A catheter for treating a tracheoesophageal fistula

Abstract

The application relates to the technical field of medical devices, in particular to a catheter for treating trachea-esophageal fistula, which comprises a sleeve part, the sleeve part comprises an outer sleeve and a fixed air bag fixedly installed at the bottom end of the outer sleeve outer wall, the outer sleeve is composed of a vertical section and a bending section connected at the top of the vertical section, and an inner sleeve is movably installed in the inner sleeve. After the fixed air bag is fixed in the trachea, the position of the movable air bag is adjusted, the movable air bag is moved to the same height as the fistula, the bolt is pushed to move rightwards by the reset spring, the bolt is inserted into the corresponding positioning hole in a matched mode, the height of the movable air bag can be fixed, then gas is filled into the movable air bag to make the movable air bag expand to contact the trachea wall, the movable air bag is used for plugging the fistula, the secretions and foreign matters in the esophagus are prevented from entering the trachea, and the trachea is prevented from being corroded and damaged.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, specifically to a catheter for treating tracheoesophageal fistula. Background Technology

[0002] A tracheoesophageal fistula is a condition characterized by an abnormal passage between the trachea and esophagus, potentially leading to serious complications. A significant increase in tracheal secretions, resembling salivation, suggests fistula formation. Clinically, it can manifest as severe coughing during drinking or eating, sometimes accompanied by excessive sputum production or fever. To facilitate treatment and management of the fistula, a tracheostomy tube is used to seal the trachea. A tracheostomy tube typically consists of a cannula and a cuff. After the cannula is inserted into the trachea, the cuff is positioned below the fistula opening. Inflating the cuff seals the trachea, isolating the fistula opening and distal bronchi, thus preventing food from flowing into the lungs.

[0003] For example, the invention patent with application number 202010198819.9 discloses a tracheostomy cannula, which includes a cannula body. An irrigation tube and a breathing tube are respectively inserted through the cannula body along its axial direction. The irrigation tube is located on one side of the breathing tube. A transfer tube is provided along the radial direction of the cannula body from the irrigation tube. The transfer tube communicates with the irrigation tube. The transfer tube at least partially surrounds the outside of the breathing tube, and the inside of the transfer tube communicates with the breathing tube. The tracheostomy cannula provided by this invention has a simple structure and can effectively remove foreign objects adhering to the inner wall of the tracheostomy cannula from multiple directions.

[0004] However, the above-mentioned tracheostomy tube still has the following shortcomings in the treatment of tracheoesophageal fistula: Although the balloon isolates the fistula and the distal bronchus to prevent food from flowing into the lungs, gastric juice and food leaking from the esophagus into the trachea will still accumulate above the balloon. This part of the gastric juice and food that enters the trachea can easily corrode and irritate the trachea, leading to tracheal damage. Summary of the Invention

[0005] To address the aforementioned problems, the present invention provides a catheter for treating tracheoesophageal fistula, comprising a cannula assembly. The cannula assembly includes an outer cannula and a fixed balloon fixedly installed at the bottom of the outer annular wall of the outer cannula. The outer cannula consists of a vertical section and a bent section connected to the top of the vertical section. An inner cannula is movably installed inside the outer cannula.

[0006] The sealing component includes a movable airbag that is movably fitted onto the outside of the vertical section of the outer sleeve. The outer sleeve is equipped with a moving component for moving the movable airbag up and down, and a locking component for locking the movable airbag.

[0007] The movable component includes a stainless steel ring fixedly installed inside the movable airbag and sleeved on the outside of the vertical section of the outer sleeve, and a magnetic ring is slidably installed on the inner ring wall of the vertical section of the outer sleeve.

[0008] The locking assembly includes a pin that slides left and right on the right side of the magnetic ring. A return spring is fixedly connected between the left side of the pin and the inner wall of the magnetic ring. Several positioning holes are evenly distributed vertically on the inner ring wall of the vertical section of the outer sleeve.

[0009] In one possible implementation, the fixed airbag is located below the movable airbag, the top of the fixed airbag is provided with a bowl-shaped groove, and the bottom end of the fixed airbag is fixedly connected to an air supply tube. The end of the air supply tube away from the fixed airbag passes through the inner cavity of the outer sleeve and extends to the outside of the outer sleeve.

[0010] In one possible implementation, a plurality of stretch membranes are fixedly installed inside the movable airbag, which are distributed vertically at equal intervals. The stretch membranes are horizontally arranged and connected between the outer wall and the inner wall of the movable airbag, and the stretch membranes are provided with through holes.

[0011] In one possible implementation, a guide groove is formed on the outer ring wall of the magnetic ring, and a guide rib is fixedly connected to the inner ring wall of the vertical section of the outer sleeve. The guide groove and the guide rib are slidably connected up and down, and a number of circumferentially evenly distributed balls are rotatably installed on the inner ring wall of the stainless steel ring.

[0012] In one possible implementation, a steel wire rope for moving the magnetic ring up and down is movably mounted on the top of the magnetic ring. The top end of the steel wire rope passes through the inner cavity of the outer sleeve and extends to the outside of the outer sleeve. Several fixing rings for guiding the steel wire rope are installed on the inner wall of the bent section of the outer sleeve. The steel wire rope passes through several fixing rings.

[0013] In one possible implementation, the magnetic ring is further equipped with a blocking unit, the blocking unit including a concave frame fixedly connected to the left side of the pin, a threaded sleeve fixedly installed on the top of the magnetic ring, a threaded block being threadedly connected inside the threaded sleeve, the bottom end of the threaded block being movably inserted into the top of the concave frame, and the bottom end of the wire rope being fixedly connected to the top of the threaded block.

[0014] In one possible implementation, the top of the active airbag is fixedly connected to an air supply tube two, which is spirally wound around the outside of the outer sleeve and extends to the top of the outer sleeve. The air supply tube two is adhered to the outer wall of the outer sleeve by adhesive.

[0015] The beneficial effects of this invention are as follows: 1. After the fixed airbag is fixed in the trachea, the magnetic ring is moved up and down. The attraction of the magnetic ring drives the stainless steel ring and the movable airbag to move up and down together, adjusting the position of the movable airbag so that it is at the same height as the fistula. The reset spring pushes the pin to the right so that the pin is engaged with the corresponding positioning hole, which can fix the height of the movable airbag. Then, gas is filled into the movable airbag and it expands to contact the tracheal wall. The movable airbag is used to seal the fistula, preventing secretions and foreign objects in the esophagus from entering the trachea and causing corrosion and damage to the trachea.

[0016] 2. This invention connects the outer and inner walls of the movable airbag together using a membrane. The through-hole ensures gas flow between the chambers on both sides of the membrane. When the movable airbag is filled with gas, the membrane can hold the outer wall of the movable airbag in place, preventing the middle part of the outer wall from bulging outward due to lack of connection. This ensures that the outer wall of the movable airbag fits completely with the trachea, and at the same time, keeps the pressure on the trachea consistent between the middle and edge parts of the outer wall of the movable airbag, preventing greater pressure from being generated in the middle part of the outer wall of the movable airbag. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural schematic diagram of the present invention; Figure 2 This is a cross-sectional view of the front of the invention; Figure 3 This is a partial cross-sectional view of the active airbag of the present invention; Figure 4 This is a three-dimensional structural diagram of the inner magnetic ring of the present invention; Figure 5 This is a partial cross-sectional view of the locking unit of the present invention; Figure 6 This is a partial cross-sectional view of the outer sleeve of the present invention; Figure 7 This is a top sectional view of the vertical section of the outer sleeve of the present invention.

[0018] In the diagram: 1. Sleeve assembly; 11. Outer sleeve; 111. Guide rib; 112. Fixing ring; 12. Fixing airbag; 121. Groove; 13. Inner sleeve; 14. Gas supply pipe one; 2. Sealing assembly; 21. Movable airbag; 211. Membrane pull; 212. Through hole; 22. Moving assembly; 221. Stainless steel ring; 2211. Ball bearing; 222. Magnetic ring; 2221. Guide groove; 223. Steel wire rope; 23. Locking assembly; 231. Pin; 232. Return spring; 233. Positioning hole; 234. Barrier unit; 2341. Concave frame; 2342. Threaded sleeve; 2343. Threaded block; 24. Gas supply pipe two. Detailed Implementation

[0019] To make the above-mentioned objects, features, and advantages of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of the present invention. However, the present invention can be implemented in many other ways different from those described below, and those skilled in the art can make similar modifications without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0020] Please see Figure 1 - Figure 7 A catheter for treating tracheoesophageal fistula includes a cannula component 1, which includes an outer cannula 11 and a fixed balloon 12 fixedly installed at the bottom of the outer annular wall of the outer cannula 11. The outer cannula 11 consists of a vertical section and a bent section connected to the top of the vertical section. An inner cannula 13 is movably installed inside the outer cannula 11.

[0021] The sealing component 2 includes a movable airbag 21 that is movably fitted onto the outside of the vertical section of the outer tube 11. The outer tube 11 is equipped with a moving component 22 for moving the movable airbag 21 up and down, and a locking component 23 for locking the movable airbag 21.

[0022] The movable component 22 includes a stainless steel ring 221 fixedly installed inside the movable airbag 21 and sleeved on the outside of the vertical section of the outer sleeve 11. A magnetic ring 222 is slidably installed on the inner ring wall of the vertical section of the outer sleeve 11, and the magnetic ring 222 is located inside the stainless steel ring 221.

[0023] The locking component 23 includes a pin 231 that is slidably mounted on the right side of the magnetic ring 222. A return spring 232 is fixedly connected between the left side of the pin 231 and the inner wall of the magnetic ring 222. Several positioning holes 233 are evenly distributed vertically on the inner ring wall of the vertical section of the outer sleeve 11.

[0024] In practical use, when performing a tracheotomy to treat a tracheoesophageal fistula, the bottom end of the outer tube 11 is inserted into the patient's trachea through the tracheal incision. The fixation cuff 12 is moved to below the fistula opening, and then gas is inflated into the fixation cuff 12 until it contacts the tracheal wall. The fixation cuff 12 is used to block the trachea, preventing foreign objects in the esophagus from entering the lungs and causing symptoms such as coughing. Air enters the lungs through the outer tube 11, keeping breathing unobstructed. The inner tube 13 can be removed from the outer tube 11 for easy cleaning and replacement, reducing the accumulation of secretions and preventing secretions from clogging the outer tube 11.

[0025] After fixing the fixed airbag 12 in the trachea, the magnetic ring 222 is moved up and down. The attraction force of the magnetic ring 222 drives the stainless steel ring 221 and the movable airbag 21 to move up and down together, adjusting the position of the movable airbag 21 so that it is at the same height as the fistula. The return spring 232 pushes the pin 231 to the right, so that the pin 231 is engaged with the corresponding positioning hole 233, which can fix the height of the movable airbag 21. Then, gas is filled into the movable airbag 21 to expand it until it contacts the tracheal wall. The movable airbag 21 is used to seal the fistula, preventing secretions and foreign objects in the esophagus from entering the trachea and causing corrosion and damage to the trachea.

[0026] Please see Figure 1 and Figure 2 The fixed airbag 12 is located below the movable airbag 21. The top of the fixed airbag 12 is provided with a bowl-shaped groove 121. The bottom end of the fixed airbag 12 is fixedly connected to an air supply tube 14. The end of the air supply tube 14 away from the fixed airbag 12 passes through the inner cavity of the outer sleeve tube 11 and extends to the outside of the outer sleeve tube 11.

[0027] In practical use, the groove 121 at the top of the fixed airbag 12 can hold tracheal secretions and a small amount of liquid that may leak from the gap between the movable airbag 21 and the trachea, preventing secretions and liquid from always being in contact with the tracheal wall and reducing irritation to the trachea. After inserting the outer tube 11 into the trachea, the air supply tube 14 is connected to the existing air pump, and gas is delivered to the fixed airbag 12 through the air supply tube 14, causing the fixed airbag 12 to expand outward and block the trachea.

[0028] When it is time to remove the outer tube 11, the gas in the fixing airbag 12 is extracted through the air supply tube 14, causing the fixing airbag 12 to contract and release the blockage on the air tube, and then the outer tube 11 can be removed from the air tube.

[0029] Please see Figure 2 and Figure 3 The active airbag 21 has several tension membranes 211 that are equidistantly distributed vertically inside. The tension membranes 211 are horizontally arranged and connected between the outer and inner walls of the active airbag 21. The tension membranes 211 have through holes 212.

[0030] In practical use, the outer wall of the movable airbag 21 is connected to the inner wall of the movable airbag 21 by the membrane 211. The through hole 212 ensures the airflow between the chambers on both sides of the membrane 211. When the movable airbag 21 is filled with gas, the membrane 211 can hold the outer wall of the movable airbag 21, preventing the middle part of the outer wall of the movable airbag 21 from bulging outward due to lack of connection. This ensures that the outer wall of the movable airbag 21 is completely attached to the trachea, and at the same time, it keeps the pressure on the trachea consistent between the middle part and the edge part of the outer wall of the movable airbag 21, preventing greater pressure from being generated in the middle part of the outer wall of the movable airbag 21.

[0031] Please see Figure 2 , Figure 3 , Figure 4 and Figure 7 The outer ring wall of the magnetic ring 222 is provided with a guide groove 2221, and the inner ring wall of the vertical section of the outer sleeve 11 is fixedly connected with a guide rib 111. The guide groove 2221 and the guide rib 111 are slidably connected up and down. Several circumferentially evenly distributed balls 2211 are rotatably installed on the inner ring wall of the stainless steel ring 221.

[0032] In practical use, when the magnetic ring 222 slides up and down inside the vertical section of the outer sleeve 11, the guide rib 111 guides and limits the guide groove 2221, so that the magnetic ring 222 can only move up and down, preventing the magnetic ring 222 from rotating and improving the stability of the magnetic ring 222 when it moves. By setting ball bearings 2211 on the inner wall of the stainless steel ring 221, the friction between the stainless steel ring 221 and the outer sleeve 11 can be reduced, which is conducive to the stainless steel ring 221 sliding on the outer ring wall of the outer sleeve 11, and makes it convenient to adjust the height of the active airbag 21.

[0033] Please see Figure 1 , Figure 2 and Figure 6 A steel wire rope 223 is movably installed on the top of the magnetic ring 222 to drive the magnetic ring 222 to move up and down. The top end of the steel wire rope 223 passes through the inner cavity of the outer sleeve 11 and extends to the outside of the outer sleeve 11. Several fixing rings 112 for guiding the steel wire rope 223 are installed on the inner wall of the bent section of the outer sleeve 11. The steel wire rope 223 passes through several fixing rings 112.

[0034] In practical use, when adjusting the up-and-down movement of the magnetic ring 222, the magnetic ring 222 is moved upward by pulling the steel wire rope 223 upward, and downward by pushing the steel wire rope 223 downward, so that the magnetic ring 222 moves up and down in the vertical section of the outer tube 11, thereby moving the stainless steel ring 221 and the movable airbag 21 up and down. The fixed ring 112 guides and limits the steel wire rope 223, allowing the steel wire rope 223 to move along the fixed ring 112, preventing the steel wire rope 223 from bending and accumulating in the bending section of the outer tube 11, and ensuring that the steel wire rope 223 moves smoothly in the outer tube 11.

[0035] Please see Figure 2 , Figure 4 and Figure 5The magnetic ring 222 is also equipped with a blocking unit 234. The blocking unit 234 includes a concave frame 2341 fixedly connected to the left side of the pin 231. A threaded sleeve 2342 is fixedly installed on the top of the magnetic ring 222. A threaded block 2343 is threadedly connected inside the threaded sleeve 2342. The bottom end of the threaded block 2343 is movably inserted into the top of the concave frame 2341. The bottom end of the wire rope 223 is fixedly connected to the top of the threaded block 2343.

[0036] In practical use, in the initial state, the bottom end of the threaded block 2343 is inserted into the threaded sleeve 2342. The threaded block 2343 is used to limit the concave frame 2341, so that the pin 231 retracts into the inside of the magnetic ring 222, preventing the pin 231 from engaging with the positioning hole 233. At this time, the magnetic ring 222 can move freely up and down on the inner wall of the outer sleeve 11. Since the threaded block 2343 and the threaded sleeve 2342 are threaded together, when the magnetic ring 222 is moved up and down, the wire rope 223 will drive the threaded block 2343 and the threaded sleeve 2342 to move up and down together, so that the threaded sleeve 2342 drives the magnetic ring 222 to move up and down for adjustment.

[0037] After adjusting the magnetic ring 222 to the same height as the fistula opening, the threaded block 2343 is rotated by rotating the wire rope 223, causing the threaded block 2343 to move upward. When the bottom of the threaded block 2343 separates from the concave frame 2341, the threaded block 2343 is no longer obstructed. At this time, the return force of the return spring 232 pushes the pin 231 to the right, so that the pin 231 is inserted into the corresponding positioning hole 233. The pin 231 is used to limit the magnetic ring 222, preventing the magnetic ring 222 from moving up and down, thereby ensuring that the movable airbag 21 is at the same height as the fistula opening, which facilitates the movable airbag 21 to block the fistula opening.

[0038] Please see Figure 1 The top of the active airbag 21 is fixedly connected to an air supply tube 24. The air supply tube 24 is spirally wound around the outside of the outer tube 11 and the top of the air supply tube 24 extends to the top of the outer tube 11. The air supply tube 24 is glued to the outer wall of the outer tube 11 with adhesive.

[0039] In practical use, the second air supply tube 24 is connected to the existing air pump. When the movable airbag 21 moves up and down along the vertical section of the outer sleeve 11, the spiral section of the second air supply tube 24 can be extended and retracted to meet the needs of the movable airbag 21 to move up and down. The second air supply tube 24 is fixed with adhesive tape, which can make the second air supply tube 24 fit tightly at the bend of the outer sleeve 11 and prevent the second air supply tube 24 from becoming loose. Gas is injected into the movable airbag 21 through the second air supply tube 24, so that the movable airbag 21 expands to contact the tracheal wall, which makes it convenient for the movable airbag 21 to seal the fistula.

[0040] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "connected," "installed," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, an integral connection, or a sliding 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 communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0041] The embodiments described herein are preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Therefore, all equivalent changes made based on the structure, shape, and principle of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A catheter for treating tracheoesophageal fistula, characterized in that, include: The sleeve component (1) includes an outer sleeve (11) and a fixed airbag (12) fixedly installed at the bottom of the outer ring wall of the outer sleeve (11). The outer sleeve (11) is composed of a vertical section and a bent section connected to the top of the vertical section. An inner sleeve (13) is movably installed inside the outer sleeve (11). The sealing component (2) includes an active airbag (21) that is movably fitted on the outside of the vertical section of the outer tube (11). The outer tube (11) is equipped with a moving component (22) for moving the active airbag (21) up and down, and a locking component (23) for locking the active airbag (21). The moving component (22) includes a stainless steel ring (221) fixedly installed inside the active airbag (21) and sleeved on the outside of the vertical section of the outer sleeve (11), and a magnetic ring (222) is slidably installed on the inner ring wall of the vertical section of the outer sleeve (11). The locking component (23) includes a pin (231) that slides left and right on the right side of the magnetic ring (222). A reset spring (232) is fixedly connected between the left side of the pin (231) and the inner wall of the magnetic ring (222). Several positioning holes (233) are equidistantly distributed on the inner ring wall of the vertical section of the outer sleeve (11).

2. The catheter for treating tracheoesophageal fistula according to claim 1, characterized in that: The fixed airbag (12) is located below the movable airbag (21). The top of the fixed airbag (12) is provided with a bowl-shaped groove (121). The bottom end of the fixed airbag (12) is fixedly connected to an air supply tube (14). The end of the air supply tube (14) away from the fixed airbag (12) passes through the inner cavity of the outer tube (11) and extends to the outside of the outer tube (11).

3. The catheter for treating tracheoesophageal fistula according to claim 1, characterized in that: The active airbag (21) has several tension membranes (211) that are equidistantly distributed vertically inside. The tension membranes (211) are horizontally arranged and connected between the outer wall and the inner wall of the active airbag (21). The tension membranes (211) have through holes (212).

4. The catheter for treating tracheoesophageal fistula according to claim 1, characterized in that: The outer ring wall of the magnetic ring (222) is provided with a guide groove (2221), and the inner ring wall of the vertical section of the outer sleeve (11) is fixedly connected with a guide rib (111). The guide groove (2221) and the guide rib (111) are slidably connected up and down. Several circumferentially evenly distributed balls (2211) are rotatably installed on the inner ring wall of the stainless steel ring (221).

5. A catheter for treating tracheoesophageal fistula according to claim 4, characterized in that: The top of the magnetic ring (222) is movably mounted with a steel wire rope (223) for driving the magnetic ring (222) to move up and down. The top of the steel wire rope (223) passes through the inner cavity of the outer tube (11) and extends to the outside of the outer tube (11). Several fixing rings (112) for guiding the steel wire rope (223) are installed on the inner wall of the bent section of the outer tube (11). The steel wire rope (223) passes through several fixing rings (112).

6. A catheter for treating tracheoesophageal fistula according to claim 5, characterized in that: The magnetic ring (222) is also equipped with a blocking unit (234). The blocking unit (234) includes a concave frame (2341) fixedly connected to the left side of the pin (231). A threaded sleeve (2342) is fixedly installed on the top of the magnetic ring (222). A threaded block (2343) is threadedly connected inside the threaded sleeve (2342). The bottom end of the threaded block (2343) is movably inserted into the top of the concave frame (2341). The bottom end of the wire rope (223) is fixedly connected to the top of the threaded block (2343).

7. The catheter for treating tracheoesophageal fistula according to claim 1, characterized in that: The top of the active airbag (21) is fixedly connected to an air supply tube (24), which is spirally wound around the outside of the outer tube (11) and the top end of the air supply tube (24) extends to the top of the outer tube (11). The air supply tube (24) is glued to the outer wall of the outer tube (11) with adhesive.

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