Lacrimal sac stent for endoscope lacrimal sac and nasal cavity anastomosis

Abstract

A lacrimal sac stent for endoscope lacrimal sac and nasal cavity anastomosis comprises a supporting piece, the supporting piece is of a tubular structure, one end of the supporting piece is closed, a window in a communicating pipe is formed in the position, close to the closed end, of the supporting piece, and an anti-disengaging buckle is arranged at the other end of the supporting piece; the guiding piece is of a needle-shaped structure and can be inserted into the closed end of the supporting piece through the window; the expansion piece is of a spindle-shaped structure and is provided with a channel arranged in the axial direction, and the expansion piece can be arranged on the supporting piece in a sleeving mode through the channel. According to the scheme, the fusiform expansion piece is arranged on the tubular supporting piece in the sleeving mode, so that the supporting expansion and drainage effect on the lacrimal sac fistula is achieved; the dacryocyst stent is more convenient to place by utilizing the guide piece, and the upper lacrimal passage is not easy to damage; the technical problems that in the prior art, a lacrimal sac stent is small in effective pipe diameter, unsatisfactory in fistula supporting and expanding effect, prone to damage an upper lacrimal passage when placed, prone to falling off, difficult to take out and the like are solved, and the lacrimal sac stent has the advantages of being simple in structure, convenient to operate, high in operation success rate and the like.

Description

Technical Field

[0001] The utility model relates to the technical field of medical instruments, in particular to a lacrimal sac support for endoscopic lacrimal cystonasal anastomosis. Background Art

[0002] Dacryocystitis is a common ophthalmic disease, and surgical treatment is the best choice for patients with dacryocystitis. External dacryocystorhinostomy (Ex-DCR) is a classic and effective surgery, but it has disadvantages such as scars on the skin of the inner canthus and the inability to treat nasal complications at the same time. With the deepening of clinical understanding of the local anatomy and pathophysiological characteristics of the tear drainage system and the rapid development and improvement of endoscopic surgical systems, micro-power systems and other equipment, endoscopic dacryocystorhinostomy (En-DCR) has become more mature and has become one of the main methods for the treatment of chronic dacryocystitis. Endoscopic dacryocystorhinostomy is to establish a new drainage channel between the lacrimal sac and the nasal cavity under nasal endoscopy. This operation has a high success rate, little trauma, and leaves no scars on the face. It is currently the mainstream procedure. However, one of the difficulties in endoscopic lacrimal cystostomy is that the anastomosis cannot be effectively supported and fixed, and the lacrimal sac fistula is prone to collapse and narrowing, resulting in anastomotic adhesion and surgical failure, so a lacrimal sac stent needs to be placed. Recent clinical studies have also found that for patients with small lacrimal sacs, placing a lacrimal sac stent during surgery can significantly improve the success rate of the operation.

[0003] The tear sac stent mainly supports the expansion of the tear sac fistula and drainage. Existing tear sac stents used for endoscopic dacryocystorhinostomy are mostly composed of thin tubes or groove-shaped stents. The effective diameter of the thin tube is small, and it is difficult to effectively support and expand the fistula; the groove-shaped stent is easy to fall off and is not easy to remove after surgery. The placement of some tear sac stents requires the use of traction metal tear duct probes or silk threads, which can easily damage the inner wall of the lacrimal puncta, lacrimal canaliculi and common lacrimal duct, resulting in complications such as tearing of the lacrimal puncta, obstruction of the lacrimal canaliculi or common lacrimal duct, etc.

[0004] Therefore, in view of the shortcomings of the existing technology, it is necessary to design a lacrimal sac stent for endoscopic dacryocystorhinostomy to solve the above problems. Utility Model Content

[0005] In order to overcome the deficiencies in the above-mentioned prior art, the purpose of the utility model is to provide a lacrimal sac stent for endoscopic dacryocystorhinostomy, which can solve the technical problems of the lacrimal sac stent in the prior art, such as small effective tube diameter, unsatisfactory effect on supporting and expanding the fistula, easy damage to the upper lacrimal duct during placement, easy falling off, and difficult removal.

[0006] In order to achieve the above-mentioned purpose and other related purposes, the technical solution provided by the utility model is: a lacrimal sac stent for endoscopic dacryocystorhinostomy, comprising:

[0007] A support member, wherein the support member is a tubular structure and one end is closed, a window communicating with the inside of the tube is provided on the support member near the closed end, and an anti-drop buckle is provided on the other end of the support member;

[0008] A guide member, the guide member is configured as a needle-like structure and can be inserted into the closed end of the support member through the window;

[0009] The expansion piece is configured as a spindle-shaped structure and has a channel arranged along the axial direction. The expansion piece can be sleeved on the support piece through the channel.

[0010] The preferred technical solution is: the support member and the expansion member are both made of silicone material, and the guide member is made of stainless steel material.

[0011] The preferred technical solution is: the length of the support member is 12 cm, and the outer diameter of the support member is 1 mm.

[0012] The preferred technical solution is: the distance between the window and the closed end of the support member is 2.5 cm.

[0013] The preferred technical solution is: the guide member has a handle portion and a needle body portion, the handle portion is 3 cm long, the needle body portion is 9 cm long, and the outer diameter of the needle body portion is 0.3 mm.

[0014] The preferred technical solution is: the anti-drop buckle is constructed as an elliptical ring structure and is connected to the support member via a section of silicone tube.

[0015] The preferred technical solution is: the long axis of the anti-dropping buckle is arranged parallel to the axis of the supporting member; the long axis length of the anti-dropping buckle is 3 mm, and the short axis length of the anti-dropping buckle is 2 mm.

[0016] The preferred technical solution is: the length of the expansion piece is 11 mm, and the maximum outer diameter of the expansion piece is 5 mm.

[0017] Due to the application of the above technical solution, the utility model has the following beneficial effects:

[0018] The utility model provides a lacrimal sac stent for endoscopic lacrimal cystorhinostomy, which achieves the supporting, expanding and draining effects on the lacrimal sac fistula by sleeve-arranging a spindle-shaped expansion piece on a tubular support piece; a guide piece is used to make the placement of the lacrimal sac stent more convenient and less likely to damage the upper lacrimal duct; when removing the lacrimal sac stent one month after the operation, it is only necessary to cut off the anti-detachment buckle at the top of the support piece and then pull the support piece out of the nasal cavity as a whole. This solution solves the shortcomings of existing lacrimal sac stents and can significantly improve the success rate of endoscopic lacrimal cystorhinostomy. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the assembly of the support member and the expansion member involved in the utility model.

[0020] Figure 2 This is a schematic diagram of the guide member involved in the utility model. DETAILED DESCRIPTION

[0021] The following is a description of the implementation of the present invention by means of specific embodiments. People familiar with the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification.

[0022] See also Figure 1-Figure 2 . It should be noted that in the description of the present utility model, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, or the positions or positional relationships in which the utility model product is usually placed when in use. They are only for the convenience of describing the present utility model 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 the present utility model. In addition, the terms "first", "second", "third" and the like are only used to distinguish the description, and cannot be understood as indicating or implying relative importance. Terms such as "horizontal", "vertical", and "overhanging" do not mean that the components are required to be absolutely horizontal or overhanging, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0023] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection, it can be a mechanical connection, it can be an electrical connection, it can be a direct connection, it can be indirectly connected through an intermediate medium, and it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0024] Example:

[0025] like Figure 1 to Figure 2 As shown, according to an overall technical concept of the utility model, a lacrimal sac stent for endoscopic lacrimal cystorhinostomy is provided, comprising: a support member 1, the support member 1 is configured as a tubular structure and one end is closed, a window 11 connecting to the inside of the tube is provided on the support member 1 near the closed end, and an anti-drop buckle 12 is provided on the other end of the support member 1; a guide member 2, the guide member 2 is configured as a needle-like structure and can be inserted into the closed end of the support member 1 through the window 11; an expansion member 3, the expansion member 3 is configured as a spindle-shaped structure and has a channel (not shown) arranged along the axial direction, and the expansion member 3 can be sleeved on the support member 1 through the channel.

[0026] like Figure 1 to Figure 2 As shown, in an exemplary embodiment of the present invention, the support member 1 and the expansion member 3 are both made of silicone material to reduce the discomfort felt by the patient during the operation; the guide member 2 is made of stainless steel material to facilitate guiding the support member and facilitate surgical operations.

[0027] like Figure 1 to Figure 2 As shown, in an exemplary embodiment of the present invention, the length of the support member 1 is 12 cm, and the outer diameter of the support member 1 is 1 mm.

[0028] like Figure 1 to Figure 2 As shown, in an exemplary embodiment of the present invention, the distance between the window 11 and the closed end of the support member 1 is 2.5 cm.

[0029] like Figure 1 to Figure 2 As shown, in an exemplary embodiment of the present invention, the guide member 2 has a handle portion 21 and a needle portion 22 , the handle portion 21 is 3 cm long, the needle portion 22 is 9 cm long, and the outer diameter of the needle portion 22 is 0.3 mm.

[0030] like Figure 1 to Figure 2 As shown, in an exemplary embodiment of the present utility model, the anti-drop buckle 12 is configured as an elliptical ring structure and is connected to the support member 1 via a section of silicone tube.

[0031] like Figure 1 to Figure 2 As shown, in an exemplary embodiment of the present invention, the long axis of the anti-dropping buckle 12 is arranged parallel to the axis of the support member 1; the long axis length of the anti-dropping buckle 12 is 3 mm, and the short axis length of the anti-dropping buckle 12 is 2 mm.

[0032] like Figure 1 to Figure 2 As shown, in an exemplary embodiment of the present invention, the length of the expansion piece 3 is 11 mm, and the maximum outer diameter of the expansion piece 3 is 5 mm.

[0033] The lacrimal sac stent in this solution supports and expands the lacrimal sac fistula through the stent body (expanding member 3), and at the same time, the guide member 2, the supporting member 1 and the anti-drop buckle 12 are used to improve the convenience of taking and placing, so that the success rate of endoscopic lacrimal cystorhinostomy is higher. This solution solves the technical problems of the existing technology that the lacrimal sac stent has a small effective diameter, has an unsatisfactory effect on supporting and expanding the fistula, is easy to damage the upper lacrimal duct when placed, is easy to fall off, and is difficult to remove. During specific use, i.e., endoscopic lacrimal cystonasal anastomosis, after anesthesia, a nasal mucosal flap is routinely made, a bone hole and a lacrimal sac flap are prepared, the lacrimal sac flap is anastomosed with the nasal mucosal flap, the upper lacrimal punctum is expanded, and the support member 1 guided by the guide 2 is inserted from the upper lacrimal canaliculus to the lacrimal sac fistula, the guide 2 is withdrawn, the rear end of the support member 1 is pulled down to expose the nasal cavity, and the support member 1 is inserted into the channel of the expansion member 3 under the guidance of the guide 2, and then the expansion member 3 is slid along the support member 1 to the appropriate position of the lacrimal sac fistula, and the part of the support member 1 that is too long in the nasal cavity is cut off to complete the operation. The entire operation is very convenient to operate. When removing the lacrimal sac stent one month after the operation, it is only necessary to cut off the anti-detachment buckle 12 at the top of the support member 1, and then pull the support member 1 out of the nasal cavity as a whole.

[0034] Therefore, the utility model has the following advantages:

[0035] The utility model provides a lacrimal sac stent for endoscopic lacrimal cystorhinostomy, which achieves the supporting, expanding and draining effects on the lacrimal sac fistula by sleeve-arranging a spindle-shaped expansion piece on a tubular support piece; a guide piece is used to make the placement of the lacrimal sac stent more convenient and less likely to damage the upper lacrimal duct; when removing the lacrimal sac stent one month after the operation, it is only necessary to cut off the anti-detachment buckle at the top of the support piece and then pull the support piece out of the nasal cavity as a whole. This solution solves the shortcomings of existing lacrimal sac stents and can significantly improve the success rate of endoscopic lacrimal cystorhinostomy.

[0036] The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. Anyone familiar with the technology may modify or alter the above embodiments without violating the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by a person of ordinary skill in the art without departing from the spirit and technical concept disclosed by the present invention shall still be covered by the claims of the present invention.

Claims

1. A lacrimal sac stent for endoscopic dacryocystorhinostomy, characterized in that: include: A support member, wherein the support member is a tubular structure and one end is closed, a window communicating with the inside of the tube is provided on the support member near the closed end, and an anti-drop buckle is provided on the other end of the support member; A guide member, the guide member is configured as a needle-like structure and can be inserted into the closed end of the support member through the window; The expansion piece is configured as a spindle-shaped structure and has a channel arranged along the axial direction. The expansion piece can be sleeved on the support piece through the channel.

2. The lacrimal sac stent for endoscopic dacryocystorhinostomy according to claim 1, characterized in that: The supporting member and the expanding member are both made of silicone material, and the guiding member is made of stainless steel material.

3. The lacrimal sac stent for endoscopic dacryocystorhinostomy according to claim 1, characterized in that: The length of the support member is 12 cm, and the outer diameter of the support member is 1 mm.

4. The lacrimal sac stent for endoscopic dacryocystorhinostomy according to claim 1, characterized in that: The distance between the window and the closed end of the support member is 2.5 cm.

5. The lacrimal sac stent for endoscopic dacryocystorhinostomy according to claim 1, characterized in that: The guide member comprises a handle portion and a needle body portion, the handle portion is 3 cm long, the needle body portion is 9 cm long, and the outer diameter of the needle body portion is 0.3 mm.

6. The lacrimal sac stent for endoscopic dacryocystorhinostomy according to claim 1, characterized in that: The anti-drop buckle is formed into an elliptical ring structure and is connected to the support member via a silicone tube.

7. The lacrimal sac stent for endoscopic dacryocystorhinostomy according to claim 6, characterized in that: The long axis of the anti-dropping buckle is arranged parallel to the axis of the supporting member; the long axis length of the anti-dropping buckle is 3 mm, and the short axis length of the anti-dropping buckle is 2 mm.

8. The lacrimal sac stent for endoscopic dacryocystorhinostomy according to claim 1, characterized in that: The length of the expansion piece is 11 mm, and the maximum outer diameter of the expansion piece is 5 mm.

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