Novel double-layer combined lacrimal passage drainage tube

Abstract

The utility model relates to the field of lacrimal passage drainage tubes, in particular to a novel double-layer combined lacrimal passage drainage tube which comprises a lacrimal passage outer tube and a lacrimal passage inner tube, one end of the lacrimal passage inner tube is provided with a drainage incision extending to the outer side wall, an assembling channel is arranged in the front end of the lacrimal passage outer tube, a plurality of drainage holes are formed in the outer side wall of the assembling channel, and a plurality of drainage holes are formed in the outer side wall of the assembling channel. The lacrimal passage inner tube is arranged in the assembling channel and expands under the elastic action of the lacrimal passage inner tube, so that the corresponding outer side face of the lacrimal passage outer tube deforms to the clamping structure, and the corresponding drainage hole is communicated with the drainage incision. Due to the clamping structure, the problem that due to the fact that a traditional drainage tube is not matched in shape, tissue is excessively expanded or supported insufficiently is solved. In addition, the drainage hole is communicated with the drainage incision, an effective drainage channel is formed, tear, snot and nasal cavity excrement can be discharged conveniently, and the risks of hydrops and inflammation infection are reduced.

Description

Technical Field

[0001] This utility model relates to the field of lacrimal duct drainage tubes, and more particularly to a novel double-layer combined lacrimal duct drainage tube. Background Technology

[0002] When nasolacrimal duct reconstruction surgery is needed, doctors will cut a silicone tube of appropriate length according to the actual length of the patient's lacrimal duct and implant it into the nasolacrimal duct. After the nasolacrimal duct has successfully regenerated, the silicone tube is removed. The upper part of the human lacrimal duct is actually club-shaped, wider at the top and narrower at the bottom. This type of lacrimal duct tube is completely incompatible with the human body structure. After implantation, some tissues (the top and lower part of the lacrimal duct) are excessively stretched, while other tissues lack support, leading to the growth of fibrosis and failing to achieve the desired implantation effect. Furthermore, if the lacrimal duct tube is the same size from top to bottom and lacks a hanging position, the tube is prone to spontaneous detachment, resulting in support failure. The duct also lacks dedicated drainage holes for tears, nasal mucus, and nasal excretions, causing fluid accumulation, leading to effusion and inflammatory infection. Summary of the Invention

[0003] To address the aforementioned problems, this invention provides a novel double-layered combined lacrimal duct drainage tube. The inner lacrimal duct tube is placed within the fitting channel of the outer lacrimal duct tube. Through the elastic expansion of the inner lacrimal duct tube, the corresponding outer surface of the outer lacrimal duct tube deforms into a locking structure, avoiding the problems of excessive tissue stretching or insufficient support caused by shape mismatch in traditional drainage tubes. Simultaneously, the outer wall of the fitting channel of the outer lacrimal duct tube is provided with several drainage holes, while the outer wall of the inner lacrimal duct tube has a drainage incision. The drainage holes and drainage incision are connected, forming an effective drainage channel that facilitates the drainage of tears, nasal mucus, and nasal secretions, reducing the risk of fluid accumulation and inflammatory infection.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows: a novel double-layer combined lacrimal duct drainage tube, including an outer lacrimal duct tube and an inner lacrimal duct tube. One end of the inner lacrimal duct tube is provided with a drainage incision extending to the outer side wall. The front end of the outer lacrimal duct tube is provided with a fitting channel, and the outer side wall of the fitting channel is provided with several drainage holes. The inner lacrimal duct tube is built into the fitting channel. Under its own elasticity, the inner lacrimal duct tube expands, causing the corresponding outer side of the outer lacrimal duct tube to deform into a locking structure, and the corresponding drainage holes are connected to the drainage incision.

[0005] Furthermore, the locking structure is a club-shaped structure.

[0006] Furthermore, a drainage channel is provided at the end of the lacrimal duct external tube, wherein the wall thickness of the drainage channel is greater than that of the fitting channel, and a limiting step is provided at the junction of the drainage channel and the fitting channel.

[0007] Furthermore, drainage holes are arranged around the outer wall of the lacrimal duct tube, and the number of drainage holes is the same as the number of drainage incisions.

[0008] Furthermore, the drainage incision has a V-shaped structure, and the width of the drainage incision increases towards the direction of the limiting step.

[0009] Furthermore, the diameter of the drainage hole is 2mm.

[0010] Furthermore, the lacrimal duct inner tube is 12mm long, and has an inner diameter of 4mm and a wall thickness of 1mm.

[0011] Furthermore, the length of the mounting channel is 25mm, the inner diameter of the mounting channel is 5mm, and the outer diameter of the mounting channel is 6mm.

[0012] The beneficial effects of this utility model are as follows:

[0013] Because the inner lacrimal duct tube is placed within the fitting channel of the outer lacrimal duct tube, the elastic expansion of the inner tube causes the corresponding outer surface of the outer tube to deform into a locking structure. This design ensures a tight fit between the drainage tube and the lacrimal duct, preventing it from easily falling off. The locking structure is club-shaped, conforming to the actual shape of the human lacrimal duct, avoiding the problems of excessive tissue stretching or insufficient support caused by the shape mismatch of traditional drainage tubes.

[0014] Meanwhile, the outer wall of the lacrimal duct tube has several drainage holes, while the outer wall of the inner lacrimal duct tube has a drainage incision. When the inner lacrimal duct tube expands, the drainage holes connect with the drainage incision, forming an effective drainage channel, which facilitates the drainage of tears, nasal mucus, and nasal secretions, reducing the risk of fluid accumulation and inflammatory infection. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the cross-sectional structure of the external lacrimal duct canal.

[0016] Figure 2 This is a schematic diagram of the cross-sectional structure of the lacrimal duct canal.

[0017] Figure 3 These are the front and top views of the lacrimal duct canal.

[0018] Figure 4 This is a cross-sectional view of the inner lacrimal duct tube being assembled inside the outer lacrimal duct tube.

[0019] The following are the reference numerals: 1. Lacrimal duct external tube; 11. Fitting channel; 111. Drainage hole; 12. Drainage channel; 13. Limiting step; 2. Lacrimal duct internal tube; 21. Drainage incision. Detailed Implementation

[0020] Please see Figure 1-4As shown, this utility model relates to a novel double-layer combined lacrimal drainage tube, including an outer lacrimal tube 1 and an inner lacrimal tube 2. One end of the inner lacrimal tube 2 is provided with a drainage incision 21 extending to the outer side wall. The front end of the outer lacrimal tube 1 is provided with a fitting channel 11, and the outer side wall of the fitting channel 11 is provided with a plurality of drainage holes 111. The inner lacrimal tube 2 is built into the fitting channel 11. Under its own elasticity, the inner lacrimal tube 2 expands, causing the corresponding outer side of the outer lacrimal tube 1 to deform into a locking structure, and the corresponding drainage holes 111 are connected to the drainage incision 21.

[0021] Because the inner lacrimal tube 2 is placed within the fitting channel 11 of the outer lacrimal tube 1, the elastic expansion of the inner lacrimal tube 2 causes the corresponding outer surface of the outer lacrimal tube 1 to deform into a locking structure. This design ensures a tight fit between the drainage tube and the lacrimal duct, preventing it from easily falling off. The locking structure is club-shaped, conforming to the actual shape of the human lacrimal duct, avoiding the problems of excessive tissue stretching or insufficient support caused by the shape mismatch of traditional drainage tubes.

[0022] Meanwhile, the outer wall of the fitting channel 11 of the lacrimal duct external tube 1 is provided with several drainage holes 111, while the outer wall of the lacrimal duct internal tube 2 is provided with a drainage incision 21. When the lacrimal duct internal tube 2 expands, the drainage holes 111 and the drainage incision 21 are connected to form an effective drainage channel 12, which facilitates the drainage of tears, nasal mucus and nasal secretions, and reduces the risk of fluid accumulation and inflammatory infection.

[0023] Further discussion reveals that the lacrimal duct tube 1 is also provided with a drainage channel 12 at its tail end, wherein the wall thickness of the drainage channel 12 is greater than the wall thickness of the fitting channel 11, and a limiting step 13 is provided at the junction of the drainage channel 12 and the fitting channel 11.

[0024] The limiting step 13 is designed primarily to fix and limit the lacrimal duct tube 2. After the lacrimal duct tube 2 is inserted into the fitting channel 11 of the lacrimal duct tube 1, its elasticity causes it to expand, deforming the corresponding outer surface of the lacrimal duct tube 1 into the locking structure. At this time, the limiting step 13 acts as a "baffle," preventing the lacrimal duct tube 2 from going too deep or falling out of the fitting channel 11, ensuring the stability and reliability of the drainage tube structure. Moreover, during the operation, the surgeon can accurately determine whether the lacrimal duct tube 2 has been correctly placed into the fitting channel 11 and whether adjustments are needed by observing the position of the limiting step 13. This greatly improves the precision and operability of the surgery and reduces the surgical risks caused by improper operation.

[0025] Further discussion reveals that drainage holes 111 are arranged around the outer wall of the lacrimal duct external tube 1, and the number of drainage holes 111 is the same as the number of drainage incisions 21. The equal number of drainage holes 111 and drainage incisions 21 ensures that each drainage incision 21 can connect to at least one drainage hole 111. This allows secretions such as tears and nasal discharge to quickly drain out of the drainage tube through the connected drainage holes 111 when they enter the drainage tube through the drainage incisions 21, thereby improving overall drainage efficiency. The surrounding drainage holes 111 make the distribution of the drainage tube within the lacrimal duct more uniform, ensuring that secretions, regardless of their location within the lacrimal duct, can be drained through the nearest drainage hole 111 and drainage incision 21. This design optimizes the drainage path, reduces the retention time of secretions within the drainage tube, and lowers the risk of infection and inflammation. Because the shape and size of the lacrimal duct vary from person to person, the drainage tube needs to be adaptable. The design that the number of drainage holes 111 and drainage incisions 21 is the same allows the drainage tube to be finely adjusted according to the patient's specific situation. For example, by adjusting the size, shape, and position of the drainage holes 111 and drainage incisions 21, the drainage tube can be better adapted to the lacrimal duct shape and size of different patients, improving the applicability and comfort of the drainage tube.

[0026] Further discussion reveals that the drainage incision 21 has a V-shaped structure, and the width of the drainage incision 21 increases in the direction of the limiting step 13.

[0027] The V-shaped drainage incision 21 is designed so that the incision area gradually increases in the direction close to the limiting step 13, which helps to collect and guide more secretions such as tears and nasal mucus into the drainage tube. Due to the increasing width of the incision, the resistance encountered by the secretions during flow gradually decreases, thereby improving drainage efficiency.

[0028] The V-shaped structure allows the drainage incision 21 to better conform to the curve of the lacrimal duct wall, reducing the accumulation and retention of secretions at the inlet of the drainage tube. At the same time, due to the increasing width of the incision, secretions can more smoothly transition to the drainage hole 111 during flow, avoiding blockage problems caused by an excessively narrow incision.

[0029] Furthermore, the diameter of the drainage hole 111 is 2mm.

[0030] Furthermore, the lacrimal duct inner tube 2 has a length of 12mm, and an inner diameter of 4mm and a wall thickness of 1mm.

[0031] Furthermore, the mounting channel 11 has a length of 25mm, an inner diameter of 5mm, and an outer diameter of 6mm.

[0032] In this specific embodiment, the drainage hole 111 is designed with a diameter of 2mm. This size ensures sufficient drainage area while avoiding tissue damage or poor drainage caused by excessive size. The 2mm diameter allows the drainage hole 111 to effectively collect and guide secretions such as tears and nasal discharge into the drainage tube, while reducing the stimulation and pressure of the drainage tube on the lacrimal duct tissue, thus improving patient comfort.

[0033] The lacrimal duct tube 2 is 12mm long, 4mm in inner diameter, and 1mm thick. This size design allows the lacrimal duct tube 2 to fully expand the lacrimal duct while maintaining sufficient strength and stability. The 12mm length ensures that the drainage tube can cover the key parts of the lacrimal duct, providing effective drainage support. The 4mm inner diameter and 1mm wall thickness ensure the patency and durability of the drainage tube, reducing the risk of surgical failure due to blockage or damage. The fitting channel 11 is 25mm long, 5mm in inner diameter, and 6mm in outer diameter. This size design allows the fitting channel 11 to tightly wrap around the lacrimal duct tube 2, providing sufficient support and fixation. The 25mm length ensures that the fitting channel 11 can completely cover the lacrimal duct tube 2, providing a stable drainage environment. The 5mm inner diameter and 6mm outer diameter ensure that the gap between the fitting channel 11 and the lacrimal duct tube 2 is moderate, neither too tight to cause damage nor too loose to cause dislodgement.

[0034] To elaborate further, the lacrimal duct inner tube 2 is actually formed by cutting off the tail of the lacrimal duct outer tube 1, and then cutting out the cut portion to form the lacrimal duct inner tube. Then, the corresponding drainage incision 21 is cut on the outer side of the lacrimal duct inner tube.

[0035] 1. Preliminary preparation of the lacrimal duct external tube 1: In the manufacturing process, a lacrimal duct external tube 1 with appropriate length and size is first prepared. This external tube is made of medical-grade silicone rubber or other biocompatible materials to ensure its safety and stability in the human body.

[0036] 2. Tail Cutting and Inner Tube Formation: Next, according to the pre-set design requirements, the tail of the lacrimal duct outer tube 1 is cut. This cutting process not only determines the length of the lacrimal duct inner tube 2, but also ensures a tight fit and coordinated operation between the inner and outer tubes. Through cutting, the tail material, originally part of the lacrimal duct outer tube 1, is transformed into the lacrimal duct inner tube 2. This transformation process not only simplifies the manufacturing process but also improves the overall performance and reliability of the product.

[0037] 3. Cutting of drainage incisions 21: After the lacrimal duct inner tube 2 is formed, corresponding drainage incisions 21 are cut on its outer surface. These incisions are designed with a V-shaped structure, and the width increases in the direction close to the limiting step 13 to optimize drainage effect and adaptability. The cutting of drainage incisions 21 requires extremely high precision and accuracy to ensure that they can be precisely aligned with the drainage holes 111 on the lacrimal duct outer tube 1 and form a good communication channel.

[0038] 4. Overall Assembly and Inspection: Finally, the cut and processed lacrimal duct inner tube 2 is reinserted into the fitting channel 11 of the lacrimal duct outer tube 1, and expands due to its own elasticity, causing the corresponding outer surface of the lacrimal duct outer tube 1 to deform into the locking structure. During this process, the drainage incision 21 and the drainage hole 111 are tightly connected, forming an efficient drainage system. After assembly, the drainage tube undergoes rigorous inspection and testing to ensure its performance meets design requirements and can work safely and effectively in the human body. In summary, by cutting the tail of the lacrimal duct outer tube 1 to form the lacrimal duct inner tube 2 and cutting the corresponding drainage incision 21 on its outer surface, this manufacturing process not only simplifies the production process but also improves the overall performance and reliability of the product. This innovative design gives the drainage tube higher application value and wider application prospects in nasolacrimal duct reconstruction surgery.

[0039] Overall, the solution has the following advantages:

[0040] This lacrimal duct drainage tube employs a double-layer design, comprising an outer lacrimal duct tube 1 and an inner lacrimal duct tube 2. These two components work together to achieve highly efficient drainage. One end of the inner lacrimal duct tube 2 has a drainage incision 21 extending to the outer wall, connecting with the drainage hole 111 on the outer lacrimal duct tube 1, forming a unique drainage system. The inner lacrimal duct tube 2 is obtained by cutting off the tail of the outer lacrimal duct tube 1, a manufacturing process that simplifies production and reduces costs. Furthermore, the tube's structure is relatively simple, making it easy to manufacture and process. The downward-cut V-shaped opening of the inner lacrimal duct tube 2 can naturally expand, expanding the shape of the outer lacrimal duct tube 1 and further preventing dislodgement. The V-shaped design also causes the drainage incision 21 to increase in width near the limiting step 13, optimizing the drainage effect.

[0041] Efficient drainage system: Lacrimal duct fluid and waste fluid can be drained promptly through the drainage hole 111 of the external lacrimal duct tube 1 and the drainage incision 21 of the internal lacrimal duct tube 2, preventing fluid accumulation. This design can effectively collect and guide secretions such as tears and nasal discharge into the drainage tube, reducing the risk of infection and inflammation.

[0042] Adjustable expansion degree: The expansion degree of the external lacrimal tube 1 can be adjusted by changing the shape, depth, and width of the V-shaped incision of the internal lacrimal tube 2. This design allows the drainage tube to adapt to the shape and size of the lacrimal duct in different patients, improving its versatility and applicability.

[0043] It conforms to the shape of the human lacrimal duct: the positioning structure is club-shaped, which is adapted to the actual shape of the human lacrimal duct, avoiding the problem of excessive tissue stretching or insufficient support caused by the mismatch in shape of traditional drainage tubes.

[0044] Reduced risk of infection: The design of the drainage incision 21 and drainage hole 111 effectively drains tears, fluid, and water from the nasolacrimal duct, reducing the occurrence of infection and inflammation. At the same time, the use of medical-grade materials ensures the safety and stability of the drainage tube within the body.

[0045] The extended tail section facilitates adjustment: the tail of the lacrimal duct cannula 1 has sufficient length to be cut to suit different specific needs. This design allows the entire cannula to adapt to nasolacrimal ducts of varying lengths, enhancing its flexibility and practicality.

[0046] The above embodiments are merely preferred embodiments of the present utility model and are not intended to limit the scope of the present utility model. Various modifications and improvements made to the technical solutions of the present utility model by those skilled in the art without departing from the spirit of the present utility model should fall within the protection scope defined by the claims of the present utility model.

Claims

1. A novel double-layer combined lacrimal duct drainage tube, characterized in that: The system includes an external lacrimal duct tube and an internal lacrimal duct tube. One end of the internal lacrimal duct tube has a drainage incision extending to the outer wall. The front end of the external lacrimal duct tube has a fitting channel, and the outer wall of the fitting channel has several drainage holes. The internal lacrimal duct tube is installed inside the fitting channel. The internal lacrimal duct tube expands under its own elasticity, causing the corresponding outer surface of the external lacrimal duct tube to deform into a locking structure, and the corresponding drainage holes are connected to the drainage incision.

2. The novel double-layer combined lacrimal duct drainage tube according to claim 1, characterized in that: The locking structure is a club-shaped structure.

3. The novel double-layer combined lacrimal duct drainage tube according to claim 1, characterized in that: The lacrimal duct tube is also equipped with a drainage channel at its tail end. The wall thickness of the drainage channel is greater than that of the fitting channel, and a limiting step is provided at the junction of the drainage channel and the fitting channel.

4. A novel double-layer combined lacrimal duct drainage tube according to claim 3, characterized in that: The drainage holes are arranged around the outer wall of the lacrimal duct canal, and the number of drainage holes is the same as the number of drainage incisions.

5. A novel double-layer combined lacrimal duct drainage tube according to claim 4, characterized in that: The drainage incision has a V-shaped structure, and the width of the drainage incision increases towards the limiting step.

6. A novel double-layer combined lacrimal duct drainage tube according to claim 5, characterized in that: The diameter of the drainage hole is 2mm.

7. A novel double-layer combined lacrimal duct drainage tube according to claim 6, characterized in that: The lacrimal duct inner tube is 12mm long, with an inner diameter of 4mm and a wall thickness of 1mm.

8. A novel double-layer combined lacrimal duct drainage tube according to claim 7, characterized in that: The length of the fitting channel is 25mm, the inner diameter of the fitting channel is 5mm, and the outer diameter of the fitting channel is 6mm.

Images