CN219166865U - Ocular surface drainage material - Google Patents

Abstract

The utility model discloses an ocular surface drainage substance, which comprises a drainage inlet, a drainage outlet and a drainage channel arranged between the drainage inlet and the drainage outlet; the drainage inlet is used for being inserted into an anterior chamber in an eye, and the drainage outlet is used for exposing an eye surface; also included is a fixation portion for coupling with intraocular tissue. In the utility model, the ocular surface drainage material can establish an artificial drainage channel from the anterior chamber to the ocular surface, drain aqueous humor in the eye, reduce intraocular pressure and treat glaucoma; at the same time, the liquid in the anterior chamber can be drained to the ocular surface to treat xerophthalmia. The fixed part grows together with the intraocular tissue, and when the eye is extruded or collided by external force, the ocular surface drainage material cannot shift; the drainage outlet of the ocular surface drainage substance is far away from the conjunctival wound, and the blockage of the tube can not occur. The device has the advantages of small volume, small trauma to eyes, quick healing of eyes, no generation of filtering bubbles and no influence on the appearance of patients.

Description

Ocular surface drainage material

Technical Field

The utility model relates to the technical field of ocular implants, in particular to an ocular surface drainage substance.

Background

Glaucoma is the first irreversible blinding eye disease worldwide, mainly affecting women and asian populations. As the population ages, the prevalence of glaucoma increases year by year.

Intraocular pressure (IOP) is an independent risk factor for glaucoma, leading to further damage to the glaucomatous optic nerve, and controlling intraocular pressure is an economical practice. In developing countries, surgical treatment of glaucoma may be a better way of glaucoma treatment. Current glaucoma surgery is of a wide variety of treatments, such as laser therapy, trabeculectomy, drainage devices, and MIGS. Various surgical formulas or devices have certain limitations, such as short effective time of laser treatment, more postoperative complications of trabeculectomy, larger wound of drainage device and limited ocular hypotensive effect of MIGS.

The following drainage modes also have respective disadvantages:

anterior chamber-trabecular MIGS drainage: the drainage tube or the drainage nail penetrates through the trabecular meshwork and is communicated with the anterior chamber and the schlemms tube, aqueous humor is guided into the schlemms tube through the drainage device under the action of anterior chamber pressure, and aqueous humor in the schlemms tube is circulated through the collecting tube and the scleral vein. Through the above processes, aqueous humor of the anterior chamber is reduced, and intraocular pressure is lowered. However, the drainage method has limited blood pressure reducing capability and is suitable for treating patients with middle-early glaucoma. And some patients have a schlemms tube blocked or sticky condition, in which the ocular pressure is not well reduced by communicating the anterior chamber with the trabecular meshwork.

Filtration bleb MIGS drainage: the conjunctiva or sclera is surgically or otherwise separated to form a bleb space. A drainage tube is used to penetrate the trabecular meshwork transsclerally, communicating the anterior chamber with the bleb. Under the action of anterior chamber pressure, aqueous humor is guided into the filtering bleb space through the drainage tube, and is absorbed through the sclera, so that aqueous humor circulation is completed. Through the above processes, aqueous humor of the anterior chamber is reduced, and intraocular pressure is lowered. The drainage effect of the drainage method is directly related to the shape of the filtering blebs. The regeneration capability of sclera and conjunctiva is stronger, and there is the scar risk after the operation makes the bleb, reduces drainage effect. And the filtering blebs are positioned on the surface of eyes, so that the appearance of patients is affected to a certain extent, and part of patients have a contradicting emotion to the operation.

In addition, dry eye is a common condition that occurs when tears do not provide adequate lubrication to the eye. Tears may be inadequate and unstable for a number of reasons. For example, dry eye may occur if tear secretion is insufficient or of low quality. This tear instability can lead to inflammation and damage to the surface of the eye. The current mainstream method for treating xerophthalmia is eye drops, but eye drops have poor compliance, and patients are difficult to use for a long time without omission. There is a lack of ocular surface drainage in the prior art which can treat glaucoma as well as dry eye.

Disclosure of Invention

The utility model provides an ocular surface drainage substance, which solves the problem that the prior art lacks an ocular surface drainage substance capable of treating glaucoma and xerophthalmia.

In order to solve the technical problems, the technical scheme adopted by the utility model is to provide an ocular surface drainage object which comprises a drainage inlet, a drainage outlet and a drainage channel arranged between the drainage inlet and the drainage outlet; the drainage inlet is used for being inserted into an anterior chamber in an eye, and the drainage outlet is used for exposing an eye surface; also included is a fixation portion for coupling with intraocular tissue.

Preferably, the middle portion of the drainage channel is wound to form a disc-shaped drainage channel, and the disc-shaped drainage channel is used as the fixing part and is used for being buried between conjunctiva and sclera in the eye.

Preferably, the fixing part comprises two fixing sheets symmetrically arranged relative to the drainage channel.

Preferably, the ocular surface drainage material is composed of a plurality of layers of polymers in a composite mode, and a plurality of layers of polymers are provided with flow channels.

Preferably, the drainage inlet is provided with an inclined section, and an included angle between the inclined section and the axis of the drainage channel is 30-45 degrees.

Preferably, the cross section of the drainage channel is circular, the inner diameter of the drainage channel ranges from 0.04mm to 0.1mm, and the outer diameter of the drainage channel ranges from 0.25mm to 0.35mm.

Preferably, the drainage channel further comprises a proximal drainage channel and a distal drainage channel which are perpendicular to each other, one end of the disc-shaped drainage channel is connected with the proximal drainage channel, and the other end of the disc-shaped drainage channel is connected with the distal drainage channel.

Preferably, the drainage channel is linear.

Preferably, the multiple layers of polymers are respectively a top layer polymer, a middle layer polymer and a bottom layer polymer, and the drainage channel is formed by combining the top layer polymer, the middle layer polymer and the bottom layer polymer together.

Preferably, the ocular surface drainage is made of a hydrophobic material.

The beneficial effects of the utility model are as follows: the utility model discloses an ocular surface drainage substance, which comprises a drainage inlet, a drainage outlet and a drainage channel arranged between the drainage inlet and the drainage outlet; the drainage inlet is used for being inserted into an anterior chamber in an eye, and the drainage outlet is used for exposing an eye surface; also included is a fixation portion for coupling with intraocular tissue. In the utility model, the ocular surface drainage material can establish an artificial drainage channel from the anterior chamber to the ocular surface, drain aqueous humor in the eye, reduce intraocular pressure and treat glaucoma; at the same time, the liquid in the anterior chamber can be drained to the ocular surface to treat xerophthalmia. The fixed part grows together with the intraocular tissue, and when the eye is extruded or collided by external force, the ocular surface drainage material cannot shift; the drainage outlet of the ocular surface drainage substance is far away from the conjunctival wound, and the blockage of the tube can not occur. The device has the advantages of small volume, small trauma to eyes, quick healing of eyes, no generation of filtering bubbles and no influence on the appearance of patients.

Drawings

FIG. 1 is a front view of an embodiment of an ocular surface drain according to the present utility model;

FIG. 2 is a perspective view of one embodiment of an ocular surface drainage article according to the present utility model;

FIG. 3 is a side view of an embodiment of an ocular surface drainage article according to the present utility model;

FIG. 4 is a schematic diagram of the stratified flow of an ocular surface drainage in drainage of aqueous humor in accordance with the present utility model;

FIG. 5 is a schematic diagram of the force distribution of the inner wall of an ocular surface drainage article when draining aqueous humor according to the present utility model;

FIG. 6 is an enlarged schematic view of area A of FIG. 3;

FIG. 7 is a schematic flow diagram of an ocular surface drainage during implantation in accordance with the present utility model;

FIG. 8 is another schematic flow diagram of an ocular surface drainage during implantation in accordance with the present utility model;

FIG. 9 is another schematic flow diagram of an ocular surface drainage during implantation in accordance with the present utility model;

FIG. 10 is a front view of an embodiment of an ocular surface drain according to the present utility model;

FIG. 11 is a perspective view of one embodiment of an ocular surface drainage article according to the present utility model;

FIG. 12 is another schematic flow diagram of an ocular surface drainage during implantation in accordance with the present utility model;

FIG. 13 is a front view of an embodiment of an ocular surface drain according to the present utility model;

FIG. 14 is a perspective view of one embodiment of an ocular surface drainage article according to the present utility model;

FIG. 15 is a schematic view of an embodiment of an ocular surface drainage device according to the present utility model in one orientation;

FIG. 16 is another directional exploded view of an embodiment of an ocular surface drainage article according to the present utility model.

Detailed Description

In order that the utility model may be readily understood, a more particular description thereof will be rendered by reference to specific embodiments that are illustrated in the appended drawings. Preferred embodiments of the present utility model are shown in the drawings. This utility model may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this utility model belongs. The terminology used in the description of the utility model herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model. The term "and/or" as used in this specification includes any and all combinations of one or more of the associated listed items.

The utility model provides an ocular surface drainage material, which establishes drainage paths of anterior chamber and ocular surface, aqueous humor is directly drained to the ocular surface through the ocular surface drainage material under the action of anterior chamber pressure, the ocular pressure reducing effect is determined by the ocular surface drainage material, the ocular surface drainage material is not influenced by blockage of an ocular schlemms tube, and the scar drainage effect and appearance are not generated.

The ocular surface drainage can treat glaucoma and dry eye simultaneously. After the aqueous humor is drained to the ocular surface, the aqueous humor is uniformly distributed on the ocular surface through the opening and closing of the eyelid. The tear secretion of the patient with xerophthalmia is insufficient, and the drained aqueous humor can be used as a good supplement.

The ocular surface drainage comprises a drainage inlet 101, a drainage outlet 102 and a drainage channel 1 arranged between the drainage inlet 101 and the drainage outlet 102; the drainage inlet 101 is used for being inserted into an anterior chamber in an eye, and the drainage outlet 102 is used for exposing an eye surface; also included is a fixation portion for engagement with the intraocular tissue, the fixation portion preferably being secured between the conjunctiva and the sclera.

The ocular surface drainage material is inserted into the anterior chamber of an eye in a surgical mode, the fixing part is embedded between the conjunctiva and the sclera, after the ocular surface drainage material is implanted into the eye, the fixing part grows together with tissues in the middle area of the conjunctiva and the sclera, so that the ocular surface drainage material is fixed, and when the eye is extruded or collided by external force, the ocular surface drainage material cannot shift; the drainage outlet 102 exposes the ocular surface.

After the implantation of the ocular surface drainage material is finished, aqueous humor in the anterior chamber of the eye flows to the ocular surface through the drainage inlet 101, the drainage channel 1 and the drainage outlet 102 in sequence, an artificial channel from the anterior chamber to the ocular surface is established in this way, and the aqueous humor flows into the tear film of the eye through the ocular surface drainage material under the action of intraocular pressure, so that dry eye can be treated while glaucoma is treated.

Preferably, as an embodiment of the ocular surface drainage, as shown in fig. 1 to 3, the ocular surface drainage is tubular, the ocular surface drainage comprises a drainage inlet 101 and a drainage outlet 102, and a drainage channel 1 is arranged between the drainage inlet 101 and the drainage outlet 102; the drainage channel 1 comprises a proximal drainage channel 2, a disc-shaped drainage channel 3 and a distal drainage channel 4 which are connected in sequence. The proximal drainage channel 2 and the distal drainage channel 3 are perpendicular to each other and are linear; one end of the disk-shaped drainage channel 3 is connected with the near-end drainage channel 2, and the other end is connected with the far-end drainage channel 4.

It can be seen that the middle part of the drainage channel 1 is wound to form a disc-shaped drainage channel 3, and the disc-shaped drainage channel 3 is in the same plane as the distal drainage channel 4 except for the joint part of the disc-shaped drainage channel 3 and the proximal drainage channel 2. And the disk-shaped drainage channel 3 is used as a fixing part for embedding between conjunctiva and sclera in eyes.

Preferably, the cross section of the drainage channel 1 can be circular (the inner surface and the outer surface are both circular), and the inner surface of the cross section of the drainage channel 1 refers to the cross section for flowing the aqueous humor; the cross section of the drainage channel 1 may also be a hollow rectangle (preferably the inner surface is circular, the outer surface may be square or rectangular), a hollow triangle (preferably the inner surface is circular, the outer surface is regular triangle), a hollow ellipse (preferably the inner surface is circular, the outer surface is elliptical).

In fig. 1 to 3, the cross section of the drainage channel 1 is circular, the inner diameter is in the range of 0.04mm to 0.1mm, and the outer diameter is in the range of 0.25mm to 0.35mm.

Further, when the inner diameter of the drainage channel 1 is small enough, the aqueous humor flows out in a laminar flow state, accords with the Poiseuille equation,

wherein Q is the aqueous humor production rate of the human eye; Δp is the pressure difference between the drainage inlet 101 and the drainage outlet 102, and since the drainage outlet 102 is located on the ocular surface and the pressure is 0, Δp is the intraocular pressure; r is drainageThe radius of the inner channel of channel 1; η is the viscosity coefficient of the aqueous humor; l is the length of the drainage channel 1. Where Q, η are constant, ΔP can be controlled by adjusting r and l. By adjusting r and l different Δp can be obtained, and for early, mid and late glaucoma, different specification ocular surface drainage is used to obtain the desired post-operative ocular pressure.

In one embodiment, the intraocular pressure ΔP may be controlled at 10mmHg when the inner diameter of the drainage channel 1 is 0.08mm and the total length of the drainage channel 1 is 46 mm. The length of the proximal drainage channel 2 is 8mm, the length of the distal drainage channel 3 is 4mm, and the longitudinal height of the disk-shaped drainage channel 3 is 3mm. When the intraocular pressure delta P is more than 10mmHg, aqueous humor flows out to the ocular surface under the action of pressure, so as to play a role in reducing intraocular pressure; when the intraocular pressure delta P is less than or equal to 10mmHg, the aqueous humor stops flowing, and the generation of low intraocular pressure is prevented.

Further, the aqueous humor is a newtonian fluid satisfying the following 4 conditions:

1. the liquid is incompressible;

2. flow is an isothermal process;

3. the liquid cannot slide on the wall surface of the pipeline;

4. the viscosity of the liquid does not change with time.

Referring to fig. 4 and 5, in fig. 4, when the ocular surface drainage material drains aqueous humor, the flow of aqueous humor in the drainage channel 1 is in a laminar state, and accords with the layered flow of newtonian fluid in a simple circular tube. In FIG. 5, it can be seen from the force analysis that the slower the flow velocity of the liquid, the shear stress τ, as the fluid approaches the pipe wall _{The larger} The stress distribution of Newtonian fluid in the simple circular tube is met. And shear stress τ _{Compliance with}

Δp is intraocular pressure, r is the radius of the internal channel of the drainage channel 1, and l is the length of the drainage channel 1.

Thus, when the shear stress τ at the tube wall is greater than the adhesion of the protein or cell, the protein and bacteria will be flushed out of the body and will not adsorb onto the tube wall, causing a blockage or infection.

Preferably, as shown in fig. 6, the drainage inlet 101 has an inclined cross-section, which is 30-45 degrees from the axis 103 of the drainage channel 1, to facilitate penetration of the surgeon from the sclera to the anterior chamber during surgery. Specifically, axis 103 is the axis of proximal drainage channel 2.

Preferably, the drainage inlet 101 may also be of a positive cross-section perpendicular to the axis 103.

Preferably, the drainage outlet 102 has a positive cross-section perpendicular to the axis of the distal drainage channel 4, although the drainage outlet 102 may have an inclined cross-section.

Preferably, in fig. 1 to 3, the overall shape of the disc-shaped drainage channel 3 is similar to a playground runway, and is elliptical with semicircular ends and rectangular middle, so that the total length of the drainage channel 1 can be adjusted by adjusting the length of the rectangle in the middle of the disc-shaped drainage channel 3 on the premise of keeping the length of the proximal drainage channel 2, the length of the distal drainage channel 4 and the longitudinal height of the disc-shaped drainage channel 3 unchanged.

Preferably, the shape of the disk-shaped drainage channel 3 may be circular, square, rectangular, or the like.

Preferably, the ocular surface drainage is made of a hydrophobic material, has a smooth surface and a low friction coefficient. The hydrophobic material may be SIBS, nylon, TPU, PEBAX, PI, PTFE, etc., or a material modified to obtain hydrophobic properties. When the ocular surface drainage material is implanted into eyes, the inner surface of the ocular surface drainage material is smooth, so that the ocular surface drainage material is not easy to adhere to protein and endothelial cells in the body, and the channel through which aqueous humor flows is not easy to block. The external surface of the ocular surface drainage is smooth, and the adhesion of bacteria is poor, which is unfavorable for the propagation of bacteria.

Preferably, the ocular surface drainage is made of a thermoplastic material, or a material that is both hydrophobic and thermoplastic. And winding a guide pipe on a special shaping tool at room temperature, fixing, putting into an oven for heating, taking out, and cooling to obtain the ocular surface drainage material with the shape.

Further, with reference to fig. 7 to 9, the ocular surface drainage is implanted into an eye as follows:

step 1: injecting gunpowder to fix eyeball 100;

step 2: two marker points 3mm apart were drawn using conjunctival mark pen M4 mm below the limbus;

step 3: conjunctival cutting along the straight line trajectory L;

step 4: using a blunt shear to separate the conjunctiva and sclera downward from the incision; creating a conjunctival wound K during the procedure;

step 5: using a 23G blunt needle to insert into a drainage outlet of the ocular surface drainage substance, injecting normal saline until the drainage inlet is observed to have continuous normal saline outflow;

step 6: penetrating the sclera with a 25G needle to establish a subcutaneous tunnel through the anterior chamber;

step 7: the proximal drainage channel 2 of the ocular surface drainage enters the anterior chamber along the subcutaneous tunnel, and the drainage inlet 101 enters the anterior chamber by 2mm; the disk-shaped drainage channel 3 is placed between conjunctiva and sclera, and a drainage outlet 102 at the tail end of the distal drainage channel 4 is left on the surface of the eye;

step 8: the conjunctiva is sutured, completing the operation.

With reference to fig. 7, the distal drainage channel 4 is located on the lower eyelid, there is a larger space for accommodating the distal drainage channel 4, and the drainage outlet 102 at the end of the distal drainage channel 4 is located at the conjunctiva wound K by a distance of about 3mm, so as to avoid the blockage of the secretion at the conjunctiva wound K, the drainage outlet 102 is connected with the tear film, and the drainage aqueous humor can be directly fused into the tear film. It can be seen that the ocular surface drainage has the following characteristics:

first, ocular surface drainage can establish an artificial drainage channel from anterior chamber to ocular surface, drain aqueous humor in eye, reduce intraocular pressure, and treat glaucoma.

Second, ocular surface drainage simultaneously can also drain anterior chamber's liquid to the ocular surface, treats xerophthalmia, and ocular surface drainage disposable implantation, sustainable drainage aqueous humor wets the ocular surface, overcomes the problem that eyedrops treatment xerophthalmia compliance is poor.

Thirdly, the ocular surface drainage can be firmly fixed without falling off or shifting.

Fourth, the drainage outlet 102 of the ocular surface drainage is far away from the conjunctival wound K, and no blockage of the tube occurs.

Fifth, the ocular surface drainage has small volume, small trauma to eyes in the process of surgical implantation and rapid healing of eyes.

Sixth, the eyeball will not produce the filtration bleb after implantation, will not influence the appearance of the patient, the drainage will not be restricted by the function of filtration bleb.

Further, as a second embodiment of the ocular surface drainage, as shown in fig. 8 and 9, the ocular surface drainage is tubular, the ocular surface drainage includes a drainage inlet 101 and a drainage outlet 102, and a drainage channel 1 is disposed between the drainage inlet and the drainage outlet, and the drainage channel 1 is linear.

In this embodiment, the fixation portion is positioned adjacent to the drainage outlet 102 for implantation between the conjunctiva and sclera within the eye. The fixing part comprises two fixing sheets 5 which are symmetrically arranged relative to the drainage channel 1; the fixing piece 5 is provided with the fixing hole 501, the fixing part and the tissue in the eye grow together, the tissue in the eye can pass through the fixing hole 501 in the growth process, the stability of the ocular surface drainage is further improved, and the ocular surface drainage can not shift when the eye is extruded or collided by external force.

Preferably, in this embodiment, the fixing portion and the drainage channel 1 have the following connection modes: the fixing part and the drainage channel 1 are integrally injection molded, a medical suture line, a stainless steel wire, a nickel titanium wire and the like are used as a mandrel, and after the ocular surface drainage object is injection molded, the mandrel is extracted to obtain the outer diameter of the drainage channel 1 which is wanted. Alternatively, the fixing portion is bonded to the drainage channel 1 using a silicone sheet, for example, a liquid silicone is introduced into a mold, the drainage channel 1 is placed, and after the liquid silicone is solidified, the solidified silicone is cut by a cutter or laser to obtain the desired shape of the fixing piece 5.

In one embodiment, the inner diameter of the drainage channel 1 is 0.05mm, the total length of the drainage channel 1 is 7.1mm, and the intraocular pressure can be controlled at 10mmHg. When the intraocular pressure is more than 10mmHg, the aqueous humor flows out to the ocular surface under the pressure action, thereby playing a role in reducing the intraocular pressure; when the intraocular pressure is less than or equal to 10mmHg, the aqueous humor stops flowing, and the generation of low intraocular pressure is prevented.

Further, with reference to fig. 12, the ocular surface drainage is implanted in the eye as follows:

step 1: injecting gunpowder to fix eyeball 100;

step 2: two marker points 3mm apart were drawn using conjunctival mark pen M4 mm below the limbus;

step 3: conjunctival cutting along the straight line trajectory L;

step 4: using a blunt shear to separate the conjunctiva and sclera downward from the incision; creating a conjunctival wound K during the procedure;

step 5: using a 23G blunt needle to insert into a drainage outlet of the ocular surface drainage substance, and injecting normal saline until the continuous normal saline flowing out of the drainage inlet is observed;

step 6: penetrating the sclera with a 25G needle to establish a subcutaneous tunnel through the anterior chamber;

step 7: the drainage inlet of the ocular surface drainage substance enters the anterior chamber for 2mm; the fixed part is placed between conjunctiva and sclera, and the drainage outlet of the ocular surface drainage substance is left on the ocular surface;

step 8: the conjunctiva is sutured, completing the operation.

In this embodiment, according to Poiseuille (Poiseuille) equation, if the required intraocular pressure is small, the disc-type drainage channel 3 in the first embodiment described above may be omitted, and the linear ocular surface drainage is directly used for fixation by the fixing portion.

Further, the same or comparable contents (e.g. the inclined section of the drainage inlet 101, the material of the drainage channel 1, etc.) as those of the first embodiment will not be described herein, and reference is made to the first embodiment.

Further, as a third embodiment of the present utility model, fig. 12 to 15 are shown.

The ocular surface drainage is flat and comprises a drainage inlet 101, a drainage outlet 102 and a drainage channel 1 arranged between the drainage inlet 101 and the drainage outlet 102. The drainage inlet 101 is used for being inserted into an anterior chamber in an eye, and the drainage outlet 102 is used for exposing an eye surface; also included is a fixation portion for coupling with intraocular tissue.

The drainage channel 1 comprises a proximal drainage part 6, a disk-shaped drainage part 7 and a distal drainage part 8, wherein the proximal drainage part 6 and the distal drainage part 8 are mutually perpendicular and are all linear; one end of the disk-shaped drainage part 7 is connected with the near-end drainage part 6, and the other end is connected with the far-end drainage part 8. In the present embodiment, the disk-shaped drainage portion 7 serves as the fixing portion for embedding between the conjunctiva and the sclera in the eye.

Further, as shown in fig. 14 and 15, the ocular surface drainage material is composed of a plurality of layers of polymers, and the plurality of layers of polymers are provided with flow channels.

The multilayer polymers are top layer polymer 9, middle layer polymer 10 and bottom layer polymer 11, respectively. The drainage channel 1 is formed by the common combination of a top layer polymer 9, a middle layer polymer 10 and a bottom layer polymer 10. Each layer of polymer comprises a proximal strip-shaped drainage part 12, a middle disc-shaped connection part 13 and a distal strip-shaped drainage part 14, and the proximal strip-shaped drainage part 13 and the distal strip-shaped drainage part 14 are connected with the middle disc-shaped connection part 13 and are mutually perpendicular.

Further, a first linear runner 15 is provided on the lower surface of the top layer polymer 9 (the surface of the top layer polymer 9 close to the middle layer polymer 10 is the lower surface), and the first linear runner 15 extends from the end of the proximal strip-shaped drainage portion 12 of the top layer polymer 9 toward the middle disc-shaped connection portion 13; the first linear flow channels 15 are channel-shaped flow channels that do not extend through the top layer polymer 9.

Further, a disk-shaped runner 16 and a second linear runner 17 are provided to penetrate through the intermediate layer polymer 10. The disk-shaped flow channel 16 is located in the region of the intermediate disk-shaped connecting portion 13 of the intermediate layer polymer 10, and the second linear flow channel 17 extends from the end of the distal strip-shaped drainage portion 14 of the intermediate layer polymer 10 toward the intermediate disk-shaped connecting portion 13 and communicates with the disk-shaped flow channel 16. After the top layer polymer 9, the middle layer polymer 10 and the bottom layer polymer 11 are compositely molded, the first linear runner 15 is communicated with the disc-shaped runner 16, the upper surface of the middle layer polymer 10 is used for sealing the first linear runner 15, and the lower surface of the top layer polymer 9 and the upper surface of the bottom layer polymer 11 are used for sealing the disc-shaped runner 16 and the second linear runner 17.

Preferably, the multi-layer polymer composite may only include two layers of the top layer polymer 9 and the bottom layer polymer 11, the middle layer polymer 10 is provided with a disc-shaped runner 16 and a second linear runner 17 in a penetrating manner, and the disc-shaped runner 16 and the second linear runner 17 are groove-shaped runners and do not penetrate the bottom layer polymer 11.

Further, the same or comparable contents (e.g. the inclined section of the drainage inlet 101, the material of the drainage channel 1, etc.) as those of the first embodiment will not be described herein, and reference is made to the first embodiment.

It can be seen that the present utility model discloses an ocular surface drainage comprising a drainage inlet, a drainage outlet, and a drainage channel disposed between the drainage inlet and the drainage outlet; the drainage inlet is used for being inserted into an anterior chamber in an eye, and the drainage outlet is used for exposing an eye surface; also included is a fixation portion for coupling with intraocular tissue. In the utility model, the ocular surface drainage material can establish an artificial drainage channel from the anterior chamber to the ocular surface, drain aqueous humor in the eye, reduce intraocular pressure and treat glaucoma; at the same time, the liquid in the anterior chamber can be drained to the ocular surface to treat xerophthalmia. The fixed part grows together with the intraocular tissue, and when the eye is extruded or collided by external force, the ocular surface drainage material cannot shift; the drainage outlet of the ocular surface drainage substance is far away from the conjunctival wound, and the blockage of the tube can not occur. The device has the advantages of small volume, small trauma to eyes, quick healing of eyes, no generation of filtering bubbles and no influence on the appearance of patients.

The foregoing description is only illustrative of the present utility model and is not intended to limit the scope of the utility model, and all equivalent structural changes made by the present utility model and the accompanying drawings, or direct or indirect application in other related technical fields, are included in the scope of the present utility model.

Claims (10)

1. An ocular surface drainage article, characterized in that: comprises a drainage inlet and a drainage outlet, and a drainage channel arranged between the drainage inlet and the drainage outlet; the drainage inlet is used for being inserted into an anterior chamber in an eye, and the drainage outlet is used for exposing an eye surface; also included is a fixation portion for coupling with intraocular tissue.

2. The ocular surface drainage of claim 1, wherein: the middle part of the drainage channel is wound to form a disc-shaped drainage channel which is used as the fixing part and is used for being buried between conjunctiva and sclera in eyes.

3. The ocular surface drainage of claim 1, wherein: the fixing part comprises two fixing sheets which are symmetrically arranged relative to the drainage channel.

4. The ocular surface drainage of claim 1, wherein: the ocular surface drainage material is formed by compounding a plurality of layers of polymers, and a plurality of layers of polymers are provided with flow channels.

5. The ocular surface drainage of claim 1, wherein: the drainage inlet is provided with an inclined section, and an included angle between the inclined section and the axis of the drainage channel is 30-45 degrees.

6. The ocular surface drainage of claim 2, wherein: the cross section of the drainage channel is circular, the inner diameter range of the drainage channel is 0.04 mm-0.1 mm, and the outer diameter range of the drainage channel is 0.25 mm-0.35 mm.

7. The ocular surface drainage of claim 6, wherein: the drainage channel further comprises a proximal drainage channel and a distal drainage channel which are perpendicular to each other, one end of the disc-shaped drainage channel is connected with the proximal drainage channel, and the other end of the disc-shaped drainage channel is connected with the distal drainage channel.

8. The ocular surface drainage of claim 3, wherein: the drainage channel is linear.

9. The ocular surface drainage of claim 4, wherein: the multiple layers of polymers are respectively a top layer polymer, a middle layer polymer and a bottom layer polymer, and the drainage channel is formed by combining the top layer polymer, the middle layer polymer and the bottom layer polymer together.

10. The ocular surface drain according to any one of claims 1-9, wherein: the ocular surface drainage is made of a hydrophobic material.

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