Lacrimal passage indwelling catheter for treating congenital nasolacrimal duct obstruction

Abstract

The utility model belongs to the technical field of medical instruments, and particularly relates to a lacrimal passage indwelling catheter for treating congenital nasolacrimal duct blockage, which comprises a hose, a marking belt is arranged in the middle of the hose, an air bag is arranged on each of two sides of the marking belt in the hose, a separation pad is arranged in each of the parts in the air bags in the hose, and an air bag is arranged in each separation pad. A through hole used for being communicated with the air bag is formed in the hose and located on the side, facing the marking belt, of the separation pad. After the hose is placed in the lacrimal passage of a child patient, a needle cylinder can penetrate through the silica gel pad located in the marking belt to inject liquid into the hose, after the liquid flows into the air bag, the air bag can be bulged, the effect of expanding the lacrimal passage is achieved, the outer wall of the air bag can be attached to the uneven inner wall in the lacrimal passage through expansion of the air bag, and therefore the effect of expanding the lacrimal passage is achieved. And compared with a traditional mode, knotting of the front end of the hose is not needed any more, and the discomfort of a child patient can be reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of medical instruments, and particularly relates to a lacrimal duct catheter for treating congenital nasolacrimal duct obstruction. Background Art

[0002] Congenital lacrimal duct obstruction is caused by the failure of the opening of the lacrimal duct in the nose to open naturally at birth, but is blocked by a thin film, and tears cannot flow naturally into the nose. They can only "pool" in the eyes or flow out, which is medically called "epiphora". The prevalence of congenital lacrimal duct obstruction in full-term newborns is about 5%, so it is also called "neonatal dacryocystitis". Traditional lacrimal duct probing surgery has limitations. Many complex lacrimal duct obstructions require multiple probing surgeries, and multiple probing surgeries can cause false passages in the lacrimal duct for children, that is, iatrogenic damage to the lacrimal duct.

[0003] With the introduction of lacrimal duct intubation surgery (also known as lacrimal duct catheterization), it has brought good news to children with congenital lacrimal duct obstruction in the country; the operation method of lacrimal duct catheterization is to insert a silicone hose from the lacrimal punctum into the lacrimal sac and nasolacrimal duct using a rod-shaped probe. After the large head reaches the nasal cavity, a special hook is used to hook the large head of each rod-shaped probe and pull it outwards. After the operation, the front end of the silicone hose needs to be knotted to form a knot, so that the silicone hose can be fixed and will not fall off, and thus remains in the body as a fixing object to maintain the connection state of the lacrimal duct.

[0004] With the popularization of lacrimal duct catheterization, it has gradually been found that the hose placed in the lacrimal duct of children during the operation of lacrimal duct catheterization has certain deficiencies. The current hose cannot be well fixed in the lacrimal duct after being inserted. The knotting fixation method will cause discomfort to children, and children have low self-control. In case of discomfort, they will easily rub and scratch with their hands, so the hose will fall off. Content of the Utility Model

[0005] In order to solve the above technical problems, the utility model provides a lacrimal duct catheter for treating congenital nasolacrimal duct obstruction, and the technical solution adopted is as follows:

[0006] A lacrimal duct catheter for treating congenital nasolacrimal duct obstruction includes a hose. A marking band is provided at the middle position of the hose. An airbag is provided on each side of the marking band in the hose. A partition pad is provided in the part of the hose located inside the airbag. A through hole for communicating with the airbag is opened on the side of the partition pad facing the marking band inside the hose.

[0007] Further, a silicone pad is embedded at the position of the marking band in the hose. The silicone pad has elasticity, and after the syringe is pulled out, the needle hole will be closed under the extrusion of the surrounding parts.

[0008] Further, jacks for inserting the rod-shaped probe are respectively provided at both ends of the hose, and the hose can be inserted into the lacrimal duct.

[0009] Further, the airbag adopts a TPU film airbag with a thickness less than 0.1 mm, and the thickness of the hose is 1-3 times that of the airbag, which can reduce the influence on the hose when the injection liquid makes the airbag bulge.

[0010] Compared with the prior art, the utility model has the following beneficial effects:

[0011] After the hose of the utility model is placed in the lacrimal duct of the child, the syringe can pass through the silica gel pad in the marking band and inject liquid into the hose. After the liquid flows into the airbag, the airbag can bulge. In addition to playing the role of dilating the lacrimal duct, the outer wall of the airbag can be attached to the uneven inner wall of the lacrimal duct through the expansion of the airbag, so as to play a better fixing role and prevent the hose from falling off. Compared with the traditional method, it is no longer necessary to tie a knot at the front end of the hose, which can reduce the discomfort of the child.

[0012] After the syringe of the utility model is pulled out from the silica gel pad, the needle hole will be blocked under the elastic extrusion of the silica gel pad itself. When the hose needs to be removed, just cut it from the position of the hose marking band with scissors, and the leaked medicine can also be used to wash the lacrimal duct, playing an anti-inflammatory role. Description of the Drawings

[0013] Figure 1 is the overall structural schematic diagram of the utility model;

[0014] Figure 2 is the internal structural schematic diagram of the utility model;

[0015] Figure 3 is the utility model Figure 2 The enlarged schematic diagram of the structure at A in;

[0016] Figure 4 is the utility model Figure 2 The enlarged schematic diagram of the structure at B in.

[0017] In the figure:

[0018] 1 - hose, 11 - jack, 12 - through hole, 13 - partition pad 2 - airbag, 3 - marking band, 4 - silica gel pad. Detailed Embodiment

[0019] To enable those skilled in the art to better understand the solution of the present utility model, the technical solutions in the embodiments of the present utility model will be clearly and completely described below. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0020] As shown in the Figures 1-4 accompanying drawings.

[0021] A lacrimal duct catheter for treating congenital nasolacrimal duct obstruction includes a flexible tube 1. A marking band 3 for marking the middle position is provided at the middle position of the flexible tube 1. Insertion holes 11 for inserting a rod-shaped probe are respectively provided at both ends of the flexible tube 1. During use, in the same way as the traditional insertion method, the flexible tube is inserted into the lacrimal sac and nasolacrimal duct from the lacrimal punctum using the rod-shaped probe. After the large head reaches the nasal cavity, the rod-shaped probe is then removed. The difference from the traditional method is that there is no need to tie a knot at the front end of the flexible tube, which can reduce the discomfort of the child.

[0022] An airbag 2 is provided on both sides of the marking band 3 in the flexible tube 1. A partition pad 13 is provided in the part of the flexible tube 1 located inside the airbag 2. A through hole 12 for communicating with the airbag 2 is opened on the side of the partition pad 13 facing the marking band 3 in the flexible tube 1. A silica gel pad 4 is embedded at the position of the marking band 3 in the flexible tube 1. During use, after the flexible tube 1 is placed in the child's lacrimal duct, the position of the marking band 3 needs to be kept in the middle position and exposed at the corner of the eye. Then, a syringe is used to penetrate the silica gel pad 4 in the marking band 3 and inject liquid into the flexible tube 1. The liquid can flow into the airbag 2 through the through hole 12, so that the airbag 2 bulges. In addition to the role of expanding the lacrimal duct, the outer wall of the airbag 2 can be made to fit the uneven inner wall of the lacrimal duct through the expansion of the airbag 2, so as to play a better fixing role and prevent the flexible tube from falling off.

[0023] To reduce the impact on the flexible tube 1 when the airbag 2 bulges due to the injection of liquid, the airbag 2 uses a TPU film airbag with a thickness less than 0.1 mm, and the thickness of the flexible tube 1 is 1 - 3 times the thickness of the airbag 2. Therefore, when the flexible tube 1 has not been affected, the airbag 2 has completed the inflation action.

[0024] To prevent the liquid injected into the flexible tube 1 from leaking out, a silica gel pad 4 with a certain elasticity is provided in the marking band 3, and the wall thickness of the flexible tube 1 at the position of the marking band 3 is greater than the wall thickness of the rest of the flexible tube 1. Therefore, after the syringe is pulled out from the silica gel pad 4, the needle hole will be blocked by the elastic extrusion of the silica gel pad 4 itself. The extrusion received by the flexible tube 1 and the airbag 2 during normal use is not sufficient to open the needle hole in the silica gel pad 4.

[0025] When it is necessary to remove the hose 1, just use scissors to cut it at the position of the marking tape 3 of the hose 1, and then it can be taken out from the nasal cavity. At the same time of taking it out, the liquid in the airbag 2 and the hose 1 will leak out. This liquid can be anti-inflammatory eye drops, and the leaked liquid can also be used to irrigate the lacrimal duct, playing an anti-inflammatory role.

[0026] Any technical solution using the technical solution of the present utility model, or any technical solution designed by those skilled in the art inspired by the technical solution of the present utility model and achieving the above technical effects shall fall within the protection scope of the present utility model.

Claims

1. A lacrimal duct catheter for treating congenital nasolacrimal duct obstruction, comprising a hose (1), characterized in that: A marking band (3) is provided in the middle of the hose (1), an air bag (2) is provided on both sides of the marking band (3) in the hose (1), a separation pad (13) is provided in a portion of the hose (1) located inside the air bag (2), and a through hole (12) for connecting with the air bag (2) is provided in the hose (1) and located on a side of the separation pad (13) facing the marking band (3).

2. A lacrimal duct catheter for treating congenital nasolacrimal duct obstruction as claimed in claim 1, characterized in that: A silicone pad (4) is embedded in the position of the marking band (3) in the hose (1).

3. The lacrimal duct catheter for treating congenital nasolacrimal duct obstruction according to claim 1, characterized in that: Both ends of the hose (1) are respectively provided with insertion holes (11) for inserting a rod-shaped probe.

4. The lacrimal duct catheter for treating congenital nasolacrimal duct obstruction according to claim 1, characterized in that: The airbag (2) is a TPU film airbag with a thickness of less than 0.1 mm.

5. A lacrimal duct catheter for treating congenital nasolacrimal duct obstruction as claimed in claim 4, characterized in that: The thickness of the hose (1) is 1 to 3 times the thickness of the airbag (2).

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