CN202619978U

CN202619978U - Foldable glaucoma aqueous humor drainage instrument

Info

Publication number: CN202619978U
Application number: CN201220071735.XU
Authority: CN
Inventors: 黄萍; 张纯
Original assignee: Peking University Third Hospital
Current assignee: Peking University Third Hospital
Priority date: 2012-02-29
Filing date: 2012-02-29
Publication date: 2012-12-26
Anticipated expiration: 2022-02-28

Abstract

The utility model provides a foldable glaucoma aqueous humor drainage instrument. The drainage instrument comprises a drainage tube (1), wherein two foldable arc-shaped protection plates (3) made from shape memory materials are fixedly arranged on the outer side wall of a port of the drainage tube (1); an unclosed cavity is formed between the two arc-shaped protection plates (3); and the port of the drainage tube is positioned in the chamber of the unclosed cavity. The foldable glaucoma aqueous humor drainage instrument provided by the utility model has the advantages that owing to the design of the two protection plates outside the outer tube port, the blockage probability of the outer port of the drainage tube is lowered; as the protection plates are foldable, tissue damage is reduced; and the success rate of glaucoma drainage valve implantation is remarkably improved, and postoperative complications are reduced.

Description

A kind of collapsible glaucoma aqueous humor drainage device

Technical field

This utility model relates to the outer device of implanting of a kind of eye, is specially a kind of collapsible glaucoma aqueous humor drainage device.

Background technology

Glaucoma is an irreversibility blinding property oculopathy of ranking the whole world second, also is one of main blinding property oculopathy of China.Glaucoma mainly is because the ophthalmic aqueous humor is discharged intraocular pressure is raise, and finally causes optic atrophy and lose one's sight.For intractable glaucoma, the most frequently used art formula is a glaucoma drain valve implantation both at home and abroad at present.Existing glaucoma drain valve mainly is made up of with a drain dish that is fixedly connected with silica gel tube one end (collar extension) a flexible silica gel tube (being drainage tube).During implantation, earlier the drain dish is planted in eye outside under the conjunctiva, the other end with silica gel tube inserts in ophthalmic again, makes the ophthalmic aqueous humor flow out the back by tissue absorption outside the eye through silica gel tube from the collar extension end, reaches reduction intraocular pressure purpose.Use existing drain valve early stage control intraocular pressure after operation more satisfactory, but generally at 2-3 after week, collar extension usually can be stopped up by ever-increasing scar tissue on every side, thereby it is not smooth that aqueous humor is discharged, and intraocular pressure raises gradually, causes the drain failure at last.

The utility model content

The purpose of this utility model provides a kind of collapsible glaucoma aqueous humor drainage device, and this drainage device can be avoided the obstruction of scar tissue in the collar extension design, thereby improves success rate of operation.

The collapsible glaucoma aqueous humor drainage device that this utility model provided comprises a drainage tube, is fixed with two folding arcuation screening glass of being processed by shape-memory material (3) in the lateral wall of the port (2) of said drainage tube (1); Form a no closed cavities between said two arcuation screening glass (3), a said port (2) of drainage tube (1) is positioned at the cavity of this no closed cavities.This design makes said two arcuation screening glass (3) that the outer mouth of pipe of drainage tube (1) is clipped in wherein, can avoid ever-increasing scar tissue to stop up the mouth of pipe on every side; No closed cavities design can make the unobstructed disperse of effusive aqueous humor open; Said shape-memory material is meant through folding back can flick and return to the solid material of original shape at assigned address, as is used for folded form intraocular lens's silicon gel and acrylic ester; The folding said arcuation screening glass of being processed by said shape-memory material (3) can make two said screening glass (3) under folded state, implant; Reduce operative incision and needed isolating bulbar conjunctiva and Tenon capsule (fascia bulbi sheath tissue); Reduce hemorrhage and damage, operating time is shortened, and the more for a short time scar healing reaction that evokes of damage will be more little; Postoperative drainage pipe possibility of jamming is just more little, improves success rate of operation greatly.If inject viscoelastic agent earlier in the implantation space before implanting said drainage system; Screening glass launches surrounding tissue is produced damage voluntarily in the time of can avoiding implanting; Thereby reduced the generation of cicatrix reaction and post-operative complication; And the absorption in some days of viscoelastic agent needs, viscoelastic agent has the effect of anti-cicatrix simultaneously during this period.

In above-mentioned drainage device; Be provided with a fixing hole (4) that protrudes in said lateral wall on the lateral wall of the said drainage tube (1) outside said no closed cavities cavity; This fixing hole (4) can make operation suture thread pass; Said drainage system is fixed in the shallow-layer sclera, and nearer apart from limbus of corneae because of this fixing hole (4) design makes operation technique simple.

In above-mentioned drainage device, a said port (2) of said drainage tube (1) is positioned at the cavity center of said no closed cavities, to reduce the probability that obstruction takes place the outer mouth of pipe as far as possible.

In above-mentioned drainage device, said fixing hole (4) is 6-10mm with the air line distance of said screening glass (3) stiff end end points, like 8.5mm.

In above-mentioned drainage device, the external diameter of said drainage tube (1) can be 0.5-0.6mm, like 0.6mm; Internal diameter can be 0.25-0.40mm, like 0.3mm.

In above-mentioned drainage device, the length of said drainage tube (1) outside said no closed cavities cavity is 20-30mm, like 25mm.

Use the advantage of the collapsible glaucoma aqueous humor drainage device that this utility model provided to be: the design of the outer two-layer screening glass of the outer mouth of pipe can reduce the obstruction probability of drainage tube collar extension; The collapsible design of screening glass can reduce tissue injury; This utility model can obviously improve the success rate of glaucoma drain valve implantation, reduces the generation of post-operative complication.

Description of drawings

Fig. 1 is the longitudinal sectional drawing of the collapsible glaucoma aqueous humor drainage of this utility model device.

Fig. 2 is the vertical view of the collapsible glaucoma aqueous humor drainage of this utility model device.

Fig. 3 is the side view of the collapsible glaucoma aqueous humor drainage of this utility model device.

Fig. 4 is the side view of folded state for the collapsible glaucoma aqueous humor drainage of this utility model device.

Each labelling is following among the figure: 1 drainage tube, 2 ports, 3 screening glass, 4 fixing holes.

The specific embodiment

Below in conjunction with accompanying drawing this utility model is further specified, but this utility model is not limited to following examples.

The collapsible glaucoma aqueous humor drainage device that this utility model provided comprises folding two the arcuation screening glass 3 processed by shape-memory material on a drainage tube 1 and a port 2 lateral walls that are fixed at this drainage tube 1; Form a no closed cavities between two arcuation screening glass 3, a port 2 of drainage tube 1 is positioned at the cavity of this no closed cavities.On the lateral wall of no closed cavities cavity drainage tube 1, be provided with a fixing hole 4 that protrudes in the lateral wall.

The external diameter of drainage tube 1 is 0.6mm, and internal diameter is 0.3mm; Drainage tube 1 length overall 33mm, wherein the length outside no closed cavities cavity is 25mm, stretching into the intravital length in no closed cavities chamber is 8mm.Two screening glass 3 are consistent with the eyeball surface radian, are oval, and its widest part is 10mm, and strong point is 16mm.Fixing hole 4 is 8.5mm with the air line distance of the stiff end end points of screening glass 3.

In the drainage device of this utility model; Two screening glass 3 can be curled folding around drainage tube 1 bearing of trend; And can launch voluntarily; This screening glass can be processed by materials such as silicon gel and acrylic ester, and its shape is confirmed according to patient's s own situation and actual needs with big I, as is made into 3 kinds of sizes such as big-and-middle trumpet.

The method for implantation of this utility model drainage device can be identical with the glaucoma drainage device implantation of routine; Also can when implanting, only separate a less passage; Earlier curl folding two screening glass of this utility model drainage device around the drainage tube bearing of trend; Implant the implantation space fill up viscoelastic agent in advance, treat that two screening glass launch voluntarily after, dispose by the routine operation method again.

Claims

1. a collapsible glaucoma aqueous humor drainage device comprises a drainage tube (1), it is characterized in that: the lateral wall at the port (2) of said drainage tube (1) is fixed with two folding arcuation screening glass of being processed by shape-memory material (3); Form a no closed cavities between said two arcuation screening glass (3), a said port (2) of drainage tube (1) is positioned at the cavity of this no closed cavities.

2. drainage device according to claim 1 is characterized in that: be provided with a fixing hole (4) that protrudes in said lateral wall on the lateral wall of the said drainage tube (1) outside said no closed cavities cavity.

3. drainage device according to claim 1 and 2 is characterized in that: a said port (2) of said drainage tube (1) is positioned at the cavity center of said no closed cavities.

4. drainage device according to claim 2 is characterized in that: said fixing hole (4) is 6-10mm with the air line distance of said screening glass (3) stiff end end points.

5. drainage device according to claim 1 and 2 is characterized in that: the external diameter of said drainage tube (1) is 0.5-0.6mm.

6. drainage device according to claim 1 and 2 is characterized in that: the internal diameter of said drainage tube (1) is 0.25-0.40mm.

7. drainage device according to claim 1 and 2 is characterized in that: the length of said drainage tube (1) outside said no closed cavities cavity is 20-30mm.