Biliary drainage tube carrying radioactive seeds

Abstract

The utility model relates to the field of medical apparatus and instruments, concretely relates to a carrying radioactive particle's biliary tract drainage tube, include: tube body, particle storehouse structure, pull wire, butt joint, screw cap, connecting pipe, control portion, movable arm, winding shaft. The utility model's carrying radioactive particle's biliary tract drainage tube, the combination of particle and drainage tube not only solves the physical drainage of biliary tract obstruction, but also solves the problem that the biliary tract cancer radiation therapy particle cannot be fixed. The doctor can accurately and flexibly control the radiation dose of the radiation therapy of the cancerous site according to the condition of the cancerous site of the patient. The radioactive particle can be easily taken out after the treatment, which is beneficial to the physical recovery of the patient, simple to operate, convenient and practical.

Description

Technical Field

[0001] This utility model relates to the field of medical devices, and more specifically, to a biliary drainage tube carrying radioactive particles. Background Technology

[0002] Biliary drainage tubes are a widely used medical technique, especially in hepatobiliary and pancreatic surgery. They can effectively alleviate the condition of patients with biliary obstruction caused by malignant tumors. For patients with malignant biliary obstruction who cannot undergo radical surgical resection, endoscopic placement of biliary drainage tubes is the best and preferred method. It is minimally invasive and has few complications. Through the installation of biliary drainage tubes, biliary obstruction can be quickly relieved, biliary pressure can be reduced, and drainage can be unobstructed, thereby rapidly alleviating the patient's condition, controlling infection, and allowing the bile duct to function more normally with the assistance of biliary drainage tubes. Different types of biliary drainage tubes can also be selected according to different situations during the operation to facilitate biliary healing and reduce biliary complications after liver transplantation.

[0003] However, existing biliary drainage tubes only relieve biliary obstruction when in use, and have no therapeutic or growth-controlling effect on biliary tumors themselves. They are quite limited and have a short service life. Summary of the Invention

[0004] To address the aforementioned problems, the purpose of this invention is to provide a biliary drainage tube that carries radioactive particles.

[0005] The objective of this utility model is achieved through the following technical solution: This utility model provides a biliary drainage tube carrying radioactive particles, comprising: a tube body, a particle chamber structure, a pull wire, a connector, a tightening cap, a connecting tube, a control unit, a movable arm, and a winding shaft; The front end of the tube is bent into a pig tail shape; the tube is a single cavity that runs through the tube and serves as a drainage channel; several drainage holes are provided on the bent part of the front end of the tube; a imaging ring and a first pull wire hole are provided on the bent front end of the tube; a marker ring and a second pull wire hole are provided on the tube at the junction of the bent front end and the tube. The tube body is equipped with a particle chamber structure, which contains radioactive particles. The rear end of the tube body is connected to a connector and a connecting tube in sequence. A tightening cap is provided at the connection between the tube body and the connector to tighten and seal the connection. The connecting tube is fitted with a control part, which has a groove. A movable arm is movably installed in the groove. A through groove is provided on the movable arm. A winding shaft is movably installed in the through groove. The connecting tube is equipped with a wire pull hole and anti-slip teeth that mesh with the winding shaft. One end of the pull wire is fixed to the rear end of the tube. After passing through the tube forward, it passes out through the first pull wire hole and then through the second pull wire hole. After passing through the tube and connecting tube in sequence, it passes out through the pull wire exit hole and is wound on the winding shaft.

[0006] Furthermore, the outer walls on both sides of the movable arm are provided with locking protrusions for locking, and the inner walls of the corresponding grooves are provided with locking recesses. The inner walls of the grooves are provided with guide grooves located above the locking recesses.

[0007] Furthermore, the point where the lower end of the movable arm contacts the connecting tube is an eccentric protrusion, which is directly opposite the cable outlet hole.

[0008] Furthermore, the control part is axially attached to the middle part of the connecting pipe. The control part is provided with a rectangular groove. The two long sides of the groove are raised in the middle in an arc shape, and the two short sides are flat.

[0009] Furthermore, the winding shaft has raised gears on both sides and a recessed winding groove in the middle.

[0010] Furthermore, silicone sheets are attached to the inner walls on both sides of the winding groove.

[0011] Furthermore, at the head end of the movable arm, there is an arc-shaped extension that serves as an operating handle.

[0012] Furthermore, a Luer connector is attached to the end of the connecting pipe furthest from the butt joint.

[0013] Furthermore, the drainage hole is elliptical along the radial direction of the tube body.

[0014] Furthermore, the particle chamber structure is composed of several particle chambers connected radially in sequence.

[0015] This invention relates to a biliary drainage tube carrying radioactive particles. The combination of the particles and the drainage tube not only solves the problem of physical drainage for biliary obstruction but also addresses the issue of particle fixation during radiotherapy for biliary cancer. Doctors can precisely and flexibly control the radiation dose to treat the cancerous area based on the patient's specific location. The radioactive particles can be easily removed after treatment, benefiting the patient's recovery. The procedure is simple, convenient, and practical. Attached Figure Description

[0016] The accompanying drawings, which are included to provide a further understanding of the present invention and form part of this application, illustrate exemplary embodiments of the present invention and, together with the description thereof, serve to explain the present invention and do not constitute an undue limitation thereof. In the drawings: Figure 1 This is an overall structural diagram of a biliary drainage tube carrying radioactive particles according to this utility model. Figure 2This is an overall structural diagram of another state of the biliary drainage tube carrying radioactive particles of this utility model. Figure 3 This is a cross-sectional view of the front end of the biliary drainage tube carrying radioactive particles according to this utility model. Figure 4 This is a cross-sectional view of the control part in the biliary drainage tube carrying radioactive particles of this utility model. Figure 5 This is a cross-sectional view of the control unit in the biliary drainage tube carrying radioactive particles of this utility model, in another state. Figure 6 This is an exploded cross-sectional view of the control unit in the biliary drainage tube carrying radioactive particles of this utility model. Figure 7 This is a structural diagram of the winding shaft in the biliary drainage tube carrying radioactive particles according to this utility model; The attached figures are labeled as follows: 1. Tube body; 2. Particle chamber structure; 3. Pull wire; 4. Connector; 5. Tightening cap; 6. Connecting tube; 7. Control unit; 8. Movable arm; 9. Winding shaft; 10. Drainage hole; 11. Developing ring; 12. First pull wire hole; 13. Marking ring; 14. Second pull wire hole; 15. Radioactive particle; 16. Groove; 17. Through groove; 18. Anti-slip teeth; 19. Locking protrusion; 20. Locking concave point; 21. Guide groove; 22. Eccentric protrusion; 23. Pull wire outlet hole; 24. Raised gear; 25. Winding groove; 26. Operating handle; 27. Particle chamber. Detailed Implementation

[0017] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of the present invention.

[0018] like Figures 1 to 7 As shown, based on the shortcomings of existing technical solutions, this utility model adopts a method combining radioactive iodine-125 particles with a biliary drainage stent to provide continuous radiation therapy for biliary cancer while draining bile. It is a biliary drainage tube that can carry radioactive particles 15.

[0019] The biliary drainage tube carrying radioactive particles consists of a biliary drainage tube, a particle chamber structure 2 integrally formed with the biliary drainage tube, and a pull wire 3. The biliary drainage tube includes a tube body 1, a tail-end control part 7, and a connecting part. The particle chamber structure 2 and the tail-end control part 7 are the key components of this invention.

[0020] The biliary drainage tube carrying radioactive particles 15 has a tube body 1 made of imported polyurethane (TPU) material, which has good biocompatibility, elasticity, and is not easily deformed. Tube body 1 is a long tube, with the diameter gradually decreasing at the front end, curving into a pig-tail shape. The diameter varies from 5-10 Fr, and the length is 26-45 cm. The entire tube body 1 is a single-lumen tube, with the lumen running through the tube body 1, serving as a drainage channel. Drainage holes 10 are evenly spaced on the inner curved section at the front end of tube body 1. The drainage holes 10 are elliptical radially along tube body 1; this elliptical design maximizes the drainage capacity of the drainage holes 10.

[0021] The tube body 1 has a conical head at its front end, inlaid with a contrast ring 11. With the aid of a contrast instrument, the doctor can determine whether the biliary drainage tube has been inserted into the gallbladder. At the curved outer edge of the tube body 1 behind the contrast ring 11, there is a micro-hole for a pull wire 3, namely the first pull wire hole 12, allowing the pull wire 3 to pass through the tube body 1. The drainage hole 10 is located at the inner bend at the front end of the tube body 1. The drainage hole 10 is an elliptical hole that elongates radially along the tube wall. The elliptical shape is the best choice to maximize the drainage of the drainage hole 10 within a relatively small tube diameter, effectively preventing blockage by viscous or flocculent bile and maintaining unobstructed drainage.

[0022] A marker ring 13 is also embedded at the junction of the curved section at the front end of the biliary drainage tube and the tube body 1. With the help of instruments, doctors can determine whether the curved section of the tube body 1 has completely entered the gallbladder. There is a micro-hole for a pull wire 3, namely the second pull wire hole 14, between the marker ring 13 and the beginning of the curve of the tube body 1, so that the pull wire 3 can enter the tube body 1.

[0023] The tube body 1 following the Mark ring 13 has a particle chamber strip 8-15cm long, integrally formed with the tube wall. The particle chamber strip is composed of individual particle chambers 27 connected radially, with a 5mm gap between each connected particle chamber 27. The particle chamber 27 opens outside the tube wall. Hidden inside the tube wall, the particle chamber 27 is a cylindrical cavity 5mm long and 0.3-0.8mm wide. The front end of the cylindrical cavity has an angled particle placement channel. At the connection between the cavity of the particle chamber 27 and the particle placement channel, there is a small angled platform to prevent particle slippage after placement. The particle placement channel opening is 0.2mm wide. The opening of the particle placement channel is smaller than the particle diameter to prevent particle slippage and loss after placement into the particle chamber 27. The design of the particle chamber 27 allows doctors to accurately load the required number of particles according to the length of the patient's cancerous lesion for precise radiotherapy.

[0024] The rear end of the tube body 1 is the connecting part and the control part 7. The connecting part includes a connector 4 and a tightening cap 5. After inserting the tube body 1 into the protrusion of the connector 4, tighten the tightening cap 5 to fully connect the tube body 1 and the connector 4 and seal them. The connection with the drainage structure is a Luer connector, which can be tightened to connect with negative pressure syringes, drainage bags, etc.

[0025] The control part 7 of the tube body 1 mainly consists of a fixing structure and a pull cable 3. Pulling the pull cable 3 causes the curved part at the front end of the tube body 1 to form a ring, fixing the front end of the tube body 1 in the gallbladder and preventing the bile duct drainage tube from slipping out. The control part 7 is axially attached to the middle part of the connecting tube 6 and is a rectangular groove 16. The two long sides of the groove 16 are raised in the middle in an arc shape, and the two short sides are flat. Inside the groove 16 enclosed by the four sides, there is a movable arm 8. One end of the movable arm 8 is fixed to one end of the groove 16 by a shaft connection, allowing the movable arm 8 to move up and down within the groove 16.

[0026] At the other end of the movable arm 8, there is a rectangular horizontal through-slot 17. A gear-shaped winding shaft 9 is connected within the through-slot 17. The winding shaft 9 has protruding gears 24 on both sides and a recessed winding groove 25 in the middle. The winding groove 25 in the middle of the winding shaft 9 has silicone sheets attached to the inner walls on both sides of the winding groove 25 to prevent the pull wire 3 from unraveling after winding. The outer edge of the protruding gears 24 of the winding shaft 9 protrudes outside the movable arm 8. The protruding gears 24 allow the doctor to easily wind and pull the pull wire 3 by manipulating the winding shaft 9. At the end of the movable arm 8 where the winding shaft 9 is located, there is an arc-shaped extension that serves as an operating handle 26, allowing for easy opening or pressing of the movable arm 8.

[0027] The movable arm 8 has locking protrusions 19 on both sides of its outer wall, and corresponding locking recesses 20 on the inner wall of the groove 16, with guide grooves 21 on the upper part of the locking recesses 20. The bottom of the groove 16 has a connecting tube 6 with a corresponding outer edge of the gear. The point where the lower end of the movable arm 8 contacts the connecting tube 6 is an eccentric protrusion 22. On the wall of the connecting tube 6 opposite the eccentric protrusion 22, there is a pull wire outlet hole 23 with a large inclination angle, allowing the pull wire 3 to pass through the connecting tube 6 from inside the connecting tube 6 and be wound on the winding shaft 9.

[0028] During the procedure, the doctor can pry open the movable arm 8, raising it to the raised position, and then move the winding shaft 9 to tighten the pull wire 3. This pulls the curved section at the front end of the tube 1, causing it to bend into a ring shape. Pressing down on the movable arm 8 engages the gear on the winding shaft 9 with the anti-slip teeth 18 on the connecting tube 6. The locking protrusions 19 on both sides of the movable arm 8 engage with the locking recesses 20 on the inner wall of the groove 16, locking the movable arm 8 within the groove 16 and preventing it from loosening. This prevents the annular bend of the tube 1 from loosening or deforming, fixing the annular bend at the front end of the tube 1 within the gallbladder and preventing displacement or slippage of the drainage tube within the bile duct. Simultaneously, pressing down on the eccentric protrusion 22 of the movable arm 8 presses against the pull wire outlet 23 on the wall of the connecting tube 6, causing deformation of the thinner wall of the connecting tube 6 at the steeply inclined pull wire outlet 23. This deformation and closure of the pull wire outlet 23 effectively prevents leakage of drainage fluid.

[0029] The pull cord 3 of the biliary drainage tube starts from the control part 7 at the rear end of the tube body 1. The end of the pull cord 3 is pulled out of the cavity of the tube body 1 and put on the connector 4 together with the tube wall, so that the end of the pull cord 3 is between the outer wall of the connector 4 and the tube body 1. Then, the excess end of the pull cord 3 is folded back between the connector 4 and the tightening cap 5, and the tightening cap 5 is tightened to prevent the end of the pull cord 3 from slipping. The pull cord 3 is pulled out of the cavity along the tube lumen to the pull hole at the conical head of the tube body 1, and then enters the cavity through the pull hole at the front end of the bend section mark ring 13. It runs along the cavity to the connection part at the rear of the tube body 1, and then passes out through the pull hole 23 of the control part 7 on the wall of the connecting tube 6. Finally, it is wound around the winding shaft 9 to control the bend section at the front end of the tube body 1.

[0030] The method of using the biliary drainage tube of this utility model is as follows: 1. Based on the degree and location of the patient's biliary tract cancer, calculate the required number of particles and the filling location.

[0031] 2. Open the packaging and remove the biliary drainage tube carrying radioactive particle 15.

[0032] 3. In a sterile room with radiation protection, the particle chamber 27 of the biliary drainage tube containing radioactive particles 15 is filled according to the number of particles required by the patient's condition and the location of the lesion.

[0033] 4. Following the standard surgical placement procedure for bile duct drainage tubes, insert the biliary drainage tube already containing the particles. Using an instrument, position it at the designated location. Move the gear-shaped winding shaft 9 to bend the front end of the drainage tube 1, which extends into the gallbladder, into a ring shape. Press down the movable arm 8 to engage the teeth of the winding shaft 9 with the anti-slip teeth 18 on the connecting tube 6. The locking protrusions 19 on both sides of the movable arm 8 and the locking recesses 20 on the inner wall of the groove 16 are engaged to prevent the ring-shaped bending of the front end of the tube from loosening or deforming, which could cause the drainage tube to shift or slide.

[0034] 5. Use a fixing device to fix the tube 1 protruding from the body to the patient's skin surface, and connect the rear docking hole to the negative pressure syringe or drainage bag.

[0035] The beneficial effects of this utility model are as follows: 1. The combination of radioactive particles and drainage tubes not only solves the physical drainage problem of bile duct obstruction but also addresses the issue of particle fixation during radiotherapy for bile duct cancer. Doctors can precisely and flexibly control the radiation dose to treat the cancerous area based on the patient's specific location. The radioactive particles can be easily removed after treatment, which is beneficial for the patient's recovery.

[0036] 2. The combination of particles and drainage tubes can both clear and drain blocked bile ducts in patients and provide radiation therapy for cancerous bile ducts, making treatment more convenient, reducing the workload of doctors, and giving patients a better medical experience.

[0037] 3. The particle chamber 27 is located on the inner wall of the drainage tube, without changing the circular outline of the drainage tube, making the drainage from the tube to the affected area smoother and more unobstructed.

[0038] 4. The particle chamber 27 uses one particle per chamber, which avoids the problem of uneven radiation therapy caused by particle displacement or dislocation during the treatment process.

[0039] 5. The particle chamber 27 inlet is designed with an opening much smaller than the particle diameter, which effectively avoids unnecessary harm to the patient's body caused by particle displacement or loss during treatment.

[0040] 6. The control unit 7 adopts the winding shaft 9 method, which makes the doctor's operation smoother and more convenient. The doctor only needs to turn the winding shaft 9 to tighten or loosen the pull line 3, making it easier and more convenient to adjust the front end of the drainage tube.

[0041] 7. The point where the lower end of the movable arm 8 contacts the connecting tube 6 is the eccentric protrusion 22, which both presses the pull wire 3 to stabilize it and presses down on the pull wire outlet 23, causing the thinner wall of the connecting tube 6 at the pull wire outlet 23 with a larger inclination to deform and squeeze the pull wire outlet 23, causing the pull wire outlet 23 to deform and close, effectively preventing the overflow of drainage fluid.

[0042] 8. The outer periphery of the winding shaft 9 is gear-shaped, which increases the friction when the doctor moves the winding shaft 9, preventing slippage and making the operation easier. At the same time, the gear of the winding shaft 9 meshes with the anti-slip teeth 18 on the connecting tube 6, making the tension of the pull wire 3 more stable and preventing the annular bending, loosening and deformation of the front end of the tube body 1 from causing displacement and slippage of the drainage tube.

[0043] 9. The movable arm 8 has rounded protruding points on both sides of its upright wall, corresponding to the locking recesses 20 on the inner wall of the groove 16. This makes the movable arm 8 more stable after being pressed into the groove 16, and prevents it from opening due to accidental contact, which would cause the winding shaft 9 to rotate.

[0044] 10. A Mark ring 13 is set at the bend point of the drainage tube to facilitate the doctor's judgment based on the instrument to determine whether the entire bend of the drainage tube remains in the gallbladder.

[0045] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A biliary drainage tube carrying radioactive particles, characterized in that, include: Tube body, particle chamber structure, pull wire, connector, tightening cap, connecting tube, control unit, movable arm, winding shaft; The front end of the tube is bent into a pig tail shape; the tube is a single cavity that runs through the tube and serves as a drainage channel; several drainage holes are provided on the bent part of the front end of the tube; a developing ring and a first pull wire hole are provided on the bent front end of the tube; a marker ring and a second pull wire hole are provided on the tube at the junction of the bent front end and the tube. The tube body is provided with a particle chamber structure, which is loaded with radioactive particles; the rear end of the tube body is connected to the connector and the connecting tube in sequence; the connection between the tube body and the connector is provided with a tightening cap to tighten and seal the connection between the tube body and the connector; the connecting tube is fitted with the control part, which is provided with a groove; the movable arm is movably disposed in the groove; the movable arm is provided with a through groove; the winding shaft is movably disposed in the through groove; the connecting tube is provided with a wire pull hole and anti-slip teeth that mesh with the winding shaft. One end of the pull wire is fixed to the rear end of the tube body. After passing through the tube body forward, it passes out through the first pull wire hole and then through the second pull wire hole. After passing through the tube body and the connecting tube in sequence, it passes out through the pull wire outlet hole and is wound around the winding shaft.

2. The biliary drainage tube carrying radioactive particles according to claim 1, characterized in that, The movable arm has locking protrusions on both outer sides for locking, and locking recesses on the inner wall of the groove corresponding to the groove. A guide groove is provided on the inner wall of the groove above the locking recesses.

3. The biliary drainage tube carrying radioactive particles according to claim 1, characterized in that, The point where the lower end of the movable arm contacts the connecting tube is an eccentric protrusion, which is directly opposite the pull wire outlet hole.

4. The biliary drainage tube carrying radioactive particles according to claim 1, characterized in that, The control part is axially attached to the middle part of the connecting pipe. The control part is provided with a rectangular groove. The two long sides of the groove are raised in the middle in an arc shape, and the two short sides are flat.

5. The biliary drainage tube carrying radioactive particles according to claim 1, characterized in that, The winding shaft has raised gears on both sides and a recessed winding groove in the middle.

6. The biliary drainage tube carrying radioactive particles according to claim 5, characterized in that, Silicone sheets are attached to the inner walls on both sides of the winding groove.

7. The biliary drainage tube carrying radioactive particles according to claim 1, characterized in that, The movable arm has an arc-shaped extension at its head end, which serves as an operating handle.

8. The biliary drainage tube carrying radioactive particles according to claim 1, characterized in that, A Luer connector is connected to the end of the connecting pipe away from the coupling.

9. The biliary drainage tube carrying radioactive particles according to claim 1, characterized in that, The drainage hole is elliptical in shape along the radial direction of the tube.

10. The biliary drainage tube carrying radioactive particles according to claim 1, characterized in that, The particle chamber structure is composed of several particle chambers connected radially in sequence.

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