Lacrimal passage dredging and drainage device

Abstract

The utility model relates to the technical field of medical supplies, in particular to a lacrimal passage dredging and drainage device which comprises a dredging assembly and a drainage assembly, and the dredging assembly comprises a needle seat, a probe outer tube and a probe head which are of an integrated structure; the drainage assembly comprises a drainage tube, two guide wires connected to the two ends of the drainage tube and ball heads connected to the ends of the guide wires. The interior of the probe outer tube is hollow and can allow the ball head to slide, a ball inlet allowing the ball head to enter is formed in the end, close to the probe seat, of the probe outer tube, a sliding groove allowing the guide wire to slide is formed in the side wall of the probe outer tube in the length direction of the probe outer tube, and the end of the probe head is a cambered surface. The end face of the probe head is provided with a ball outlet allowing the ball head to penetrate out, the two ends of the sliding groove are communicated with the ball inlet and the ball outlet respectively, and the effect of improving the accuracy when the guide wire is inserted into the lacrimal passage is achieved.

Description

Technical Field

[0001] This application relates to the technical field of medical products, and in particular to a lacrimal duct unblocking and drainage device. Background Technology

[0002] Lacrimal duct obstruction is a common ophthalmological condition, with main symptoms including persistent tearing and purulent discharge. Acute attacks can even cause redness, swelling, and pain. Currently, lacrimal drainage tubes are widely used in the treatment of lacrimal duct stenosis or obstruction. By inserting a drainage tube into the lacrimal duct, effective drainage of tears is achieved, thereby relieving the patient's discomfort.

[0003] In related technologies, the following methods are commonly used to solve the problem of lacrimal duct obstruction: First, a lacrimal duct probe is used for preliminary unblocking. The probe attempts to open the obstructed lacrimal duct through physical action. Some probes are connected to a syringe, and the inside of the probe is a hollow, water-filled structure. After the probe unblocks the lacrimal duct, liquid can be injected into the lacrimal duct through the probe to confirm whether the lacrimal duct is open and the accuracy of the insertion position. Next, the probe is removed, and the lacrimal drainage tube is manually inserted into the lacrimal duct. Specifically, two guide wires are inserted from the upper lacrimal punctum and the lower lacrimal punctum respectively, driving the drainage tube into the lacrimal duct and leaving it there.

[0004] These methods have solved the problem of lacrimal duct obstruction to some extent, but the operation process is relatively complex. Moreover, during the placement of the lacrimal drainage tube, due to the complex structure of the lacrimal duct and the thinness and flexibility of the guide wire, it is difficult to accurately locate the lacrimal duct entrance, leading to placement failure or prolonged operation time, increasing patient suffering and surgical risks. Utility Model Content

[0005] To improve the accuracy of guide wire insertion into the lacrimal duct, this application provides a lacrimal duct unblocking and drainage device.

[0006] This application provides a lacrimal duct unblocking and drainage device, which adopts the following technical solution:

[0007] A lacrimal duct unblocking and drainage device includes an unblocking component and a drainage component. The unblocking component includes an integrally structured needle seat, probe outer tube, and probe head. The drainage component includes a drainage tube, two guide wires connected to both ends of the drainage tube, and a ball head connected to the end of the guide wires. The probe outer tube is hollow and allows the ball head to slide. An inlet is provided at one end of the probe outer tube near the needle seat for the ball head to enter. A groove is provided on the side wall of the probe outer tube along its length for the guide wires to slide. The end of the probe head is arc-shaped, and an outlet is provided on the end face of the probe head for the ball head to pass through. The two ends of the groove are respectively connected to the inlet and the outlet.

[0008] By adopting the above technical solutions, the unblocking component and the drainage component work together to achieve the functions of unblocking and draining the lacrimal duct. The integrated structure design of the needle seat, probe outer tube, and probe head in the unblocking component improves the overall stability and strength of the device; the hollow interior of the probe outer tube with a sliding groove allows the ball head and guide wire to slide within it, thereby enabling the ball head to enter from the inlet and exit through the outlet, effectively ensuring the accuracy and smoothness of lacrimal duct unblocking; the hemispherical probe head design reduces irritation and damage to the lacrimal duct, improving the safety and comfort of use.

[0009] Optionally, a guide ring is provided on the outer wall of the probe tube away from the probe head. The guide ring is located on the same side as the ball inlet and the guide ring is located on the side of the ball inlet closer to the needle seat. The ball head can pass through the guide ring.

[0010] By adopting the above technical solution, the guide ring and the ball inlet are located on the same side and close to the needle seat. When the ball head enters the probe outer tube, the guide wire will continuously pass through the guide ring, allowing the guide wire to slide forward along the probe outer tube and improving the smoothness of the guide wire movement.

[0011] Optionally, the guide ring is composed of a first half-ring and a second half-ring disposed on the side wall of the probe outer tube. The end of the first half-ring is provided with a snap-fit ​​part along its own axial direction, and the end of the second half-ring is provided with a snap-fit ​​groove for the snap-fit ​​part to be press-fitted.

[0012] By adopting the above technical solution, the guide ring is composed of a first half-ring and a second half-ring, and is fixed by interference fit, so that the guide ring can be opened flexibly. After the probe outer tube completes the guidance wire insertion, the guide ring can be opened easily to allow the guide wire to come out of the guide ring.

[0013] Optionally, the guide wire has a protrusion at one end near the drainage tube and a bend at one end near the ball head. The ball head is connected to the bend, and the protrusion direction of the protrusion is the same as the bend direction of the bend.

[0014] By adopting the above technical solution, a protrusion and a bend are respectively provided at both ends of the guide wire, and the protrusion and the bend are in the same direction. This helps to grasp the position of the bend of the guide wire through the protrusion, and facilitates control of the forward direction of the guide wire.

[0015] Optionally, it also includes an infusion assembly and a connector. The infusion assembly includes an integrally structured needle plug, connector, and probe inner tube. The connector and the needle hub are detachably connected via the connector. The probe inner tube is slidably inserted into the probe outer tube. A first water outlet is provided on the side wall of the probe inner tube, and a corresponding second water outlet is provided on the side wall of the probe outer tube. Liquid in the probe inner tube can pass through the first water outlet and the second water outlet in sequence.

[0016] By adopting the above technical solution, the lacrimal duct unblocking and drainage device adds infusion function. The inner probe tube slides into the outer probe tube, and the first water outlet on the side wall of the inner probe tube corresponds to the second water outlet on the side wall of the outer probe tube, allowing the liquid in the inner probe tube to drain smoothly, achieving the effect of drug infusion while unblocking and draining. The connecting seat and needle seat are detachably connected by a connector, facilitating the assembly and disassembly of the device and improving ease of use.

[0017] Optionally, the connector includes a connecting rod, one end of which is provided with an external thread. The connecting seat is inserted into the needle seat, the needle seat has an opening for the connecting rod to pass through, and the connecting seat has a threaded groove for the connecting rod to be threadedly connected.

[0018] By adopting the above technical solution, the connector and the needle seat are detachably connected through a connector, wherein the external thread at one end of the connecting rod matches the threaded groove on the connector, so that the connecting rod can firmly fix the connector and the needle seat.

[0019] Optionally, the connector may further include a handle connected to the end of the connecting rod.

[0020] By adopting the above technical solution, the connecting parts of the lacrimal duct unblocking and drainage device have been fitted with a handle, which makes it easier and more stable for users to operate the connecting rod, thus improving the ease of use of the device.

[0021] Optionally, a positioning block is provided on the outer wall of the connecting seat, and a positioning groove is provided on the inner wall of the needle seat for the positioning block to be inserted into, the positioning groove extending upward to the upper surface of the needle seat.

[0022] By adopting the above technical solution, the assembly accuracy between the connector and the needle holder is significantly improved; the design of the positioning groove extending upward to the upper surface of the needle holder facilitates intuitive alignment and insertion by the operator, improving the ease of device assembly.

[0023] In summary, this application includes at least one of the following beneficial effects:

[0024] 1. By combining the unblocking component and the drainage component, the guide wire is guided by the probe tube, which can accurately control the forward position and direction of the guide wire, avoid misalignment of the guide wire, effectively avoid damage to the lacrimal duct tissue, and improve operation efficiency.

[0025] 2. The detachable design of the unblocking and drainage components not only improves the unblocking effect but also does not affect the use of the drainage components. Attached Figure Description

[0026] Figure 1 This is a structural schematic diagram of an embodiment of this application;

[0027] Figure 2 This is a structural diagram of the unblocking component;

[0028] Figure 3 This is a schematic diagram of the guide ring structure;

[0029] Figure 4 This is a schematic diagram of the exploded structure of the infusion assembly.

[0030] Explanation of reference numerals in the attached drawings: 1. Unblocking component; 11. Needle seat; 111. Positioning groove; 12. Probe outer tube; 121. Ball inlet; 122. Ball outlet; 123. Slide groove; 124. Second water outlet; 13. Probe head; 2. Drainage component; 21. Drainage tube; 22. Guide wire; 221. Protrusion; 222. Bending part; 23. Ball head; 3. Guide ring; 31. First half ring; 311. Snap-fit ​​part; 32. Second half ring; 321. Snap-fit ​​groove; 4. Infusion component; 41. Needle plug; 42. Connecting seat; 421. Positioning block; 43. Probe inner tube; 431. First water outlet; 5. Connector; 51. Connecting rod; 52. Handle. Detailed Implementation

[0031] The following is in conjunction with the appendix Figure 1-4 This application will be described in further detail.

[0032] Example 1:

[0033] This application discloses a lacrimal duct unblocking and drainage device. (Refer to...) Figure 1 The lacrimal duct unblocking and drainage device includes an unblocking component 1 and a drainage component 2. The unblocking component 1 includes an integrally structured needle seat 11, a probe outer tube 12, and a probe head 13. The drainage component 2 includes a drainage tube 21, two guide wires 22 connected to both ends of the drainage tube 21, and a ball head 23 connected to the end of the guide wire 22.

[0034] Reference Figure 1 and Figure 2In this embodiment, the probe outer tube 12 can be made of stainless steel, which has high strength and corrosion resistance. Its outer diameter can be selected in various specifications according to actual needs, such as 1.2mm, 1.5mm or 1.8mm, to adapt to the lacrimal duct size of different patients. The cross-section of the probe outer tube 12 is preferably circular or elliptical to reduce frictional damage to the lacrimal duct tissue; the probe head 13 adopts an arc surface design, with a smooth surface and polished edges, which can effectively avoid scratching the inner wall of the lacrimal duct.

[0035] Reference Figure 1 and Figure 2 In this embodiment, the drainage tube 21 is a medical silicone tube, and the guide wire 22 can be made of shape memory alloy material, such as nickel-titanium alloy, which has good flexibility and shape memory characteristics. The outer diameter of the ball head 23 is larger than the diameter of the guide wire 22. During operation, the two ends of the drainage tube 21 are inserted into the superior and inferior lacrimal canaliculi of the lacrimal duct through the two guide wires 22, thereby pulling the drainage tube 21 into place. The probe outer tube 12 is hollow inside and has an internal space that allows the ball head 23 to slide up and down. The end of the probe outer tube 12 near the needle seat 11 has an inlet 121 for the ball head 23 to enter. The side wall of the probe outer tube 12 has a groove 123 along its length for the guide wire 22 to slide. The end face of the probe head 13 has an outlet 122 for the ball head 23 to pass through. The two ends of the groove 123 are connected to the inlet 121 and the outlet 122, respectively.

[0036] After the probe tube 12 clears the blocked lacrimal duct, the ball head 23 is inserted into the probe tube 12 through the inlet 121. Then, the guide wire 22 is continuously pushed downwards, causing the ball head 23 to move downwards along the internal channel of the probe tube 12. The guide wire 22 slides along the groove 123. When the ball head 23 reaches the probe head 13, it can slide out of the probe tube 12 through the outlet 122. When the ball head 23 exits through the outlet 122, it directly enters the inferior nasal meatus. At this point, simply continue moving the guide wire 22 forward to exit through the nostril. In this way, the probe tube 12 guides the sliding direction of the guide wire 22, allowing it to be quickly and accurately inserted into the lacrimal duct inlet without deviation during movement within the lacrimal duct, thus improving operational efficiency.

[0037] Reference Figure 2 and Figure 3In an optional embodiment, a guide ring 3 can be added to the outer wall of the probe outer tube 12 to guide the guide wire 22. Specifically, the guide ring 3 can be made of the same material as the probe outer tube 12, such as stainless steel, to ensure the uniformity and stability of the overall structure. The inner diameter of the guide ring 3 is slightly larger than the diameter of the ball head 23. The guide ring 3 and the inlet 121 are located on the same side, and the guide ring 3 is located on the side of the inlet 121 near the needle seat 11, that is, at the upper end of the inlet 121; so that when the guide wire 22 is inserted, the guide wire 22 can be inserted along the probe outer tube 12 under the action of the guide ring 3. It should be noted that in actual operation, the guide ring 3 and the inlet 121 are both located outside the lacrimal duct, and only the lower part of the probe outer tube 12 is inserted into the lacrimal duct for use.

[0038] When the ball head 23 is delivered from the ball outlet 122, the guide wire 22 can be removed from the probe outer tube 12 by cutting the guide ring 3. It should be noted that in this embodiment, both the lacrimal duct unblocking and drainage device are preferably disposable medical devices and should not be used by multiple people.

[0039] In an optional embodiment, to facilitate the detachment of the guide wire 22 from the probe outer tube 12 and to allow the probe to be used for probing the upper and lower lacrimal canaliculi respectively, the guide ring 3 also adopts an openable design. Optionally, the guide ring 3 consists of a first half-ring 31 and a second half-ring 32, wherein one end of the first half-ring 31 and the second half-ring 32 are both fixed to the side wall of the probe outer tube 12, and the other ends are connected to each other. Specifically, a snap-fit ​​portion 311 is fixed to the upper surface of the other end of the first half-ring 31. The snap-fit ​​portion 311 can be a spherical structure. A snap-fit ​​groove 321 is formed on the lower surface of the other end of the second half-ring 32 for the snap-fit ​​portion 311 to be press-fitted. Through the press-fit of the snap-fit ​​portion 311 and the snap-fit ​​groove 321, the connection is ensured to be firm and not easy to loosen. Meanwhile, both the first half-ring 31 and the second half-ring 32 are elastic. When disassembly is required, opposite forces are applied simultaneously to disengage the locking part 311 from the locking groove 321, so that the guide wire 22 can be removed from the guide ring 3.

[0040] Reference Figure 1 In an optional embodiment, the guide wire 22 can be further improved for ease of operation. Specifically, the end of the guide wire 22 near the guide tube is provided with a protrusion 221 by bending. The protrusion 221 mainly serves to facilitate the application of force and guidance. The degree of protrusion of the protrusion 221 is small so as to facilitate the protrusion 221 passing through the lacrimal duct. The end of the guide wire 22 near the ball head 23 is provided with a bend 222. The bending direction of the bend 222 is the same as the protrusion direction of the protrusion 221, so that the operator can better control the direction during the pushing process.

[0041] The implementation principle of the lacrimal duct unblocking and drainage device in this application embodiment is as follows: First, the lacrimal duct is unblocked through the probe tube 12. After unblocking, the probe tube 12 is not removed temporarily. Then, the ball head 23 at the end of the guide wire 22 passes through the guide ring 3 and enters the probe tube 12 from the inlet 121. It moves downward along the extension direction of the probe tube 12 until it exits from the outlet 122 and reaches the inferior nasal meatus. Then, the guide ring 3 is unlocked, allowing the guide wire 22 to disengage from the guide ring 3. Then... Then, the probe tube 12 can be removed upwards; finally, the position of the bend 222 is determined by the protrusion 221 on the guide wire 22. After adjusting the guide wire 22, it is moved forward and the lower end of the guide wire 22 is sent out of the nostril. At this time, one end of the drainage tube 21 is inserted into place; the other end of the drainage tube 21 is inserted again in the same way, so that both ends of the drainage tube 21 are inserted from the upper lacrimal canaliculus and the lower lacrimal canaliculus respectively, and exit from the lower end of the nostril. After completion, the excess drainage tube exposed at the nostril is cut short.

[0042] Example 2:

[0043] The difference between this embodiment and Embodiment 1 is that an infusion assembly 4 and a connector 5 are added.

[0044] Reference Figure 1 and Figure 4 Specifically, the infusion assembly 4 includes an integrally formed needle plug, connecting seat 42, and probe inner tube 43. The needle plug 41 is located at the end and is mainly used for connection to the syringe. The connecting seat 42 is integrally formed below the needle plug 41 and is detachably connected to the needle seat 11 via a connector 5. The probe inner tube 43 is connected to the lower end of the connecting seat 42 and can be slidably inserted into the probe outer tube 12. The probe inner tube 43 is also hollow internally. A first water outlet hole 431 is formed on the side wall of the end of the probe inner tube 43 away from the needle plug 41, and a corresponding second water outlet hole 124 is formed on the side wall of the probe outer tube 12. Liquid in the probe inner tube 43 can pass through the first water outlet hole 431 and the second water outlet hole 124 in sequence.

[0045] By adding an inner probe tube 43, the device gains a flushing function, further improving the unblocking effect. After flushing is complete, the connector 5 is unlocked, the syringe and infusion assembly 4 are removed, and the drainage tube 21 can be inserted through the outer probe tube 12.

[0046] Furthermore, the connector 5 includes a connecting rod 51 and a handle 52. One end of the connecting rod 51 is provided with an external thread. The connecting seat 42 is inserted into the inner side of the needle seat 11. An opening for the connecting rod 51 to pass through is provided on the side wall of the needle seat 11, and a threaded groove for the connecting rod 51 to be threadedly connected is provided on the outer side wall of the connecting seat 42. The handle 52 is connected to the end of the connecting rod 51. The handle 52 is cylindrical and may also have anti-slip textures on its side wall. After the lacrimal duct is cleared, the connecting rod 51 can be rotated by the handle 52 to disengage the needle seat 11 from the connecting seat 42, allowing the infusion assembly 4 to be removed upwards.

[0047] To facilitate positioning of the infusion assembly 4 during assembly, optionally, a positioning block 421 is fixed on the outer wall of the connecting seat 42, and a positioning groove 111 is provided on the inner wall of the needle seat 11 for the positioning block 421 to be inserted. The positioning groove 111 extends upward to the upper surface of the needle seat 11. When the positioning block 421 slides into the positioning groove 111, the opening on the needle seat 11 is aligned with the threaded groove on the connecting seat 42. At the same time, the second water outlet 124 on the probe outer tube 12 is also aligned with the first water outlet 431 on the probe inner tube 43.

[0048] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A lacrimal duct unblocking and drainage device, characterized in that: The device includes a dredging component (1) and a drainage component (2). The dredging component (1) includes an integrally structured needle seat (11), a probe outer tube (12), and a probe head (13). The drainage component (2) includes a drainage tube (21), two guide wires (22) connected to both ends of the drainage tube (21), and a ball head (23) connected to the end of the guide wires (22). The probe outer tube (12) is hollow inside and allows the ball head (23) to slide. The probe outer tube (12) is close to the... One end of the needle holder (11) is provided with an inlet (121) for the ball head (23) to enter. The outer tube of the probe (12) has a groove (123) along its length for the guide wire (22) to slide. The end of the probe head (13) is an arc surface. The end face of the probe head (13) is provided with an outlet (122) for the ball head (23) to pass through. The two ends of the groove (123) are respectively connected to the inlet (121) and the outlet (122).

2. The lacrimal duct unblocking and drainage device according to claim 1, characterized in that: A guide ring (3) is provided on the outer wall of the probe tube (12) away from the probe head (13). The guide ring (3) and the ball inlet (121) are located on the same side, and the guide ring (3) is located on the side of the ball inlet (121) close to the needle seat (11). The ball head (23) can pass through the guide ring (3).

3. The lacrimal duct unblocking and drainage device according to claim 2, characterized in that: The guide ring (3) is composed of a first half-ring (31) and a second half-ring (32) disposed on the side wall of the probe outer tube (12). The end of the first half-ring (31) is provided with a snap-fit ​​part (311) along its own axial direction, and the end of the second half-ring (32) is provided with a snap-fit ​​groove (321) for the snap-fit ​​part (311) to be press-fitted.

4. The lacrimal duct unblocking and drainage device according to claim 1, characterized in that: The guide wire (22) has a protrusion (221) at one end near the drainage tube (21), and a bend (222) at one end near the ball head (23). The ball head (23) is connected to the bend (222), and the protrusion direction of the protrusion (221) is the same as the bending direction of the bend (222).

5. A lacrimal duct unblocking and drainage device according to any one of claims 1-4, characterized in that: It also includes an infusion assembly (4) and a connector (5). The infusion assembly (4) includes an integrally structured needle plug, a connector (42), and a probe inner tube (43). The connector (42) and the needle seat (11) are detachably connected through the connector (5). The probe inner tube (43) is slidably inserted into the probe outer tube (12). A first water outlet hole (431) is provided on the side wall of the probe inner tube (43), and a second water outlet hole (124) is provided on the side wall of the probe outer tube (12). Liquid in the probe inner tube (43) can pass through the first water outlet hole (431) and the second water outlet hole (124) in sequence.

6. The lacrimal duct unblocking and drainage device according to claim 5, characterized in that: The connector (5) includes a connecting rod (51), one end of which is provided with an external thread. The connecting seat (42) is inserted into the needle seat (11). The needle seat (11) has an opening for the connecting rod (51) to pass through, and the connecting seat (42) has a threaded groove for the connecting rod (51) to be threadedly connected.

7. The lacrimal duct unblocking and drainage device according to claim 6, characterized in that: The connector (5) also includes a handle (52) which is connected to the end of the connecting rod (51).

8. The lacrimal duct unblocking and drainage device according to claim 7, characterized in that: A positioning block (421) is provided on the outer side wall of the connecting seat (42), and a positioning groove (111) is provided on the inner side wall of the needle seat (11) for the positioning block (421) to be inserted. The positioning groove (111) extends upward to the upper surface of the needle seat (11).

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