CN1018522B - Cornea fixer - Google Patents

Abstract

The present invention is a kind of ophthalmic operating set that is used for fixing corneal film.Existing corneal fixture need be used suture fixed angles diaphragm, complex operation, and fixing not firm, it is time-consuming to require great effort, the easy damaged cornea tissue.The present invention is made of the retainer ring that has the pointed tooth projection, fixed screw, main body and set screw.This apparatus structure is simple, and is in light weight, and immobilizing corneal is easy, firm, and angle of departure diaphragm is very convenient.The present invention can be used for corneal lamellar transplant operation or other experimentation.

Description

Cornea fixer

The invention belongs to a kind of ophthalmic operating set.When implementing ophthalmology lamellar cornea transplant operation, need from the corneal film that exsomatizes, will separate cutting corneal lamellar and plant sheet and it is transplanted on the dried receptor eyeball.Because isolated cornea sheet volume is little thinner again, separates cutting the flaggy inconvenient operation thereon.Therefore, line commonly used clinically is sewn on the surface of gauze ball with corneal film or presss from both sides or with the fixing isolated cornea of homemade ocular prosthesis seat holder with the Fuilless cornea, separate the operation that cuts lamellar cornea (Wang Shoujing etc. " keratoplasty " P63, April in 1980 the 1st edition Xi'an)

The existing fixed device is made of ocular prosthesis seat main body, ocular prosthesis, interior cover, overcoat.During operation the ocular prosthesis seat is fixed on the operating-table, earlier the corneal film epidermis is upwards placed on the ocular prosthesis, locate to put on suture, put in being separately fixed at 3,6,9,12 of edge of cornea, to put tighten the screws outward then, the fixing separation of tightly carrying out lamellar cornea of corneal film can be cut.

Prior art will be passed several sutures when the fixed angles diaphragm, fix corneal film by anchor suture then, and holder need be fixed on the operating-table and operates.Therefore, complex operation, very inconvenient, and also normal fixing not firm or difficult fixing, waste time and energy and the easy damaged cornea tissue.For make the corneal film fixation and also easy to operate simple and direct, quick, prevent to damage this device of the ad hoc meter of cornea tissue " cornea fixer ".

The present invention is made of main body, cornea holder, retainer ring, fixed screw and set screw.The cornea holder is made cylindrical by politef or other materials, long 20～30mm, and diameter 15～20mm, its center is that central aperture communicates with the upper and lower end face, internal diameter 1.5～3mm, its upper and lower end face is circular projection, the radius of curvature of projection is 8～14mm.The main body of holder is cylindrical, high 25～35mm, and external diameter 30～38mm, its top external diameter is less, the top external diameter 18～25mm, position, its underpart external diameter 25～35mm has external screw thread.The main body inner chamber is the cornea bracket, internal diameter 15～20mn suitable for reading, and end opening internal diameter 10～15mn has female thread.Retainer ring is a round ring, go up young, end opening is big, there is the pointed tooth of 4～8 symmetrical distributions inboard suitable for reading, pointed tooth internal diameter 12～16mn, pointed tooth inwardly or outstanding downwards, the lower end of ring is outstanding to periphery.Retainer ring end opening internal diameter size topmost is advisable the outside to be enclosed within main body.Be provided with banking pin or other modes of braking between retainer ring and the main body, make the two can only direct-axis to moving, move and can not do rotation mutually, do rotation with turning of fixed screw and move and damage cornea to prevent retainer ring.Fixed screw is a hollow garden shape, and size suitable for reading can be enclosed within the retainer ring periphery and be pressed in the retainer ring lower end on the projection of periphery.The fixed screw end opening is bigger, and female thread is arranged, and can be screwed on the main body upper external thread, retainer ring is moved down with main body closely contact.Set screw is a Cylinder, and external diameter less about 10～15mn in top makes external screw thread, can be from the end opening precession main body inner chamber cornea bracket of main body.Turn the height that set screw scalable cornea restitope is put, adjust the fixed firm degree of corneal film.Bigger 25～the 35mn of set screw lower outer diameter, both can be hand held easily in operation, can be placed on the platform reposefully again and operate.

The present invention has been owing to designed the retainer ring of garden shape, and there are several pointed tooths the inboard suitable for reading of ring, can directly corneal film is fixed in the cornea holder, saved the step that hangs suture, thereby reached rapid and simple, the effect of fixation, make things convenient for operation significantly, shortened the operating time.

Simultaneously, be provided with banking pin between main body and retainer ring, the rotation of concentric is moved between restriction retainer ring and the main body, but can direct-axis to being inserted in easily or transfering to, thereby the rotation that can not drive retainer ring when tightening fixed screw is moved, and has prevented the damage corneal film.

The setting of set screw has made things convenient for and has regulated the height that the cornea restitope is put, and has guaranteed fixedly degree of tightness appropriateness of corneal film.

Owing to disposed the retainer ring cornea holder different that the pointed tooth internal diameter varies in size with radius of curvature, satisfied the needs of different big or small corneal films, guaranteed to separate that the corneal film that cuts is smooth, damage is light.Thereby improved the quality of separating the flaggy corneal graft.

Fig. 1: the decomposing schematic representation of each parts of cornea fixer.

Fig. 2: the face amount cutaway view of cornea fixer.

Embodiment:

Referring to accompanying drawing 1,2, cornea holder (5) is made diameter 17mm with polytetrafluoroethylmaterial material, 6 of the Cylinders of long 25mm, and central aperture (8) diameter is 2mm, and two ends are garden shape projection, and radius of curvature is respectively 10～12mm.

Retainer body (1) goes up the internal diameter 17mm of cornea bracket (9), cornea bracket (9) end opening internal diameter 11mm.Main body (1) upper end external diameter 21mm, main body major diameter of external thread 30mm, main body (1) external diameter 35mm.Retainer ring (3) is a round ring, and there are (7) 8 of pointed tooths inboard suitable for reading, and pointed end is made 4 retainer rings respectively by pointed tooth different inner diameters 12,13,14,16mm.Retainer ring end opening internal diameter 21mm, end opening is to periphery protuberance external diameter 28mm.Fixed screw (2) is a hollow garden shape, external diameter 35mm, internal diameter 26mm suitable for reading, bottom internal diameter 28.5mm.Set screw (4) is the garden cylindricality, and top external diameter 12mm has external screw thread, lower outer diameter 28mm.Between main body and retainer ring, be provided with banking pin (6).

During use, in the end opening screw of elder generation with the top precession main body (1) of set screw (4).Select for use the cornea holder (5) of suitable radius of curvature to put into the cornea bracket (9) of main body then as required.Again the corneal film epidermis is upwards placed in the cornea holder (5).After this, select for use the retainer ring (3) of suitable pointed tooth internal diameter to be enclosed within the main body upper end, at last fixed screw is enclosed within on the retainer ring, and be screwed on the main body external screw thread, this moment, retainer ring moved down, pointed tooth is securely fixed in corneal film in the cornea holder, and the separation that can carry out corneal film easily this moment such as cuts at operation.

Claims (5)

1, a kind of ophthalmic operating set cornea fixer that is used for fixing corneal film, by main body, the cornea holder, retainer ring, fixed screw, set screw constitutes, it is characterized in that: main body is the garden cylindricality of hollow, inner chamber is the cornea bracket, the cornea holder of garden cylindricality is placed in one, the upper end expose suitable for reading outside, Fixing shrink ring is outside in the main body upper end, the pointed tooth of retainer ring inner rim is pressed in the cornea holder, fixed screw is pressed on the outwards outstanding periphery in retainer ring lower end and its internal thread is spun on the main body outside nut, when fixed screw is rotated down, retainer ring is depressed the pointed tooth that makes retainer ring closely to be contacted with the cornea holder, the main body end opening has the set screw screw-in to enter the cornea bracket, and the tightness between cornea holder upper surface and the retainer ring pointed tooth is regulated in moving up and down of scalable cornea holder.

2, the cornea fixer described in claim 1 is characterized in that: there is 4-8 pointed tooth the inboard suitable for reading of retainer ring, and the internal diameter of pointed tooth is 12-16mm, and the tip of pointed tooth is inside or downward or down inside.

3, the cornea fixer described in claim 1 is characterized in that: be provided with banking pin or other modes of braking between main body and the retainer ring, make the two direct-axis can only be arranged to mobile, and can not rotate mobile mutually.

4, the cornea fixer described in claim 1 is characterized in that: the cornea holder two ends of garden cylindricality are garden shape projection, and the radius of curvature of projection is 10-12mm, and cornea holder center has central aperture to communicate with the upper and lower end face.

5, the cornea fixer described in claim 4 is characterized in that: the cornea holder is made by polytetrafluoroethylmaterial material.

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