WO2002011653A1

WO2002011653A1 - Artificial trabecula support

Info

Publication number: WO2002011653A1
Application number: PCT/CN2001/000866
Authority: WO
Inventors: Ruoyu Yang; Zhongjiang He; Qing He
Original assignee: Ruoyu Yang; Zhongjiang He; Qing He
Priority date: 2000-05-26
Filing date: 2001-05-25
Publication date: 2002-02-14
Also published as: AU2001287526A1; CN2421967Y

Abstract

The present invention relates to an artificial trabecula support which is implanted under the scleral flap in ophthalmic glaucoma filtration operation. The support is ansate as a whole, and comprises a right arm, a left arm, a right hand, a left hand and a link arm. The right and left arms encircle each other, and has a gap between two hands. Using the present artificial trabecula support can improve and enhance drain effect in the filtration operation evidently, avoid fibrous degeneration after treatment, and can be beneficial to make a success of operation.

Description

Artificial trabecular support

TECHNICAL FIELD The present invention relates to an artificial trabecular support that can be implanted under a scleral flap during filtering surgery in ophthalmic glaucoma.

Existing technology Trabeculectomy is currently the most commonly used filtering surgery for glaucoma, and its purpose is to establish a new aqueous humor drainage channel to reduce intraocular pressure. However, the filtration port is often blocked due to fibrosis after surgery, and the intraocular pressure rises again, which causes the operation to fail. Therefore, the ophthalmology community has been exploring new surgical methods and seeking anti-fibrotic measures. Various modified trabeculectomy as described in the "Foreign Medicine" Ophthalmology Division, 1999, Issue 3, pp. 150-160, an intraocular pressure regulating valve with a catheter or so-called artificial trabeculae implanted in the anterior chamber of the eye Silicone, collagen, sodium hyaluronate biofilm, etc. are implanted under the flap. Another example is the application of some anti-fibrotic drugs during surgery or after surgery, mitomycin C, 5-fluorouracil and so on. However, none of the above methods can better prevent the problem of advanced fibrosis, or new complications such as follicular rupture and low intraocular pressure may occur.

Object of the invention

In view of this, how to provide a simple surgical auxiliary device for physiological pressure gradient to restore the aqueous humor circulation to normal during glaucoma filtering surgery, to prevent the rise and recurrence of intraocular pressure, is exactly the motivation of the invention .

The designer of this invention relies on many years of practical experience in various fields of medical device technology research and clinical research, and based on repeated research and demonstration, makes a new design and construction, and finally the invention of this invention.

In view of the shortcomings of the prior art, the object of the present invention is to provide an artificial trabecular stent that can improve and strengthen the drainage effect of filtering surgery, prevent postoperative fibrosis, and improve the success rate of surgery. Applying the technical solution of the present invention

To achieve the above object, the artificial trabecular stent of the present invention is a curved stilt-shaped stent, which is provided with left and right two arms, and the left and right two arms are respectively extended by left and right hands.

The invention is further characterized in that there is a gap between the left and right extended two hands on the left and right arms, and the other ends of the two arms are connected to form a connecting arm; the left and right arms are respectively left and right. The two hands that extend to the right face each other with a gap, and the connecting arm bends toward the gap between the two hands in a W-shape. The back of the connecting arm extends to the left and right, and the gap between the two arms bends. There is one inward left elbow and one right elbow in the middle of the longitudinal direction, which are generally U-shaped or V-shaped; the connecting arms connect the two ends of the left and right arms in a straight line, and one inward in the longitudinal middle of the left and right arms Left elbow and right elbow; arms separated, left and right on one side, four hands extending on each of the left and right arms, facing each other, forming left and right separate curved cymbal structures ; The left and right arms on the left and right arms are respectively connected to the other end of the outstretched arm, and the two arms are embracing to form two spaced independent ring bodies; on the left and right arms, There are gaps in the middle of the left and right hands. The connecting arm is bent toward the gap between the two hands. The left arm, right arm, left hand, right hand, and connecting arm form two front and back "3" shapes opposite to each other. The left and right arms are two hands extending left and right, respectively. The two ends of the two arms are connected through a connecting arm to form a ring. The left and right arms on the left and right arms are bent away from each other, and the connecting arm is bent toward the gap between the two hands.

The perimeter length of the present invention may be 3-4 millimeters, and the diameter of the filaments of each component is 0.5 millimeters, so that it is most suitable for implantation under the scleral flap. The manufacturing material of the present invention can be made of polymethyl methacrylate, thereby ensuring the tissue compatibility of the artificial trabecular stent. Advantages of the invention '

With the artificial trabecular stent of the present invention, after the scleral flap is made according to a specific surgical method during surgery, the artificial trabecular stent is implanted under the scleral flap to form a new gap between it and the scleral bed. For artificial trabeculae. The reconstructed artificial trabeculae can restore the normal physiological pressure gradient of the aqueous humor circulation, which can prevent the complications of low intraocular pressure after surgery, and can keep the filter opening unobstructed for a long time, preventing the increase of intraocular pressure and recurrence. The normal humoral nutritional environment of the lens can reduce the incidence of postoperative cataracts. BRIEF DESCRIPTION OF THE DRAWINGS

The present invention is described in detail below with reference to the drawings:

FIG. 1 is a front view of a first embodiment of an artificial trabecular stent according to the present invention.

FIG. 2 is a front view of a second embodiment of the artificial trabecular support of the present invention.

Fig. 3 is a front view of a third embodiment of the artificial trabecular support of the present invention.

Fig. 4 is a front view of a fourth embodiment of the artificial trabecular support of the present invention.

Fig. 5 is a front view of a fifth embodiment of the artificial trabecular support of the present invention.

FIG. 6 is a front view of a sixth embodiment of the artificial trabecular support of the present invention.

FIG. 7 is a front view of a seventh embodiment of the artificial trabecular support of the present invention.

FIG. 8 is a front view of an eighth embodiment of the artificial trabecular bracket of the present invention.

FIG. 9 is a schematic diagram of a first embodiment of an artificial trabecular stent according to the present invention implanted under a scleral flap. Specific embodiments for carrying out the invention

Figure 1 shows a first embodiment of the artificial trabecular stent according to the present invention. The bracket is provided with left and right arms 1 and 2, and two left and right arms 3 and 4 are respectively extended on the left and right arms. The left arm 1, the right arm 2 and the connecting arm 5 form the main body of the artificial trabecular bracket, which is W-shaped; there is a gap between the left hand 3 and the right hand 4, and the left hand 3, the right hand 4 and the connecting arm 5 form a space. This space just allows the cut-off trabecular area to be elevated.

FIG. 2 shows a second embodiment of the artificial trabecular stent according to the present invention. The left arm 6, the right arm 7, and the connecting arm 10 form the main body of the artificial trabecular stent. Because the direction of the connecting arm 10 faces away from the left hand 8 and the right hand. 9 gap, so this artificial trabecular bracket is V or U-shaped. There is a gap between the left hand 8 and the right hand 9 that just allows the removed trabecular area to be lifted. There is an inward protrusion at the longitudinal middle part of the left and right arms, respectively called left elbow 11 and right elbow 12, and there is also a gap between left elbow 11 and right elbow 12, which can be used as a path for drainage of aqueous humor.

FIG. 3 shows a third embodiment of the artificial trabecular bracket of the present invention. The left arm 31, the right arm 32, and the connecting arm 35 form the main body of the artificial trabecular bracket. The connecting arm 35 is directly connected in a straight line. Each of the longitudinal middle portions has a left elbow 311 and a right elbow 312 protruding inward.

Figure 4 shows a fourth embodiment of the artificial trabecular stent according to the present invention. The left arm 41 and the right arm 42 form the main body of the artificial trabecular stent, the arms are separated, the left and right sides are on one side, and the left arm is on both ends. Two hands 413 and 414 are extended respectively, two hands 423 and 424 are extended on both ends of the right arm, four hands are extended on both ends of the left and right arms, two two Opposite, but not connected, two left and right curved crested structures are formed.

FIG. 5 shows a fifth embodiment of the artificial trabecular stent according to the present invention. The left arm 51 and the right arm 52 constitute the main body of the artificial trabecular stent. The hands 53 and 54 are respectively connected to the other ends of the left and right arms to form two arms embracing to form two spaced independent ring bodies. FIG. 6 shows a sixth embodiment of the artificial trabecular stent according to the present invention. The left arm 61 and the right arm 62 constitute the main body of the artificial trabecular stent, and the left and right arms are extended with left and right hands respectively. 63, 64 are opposite, the connecting arms are bent to the gap between the left and right hands, the left arm 61, the right arm 62, the connecting arm 65 and the left and right hands form two front and back "3" shapes opposite to each other.

FIG. 7 is a seventh embodiment of an artificial trabecular stent according to the present invention. The left arm 71 and the right arm 72 constitute the main body of the artificial trabecular stent. The left and right arms of the left and right arms respectively extend two hands 73 and 73. 74 connections, the other ends of the arms are connected by a connecting arm to form a ring.

FIG. 8 is an eighth embodiment of the artificial trabecular bracket of the present invention, wherein the left arm 81 and the right arm 82 constitute the main body of the artificial trabecular bracket, and the left and right two hands 83 and 83 respectively extend from the left and right arms. 84 is bent back, and the connecting arm 85 is bent toward the gap between the hands.

FIG. 9 is a schematic diagram of a W-shaped artificial trabecular stent implanted under a scleral flap during trabeculectomy in Embodiment 1 of the present invention. After the scleral flap 13 is made and lifted, trabeculectomy 14 and iris undercut 15 are performed, and artificial trabecular stent 16 is implanted so that the gap between the left and right hands is aligned with the trabecular resection area, thus forming the first The artificial trabecular gap 17 and the second artificial trabecular gap 18 are used for drainage of the house water.

The present invention is not limited to the above-mentioned embodiments. Regardless of any changes in its shape or structure, any stent that is implanted into the wall of the eyeball with a curved 襻 -shaped structure falls within the scope of the present invention.

Claims

1. An artificial trabecular stent, which is characterized by a curved sacral stent, which is provided with left and right arms, and two left and right arms are respectively extended by two hands.

2. The artificial trabecular stent according to claim 1, characterized in that there is a gap between the left and right arms of the left and right arms, and the other ends of the arms are connected to form a connection. arm. .

3. The artificial trabecular stent according to claim 1 or 2, characterized in that two left and right arms on the left and right arms are opposed to each other with a gap, and the connecting arm is bent toward the gap between the two hands. , W-shaped.

4. The artificial trabecular stent according to claim 1 or 2, characterized in that the back of the connecting arm protrudes to the left and right and the gap between the two hands is bent, one in each of the longitudinal middle portions of the left and right arms. The inward left and right elbows are generally U-shaped or V-shaped.

5. The artificial trabecular stent according to claim 1 or 2, characterized in that the connecting arm connects the two ends of the left and right arms in a straight line, and each of the left and right arms has an inward left elbow and a right inward elbow.

6. The artificial trabecular stent according to claim 1 or 2, characterized in that the arms are separated, the left and the right are on one side, and the four hands extending from the two ends of the left and right arms are two Oppositely, two left and right curved stirring structures are formed.

7. The artificial trabecular stent according to claim 1 or 2, characterized in that two left and right extended hands on the left and right arms are respectively connected to the other ends of the extended arms, and the two arms are embracing to form Two spaced independent rings.

8. The artificial trabecular stent according to claim 1 or 2, characterized in that the left and right arms of the left and right hands respectively have a gap in the middle, and the connecting arm is bent toward the gap between the two hands. The left arm, right arm, left hand, right hand, and connecting arm form two front and back "3" shapes facing each other.

9. The artificial trabecular stent according to claim 1 or 2, characterized in that two left and right hand extensions on the left and right arms are respectively connected, and the other ends of the two arms are connected through a connecting arm to form A ring.

10. The artificial trabecular stent according to claim 1 or 2, characterized in that the left and right arms of the left and right arms are respectively bent backwards, and the connecting arms are bent toward the gap between the two hands.

11. The artificial trabecular stent according to claim 1 or 2, characterized in that the perimeter length is 3-4 mm, and the diameter of the filaments of each component is 0.5 mm.