CN2324998Y

CN2324998Y - Assist rack for corneal trephine

Info

Publication number: CN2324998Y
Application number: CN 97251463
Authority: CN
Inventors: 张新晨; 曹际新
Original assignee: CENTRAL HOSPITAL OF TAIAN
Current assignee: CENTRAL HOSPITAL OF TAIAN
Priority date: 1997-12-26
Filing date: 1997-12-26
Publication date: 1999-06-23
Anticipated expiration: 2007-12-26

Abstract

The utility model relates to an assist rack for a corneal trephine, comprising a corneal trephine, a negative pressure cutting pillow, a handle and a supporting rack. The purpose of the utility model is to keep the mechanical stability when the corneal trephine is in use, and overcome various faults that owing to unstable operation without arms and continuous ring cut while making implants, corneal endothelium cells are injured, which is easy to result in making an implant which is out of round and lacks a regular shape of a cut surface, etc. Damage to corneal endothelium cells is obviously reduced in the process of making implants. So the corneal implant flap is prepared with regular edges and in standard column shapes, and the implant or implant bed is prepared in a fast, easy and convenient course.

Description

The corneal trephine auxiliary frame

This utility model relates to a kind of ophthalmic operating set, specifically, is a kind of apparatus that is used for corneal graft.

At present in Penetrating Keratoplasty, produce donor and plant the method for sheet and have two, one, produce from whole eyeball and plant sheet, the 2nd, earlier cut corneal film with 2 millimeters limbus of sclera from eyeball, after with its endothelium towards last, be placed on the cutting pillow, drill through from interior surface with hand-held trepan.More than two kinds of methods all need free-hand corneal trephine (Suzhou Medical Instruments Factory produces, the YI162 type) operation of holding.Its shortcoming is, because free-hand operation is unstable and the continuous ring cutting when sheet is planted in making, easily causes the infringement of endothelial cell, and causes planting sheet easily and make that circle and tangent plane shape owe regular.When making plant bed, then be to use corneal trephine directly to drill through, but existing corneal trephine portion of the handle is all very tiny, is not easy to free-hand operation equally from anterior corneal surface.

The purpose of this utility model is intended to make corneal trephine to keep the stability of mechanics in use, makes to produce the cornea donor and plant sheet and be more prone to, and overcomes above-mentioned every shortcoming.

This utility model is realized by following manner: whole apparatus comprises handle 1, support 3 and negative-pressure type cutting pillow 6.Between handle portion and top of the trellis handle spring 2 is arranged, the below cavity is just identical with the Handheld Division of corneal trephine 5, and can both fixedly be become one by knob 4.The diameter of the cylindrical hole on holder part top is consistent with handle, and the circular groove of the bottom center of holder part is divided into two-layer, upper strata and cutting pillow 6 tablings that its diameter is big.Negative-pressure type cutting pillow is made up of the syringe of cutting pillow 6, silica gel tube 10 and band nook closing member spring 8.There is an aperture in cutting pillow central authorities, and periphery has 3～5 apertures.

The advantage of this utility model in clinical practice:

1. can obviously lower the damage of planting corneal endotheliocyte in the sheet process in making;

2. produce and plant sheet or the plant bed process is simple and direct, easy, convenient;

3. the corneal graft neat in edge of producing, and to plant sheet be the standard cylindricality;

Accompanying drawing 1 is the front view of this apparatus, and accompanying drawing 2 is left views, and accompanying drawing 3 is vertical views (linking to each other with syringe) of this apparatus.Among the figure: 1. hands handle; 2. handle spring; 3. support; 4. knob; 5. corneal trephine, (its underpart is hollow loop configuration, and ring wall is poor); 6. cutting is rested the head on; 7. syringe pintle; 8. pintle spring; 9. injector syringe; 10. silica gel tube.

This apparatus implementation and operation is as follows: when sheet is planted in making, produce down the corneal film of band sclera 2 millimeter from eyeball after, the syringe of injecting band nook closing member spring earlier suitably compresses this spring, with the corneal film endothelium towards on place on the cutting pillow, after unclamping the syringe pintle, the negative pressure of formation is solid with the corneal film suction by the diameter of silica gel tube and frame bottom circular groove little lower floor and the aperture on the cutting pillow.Plant the size of sheet then according to desire system, select the corneal trephine of different-diameter, the trepan Handheld Division is put into the cavity of this device handle, with knob both are fixed into one, after handle is put into the cylindrical hole on support top, treat that the trepan tangent plane touches the interior surface of cornea after, gently firmly push downwards with thumb, after the sensation that penetrates whole corneas is arranged, extract handle out, corneal graft is promptly produced and is finished.When making plant bed, according to the size of desire system plant bed, select the corneal trephine of different-diameter, the cavity of this device handle is put in the trepan Handheld Division, with knob both are fixed into one, hand handle then and on the pathological changes cornea, drill through and get final product.

Claims

1. a corneal trephine auxiliary frame comprises corneal trephine and cutting pillow, and it is characterized in that: it also comprises handle and support.

2. corneal trephine auxiliary frame according to claim 1 is characterized in that: its cutting pillow is negative-pressure type, is made up of the syringe of cutting pillow, silica gel tube and band nook closing member spring.

3. corneal trephine auxiliary frame according to claim 2 is characterized in that: there is an aperture in cutting pillow central authorities, and periphery has 3～5 apertures.

4. corneal trephine auxiliary frame according to claim 1 is characterized in that: between a handle portion and a top of the trellis handle spring is arranged.

5. corneal trephine auxiliary frame according to claim 1 is characterized in that: the circular groove of the bottom center of holder part is divided into two-layer, upper strata and cutting pillow tabling that its diameter is big.