CN2044479U

CN2044479U - Cornea puncher

Info

Publication number: CN2044479U
Application number: CN 88205809
Authority: CN
Inventors: 吴志谷
Original assignee: Hospital No304 Chinese Pla
Current assignee: Hospital No304 Chinese Pla
Priority date: 1988-05-23
Filing date: 1988-05-23
Publication date: 1989-09-20

Abstract

The utility model discloses a surgical device used for the ophthalmic surgery to cut the ex vivo eyeball cornea. The prior cornea die-cut device has infirm fixing of a cutter edge and a cutter handle and the sliding contact area of the cutter handle and a cutter frame is small and thus the die-cut cornea edge is caused irregular with large damage to influence the transplantation and survival effect. The upper portion of the cutter of the utility model is made into a cylindrical cutter handle plugged into the circular groove on the lower end of a cutter connecting rod in tight connection and also enabling the supporting rod legs on the both ends of the cutter frame to be in slide connection with the supporting rod cylinder of a base. The cornea concave plates with various curvature radius are also arranged in order to choose in order to improve the die-cut quality. The utility model can be used for the experimental study and the ophthalmic surgery of cornea transplantation.

Description

Cornea puncher

This utility model is a kind of surgical operating instrument that is used to cut the in-vitro eyeball cornea.In the cornea transplant operation, need the big or small on demand garden shape thin slice that is cut into neat in edge of donor's cornea.Existing cornea blanking units (U.S, Pat, 4,182,666) mainly is partly to be made of pedestal, pallet, leading truck, handle of a knife sleeve, blade etc.Push handle of a knife sleeve when upper end, the handle of a knife sleeve to lower slider, makes the garden shape blade cutting that is connected handle of a knife sleeve lower end place cornea on the pallet concave surface along the hole, garden at leading truck center, can obtain garden shape cornea tissue and use for transplanting.Existing cornea blanking units, because the lateral contact surface of handle of a knife sleeve and hole, garden, leading truck center is little, the handle of a knife sleeve is swung easily when pushing downwards.Simultaneously, blade is connected also built on the sand with handle of a knife is telescopic, and when firmly pushing the handle of a knife sleeve, the easy run-off the straight of blade makes the edge of cornea cutting irregular.Also, can not be fit to the smooth placement of different curvature radius cornea, edge of cornea fold also takes place during cutting easily, cause the damage that the edge of cornea cut place is bigger, influence transplantation effect because pallet concave curvature radius is single.And part is more in addition for existing blanking units, particularly handle of a knife sleeve, is difficult for disinfecting totally, pollutes the survival that donor's cornea influences corneal transplant easily.

The purpose of this utility model is a kind of improved cornea die cutter of design, strengthens the steadiness that the cutting knife handle of a knife connects; Stability when increasing die-cut the slip; Increase the recessed dish of cornea of different curvature radius, and make this die cutter cleaning and sterilizing that is easy to simple in structure improve quality and the transplantation effect that cuts cornea.Its structure is: there is the garden shape groove of a depression at the pedestal center, wherein places the recessed dish of cornea.The recessed dish of cornea is that white pvc material is made the garden cylindricality, and its work surface is spherical concave surface, and the radius of curvature of concave surface can be selected in the 7.5-9.0mm scope, and there is an aperture in recessed dish central authorities.The pedestal lateral surface has three equidistant apertures, communicate with the garden shape groove at pedestal center, in screw is arranged in order to adjust and the position of the recessed dish of immobilizing corneal.It is the garden tubular that there are two pole tubes of fixing the guiding usefulness on it on the both sides of pedestal, hollow.Two pole lower limbs at knife rest two ends are the garden cylindricality, and from the insertion suitable for reading of pole tube wherein, the pole lower limb can upper and lowerly slide with tight contact of pole tube.Cutter connecting rod is the garden cylindricality, and its upper end is fixed on knife rest central authorities by fixed screw, and there is garden shape sulculus in its lower surface central authorities.The cutting knife upper end is that garden cylindricality handle of a knife inserts in the garden shape sulculus of cutter connecting rod lower end, closely connects, and the cutting knife lower end is a hollow garden shape blade, and the side has fenestella.There is a garden cylindricality needle handle centering pin upper end, can insert in the shape sulculus of garden, cutter connecting rod lower end, and the centering pin lower end is a taper, and needle point is downward.This apparatus is furnished with the blade diameter in the 6.0-10.0mm scope, selectable several cutting knifes, and spherical female curvature of face radius is in the 7.5-9.0mm scope, the recessed dish of cornea of different big small curvature radius several.

Fig. 1: be front perspective view of the present utility model.

Fig. 2: the cutaway view that is 2-2 cross section among Fig. 1.

Fig. 3: be centering pin cutaway view in this utility model.

Embodiment:

When using this device, earlier cutter connecting rod (3) is connected (1) on the knife rest referring to accompanying drawing 1,2,3, tightens with hold-down nut; And at cutter connecting rod lower end insertion centering pin (12), the recessed dish of cornea (10) of the selected radius of curvature that is fit to is put into the groove (8) of pedestal (6) then, the pole lower limb (4) of knife rest is inserted the pole tube interior (7) of pedestal, downslide knife rest, the recessed dish of adjustment cornea position, make the central small hole (11) of the recessed dish of needle point (13) aligning cornea of centering pin, tighten three hold-down screws (9), at this moment the cutter connecting rod of knife rest, cutting knife and recessed dish are in concentric shafts.

Then, extract knife rest, unload centering pin, change cornea cutting knife (5), in recessed dish device donor's cornea sheet make endothelium towards on.The knife rest that cutting knife will be housed again inserts in the pole tube, and the downslide knife rest makes cutoff edge to the corneal endothelium face, and both hands buttress knife rest and firmly press down and can cut corneal film.At this moment, cut cornea outer ring is stayed on the cutting knife, downcuts corneal film and then stays in the recessed dish, and the corneal film that can obtain neat in edge is used for transplanting.

Claims

1, a kind of ophthalmic operating set that is used to cut the in-vitro eyeball cornea that constitutes by pedestal, the recessed dish of cornea, knife rest, cutting knife.

It is characterized in that: two pole tubes are being fixed on the pedestal both sides, and there are two pole lower limbs on the knife rest both sides, and the pole lower limb can insert in the pole tube and slide up and down; The knife rest center fixed cutter connecting rod, also has centering pin.

2, the pole tube described in claim 1 is characterized by the garden tubular, and the pole lower limb is the garden cylindricality.

3, the cutter connecting rod described in claim 1 is characterized by the garden cylindrical upper end and is fixed in the middle of the knife rest, and there is garden shape sulculus in lower surface central authorities.

4, cutting knife described in claim 1 is characterized by the upper end and is the handle of a knife of garden cylindricality, can insert in the garden shape sulculus of cutter connecting rod lower surface; The lower end is a hollow garden shape blade, and the side has fenestella.The blade diameter can be selected in the 6.0-10.0mm scope.

5, the recessed dish of cornea described in claim 1, the radius of curvature that it is characterized by spherical concave surface are in the scope of 7.5-9.0mm, and it is standby to make the different recessed dish of several corneas of radius of curvature.

6, the centering pin described in claim 1 is characterized by the upper end and can insert in the garden shape sulculus of cutter connecting rod lower end for the garden cylindricality, is condensed to taper down, and needle point is downward.

7, the pedestal described in claim 1, it is characterized by lateral surface has three equidistant apertures to lead in the garden shape groove at pedestal center, and screw is arranged in the aperture, with the position of adjusting and the recessed dish of immobilizing corneal.