CN212281873U

CN212281873U - Novel cornea matrix interlayer separator

Info

Publication number: CN212281873U
Application number: CN201922300643.9U
Authority: CN
Inventors: 李应安祺; 李刚
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-12-20
Filing date: 2019-12-20
Publication date: 2021-01-05
Anticipated expiration: 2029-12-20

Abstract

The utility model belongs to the technical field of medical instrument, especially a novel cornea stroma layer separator, the separator comprises work portion and handle two parts, and work portion and handle are coaxial continuous. The working part consists of two parts, the head end is cylindrical and about 1-2 mm long, the rear part is vertical oval in cross section, and the side surface is provided with a bulge. The long axis of the vertical ellipse gradually increases from the head end direction to the connecting part of the handle from 0.2mm to 2 mm. The handle part which is consistent with the protruding direction of the working part is provided with a rectangular plane for prompting the protruding direction. The invention can not only safely separate corneal interlamination, but also ensure smooth interlamination separation and improve the operation efficiency.

Description

Novel cornea matrix interlayer separator

Technical Field

The utility model belongs to the technical field of medical equipment, relates to the microsurgical instrument related to the corneal surgery, especially a separator between corneal stroma layer when being used for femto second laser operation.

Background

The corneal stroma layer accounts for 90% of the corneal thickness and is composed mainly of collagen fibers stacked closely one on top of another. The layered structure of the stromal layer allows the cornea to be separated relatively easily during the interlaminar dissection procedure. Healing of the corneal stroma faults can cause varying degrees of haze, affecting the corneal transparency and diopter, and thus visual impairment. Therefore, whether the corneal stroma can be smoothly and smoothly separated without dislocation is an important link of corneal surgery. Particularly for the femtosecond laser micro-Incision intrastromal lens Extraction (SMILE), after the femtosecond laser finishes the corneal stromal lens cutting, a Small amount of collagen fibers of the stromal lens are still connected with stroma at other parts, and if the corneal stromal lens is roughly pulled apart by blunt force, the corneal interlayer is turbid, and the visual imaging quality of the cornea is influenced. There are two types of methods for the interlayer separation of the corneal stroma. One is that a very sharp blade is carefully cut under a microscope, which has the advantage of smooth cutting surface, but in actual operation, layers are often split due to the smoothness of hands. Another type uses potential dissection of the corneal stroma, and uses blunt-shaped instruments to simply and roughly separate the layers with a blunt force, which has the advantage of not easily separating the layers but can affect the flatness of the corneal stroma layers.

SUMMERY OF THE UTILITY MODEL

The utility model aims at solving the defect of the existing corneal interlayer separation, providing a separator which can smoothly separate corneal stroma layers and can ensure no split layer, and improving the safety factor and quality of the operation.

In order to achieve the above object, the technical solution of the present invention is as follows:

the utility model discloses cornea stroma interlaminar separator comprises work portion and handle two parts. The working part is coaxially connected with the handle, the working part consists of two parts, the head end is cylindrical and about 1-2 mm long, the cross section of the working part is vertical and elliptical, and the side face of the working part is provided with a protrusion. The long axis of the vertical ellipse gradually increases from the head end direction to the connecting part with the handle from 0.2mm to 2 mm. The working part has a certain radian. The handle part and the protruding direction of the working part are consistent and provided with a rectangular plane for prompting the protruding direction.

The side surface of the vertical elliptic part of the working part can be blunt and sharp. The side surface bulge of the vertical oval part of the working part can be arranged on both sides, or on one side, and the other side is oval. If both sides are provided, the corresponding two sides of the handle are provided with a platform. If only one side is provided with the bulge, the corresponding side is provided with the platform. The working part is coaxially connected with the handle, the working part and the handle are bent in an arc shape, the included angle can be adjusted according to personal preference, and the recommended angle is 90-100 degrees.

The surface of the handle is provided with the grid lines to play a role in skid resistance, the small platform corresponding to the protrusions is smooth and rectangular, the long axis of the small platform is consistent with the long axis of the handle, the length of the small platform is 2-3 mm, and the length of the short axis of the small platform is 1-2 mm.

Preferably, the working portion has a cylindrical head end with a length of about 1mm, all corners are polished smooth and are integrally continuous with the vertical oval portion.

Preferably, the working portion gradually becomes thicker from the head end to the tail end, the diameter of the head end is 0.2mm, and the diameter of the tail end is 1 mm.

The two ends of the separator handle can be respectively provided with a working part, or only one end of the separator handle can be provided with the working part. Or one end of the handle can be a working part, the other end of the handle can be a small hook, the length of the small hook is about 2-3 mm, the diameter of the small hook is about 0.2mm, and the included angle between the small hook and the handle is 120 degrees.

The utility model has the advantages that: 1. all edges and corners of the working part head end of the separator are polished smoothly, the diameter of the working part is 0.2 mm-2 mm, the head end of the working part can be prevented from being layered, two layers of matrixes can be propped open by using certain thickness of the working part, and the separator can be guaranteed to move between the same layers. 2. The side surface bulge of the separator can cut off the connected filamentous fibers between the two layers of substrates which are spread by the working part, and the filamentous fibers are not pulled off by blunt force, so that the interface of the separated substrate layers is ensured to be smooth. 3. When the separator separates the matrix layers, the thickness of the separator is utilized to prop open the two layers of matrixes, and the lateral bulges are utilized to cut off the fibers blocked in the process of advancing, so that the operation speed is higher than that of pure blunt separation and the effect is good.

Drawings

FIG. 1 is a schematic structural diagram of a corneal stroma layer separator of the present invention;

FIG. 2 is an enlarged view of the working portion of FIG. 1;

FIG. 3 is an enlarged cross-sectional view of the head end of the working portion of FIG. 1;

figure 4 is an enlarged cross-sectional cut-away view of the rear portion of the working portion of figure 1 with a double-sided projection.

Detailed Description

The following description of the preferred embodiments of the present invention with reference to the accompanying drawings is illustrative only and is not intended to limit the scope of the present invention.

As shown in figure 1, the utility model discloses a cornea matrix interlayer separator comprises handle 01 and working portion 03 two parts, and handle 01 and working portion 03 are coaxial and are linked together. The working portion 03 has a certain curvature. As shown in fig. 2, 3 and 4, the working portion 03 is composed of two parts, a head end 31 is cylindrical, about 1mm long and 0.2mm in diameter, and a rear portion 32 is vertically elliptical in cross section and has a protrusion on the side surface. The long axis of the vertical ellipse is gradually thickened from 0.2mm to 1mm from the direction of the head end 31 to the connecting part of the handle 01. As shown in fig. 4, the lateral projections of the oblong portion 32 of the working portion 03 are present on both sides, the lateral projections being blunt. A platform 02 is arranged on both sides of the handle 01 corresponding to the protrusion of the working part 03. The long axis is consistent with the long axis of the handle 01, the length is 3mm, and the short axis is 1 mm. The working part 03 and the handle 01 are bent in an arc shape, and the included angle is 90 degrees. The surface of the handle 01 is provided with the grid lines to play a role of skid resistance, and the small platform 02 corresponding to the bulges is smooth. The other end of the handle 01 is provided with a small hook 04, the length of the small hook is 2mm, the diameter of the small hook is 0.1mm, and the included angle between the small hook and the handle is 120 degrees.

The utility model discloses the theory of operation of cornea stroma interlaminar separator is: when separating the stroma layer, utilize the work portion blunt nature to separate between the stroma layer of cornea earlier, the position that two-layer stroma links to each other about the divided is a triangle-shaped contained angle, the position stroma fibre of cornea at the contained angle still filiform links to each other, remove separator work portion, the arch of work portion side can utilize certain sharp strength to cut off filiform continuous stroma fibre this moment, just so than the separation interface that simple blunt nature was torn and is formed smoother more smoothly, postoperative cornea healing is more transparent, the security and the effect of operation have been improved greatly.

Claims

1. A novel corneal stroma interlaminar separator, characterized by: the separator comprises work portion and handle two parts, and work portion and handle are coaxial continuous, and the work portion comprises two parts, and the head end is cylindric, and is about 1 ~ 2mm long, is the cross-section thereafter and is vertical ellipse, and the side has the arch, and vertical ellipse major axis increases from head end direction to gradually thickening from 0.2mm to 2mm with the handle connecting portion, and the handle position is unanimous with the protruding direction of work portion has a rectangle plane, the bellied direction of suggestion.

2. A novel corneal stromal interlayer separator according to claim 1, wherein: the side surface of the vertical oval part of the working part can be provided with bulges at both sides, also can be provided with bulges at one side, the other side is oval, if both sides are provided, both sides corresponding to the handle are provided with a platform, if only one side is provided with the bulges, one side corresponding to the platform is provided with the platform.

3. A novel corneal stromal interlayer separator according to claim 1, wherein: the side surface of the vertical elliptic part of the working part can be blunt and sharp.

4. A novel corneal stromal interlayer separator according to claim 1, wherein: the head end is smooth, rounded and integrally continuous with the oblong portion.

5. A novel corneal stromal interlayer separator according to claim 1, wherein: the working part is coaxially connected with the handle, the working part and the handle are bent in an arc shape, and the included angle is 90-100 degrees.

6. A novel corneal stromal interlayer separator according to claim 1, wherein: the working part gradually becomes thicker from the head end to the tail end, the diameter of the head end is 0.2mm, and the diameter of the tail end is 1 mm.

7. A novel corneal stromal interlayer separator according to claim 1, wherein: the surface of the handle is provided with the grid lines to play a role in skid resistance, the small platform corresponding to the protrusions is smooth and rectangular, the long axis of the small platform is consistent with the long axis of the handle, the length of the small platform is 2-3 mm, and the length of the short axis of the small platform is 1-2 mm.

8. A novel corneal stromal interlayer separator according to claim 1, wherein: the two ends of the handle can be respectively provided with a working part, only one end of the handle can be provided with the working part, the other end of the handle is provided with the small hook, the length of the small hook is about 2-3 mm, the diameter of the small hook is about 0.2mm, and the included angle between the small hook and the handle is 120 degrees.

9. A novel corneal stromal interlayer separator according to claim 1, wherein: the working part has a certain radian.