RU147686U1 - Trowel "Cobra" for keratorefractive surgeries SMILE - Google Patents

Abstract

SMILE keratorefractive spatula, characterized by a sickle-curved working part and the presence of a tip in the form of a flat disk sharpened along the edge, while the disk has a slot that forms a tip.

Description

The device relates to medicine - class A61F 9 / 003-007, in particular, to ophthalmology, and is intended for separation and removal of the lenticular during SMILE keratorefractive operations.

BACKGROUND

In modern corneal refractive surgery, small-incision lenticule extraction (SMILE) technology is becoming increasingly popular. Unlike the popular LASIK excimer laser technology, SMILE is performed using a femtosecond laser, which allows stratification of the cornea tissue at a given depth. In this regard, it became possible to correct ametropia by removing the lenticle formed by the laser in the thickness of the tissue through a small incision. The advantage of SMILE operation, unlike LASIK, is the absence of a circular cut of a superficial flap, which, according to several authors, on the one hand leads to quick visual rehabilitation of the patient and mild corneal syndrome, and on the other hand it prevents the development of secondary keratectasia (Hjortdal J, Vestergaard A, Ivarsen A, Ragunathan S, Asp S. Predictors for the outcome of small-incision lenticule extraction for myopia. J Refract Surg. 2012; 28: 865-871).

At the same time, femtosecond stratification of corneal tissue does not imply its complete separation, since tissue bridges between collagen molecules are preserved after laser irradiation. These bridges must be destroyed manually. (Vestergaard A, Ivarsen A, Asp S, Hjortdal J. Small-incision lenticule extraction for moderate to high myopia: predictability, safety and patient satisfaction. J Cataract Refract Surg. 2012; 38: 2003-2010). To do this, there is a set of tools: a hook for separating tissue at the site of primary corneal access, a straight blunt and pointed spatula to separate the corneal lenticular from adjacent tissue and tweezers to remove it. (Shah R, Shah S, Sengupta S. Results of small-incision lenticule extraction: all-in-one femtosecond laser refractive surgery. J Cataract Refract Surg. 2011; 37: 127-137).

This kit has several disadvantages. When using it, it is necessary to enter several times with different instruments into the formed cavity of the cornea, which significantly increases the risk of infectious complications and the duration of the operation. In addition, the direct spatulas existing in the kit, designed to separate the lenticular from the adjacent tissue, are not convenient for destroying tissue bridges on the periphery of the lenticle, while tearing of the edge of the primary corneal access may occur.

ESSENCE OF A USEFUL MODEL

The technical result of the proposed utility model is a significant reduction in the duration of SMILE surgery and the risk of postoperative complications.

The technical result is achieved by using only one spatula of the proposed design for all stages of the separation of corneal tissue, and removal of the formed lenticular. This spatula has a sickle-curved working part, which, unlike straight spatulas, allows you to separate the lenticular from the underlying tissues with little effort and at a small angle to the edge of the primary corneal access without the risk of tearing it. The tip at the end of the working part in the form of a flat disk sharpened along the edge of the disc makes it easy to enter the spatula into the primary corneal access and further facilitates the separation of the tissue bridges of the lenticular. In addition, the presence of an edge on the disk formed by its slot makes it possible to capture and remove the lenticular without using tweezers.

A utility model is illustrated in FIG. 1-3. In FIG. 1 is a top view of a spatula. In FIG. 2 shows a side view of a spatula. In FIG. 3 is a view A of FIG. 1, - an enlarged image of the tip.

The proposed utility model consists of a handle 1 connected by means of a base 2 and a narrow adapter 3 to the working part 4, which has a tip 5, in the form of a flat sharpened disk with a slot 6. All elements are made entirely of metal. For the convenience of holding the spatula, knurling is performed on the outer surface of the handle 1. The handle 1, due to the presence of the base 2, gradually tapers, forming a cylindrical adapter 3, which gradually becomes flat closer to the beginning of the working part. The working part 4 is located at an angle of 45 degrees to the axis 8, a continuation of the flat part of the adapter. The working part 4 has a double-sided sharpening and a sickle-shaped bend to the right. It ends with a flat sharpened disk with a slot 6 near the working part. Slot 6 forms the tip 9, designed to remove the lenticular.

The author’s experience of more than 50 operations confirmed the high efficiency of the proposed utility model.

Claims (1)

SMILE keratorefractive spatula, characterized by a sickle-curved working part and the presence of a tip in the form of a flat disk sharpened along the edge, while the disk has a slot that forms a tip.

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