Capsule opening shaping instrument

Abstract

The invention provides an instrument which is applied to cataract surgery and used for performing ostomy on an anterior capsule conveniently and safely. A cutter is a closed circular ring which is made of plastic and good in toughness; tooth-shaped projections are distributed at the bottom end of the circular ring in an equally spaced mode; a supporting ring is a hollow circular ring which is made of plastic and good in toughness; the supporting ring can accommodate the cutter and match with the cutter; the cutter can rotate freely in the supporting ring; the bottom end of the supporting ring is provided with an open area and the width of the open area is about 1.5 mm; the tooth-shaped projections which are arranged at the bottom end of the cutter in an annular shape are located in the open area; the tail end of the supporting ring is connected with a pushing rod through a connecting rod; a user can push the connecting rod into a sleeve from a handle container by pushing the pushing rod and meanwhile the supporting ring can be pushed out of the sleeve through the connecting rod; two holes are formed above the sleeve and the handle container respectively; a pulling rope penetrates the holes; one end of the pulling rope is fixed on one of the tooth-shaped projections of the cutter, the other end of the pulling rope is arranged outside the handle container, and the tail end of the pulling rope is connected with a rope drop; the diameter of the rope drop is larger than that of the hole which is formed above the handle container. The supporting ring is pushed out, the pulling rope is pulled, the cutter cuts through the anterior capsule, and accordingly the ostomy shaping is achieved.

Description

technical field [0001] The invention relates to an instrument used in cataract surgery, which can stoma the anterior capsule conveniently and safely. Background technique [0002] Anterior capsulostomy is a necessary step in cataract surgery (the most widely used extracapsular method), and its success directly determines the success or failure of cataract surgery to a large extent. If the capsular opening is well made, more than half of the cataract surgery will be successful—this is a broad consensus in the industry, which is enough to show the importance of this step. There are three methods currently used: method 1, continuous circular capsulorhexis——use capsulorhexis forceps to tear the capsulorhexis. This requires considerable skill and proficiency, and can only be achieved to a certain level after countless animal experiments and clinical accumulation. It is the most basic assessment content for cataract surgeons at home and abroad. In addition, even the most experie...

AI Technical Summary

Problems solved by technology

Capsular ostomy can also be achieved with these devices, but the capsular opening is incomplete, and a gap is easy to form. When the pressure in the anterior chamber increases, the capsule will rupture and the operation will fail.

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