An expansion puncture drainage device

Abstract

The present invention provides an expanding puncture drainage device, which relates to the technical field of medical devices. Through the drainage tube body implanted in the Schlemm's canal, the cross-section of the Schlemm's canal, the natural outflow channel of aqueous humor, is enlarged to increase the outflow rate of aqueous humor. Through the puncture drainage structure arranged on the outer side of the drainage tube structure, aqueous humor can flow into the Schlemm's canal along the first through hole through the second through hole punctured in the inner wall of the Schlemm's canal, or can flow out along the channel formed by the second through hole punctured in the outer wall of the Schlemm's canal. This increases the form and quantity of the aqueous humor drainage channels, making it easier for aqueous humor to enter the downstream liquid collecting tube channel, helping to improve the aqueous humor drainage effect and reducing the risk of blockage of the aqueous humor drainage channel.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and in particular to an expansion puncture drainage device. Background Art

[0002] Glaucoma is a common eye disease characterized by increased intraocular pressure leading to optic nerve damage, which may eventually cause visual field loss or even blindness. It is the world's number one irreversible blinding eye disease. Currently, improving aqueous humor outflow and lowering intraocular pressure through minimally invasive surgery is one of the commonly used treatments for controlling the progression of glaucoma.

[0003] In existing minimally invasive glaucoma surgeries, one of the main techniques is to improve the efficiency of external drainage of aqueous humor by implanting an aqueous humor drainage implant in the natural outflow channel of aqueous humor (Schlemm's canal). These drainage implants are usually designed as tubular structures or nail-shaped structures, relying on the openings at both ends or the top of the drainage device to guide the aqueous humor from the anterior chamber into the Schlemm's canal, thereby reducing the intraocular pressure. However, existing drainage implants usually only provide a single drainage channel, which only partially solves the resistance of external drainage of aqueous humor in the trabecular meshwork, which may limit the outflow efficiency of aqueous humor and affect the drainage effect. Summary of the invention

[0004] In order to solve the problem of single drainage channel of drainage implants in the prior art, the present invention provides an expansion puncture drainage device, which provides a puncture drainage structure on the outside of the drainage tube structure so that the puncture drainage structure can drain the aqueous humor, thereby opening up a new way of aqueous humor drainage, increasing the drainage channels of the aqueous humor, and solving the problem of single drainage channel of drainage implants in the prior art.

[0005] The technical solution adopted by the present invention to solve its technical problem is:

[0006] An expansion puncture drainage device comprises a drainage tube structure and at least one puncture drainage structure arranged outside the drainage tube structure; wherein:

[0007] The drainage tube structure comprises a drainage tube body and a first through hole penetrating the interior of the drainage tube body;

[0008] The puncture drainage structure comprises a puncture drainage body and a second through hole penetrating through the puncture drainage body;

[0009] The puncture drainage body is connected to the side wall outside the drainage tube body, and the second through hole is communicated with the first through hole.

[0010] Optionally, the puncture drainage body is a conical structure.

[0011] Optionally, the longitudinal dimension of the bottom end of the puncture drainage body is greater than its transverse dimension.

[0012] Optionally, the top end of the puncture drainage body is of an inclined cutting surface structure.

[0013] Optionally, the number of the puncture drainage structures is four.

[0014] Optionally, the drainage tube structure is a variable diameter structure.

[0015] Optionally, the drainage tube body is a mesh structure, and the material of the drainage tube body is a shape memory material.

[0016] Optionally, the shape memory material is nitinol.

[0017] The beneficial effects of the present invention are as follows:

[0018] The dilating puncture drainage device provided by the present invention, through the puncture drainage structure arranged outside the drainage tube structure, enables the aqueous humor to flow out not only along the first through hole but also along the channel formed by the first through hole and the second through hole, increasing the form and number of the aqueous humor drainage channels, contributing to improving the aqueous humor drainage effect and reducing the risk of blockage of the aqueous humor drainage channels; and, since the second through hole is arranged in the puncture drainage body, and the puncture drainage body will pierce the Schlemm's canal wall and stay at the Schlemm's canal wall after implantation, on the one hand, it can avoid the displacement of the dilating puncture drainage device and improve its stability; on the other hand, the second through hole can become a permanent flow channel for the aqueous humor to avoid the inability of the aqueous humor to flow out due to the healing or closing of the punctured through hole on the Schlemm's canal wall, thereby improving the durability of the drainage effect on the basis of improving the drainage effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The present invention will be further described below in conjunction with the drawings and embodiments.

[0020] Figure 1 is a schematic structure of the dilating puncture drainage device in an embodiment of the present application Figure 1 ;

[0021] Figure 2 is a schematic structure of the dilating puncture drainage device in an embodiment of the present application Figure 2 ;

[0022] Figure 3 is a schematic structure of the dilating puncture drainage device in an embodiment of the present application Figure 3 .

[0023] Description of Component Labels

[0024] 1 Drainage tube structure

[0025] 11 Drainage tube body

[0026] 12 First through hole

[0027] 2 Puncture and drainage structure

[0028] 21 Puncture and drainage body

[0029] 22 Second through hole Specific implementation manner

[0030] The following uses specific specific examples to illustrate the implementation manners of the present application. Those skilled in the art can easily understand other advantages and effects of the present application from the content disclosed in this specification. The present application can also be implemented or applied through other different specific implementation manners. Various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present application. It should be noted that, without conflict, the following embodiments and the features in the embodiments can be combined with each other.

[0031] It should be noted that in the following description, reference is made to the accompanying drawings, which describe several embodiments of the present application. It should be understood that other embodiments can also be used, and mechanical composition, structure, electrical, and operational changes can be made without departing from the spirit and scope of the present application. The following detailed description should not be considered restrictive, and the scope of the embodiments of the present application is only defined by the claims of the published patent. The terms used here are only for describing specific embodiments and are not intended to limit the present application. Spatially related terms, such as "upper", "lower", "left", "right", "below", "beneath", "lower part", "above", "upper part", etc., can be used in the text to facilitate the description of the relationship between one element or feature shown in the figure and another element or feature.

[0032] In the present application, unless otherwise clearly defined and limited, terms such as "installed", "connected", "connected", "fixed", "held" 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 or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific situations.

[0033] Furthermore, as used herein, the singular forms "a", "an", and "the" are intended to include the plural forms as well, unless the context clearly dictates otherwise. It should be further understood that the terms "comprises" and "comprising" specify the presence of the stated features, operations, elements, components, items, species, and / or groups, but do not preclude the presence, occurrence, or addition of one or more other features, operations, elements, components, items, species, and / or groups. The terms "or" and "and / or" used herein are to be construed as inclusive, or meaning any one or any combination. Thus, "A, B, or C" or "A, B, and / or C" means "any of the following: A; B; C; A and B; A and C; B and C; A, B, and C". An exception to this definition occurs only when the combination of elements, functions, or operations is inherently mutually exclusive in some manner.

[0034] Before further elaborating on the present invention, the nouns and terms involved in the embodiments of the present invention are described. The nouns and terms involved in the embodiments of the present invention are applicable to the following explanations:

[0035] Schlemm's canal: That is, the scleral venous sinus, which is a circular tubular tissue in the scleral substance near the corneal limbus. It is an important "drainage pipe" for the outflow of aqueous humor in the eye. Approximately 85% of the aqueous humor enters the anterior chamber from the posterior chamber, converges into Schlemm's canal through the trabecular meshwork, and then converges into the scleral vein through the posterior segment collecting duct to complete the outflow of aqueous humor in the eye. The collapse and closure of Schlemm's canal will cause obstruction of the main channel for the outflow of aqueous humor, leading to an increase in intraocular pressure and the occurrence of glaucoma.

[0036] In order to make the objectives, technical solutions, and advantages of the present invention more clearly understood, the technical solutions in the embodiments of the present invention are further elaborated through the following embodiments in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the invention.

[0037] To solve the problem of the single drainage channel of the drainage implant in the prior art, the present invention provides a dilating puncture drainer. Refer to Figures 1 - 3 As shown, the dilating puncture drainer includes a drainage tube structure 1 and at least one puncture drainage structure 2 disposed outside the drainage tube structure 1. Among them, the drainage tube structure 1 includes a drainage tube body 11 and a first through hole 12 penetrating through the inside of the drainage tube body 11. The first through hole 12 is distributed along the axial direction of the drainage tube body 11 to form a first channel for guiding the flow of aqueous humor. The puncture drainage structure 2 includes a puncture drainage body 21 and a second through hole 22 penetrating through the puncture drainage body 21. The puncture drainage body 21 is connected to the side wall outside the drainage tube body 11 and serves as a puncture structure.

[0038] After the dilating puncturing drainage device is implanted into the Schlemm's canal, the puncturing drainage body 21 is used to puncture the Schlemm's canal wall. At the same time, the second through hole 22 communicates with the first through hole 12, so that a part of the aqueous humor flows out successively through the first through hole 12 and the second through hole 22, forming a second channel for guiding the flow of the aqueous humor.

[0039] The dilating puncturing drainage device provided by the present invention expands the cross-section of the Schlemm's canal, which is the natural outflow channel of the aqueous humor, through the drainage tube body implanted in the Schlemm's canal to increase the outflow rate of the aqueous humor. Through the puncturing drainage structure 2 arranged outside the drainage tube structure 1, the aqueous humor can flow into the Schlemm's canal along the first channel formed by the first through hole 12, and can also flow out along the second channel formed by the first through hole 12 and the second through hole 22, increasing the form and quantity of the aqueous humor drainage channels, making it easier for the aqueous humor to enter the downstream collecting tube channel, helping to improve the aqueous humor drainage effect and reducing the risk of blockage of the aqueous humor drainage channel; moreover, since the second through hole 22 is arranged in the puncturing drainage body 21, and the puncturing drainage body 21 will pierce the Schlemm's canal wall and stay fixed at the Schlemm's canal wall after implantation. On the one hand, it can prevent the dilating puncturing drainage device from shifting and improve its stability; on the other hand, it can make the second through hole 22 become a permanent flow channel for the aqueous humor, so as to avoid the situation that the aqueous humor cannot flow out due to the healing or closing of the punctured through hole on the Schlemm's canal wall, thereby improving the durability of the drainage effect on the basis of improving the drainage effect.

[0040] To facilitate puncturing the Schlemm's canal wall, the present invention preferably makes the puncturing drainage body 21 a conical structure. The tip design of the conical structure helps to reduce the resistance during puncturing and improve the puncturing efficiency and accuracy.

[0041] Furthermore, since the size of the drainage tube structure 1 is small, to ensure the stability of the connection between the puncturing drainage body 21 and the drainage tube structure 1 on the premise of ensuring the implantation comfort, the present invention preferably makes the longitudinal dimension of the bottom end of the puncturing drainage body 21 larger than its transverse dimension; the bottom end of the puncturing drainage body 21 refers to the end where the puncturing drainage body 21 is connected to the drainage tube body 11; the longitudinal dimension of the bottom end of the puncturing drainage body 21 refers to the dimension of the bottom end of the puncturing drainage body 21 distributed along the axial direction of the drainage tube body 11; on the contrary, the transverse dimension of the bottom end of the puncturing drainage body 21 refers to the dimension of the bottom end of the puncturing drainage body 21 distributed along the radial direction of the drainage tube body 11.

[0042] In order to further reduce the difficulty of puncture, the present invention preferably has a beveled surface structure at the top of the puncture drainage body 21. The beveled surface structure design can make it easier for the puncture drainage body 21 to penetrate the tissue, and can reduce the resistance during puncture, thereby reducing the difficulty and risk of the operation. In addition, the beveled surface design can also help to more accurately control the puncture depth, avoid unnecessary damage caused by excessive puncture, improve the accuracy and efficiency of puncture, and reduce tissue damage.

[0043] In the present invention, the number of the puncture drainage structures 2 is preferably four, and the four puncture drainage structures 2 are preferably distributed in a non-linear manner to ensure the stability of the implantation and the aqueous humor drainage effect.

[0044] Specifically, the present invention preferably has four puncture drainage structures 2 evenly distributed in three rows around the outer wall of the drainage tube structure 1. The puncture drainage structure 2 is surrounded on the outer wall of the drainage tube structure 1, which can more comprehensively cover the intraocular area to improve the drainage efficiency of the aqueous humor. At the same time, the design of three evenly distributed rows can further optimize the flow path of the aqueous humor, ensure that the aqueous humor is drained from different directions, and reduce the risk of dead angles and blockages.

[0045] The drainage tube structure 1 in the present invention can be a drainage tube already available in the prior art; in order to reduce the difficulty of implantation, the present invention preferably provides the drainage tube structure 1 as a variable diameter structure, that is, the drainage tube structure 1 includes a small diameter state and a large diameter state, and the drainage tube structure 1 can be converted between the small diameter state and the large diameter state according to actual needs. This design provides flexibility and adaptability; during the implantation process, the drainage tube structure 1 is in a small diameter state to reduce the incision during the implantation process, reduce damage to the eye tissue, and reduce the difficulty of implantation; after the expansion puncture drainage device is implanted into the eye through corresponding injection instruments and other tools, the drainage tube structure 1 expands to a large diameter state to support the Schlemm tube and ensure the drainage effect.

[0046] Specifically, the present invention preferably has a drainage tube body 11 of a mesh structure, and the material of the drainage tube body 11 is a shape memory material, which can change its shape under certain conditions. In this embodiment, when the expansion puncture drainage device is in the push injection device, the mesh structure is in a retracted state under the constraint of the push injection device, so that the drainage tube body 11 is in a small diameter state; after implantation, there is no object constraining the outside of the mesh structure, and the mesh structure expands, so that the drainage tube body 11 is in a large diameter state, supporting the Schlemm tube.

[0047] In addition, since the drainage tube body 11 is a mesh structure, the mesh holes in the mesh structure also form a flow channel for the aqueous humor, further increasing the form and number of the aqueous humor flow channels, thereby improving the drainage efficiency.

[0048] Furthermore, the shape memory material of the present invention is preferably a nickel-titanium alloy. The nickel-titanium alloy has good biocompatibility, does not cause significant immune reactions or inflammation, and is suitable for long-term implantation. At the same time, due to the softness and shape memory characteristics of the nickel-titanium alloy, the drainage tube body 11 can provide a comfortable experience during and after implantation, reducing the discomfort of the patient. Therefore, using a nickel-titanium alloy can ensure biocompatibility and implantation comfort while ensuring the effect of dilation and drainage.

[0049] It should be noted that the dilation and puncture drainage device of the present invention can be set to different sizes according to different clinical needs for reducing intraocular pressure, that is, the implantation range of the dilation and puncture drainage device implanted into the Schlemm's canal is not limited and can be set according to the actual situation. For example, the implantation range can be 90°, 120°, 180°, 360°, etc.

[0050] Taking the above ideal embodiments based on the present invention as an inspiration, through the above description, relevant staff can completely make various changes and modifications without departing from the technical idea of the present invention. The technical scope of the present invention is not limited to the content in the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. An expandable puncture drainage device, characterized in that, It includes a drainage tube structure (1) and at least one puncture drainage structure (2) arranged outside the drainage tube structure (1); wherein, The drainage tube structure (1) includes a drainage tube body (11) and a first through hole (12) penetrating through the inside of the drainage tube body (11); The puncture drainage structure (2) includes a puncture drainage body (21) and a second through hole (22) penetrating through the puncture drainage body (21); the puncture drainage body (21) is a conical structure; the puncture drainage structures (2) are evenly distributed around the outer wall of the drainage tube structure (1); The puncture drainage body (21) is connected to the side wall outside the drainage tube body (11), and the second through hole (22) communicates with the first through hole (12).

2. The dilating puncture drainage device according to claim 1, wherein, The longitudinal dimension of the bottom end of the puncture drainage body (21) is larger than its transverse dimension.

3. The dilating puncture drainage device according to claim 1, characterized in that The top end of the puncture drainage body (21) is an inclined cutting surface structure.

4. The dilating puncture drainage device according to claim 1, wherein, The number of the puncture drainage structures (2) is four.

5. The dilating puncture drainage device according to any one of claims 1-4, characterized in that, The drainage tube structure (1) is a variable diameter structure.

6. The dilating puncture drainage device according to claim 5, wherein, The drainage tube body (11) is a mesh structure, and the material of the drainage tube body (11) is a shape memory material.

7. The dilating puncture drainage device according to claim 6, wherein, The shape memory material is nitinol.

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