CN218899908U

CN218899908U - Positionable 15-degree cornea puncture knife

Info

Publication number: CN218899908U
Application number: CN202222251572.XU
Authority: CN
Inventors: 林培敏; 汤如青; 林尊燕; 陈伟奇; 郑德志; 黄梓敬
Original assignee: Shantou University Chinese University Of Hong Kong And Shantou International Ophthalmology Center
Current assignee: Shantou University Chinese University Of Hong Kong And Shantou International Ophthalmology Center
Priority date: 2022-08-26
Filing date: 2022-08-26
Publication date: 2023-04-25
Anticipated expiration: 2032-08-26

Abstract

A cornea puncture knife capable of being positioned by 15 degrees belongs to an ophthalmic surgical instrument, wherein a positioning mark line is arranged on the surface of a knife body of the cornea puncture knife, two sides of a knife handle are oppositely provided with horizontal limit grooves, and the plane of the horizontal limit grooves is parallel to the plane of the knife body. The beneficial effects of the utility model are as follows: the laser metal mirror polishing technology is adopted, a cutting depth marking line is carved on the surface of the 15-degree puncture knife body, a doctor can further prompt the cutting depth of the operation incision and limit the size of the cornea incision when carrying out cataract operation to manufacture the cornea side incision, thereby improving the standardization and safety of manufacturing the cataract operation side incision and shortening the learning curve of manufacturing the cornea side incision; the handle is provided with the horizontal limiting groove, so that fingers can conveniently hold the handle, and the handle cannot roll during operation.

Description

Positionable 15-degree cornea puncture knife

Technical Field

The utility model belongs to the field of ophthalmic surgical instruments, and particularly relates to a 15-degree cornea puncture knife capable of being positioned.

Background

Making a corneal side incision is one of the important steps in phacoemulsification surgery. Too large cornea side incision can cause situations of anterior chamber water leakage, unstable anterior chamber and the like in operation, and too small side incision can cause difficulty in entering proper length of the nucleus splitting device, influence actions of nucleus splitting and nucleus turning, and are not beneficial to operation safety. The moderate cornea side incision is not only beneficial to the ingress and egress of surgical instruments such as a nucleus splitter, a positioning hook and the like, but also can improve the safety of the cornea incision after operation.

At present, most of the clinical cornea side incisions are made by using disposable metal 15-degree cornea puncture knives, the current 15-degree cornea puncture knives cannot prompt the depth of the incision, and an operator can only evaluate the depth of the puncture knives entering the cornea under a surgical microscope according to clinical experience, so that the size of the cornea side incisions cannot be standardized.

With the progress of medicine, the requirements on the operation quality are increasingly increased, and the innovation of the concept of refractive cataract operation further increases the requirements on the making of the incision of the corneal operation. The excimer laser assisted cataract extraction surgery can finish repeatable and standardized cornea incisions on the cornea through the operability and high accuracy of the excimer laser, so that the homogenization level of the cornea surgical incisions is greatly improved, and the safety is improved. However, excimer-assisted cataract extraction surgery greatly increases the cost of the surgery, limiting its clinical popularity.

Disclosure of Invention

The utility model aims to overcome the defects and provide a 15-degree cornea puncture knife capable of being positioned

The positioning depth of the cutting tool is provided, and the standardization and safety of making the cornea side incision are further improved.

The utility model aims at realizing the following technical scheme: a positionable 15 ° corneal puncture knife, characterized in that: the cutter comprises a cutter handle, a cutter body and a cutter body connecting part for connecting the cutter handle and the cutter body, wherein an included angle between the cutter edge surface of the cutter body and the cutter back surface is 15 degrees, the surface of the cutter body is provided with a positioning mark line, two sides of the cutter handle are provided with horizontal limit grooves relatively, and the plane where the horizontal limit grooves are arranged is parallel to the plane where the cutter body is arranged.

The positioning mark line is positioned on the upper surface and/or the lower surface of the cutter body.

The beneficial effects of the utility model are as follows:

1. by adopting the laser metal mirror polishing technology, a cutting depth marking line is carved on the surface of the 15-degree puncture knife body, and a doctor can further prompt the cutting depth of the operation incision and limit the size of the cornea incision when carrying out cataract operation to manufacture the cornea side incision, thereby improving the standardization and the safety of manufacturing the cataract operation side incision and shortening the learning curve of manufacturing the cornea side incision.

2. The utility model provides a horizontal spacing groove that sets up on the handle of a knife, make things convenient for the finger to hold the handle of a knife, the handle of a knife can not roll during the operation.

Drawings

Fig. 1 is a front view of the present utility model.

Fig. 2 is a side view of the present utility model.

Fig. 3 is an enlarged view of a portion of the present utility model.

Wherein:

the cutter comprises a cutter blade 1, a positioning marking line 2, a cutter body 3, a cutter body connecting part 4, a cutter handle 5 and a horizontal limiting groove 6.

Detailed Description

Examples: as shown in the figure, the cornea puncture knife capable of being positioned by 15 degrees comprises a knife handle 5, a knife body 3 and a knife body connecting part 4 for connecting the knife handle 5 and the knife body 3, wherein the knife handle 5 is made of PVC materials, the length of the knife handle is 12cm, the diameter of the smallest part of the head end is 1.5mm, the diameter of the main body is 5mm, horizontal limit grooves 6 are relatively arranged on two sides of the knife handle 5, the length of each horizontal limit groove is 5cm, the depth is 1mm, the knife body 3 is made of 4Cr13 stainless steel materials and is connected with the knife handle 5 through the knife body connecting part 4, the knife body connecting part 4 is 4mm and is in a cylindrical shape with the diameter of 0.8mm, the knife body 3 and the knife body connecting part 4 are formed by pressing the same steel material, the center line of the knife body connecting part 4 coincides with the center line of the knife handle, the plane of the knife body 3 is parallel to the plane of the horizontal limit grooves 6, the knife body is 11mm, the knife edge 1 is 6mm, the knife back is 8mm, the surface of the knife body is not subjected to laser treatment, the angle between the knife face of the knife body 3 and the knife back is 15 degrees, and the knife edge of the knife body 3 is used along the axial direction of the upper surface and/or the lower surface of the knife body. YAG laser engraves a positioning mark line 2 with the width of 0.1mm at the position 3mm away from the tip of the blade 1 on the surface of the cutter body 3.

When making a cornea incision for cataract surgery, a patient lies on an operating table and is in front of the head-up eyes, and the operating eyes are positioned at the horizontal position. The operation microscope is positioned right above the operation eye, and the projected light is exactly perpendicular to the operation eye. The doctor holds the cornea puncture knife capable of being positioned by 15 degrees, the cornea puncture knife is in a pen holding shape, the thumb holds one side of the knife handle in a horizontal limit groove, the middle finger is fixed in the other side of the knife handle in a horizontal limit groove, the index finger is supported at the rear part of the knife handle, at the moment, the plane of the knife body is parallel to the plane of the thumb, and the whole knife handle is not easy to roll. The knife handle is regulated under the microscope, so that the plane of the knife body is parallel to the plane where the iris is located, and at the moment, the positioning mark line can be a reflective strip due to the vertical irradiation of the microscope light source. The knife is held to position the tip of the knife edge at the transparent limbus, the straight line of the knife edge is directed to the center of the cornea, the knife body is parallel to the iris surface and is fed in the cornea, the knife is horizontally withdrawn from the puncture knife after the outer opening of the cornea incision reaches the positioning mark line, and the cornea side incision is then manufactured.

Claims

1. A positionable 15 ° corneal puncture knife, characterized in that: the cutter comprises a cutter handle, a cutter body and a cutter body connecting part for connecting the cutter handle and the cutter body, wherein an included angle between the cutter edge surface of the cutter body and the cutter back surface is 15 degrees, the surface of the cutter body is provided with a positioning mark line, two sides of the cutter handle are provided with horizontal limit grooves relatively, and the plane where the horizontal limit grooves are arranged is parallel to the plane where the cutter body is arranged.

2. The positionable 15 ° corneal puncture knife according to claim 1, wherein: the positioning mark line is positioned on the upper surface and/or the lower surface of the cutter body.