Lacrimal passage drainage tube

Abstract

The utility model relates to a lacrimal passage drainage tube which comprises a guide wire, a guide wire tube and a silicone tube, the guide wire tube is sleeved on the guide wire, one end of the guide wire is provided with an elbow integrated with the guide wire, the tail end of the elbow is provided with a water dropper, the other end of the guide wire is provided with a connector used for being connected with the silicone tube, and the front end of the connector is provided with an arch wire. The protruding direction of the arch wire is consistent with the bending direction of the elbow; the guide wire can be separated from the side wall of the guide wire tube; a longitudinal first groove is formed in the outer surface of the silicone tube along the tube wall; and the inner wall of the silicone tube at the joint of the silicone tube and the connector is occluded with the outer surface of the connector. According to the utility model, the guide wire can be separated from the side wall of the guide wire tube by arranging the longitudinal opening or the tearing line on the guide wire tube, so that the inner diameter of the guide wire tube can be set to be smaller, the shaking of the guide wire in the guide wire tube is reduced, and the comfort of a patient is improved; the silicone tube with the longitudinal groove in the outer surface is used as the drainage tube, and mucous membrane adhesion is reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of ophthalmic medical instruments, and particularly relates to a lacrimal duct drainage tube. Background Art

[0002] Tear duct obstruction is a common ophthalmic disease, which often occurs at the junction of the lacrimal puncta, lacrimal canaliculi, lacrimal sac or nasolacrimal duct. Tear duct obstruction will cause patients to shed tears for a long time, seriously affecting their daily life. At present, when treating ophthalmic diseases such as tear duct obstruction and dacryocystitis, different styles of tear duct inserters and drainage tubes, tear duct insertable devices, etc. are often used for surgery. During the operation, a silicone tube for supporting the tear duct needs to be inserted in the reverse direction along the nasolacrimal duct. The common structure of this type of medical device is currently recorded in the patent number CN201520794065.8, the publication number CN205054571U, and the patent name is a utility model of a new tear duct drainage tube. Although this drainage tube can complete the catheterization operation, it still has the following inconveniences:

[0003] 1. The guide wire tube can slide up and down on the guide wire to control the shape of the elbow at the front end of the guide wire, so that it can maintain a straight shape for easy guidance. However, it is inconvenient to remove the guide wire tube after the front end guidance is completed; if it is to be removed from the end of the guide wire, the inner diameter of the guide wire tube needs to be larger than the outer diameter of the silicone tube. If the inner diameter is too large, the guide wire is easy to shake during the operation of controlling the shape of the elbow. If the operation is not skilled enough, it is easy to cause discomfort to the patient. Therefore, the guide wire tube needs to be improved;

[0004] 2. The existing silicone tube used as a drainage tube has a smooth surface and is prone to large-area adhesion with the lacrimal duct mucosa, which is not conducive to the recovery of the lacrimal duct and the drainage of tears in the lacrimal duct. Therefore, the silicone tube also needs to be improved. Summary of the invention

[0005] The utility model provides a lacrimal duct drainage tube to solve the technical problems existing in the known technology, which is more convenient for doctors to use and improves the comfort of patients.

[0006] The utility model includes the following technical solutions: a lacrimal duct drainage tube, comprising a guide wire, a guide wire tube and a silicone tube, wherein the guide wire tube is sleeved on the guide wire, one end of the guide wire is provided with an elbow integrated therewith, the end of the elbow is provided with a water drop head, the other end of the guide wire is provided with a connector for connecting the silicone tube, the front end of the connector is provided with an arch wire, the protruding direction of the arch wire is consistent with the bending direction of the elbow; the guide wire can be detached from the side wall of the guide wire tube; the outer surface of the silicone tube is provided with a longitudinal first groove along the tube wall; the inner wall of the silicone tube at the junction of the silicone tube and the connector has a bite relationship with the outer surface of the connector.

[0007] Furthermore, the length of the water drop head is 1 mm and the outer diameter is 0.7 mm.

[0008] Furthermore, the total length of the guide wire and the elbow is 205 mm, and the outer diameter is 0.3 mm.

[0009] Furthermore, the outer diameter of the connector is larger than the diameter of the guide wire, and the front end of the connector is bullet-shaped and smooth, so it is convenient to enter into a small cavity and prevent scratching of tissues.

[0010] Furthermore, the outer diameter of the main body of the connector is 0.8 mm and the overall length is 5.5 mm.

[0011] Furthermore, a second longitudinal groove matching the convex ridges of the inner wall of the front end of the silicone tube is provided from the middle to the end of the outer wall of the connector, so as to ensure a firm connection between the two and prevent them from coming loose during the catheterization process.

[0012] Furthermore, the wire guide tube has a length of 100 mm, an outer diameter of 0.65 mm, and an inner diameter of 0.5 mm.

[0013] Furthermore, a longitudinal opening running through both ends of the guide wire tube is provided on the side wall of the guide wire tube, and the doctor can directly separate the guide wire from the guide wire tube through the opening.

[0014] Furthermore, a longitudinal opening is provided on the side wall of the guide wire tube from one end close to the arch wire to the middle of the guide wire tube, and a tear line is provided along the extension line of the longitudinal opening on the guide wire tube. After the doctor moves the guide wire tube toward the rear end of the guide wire for a distance, the lower half of the guide wire tube can be torn or cut along the tear line, thereby separating the guide wire from the guide wire tube.

[0015] Furthermore, a triangular tearing opening is provided on the side wall of the guide wire tube near one end of the arch wire, and a tearing line running through both ends of the guide wire tube is provided at the sharp corner of the tearing opening. After the doctor moves the guide wire tube toward the rear end of the guide wire for a distance, he can tear or cut the guide wire tube from the tearing opening along the tearing line as needed to separate the guide wire from the guide wire tube.

[0016] The utility model has the following advantages and positive effects:

[0017] 1. The utility model provides a longitudinal opening or tear line on the guide wire tube to enable the guide wire to escape from the side wall of the guide wire tube, so that the inner diameter of the guide wire tube can be set smaller, thereby reducing the shaking of the guide wire therein, thereby improving the comfort of the patient.

[0018] 2. The utility model adopts a silicone tube with longitudinal grooves on the outer surface as a drainage tube, which reduces the contact area between the silicone tube and the lacrimal duct mucosa, reduces mucosal adhesion, is beneficial to the recovery of the lacrimal duct and the drainage of tears in the lacrimal duct, thereby improving the patient's comfort.

[0019] 3. The utility model designs the connector to have an interlocking relationship with the inner wall of the silicone tube, ensuring that the connection between the two is sufficiently firm and will not come off during the catheterization process. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is a schematic diagram of the overall structure of Example 1;

[0021] Figure 2 is a schematic cross-sectional view of Example 1 taken along line AA;

[0022] Figure 3 is a schematic diagram of the overall structure of Example 3;

[0023] In the figure, 1-guide wire; 2-water drop head; 3-elbow; 4-wire guide tube; 401-tear opening; 402-tear line; 5-arch wire; 6-connector; 601-second groove; 7-silicone tube; 701-first groove. DETAILED DESCRIPTION

[0024] In order to further disclose the content, features and effects of the invention of the utility model, the following examples are specifically cited and described in detail in conjunction with the accompanying drawings. In the description of the following embodiments, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, which are only for the convenience of describing this patent and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this patent.

[0025] In the description of the following embodiments, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", and "set" should be understood in a broad sense, for example, it can be fixedly connected or set, or it can be detachably connected or set, or connected or set in one piece. For ordinary technicians in this field, the specific meanings of the above terms in this patent can be understood according to specific circumstances.

[0026] Example 1: See attached Figure 1-2A lacrimal drainage tube comprises a guide wire 1, a guide wire tube 4 and a silicone tube 7, wherein the guide wire tube 4 is sleeved on the guide wire 1, and an elbow 3 is provided at one end of the guide wire 1, and the total length of the guide wire 1 and the elbow 3 is 205 mm, and the outer diameter is 0.3 mm. A water drop head 2 is provided at the end of the elbow 3, and the length of the water drop head 2 is 1 mm, and the outer diameter is 0.7 mm. The length of the guide wire tube 4 is 100 mm, the outer diameter is 0.65 mm, and the inner diameter is 0.5 mm. The guide wire 1 can be detached from the side wall of the guide wire tube 4; a longitudinal opening running through both ends of the guide wire tube 4 is provided on the side wall of the guide wire tube 4, and the doctor can directly separate the guide wire 1 from the guide wire tube 4 from this opening.

[0027] The other end of the guide wire 1 is provided with a connector for connecting to the silicone tube 7. The main body outer diameter of the connector 6 is 0.8mm and the overall length is 5.5mm. The outer diameter of the connector 6 is larger than the diameter of the guide wire 1. The front end of the connector 6 is bullet-shaped and smooth, which is convenient for entering the small cavity and can prevent scratching the tissue. An arch wire 5 is provided at the front end of the connector 6. The protruding direction of the arch wire 5 is consistent with the bending direction of the elbow 3; the outer surface of the silicone tube 7 is provided with a longitudinal first groove 701 along the tube wall; the inner wall of the silicone tube 7 at the junction of the silicone tube 7 and the connector 6 has an occlusal relationship with the outer surface of the connector 6. A longitudinal second groove 601 matching the convex ridges of the inner wall of the front end of the silicone tube 7 is provided from the middle to the end of the outer wall of the connector 6 to ensure that the connection between the two is sufficiently stable and will not be disengaged during the catheterization process.

[0028] Example 2: See attached Figure 1-2 The side wall of the guide wire tube 4 is provided with a longitudinal opening from one end close to the arch wire 5 to the middle of the guide wire tube 4, and a tearing line is provided along the extension line of the longitudinal opening on the guide wire tube 4. After the doctor moves the guide wire tube 4 toward the rear end of the guide wire 1 for a distance, the lower half of the guide wire tube 4 can be torn or cut along the tearing line, thereby separating the guide wire 1 from the guide wire tube 4. The other structures are basically the same as those in Example 1.

[0029] Example 3: See attached Figure 2-3 A triangular tearing opening 401 is provided on the side wall of the guide wire tube 4 near one end of the arch wire 5, and a tearing line 402 running through both ends of the guide wire tube 4 is provided at the sharp corner of the tearing opening 401. After the doctor moves the guide wire tube 4 toward the rear end of the guide wire 1 for a distance, the guide wire tube 4 can be torn or cut from the tearing opening along the tearing line 402 to separate the guide wire 1 from the guide wire tube 4. The other structures are basically the same as those in Example 1.

[0030] Working principle: by setting a longitudinal opening or tearing line on the guide wire tube 4, the guide wire 1 can be released from the side wall of the guide wire tube 4, so that the inner diameter of the guide wire tube 4 can be set smaller, thereby reducing the shaking of the guide wire 1 therein, thereby improving the patient's comfort; a silicone tube 7 with a longitudinal first groove 701 on the outer surface is used as a drainage tube, which reduces the contact area between the silicone tube 7 and the lacrimal duct mucosa, reduces mucosal adhesion, is beneficial to the recovery of the lacrimal duct and the drainage of tears in the lacrimal duct, thereby improving the patient's comfort.

[0031] Although the preferred embodiments of the utility model are described above, the utility model is not limited to the above specific embodiments, which are merely illustrative and not restrictive. Under the enlightenment of the utility model, ordinary technicians in this field can make many forms without departing from the purpose of the utility model and the scope of protection of the claims. All of these belong to the protection scope of the utility model.

Claims

1. A lacrimal duct drainage tube, comprising a guide wire, a guide wire tube and a silicone tube, wherein the guide wire tube is sleeved on the guide wire, one end of the guide wire is provided with an elbow integral with the guide wire, the end of the elbow is provided with a water drop head, the other end of the guide wire is provided with a connector for connecting the silicone tube, the front end of the connector is provided with an arch wire, the protruding direction of the arch wire is consistent with the bending direction of the elbow, and the characteristics are: The guide wire can be released from the side wall of the guide wire tube; the outer surface of the silicone tube is provided with a longitudinal first groove along the tube wall; the inner wall of the silicone tube where the silicone tube and the connector meet is in an occlusal relationship with the outer surface of the connector.

2. The lacrimal duct drainage tube according to claim 1, characterized in that: The length of the water drop head is 1 mm and the outer diameter is 0.7 mm.

3. The lacrimal duct drainage tube according to claim 1, characterized in that: The total length of the guide wire and the elbow is 205 mm, and the outer diameter is 0.3 mm.

4. The lacrimal duct drainage tube according to claim 3, characterized in that: The outer diameter of the connector is greater than the diameter of the guide wire, and the front end of the connector is bullet-shaped and smooth.

5. The lacrimal duct drainage tube according to claim 4, characterized in that: The outer diameter of the main body of the connector is 0.8 mm, and the overall length is 5.5 mm.

6. The lacrimal duct drainage tube according to claim 5, characterized in that: A second longitudinal groove matching the convex ridges of the inner wall of the front end of the silicone tube is provided from the middle to the end of the outer wall of the connector.

7. A lacrimal duct drainage tube according to any one of claims 1 to 6, characterized in that: The wire guide tube has a length of 100 mm, an outer diameter of 0.65 mm, and an inner diameter of 0.5 mm.

8. The lacrimal duct drainage tube according to claim 7, characterized in that: The side wall of the wire guide tube is provided with a longitudinal opening running through both ends thereof.

9. The lacrimal duct drainage tube according to claim 7, characterized in that: The side wall of the wire guide tube is provided with a longitudinal opening extending from one end close to the arch wire to the middle of the wire guide tube, and a tearing line is arranged along the extension line of the longitudinal opening on the wire guide tube.

10. The lacrimal duct drainage tube according to claim 7, characterized in that: A triangular tearing opening is arranged on the side wall of the wire guide tube near one end of the arch wire, and a tearing line running through the two ends of the wire guide tube is arranged at the sharp corner of the tearing opening.

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