CN204951322U - Prevent extrudeing sclera stab knife - Google Patents

Abstract

The utility model relates to an anti-extrusion sclera puncture knife, which comprises a knife head and a handle. The trapezoid; the handle is thin rod-shaped, one end of which is connected to the center of the rear end of the cutter head. The utility model has reasonable design and convenient use, can effectively prevent the sclera from being squeezed, and creates favorable conditions for ensuring the effects of operations and experiments.

Description

An anti-extrusion scleral puncture knife

technical field

The utility model relates to a medical appliance, in particular to an ophthalmic surgical appliance, in particular to an anti-extrusion sclera puncture knife.

Background technique

To obtain eyeball pathological specimens after enucleation, the integrity of the eyeball must be destroyed, and the scleral window should be opened and soaked in eyeball fixative solution to fully fix it. When the existing scleral puncture knife or tunnel knife is used to open the scleral window, it needs to traverse 3-4mm after the puncture, and then change the direction to continue the puncture. At this time, it is very easy to squeeze the sclera and the corresponding parts of the vitreous body and retina, causing excessive overflow or excessive stretching of the vitreous body, squeezing the vitreous body and retina, and affecting the results of surgery or experiments. Therefore, it is necessary to design a puncture knife that can avoid squeezing the sclera.

Utility model content

The purpose of the utility model is to provide an anti-extrusion sclera puncture knife for the problems encountered in the existing sclera puncture process, which can effectively avoid extrusion of the sclera during the puncture process, and can also improve the efficiency of the operation .

The technical scheme of the utility model is:

An anti-extrusion sclera puncture knife, comprising a knife head and a knife handle, the knife head is elongated, its front edge is tapered, its cross section is V-shaped, and each side of it is the same trapezoid; The knife handle is in the shape of a thin rod, and one end thereof is connected with the rear end of the knife head.

Further, the included angle of the cutting edge at the front end of the cutter head is about 60°.

Further, the side of the cutter head is a right-angled trapezoid with an acute angle of about 30°.

Further, the knife head is made of stainless steel; the knife handle is made of plastic.

The beneficial effects of the utility model:

The utility model has reasonable design and convenient use, can effectively prevent the sclera from being squeezed, and creates favorable conditions for ensuring operation and experiment effects.

Description of drawings

Fig. 1 is a structural representation of the utility model.

Fig. 2 is a top view of the utility model.

detailed description

Below in conjunction with accompanying drawing and embodiment the utility model is described further.

As shown in Figures 1 and 2.

An anti-extrusion sclera puncture knife includes a knife head 1 and a knife handle 2. The cutter head 1 is long and made of stainless steel, its cross section is V-shaped, its front edge 3 is tapered, and the included angle is about 60°, so that when it is inserted into the eyeball, a larger incision can be formed . Each side of the cutter head 1 is the same trapezoid, preferably, the side is a right-angled trapezoid with a length of about 8 mm and an acute angle of about 30°. The knife handle 2 is thin rod-shaped, made of plastic, with a length of about 90 mm, and one end thereof is connected with the rear end of the knife head 1 . Preferably, the knife handle 2 is connected to the center of the rear end of the knife head 1 for easy handling and operation.

During operation, the front end blade portion of the present utility model is punctured perpendicular to the eyeball, and inserted to an adapted depth as required. Then pull out the cutter head to form an easy-to-open incision on the sclera for subsequent operations.

The parts not involved in the utility model are all the same as the prior art or can be realized by adopting the prior art.

Claims (4)

1. an anti-extrusion sclerotic puncture cutter, comprises cutter head and handle of a knife, and it is characterized in that described cutter head is strip, its front end cutting edge is taper, and its cross section is V-arrangement, and its each side is identical trapezoidal; Described handle of a knife is thin bar shape, and its one end is connected with the rear end of described cutter head.

2. anti-extrusion sclerotic puncture cutter according to claim 1, is characterized in that the angle of described cutter head front end cutting edge is 60 °.

3. anti-extrusion sclerotic puncture cutter according to claim 1, it is characterized in that described cutter head side is right-angled trapezium, its acute angle is 30 °.

4. anti-extrusion sclerotic puncture cutter according to claim 1, is characterized in that described cutter head is made up of rustless steel; Described handle of a knife is made of plastics.