support capability of the extended section for the patient's airway.

[0050] In addition, (1) the design of the first corrugated section 321 can adapt to the telescopic movement of the telescopic inner tube 31, and can also improve the fit between the first support section 322 and the patient's airway with natural curvature through the flexible rotation of each corrugated unit of the first corrugated section 321, thus avoiding forced correction of the airway shape; compared with the conventional safety T tube, it can reduce the contact pressure of the implant on the side wall of the patient's airway and reduce the pressure damage to the airway mucosa; (2) the integrally formed first corrugated section 321 and first support section 322 allow the first corrugated section 321 to adapt to the slight dynamic changes of the larynx and trachea when the patient breathes or moves slightly, reducing the feeling of foreign body traction and further improving the comfort and tolerance of wearing.

[0051] Based on the above-mentioned method of telescopic adjustment, regarding the drive for gas delivery:

[0052] Combination Figure 1 and Figure 4 As shown, the end of the vertical arm tube 2 away from the horizontal arm tube 1 is clamped to the inherent extension arm tube 4. The extension arm tube 4 is threaded with an adjusting tube 5. The inner wall of the extension arm tube 4 is provided with an adjusting component, which adjusts the length of the telescopic inner tube 31 by using the relative helical displacement between the adjusting tube 5 and the extension arm tube 4 as an indicator. Specifically:

[0053] The adjusting component includes a ring-shaped compression airbag 6, which is thermally fused to the bottom of the inner wall of the extension arm tube 4. The axial drive air passages 311 are all connected to the compression airbag 6. The bottom of the adjusting tube 5 is integrally formed with a cylindrical compression wedge block 7. The radius of the compression wedge block 7 decreases along the direction away from the adjusting tube 5. The outer wall of the compression airbag 6 is in contact with the compression wedge block 7. This design allows medical staff to rotate the adjusting tube 5 along the thread of the extension arm tube 4 by turning the adjusting tube 5, which drives the compression wedge block 7 to move synchronously. The downward spiral displacement of the compression wedge block 7 will gradually generate a continuous radial compression force on the compression airbag 6, forcing the compression airbag 6 to change its volume and transfer gas to each axial drive air passage 311, thereby adjusting the length of the telescopic inner tube 31.

[0054] To ensure the stability of the adjustment and the durability after adjustment, both the extension arm tube 4 and the adjustment tube 5 in this embodiment are made of silicone. The threaded fit between the extension arm tube 4 and the adjustment tube 5 is as follows: the inner wall of the extension arm tube 4 has a threaded groove, and the outer wall of the adjustment tube 5 has a threaded protrusion corresponding to the threaded groove. In particular, the inner diameter of the extension arm tube 4 is smaller than the outer diameter of the adjustment tube 5. When the adjustment tube 5 is screwed into the extension arm tube 4, whose inner diameter is smaller than its outer diameter, along the threaded sliding pair of the threaded protrusion and the threaded groove, the elastic properties of the silicone of the extension arm tube 4 cause its tube wall to expand elastically. This generates friction at the contact interface between the threaded protrusion and the threaded groove, ensuring the stability of the adjustment. At the same time, the expanded tube wall of the extension arm tube 4 forms a continuous radial pressure on the adjustment tube 5. The two work together to form a stable mutual clamping force, ensuring the stability of the adjustment process and the structural durability after adjustment.

[0055] Among them, specifically such as Figure 2 As shown, the connection between the two axial-driven air channels 311 and the compression airbag 6 is as follows: the bottom of the compression airbag 6 is connected to two first air supply pipes 8 and two second air supply pipes 9. The end of each first air supply pipe 8 away from the compression airbag 6 is connected to one of the axial-driven air channels 311, and the connection points between the two first air supply pipes 8 and the axial-driven air channel 311 are symmetrical. The end of each second air supply pipe 9 away from the compression airbag 6 is connected to the axial-driven air channel 311 on the other side, and the connection points between the two second air supply pipes 9 and the axial-driven air channel 311 are symmetrical. This symmetrical arrangement of the first air supply pipes 8 and the second air supply pipes 9 ensures the uniformity of airflow transmission from the compression airbag 6 to each axial-driven air channel 311, reduces local resistance loss, and improves gas delivery efficiency. At the same time, the gas generated when the compression airbag 6 is compressed can be synchronously and quickly transmitted to the axial-driven air channel 311 through the symmetrical pipes. The pressure balance characteristics at the symmetrical connection points can also effectively avoid unilateral pressure fluctuations and enhance the stability and accuracy of the control process.

[0056] This embodiment also includes a vent pipe 10 at the top of the regulating pipe 5, specifically as follows: Figure 4 As shown, the vent pipe 10 and the regulating pipe 5 are integrally formed, and the inner diameter of the vent pipe 10 is the same as the inner diameter of the vertical arm pipe 2. The design that the inner diameter of the vent pipe 10 is the same as the inner diameter of the vertical arm pipe 2 ensures a seamless and smooth transition of airflow between the vertical arm pipe 2 and the vent pipe 10 to maintain airflow continuity and reduce the risk that the design of the regulating pipe 5 will affect the original function of the vertical arm pipe 2.

[0057] like Figure 1As shown, a blocking plug assembly 11 for blocking the gas flow of the ventilation tube 10 is sleeved on the outside of the ventilation tube 10. The blocking plug assembly 11 includes a ring and a plug, with the ring and plug being integrally formed. The ring is sleeved on the outer wall of the ventilation tube 10. In addition to effectively blocking the gas flow of the ventilation tube 10 to meet the needs of conventional use, this design can also visually determine whether the supporting outer tube 32 has shifted by observing the position of the ring (i.e. whether the ventilation tube 10 rotates), thereby realizing the real-time stability monitoring of the support state in the airway.

[0058] Example 2:

[0059] Based on the retractable T-tube for laryngotracheal stenosis reconstruction proposed in Example 1, when the supporting tube 32 is composed of a two-segment first corrugated segment 321 and a first supporting segment 322, the length of the first corrugated segment 321 has a significant inverse correlation with the mechanical properties and clinical adaptability of the supporting tube 32. That is, the longer the first corrugated segment 321, the weaker the supporting strength of the supporting tube 32 against the pressure of the airway sidewall, but the better the morphological adaptability to the natural curvature of the airway. Therefore, the two-segment supporting tube 32 is more suitable for people with lower airway support needs but higher requirements for post-implantation comfort, such as children or elderly patients.

[0060] The difference between this embodiment and Embodiment 1 is that, specifically as follows: Figure 5 As shown, based on the retractable T-tube for tracheal stenosis reconstruction proposed in Example 1, the supporting outer tube 32 is designed to include several second corrugated segments 323 and second supporting segments 324. The several second corrugated segments 323 and second supporting segments 324 are arranged alternately along the direction away from the transverse arm tube 1. With this design, by arranging multiple short-sized second corrugated segments 323 and second supporting segments 324 alternately, the flexibility of the short corrugated segments is used to ensure good fit to the natural curvature of the airway, and the rigid support of adjacent second supporting segments 324 is used to synergistically enhance the overall mechanical strength against airway sidewall pressure. This achieves a better balance between support performance and clinical adaptability, breaking through the performance trade-offs under the length limitation of a single first corrugated segment 321, and can meet the clinical needs of more patients who need both moderate airway support and emphasize implantation comfort.

[0061] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the scope of protection of this invention.

Claims

1. A retractable T-tube for laryngotracheal stenosis reconstruction, comprising an integrally formed horizontal arm tube (1) and a vertical arm tube (2), characterized in that, The horizontal arm tube (1) is provided with telescopic arm tubes (3) at both ends. Each telescopic arm tube (3) includes a telescopic inner tube (31) and a supporting outer tube (32). The two ends of the telescopic inner tube (31) are fixedly connected to the two ends of the supporting outer tube (32). The vertical arm tube (2) is fixedly connected to the end away from the horizontal arm tube (1) with an extension arm tube (4). The extension arm tube (4) is threaded with an adjustment tube (5). An adjustment component is fixedly connected to the inner wall of the extension arm tube (4). The adjustment component adjusts the length of the telescopic inner tube (31) based on the relative helical displacement between the adjustment tube (5) and the extension arm tube (4).

2. The retractable T-tube for laryngotracheal stenosis reconstruction according to claim 1, characterized in that, The walls of the telescopic inner tube (31) are all folded structures. The walls of the telescopic inner tube (31) are all provided with shaft-driven air passages (311) corresponding to the folded shape of the telescopic inner tube (31). The adjusting component can fill the shaft-driven air passages (311) with gas.

3. The retractable T-tube for laryngotracheal stenosis reconstruction according to claim 2, characterized in that, The outer support tube (32) includes an integrally formed first corrugated section (321) and a first support section (322), and the end of the first corrugated section (321) away from the first support section (322) is fixedly connected to one end of the cross arm tube (1).

4. The retractable T-tube for laryngotracheal stenosis reconstruction according to claim 2, characterized in that, The outer support tube (32) includes several second corrugated sections (323) and a second support section (324), which are arranged alternately at intervals along the direction away from the cross arm tube (1).

5. The retractable T-tube for laryngotracheal stenosis reconstruction according to any one of claims 3-4, characterized in that, The adjusting components include a ring-shaped compression airbag (6) and a shaft-driven air passage (311) that are connected to the compression airbag (6).

6. The retractable T-tube for laryngotracheal stenosis reconstruction according to claim 5, characterized in that, The bottom of the regulating tube (5) is fixedly connected to a cylindrical extrusion wedge (7). The radius of the extrusion wedge (7) decreases along the direction away from the regulating tube (5). The outer wall of the extrusion airbag (6) is in contact with the extrusion wedge (7).

7. The retractable T-tube for laryngotracheal stenosis reconstruction according to claim 6, characterized in that, Both the extension arm tube (4) and the adjusting tube (5) are made of silicone. The threaded fit between the extension arm tube (4) and the adjusting tube (5) is as follows: The inner wall of the extension arm tube (4) is provided with a threaded groove, and the outer wall of the adjustment tube (5) is provided with a threaded protrusion corresponding to the threaded groove. The inner diameter of the extension arm tube (4) is smaller than the outer diameter of the adjustment tube (5).

8. The retractable T-tube for laryngotracheal stenosis reconstruction according to claim 7, characterized in that, A vent pipe (10) is fixedly connected to the top of the regulating pipe (5), and the inner diameter of the vent pipe (10) is the same as the inner diameter of the vertical arm pipe (2).

9. The retractable T-tube for laryngotracheal stenosis reconstruction according to claim 8, characterized in that, The connection between the two shaft-driven air passages (311) and the compression airbag (6) is specifically as follows: The bottom of the compression airbag (6) is connected to two first air supply pipes (8) and two second air supply pipes (9). The end of the first air supply pipe (8) away from the compression airbag (6) is connected to a shaft-driven air channel (311), and the connection points of the two first air supply pipes (8) and the shaft-driven air channel (311) are symmetrical to each other. The end of the second air supply pipe (9) away from the compression airbag (6) is connected to the shaft-driven air channel (311) on the other side, and the connection points of the two second air supply pipes (9) and the shaft-driven air channel (311) are symmetrical to each other.

10. The retractable T-tube for laryngotracheal stenosis reconstruction according to claim 9, characterized in that, An obstruction plug assembly (11) is fitted on the outside of the vent tube (10) to block the flow of gas through the vent tube (10).

Images