CN2579388Y

CN2579388Y - Corneal epithelium valve forming device

Info

Publication number: CN2579388Y
Application number: CN 02286495
Authority: CN
Inventors: 赵广华; 丛林
Original assignee: Individual
Current assignee: Individual
Priority date: 2002-12-03
Filing date: 2002-12-03
Publication date: 2003-10-15
Anticipated expiration: 2012-12-03

Abstract

The utility model relates to a corneal epithelium valve forming device, which belongs to ophthalmology medical appliances and comprises a positioning ring which is provide with a handle and a cornea annular cutting knife, wherein, the handle is fixedly connected with a liquid storage ring of an inverted tapered table board; the positing ring is positioned in the liquid storage ring, is overlapped with the upper end of the liquid storage ring and is concentric and coaxial with the liquid storage ring through at least three radial extended parts which are arranged on the positioning ring and averagely divide the circumference into three parts; simultaneously, the positing ring is hinged with the handle through one radial extended part; the shape of a knife head of the cornea annular cutting knife forms an inverted tapered table board which is matched with the inner wall of the liquid storage ring in a slide mode; the diameter of the cutting edge is little smaller than the inner diameter of the lower end of the liquid storage ring. After the positioning ring is positioned on the cornea, the positioning ring can be lifted. The cornea annular cutting knife is inserted into the liquid storage ring so as to ensure accurate positioning of the corneal epithelium. Solution medicinal liquid which is injected in the liquid storage ring can rapidly infiltrate through an annular shear mark of an epithelial layer of the cornea. The quantity of medicines and the time of solution can be easily controlled. The utility model provides a safe, effective, convenient, specific and applicable surgical instrument for corneal epithelium forming operations and skin flap lower excimer laser in situ grinding and inlaying operations.

Description

The corneal epithelial flap former

Affiliated technical field

This utility model relates to a kind of ophthalmic medical instrument, particularly a kind of in the near-sighted operation of treatment---excimer laser original position mill is inlayed art under the corneal epithelial flap---corneal epithelial flap former of middle application.

Background technology

At present, excimer laser art treatment myopia has become the first-selected art formula that vast near-sighted crowd removes glasses.Its principle is the ultraviolet cold laser by wavelength 193nm, inlays out a concave surface at cornea hypothallus mill, adjusts imaging focal length, with myopia correction.Fig. 1 is a cornea tissue section enlarged diagram.As shown in Figure 1, cornea tissue is made up of hypothallus c, descemet's membrane d, the endodermis e five-layer structure of epithelial layer a, the bowman's lamina b of thick about 50-60 μ m, thick about 500 μ m, and epithelial layer is about 1: 9 with the ratio of hypothallus thickness.

Excimer laser art treatment myopia mainly contains three kinds of methods.First kind is called for short PRK, be with corneal epithelium draw together remove after, directly on corneal stroma, launch laser, postoperative makes wound healing by the regeneration of corneal epithelium.The method patient's pain, shed tears, therapeutic domain is narrow, is easy to generate complication such as the corneal opacity, is close to superseded.Second kind is called for short LASIK (excimer laser original position mill edge art under the cornea flap), be to make a band base of a fruit cornea flap that comprises the thick 130 μ m---160 μ m of corneal epithelium, bowman's lamina, part hypothallus with a kind of special flaggy cutter, and it is opened, on the hypothallus under the cornea flap, launch laser, again cornea flap is resetted behind the mill edge.The method patient is pain not, and vision restoration is very fast, but myope higher for near-sighted degree, that cornea is thin because of post-operative cornea hypothallus wear down, easily causes the post-operative cornea expansion, has a strong impact on vision.In addition, special flaggy cutter operation easier is very high, easily brings various operation risk, and the operative doctor mental pressure is big, and the costing an arm and a leg of cutter, ten thousand yuans of the about 40-50 of unit price, operation cost height.The third is called for short LASEK (excimer laser original position mill edge art under the corneal epithelial flap), is to make the thick only corneal epithelial flap of 60 μ m with the cornea annular cutter, and it is opened, and launches laser under epithelial flap, epithelial flap is resetted behind the mill edge again.The method therapeutic domain is wide, and is safe, the various danger of having avoided the flaggy cutter to bring, and myope that, cornea little for eyeball is thin, eye socket is dark or athlete, work high above the ground personnel are suitable especially, and post-operative recovery is fast, and cost is low, and the trend that replaces LASIK is arranged.But this method does not have simple, the practical special equipment of a cover so far, and ophthalmologists use some existing apparatuses temporarily and undergo surgery.For example use the annular cutter that existing corneal transplant trephine is used as making epithelial flap, the locating ring of using the band handle to be the annular cutter location.Shaping for corneal epithelial flap, usually need to be with the locating ring of handle on cornea, to carry out the pupil center location with one earlier, take away locating ring then, make the cornea annular cutter with corneal transplant trephine, with sensation its cutting edge centering location, face of cylinder is located on cornea by rule of thumb, the epithelial layer of ring cutting cornea, and by on the ring cutting face, injecting medicinal liquid in the trepan, with the power that is connected between loosen corneal epithelium and the bowman's lamina, be convenient to corneal epithelium is separated to the base of a fruit of reservation, thereby produce corneal epithelial flap with the epithelium scraper.Carry out that the subject matter that above-mentioned operation exists has two: 1, be fixed with " ten " font coordinate in the locating ring with existing apparatus, put annular cutter after must taking away locating ring, pupil center's positioning accuracy is difficult to guarantee that success rate of operation is affected; 2, annular cutter limits the medicinal liquid infiltration of loosening and cuts ring, influences the effect of loosening, and dosage and the time of loosening are difficult to grasp, and influence is performed the operation and carried out smoothly.

Summary of the invention

Technical problem to be solved in the utility model is to overcome the shortcoming of existing apparatus, for excimer laser original position mill edge art under the execution corneal epithelial flap provides a kind of effective, convenient, special-purpose corneal epithelial flap former.

The technical scheme that its technical problem that solves this utility model adopts is as follows: a kind of corneal epithelial flap former, comprise locating ring and the cornea annular cutter of being with handle, the centralized positioning coordinate that has " ten " font in the locating ring, cornea annular cutting tool has cylindrical cutter body and cutter head, the cutter head lower end is a cutting edge, the storage pendular ring that it is characterized in that the fixedly connected back taper table top of handle, locating ring be arranged in storage pendular ring and the extend radially part by at least three circumference in equal parts on it with storage pendular ring upper end overlaid with storage pendular ring concentric co-axial, simultaneously, locating ring is hinged with handle by an one extend radially part, the cutter head of cornea annular cutter is shaped as and stores the back taper table top that the pendular ring inwall is slidingly matched, and its cutting edge diameter is slightly smaller than storage pendular ring bottom diameter.

The beneficial effects of the utility model are as follows: locating ring and handle are hinged, with its on the cornea location after, can locating ring be started by last group coordinate extended end, and handle and storage pendular ring keep positioning states motionless, the cornea annular cutter is inserted the storage pendular ring, because cutter head is slidingly matched with storage pendular ring inwall, therefore guaranteed the concentric co-axial of cutter head with the storage pendular ring, solved the accurate orientation problem of cornea annular cutter, again because the cutter edge diameter is slightly smaller than storage pendular ring bottom diameter, its annular cut channel is also less than storage pendular ring lower end inwall, therefore can be behind the cornea annular cutter ring cutting corneal epithelium by taking out in the storage pendular ring, directly in the storage pendular ring, inject the medicinal liquid of loosening, medicinal liquid can be infiltrated by annular cut channel place rapidly, loosen the power that is connected between corneal epithelium and the bowman's lamina, dosage and the time of loosening are easy to grasp, and have overcome second difficult problem.Utilize this utility model that corneal epithelial flap is shaped, excimer laser original position mill edge art provides a kind of effective, convenient, special operating theater instruments that is suitable under the corneal epithelial flap in order to implement.

Description of drawings

Fig. 1 is a cornea tissue section enlarged diagram.

Fig. 2 is storage pendular ring, the locating ring structure sketch map of band handle in this utility model.

Fig. 3 is the vertical view of Fig. 1.

Fig. 4 is this utility model overall structure user mode sketch map.

Label among Fig. 2 to Fig. 3 is: the 1-handle, and the 2-locating ring, 3-stores pendular ring, 4-articulated elements, 5-cornea annular cutter, 51-cutter hub, the watch window on the 511-cutter hub, 52-cutter head, 521-cutting edge.

The specific embodiment

With reference to the accompanying drawings and in conjunction with the embodiments this utility model is described in detail.

As Fig. 2, Fig. 3 and shown in Figure 4, the composition of this utility model corneal epithelial flap former comprises the locating ring 2 of being with handle 1, cornea annular cutter 5, the centralized positioning coordinate that has " ten " font in the locating ring 1, cornea annular cutter 5 has cylindrical cutter body 51 and cutter head 52, the cutter head lower end is a cutting edge 521, the storage pendular ring 3 of handle 1 a fixedly connected back taper table top, locating ring 2 be arranged in storage pendular ring 3 and the extend radially part by its coordinate with storage pendular ring 3 upper end overlaids with storage pendular ring concentric co-axial, simultaneously, locating ring 2 is hinged by its coordinate one end prolongation and handle 1,4 signal articulated elements among the figure, the cutter head 52 of cornea annular cutter 5 is shaped as and stores the back taper table top that pendular ring 3 inwalls are slidingly matched, and its lower end cutting edge 521 diameters are slightly smaller than storage pendular ring bottom diameter.

In embodiment as shown in the figure, for easily being clamped by apparatus, raises by locating ring, in order to make the cornea annular cutter be more convenient for operating, the further feature of this utility model is: 1, an end of locating ring abscissa extend radially part is reclinate hook-shaped; 2, has watch window 511 on the cornea annular cutter cutter hub cylindrical side.

Claims

1, the corneal epithelial flap former, comprise locating ring and the cornea annular cutter of being with handle, the centralized positioning coordinate that has " ten " font in the locating ring, cornea annular cutting tool has cylindrical cutter body and cutter head, the cutter head lower end is a cutting edge, the storage pendular ring that it is characterized in that the fixedly connected back taper table top of handle, locating ring be arranged in storage pendular ring and the extend radially part by at least three circumference in equal parts on it with storage pendular ring upper end overlaid with storage pendular ring concentric co-axial, simultaneously, locating ring is hinged with handle by an one extend radially part, the cutter head of cornea annular cutter is shaped as and stores the back taper table top that the pendular ring inwall is slidingly matched, and its cutting edge diameter is slightly smaller than storage pendular ring bottom diameter.

2, corneal epithelial flap former according to claim 1, it is characterized in that locating ring be arranged in storage pendular ring and the part of the extend radially by its coordinate with storage pendular ring upper end overlaid with storage pendular ring concentric co-axial, simultaneously, locating ring is hinged by its coordinate one end prolongation and handle.

3, corneal epithelial flap former according to claim 2 is characterized in that an end of locating ring abscissa extend radially part is reclinate hook-shaped.

4,, it is characterized in that having watch window on the cornea annular cutter cutter hub cylindrical side according to claim 1 or 2 or 3 described corneal epithelial flap formers.