KR20240003531A - Lens cutting device using a plurality of wires - Google Patents

Abstract

A capsulotomy device is provided that can minimize the size of the surgical incision window during cataract surgery using extracapsular enucleation.
This capsulotomy device includes: a needle tube including a tube portion that is closed at one end and open at the other end, and first and second holes formed on a side of the tube portion adjacent to one end of the tube portion; A hollow body part connected to the other end of the tube part; a plurality of wires extending from the inside of the body to the outside through the first hole and then extending to the inside of the body through the second hole; and a lever that reciprocates along the longitudinal axis of the body.

Description

Lens cutting device using a plurality of wires}

The present invention relates to a capsulotomy device used during cataract surgery, and more specifically, to a capsulotomy device for cutting the lens within the eye using a plurality of wires.

As you age, the lens inside the eye becomes cloudy and hard, causing a disease that reduces vision. As time passes, the lens turns white, so this disease is called a cataract. If cataracts develop and do not undergo surgery, they can lead to blindness. In developed countries such as Korea, cataract surgery is easily available, so cases of blindness caused by it are rare. However, in developing countries such as Africa, cataract surgery is difficult to obtain and many cases of blindness occur. Statistically, about 50% of blindness worldwide is caused by cataracts. Cataract surgery involves removing the clouded lens and inserting an artificial lens instead. Cataract surgery can be performed in the following ways:

First, ultrasonic emulsification is a surgical technique that uses the power of ultrasonic waves to crush the lens nucleus into small pieces and then remove them by suctioning them with an aspirator. In developed countries such as Korea, over 99% of cases use ultrasonic emulsification to remove the lens nucleus.

Second, intracapsular cataract extraction (ICCE) is a very old cataract surgery method that removes the entire lens nucleus and the tissue surrounding the lens. However, it is currently rarely used because it is difficult to insert an artificial lens after removing the lens.

Third, extracapsular cataract extraction (ECCE) is a cataract surgery technique that removes the lens nucleus inside while leaving the capsule (shell) of the lens behind. Ultrasonic emulsification can also be seen as a type of extracapsular enucleation, but in the medical field, it is generally contrasted with ultrasonic emulsification, and a method of removing the entire lens nucleus rather than using ultrasound is called 'extracapsular enucleation'.

Generally, the lens is about 4mm thick and 9mm in diameter. To remove the entire lens through extracapsular excision, a surgical incision of about 10 mm in size must be made, but ultrasonic emulsification uses the power of ultrasound to split the lens nucleus into small pieces and remove it, so a small incision of 2 to 3 mm can be made. Small incisions help reduce complications during surgery and reduce astigmatism after surgery. Despite the many advantageous aspects of ultrasonic emulsification, extracapsular enucleation is still performed as the main surgical technique in developing countries. This is because ultrasonic emulsification requires surgical equipment and expensive consumables worth tens to hundreds of millions of won. In addition, although in some cases, even in developed countries, extracapsular capsular excision is used when it is difficult to fragment the hard lens with ultrasound alone.

As such, extracapsular enucleation is still used as an effective surgical technique worldwide, but the surgical incision is relatively large compared to ultrasonic emulsification, so there is a risk of causing complications or astigmatism.

The problem to be solved by the present invention is to provide a capsulotomy device that can minimize the size of the surgical incision window during cataract surgery using extracapsular enucleation.

The problems to be solved by the present invention are not limited to the problems mentioned above, and other problems not mentioned can be clearly understood by those skilled in the art from the description below. will be.

A capsulotomy device according to an embodiment of the present invention for achieving the above object includes a tube portion that is closed at one end and open at the other end, and first and second holes formed on a side of the tube portion adjacent to one end of the tube portion. needle tube; A hollow body part communicated with and connected to the other end of the pipe part; a plurality of wires extending from the inside of the body to the outside through the first hole and then extending into the inside of the body through the second hole; and a lever that reciprocates along the longitudinal axis of the body. Here, both ends of each wire may be coupled to the lever. When the lever moves in the first direction, each wire may be pulled out through the first and second holes to form a ring surrounding the lens. When the lever moves in the second direction, each wire may be inserted through the first and second holes to cut the surrounding lens.

The plurality of wires may include first and second wires made of shape memory alloy. Here, when the lever moves in the first direction, the ring formed by the first wire may be inclined to the left at a first angle with respect to the longitudinal axis of the body portion, and the ring formed by the second wire may be inclined to the left at a first angle with respect to the longitudinal axis of the body portion. It may be formed to be inclined to the right at the first angle based on the longitudinal axis of the body.

The plurality of wires may include first to fourth wires made of shape memory alloy. Here, when the lever moves in the first direction, the ring formed by the first wire may be inclined to the left at a first angle with respect to the longitudinal axis of the body portion, and the ring formed by the second wire may be inclined to the left at a first angle with respect to the longitudinal axis of the body portion. The ring formed by the third wire may be formed to be inclined to the left at a second angle based on the longitudinal axis of the body, and the fourth wire may be inclined to the left at a second angle based on the longitudinal axis of the body. The ring formed by the wire may be inclined to the right at the second angle based on the longitudinal axis of the body portion.

A capsulotomy device according to another embodiment of the present invention for achieving the above object includes a tube part that is closed at one end and open at the other end, and first to fourth holes formed on a side of the tube part adjacent to one end of the tube part. needle tube; A hollow body part communicated with and connected to the other end of the pipe part; a first wire extending from the inside of the body to the outside through the first hole and then extending into the inside of the body through the second hole; a second wire extending from the inside of the body to the outside through the third hole and then extending into the inside of the body through the fourth hole; and a lever that reciprocates along the longitudinal axis of the body portion. Here, both ends of the first wire and both ends of the second wire may be coupled to the lever. The first hole and the second hole may be located opposite to each other based on the longitudinal axis of the body, and the third hole and the fourth hole may be located opposite to each other based on the longitudinal axis of the body. When the lever moves in the first direction, the first wire may be pulled out through the first and second holes to form a ring surrounding the lens, and the second wire may be pulled out through the third and fourth holes. It can form a ring surrounding the lens. When the lever moves in the second direction, the first wire is introduced through the first and second holes to cut the surrounding lens, and the second wire is introduced through the third and fourth holes. The surrounding lens can be incised.

The first and second wires may be made of shape memory alloy. When the lever moves in the first direction, the ring formed by the first wire and the ring formed by the second wire may intersect each other on the longitudinal axis of the body portion.

The first and second holes may be formed to be spaced apart from one end of the pipe portion by a first distance, and the third and fourth holes may be formed to be spaced apart from one end of the pipe portion by a second distance.

A sliding portion connected to the lever may be disposed in an accommodating portion formed inside the body portion, and an elastic portion may be disposed between the other end of the tube portion and the sliding portion within the accommodating portion.

At one end of the crown, a fine protrusion may be formed to support the lens when the lens is incised.

Details of other embodiments are included in the detailed description and drawings.

As described above, according to the lens incision device according to the present invention, the lens is approached to the side of the lens, wrapped around the lens with a plurality of wires, and incised, so that the lens can be stably fixed during the incision, and further, the lens can be cut into several pieces at once. It can be crushed into small pieces. Therefore, by using the lens incision device of the present invention, external capsular excision can be performed stably even if the size of the incision is small, for example, about 5 to 6 mm. Due to the small incision, complications during surgery or astigmatism after surgery can be prevented in advance.

Since the lens is cut into pieces simultaneously using multiple wires, the thickness of the wires can be kept thin through distribution of force. The thin wire is soft overall, minimizing damage to other major structures within the eye.

In order to stably surround the lens without entangling a plurality of wires when they are pulled out from the needle tube, the drawing direction of each wire can be set in advance using shape memory alloy. For example, the first wire may be drawn out from the needle tube obliquely to the left, and the second wire may be obliquely pulled out from the needle tube to the right. Therefore, based on the longitudinal axis of the needle tube, a ring is formed by the first wire on the left and a ring by the second wire is formed on the right, thereby stably wrapping the lens and making an incision.

In order to stably surround the lens without entangling a plurality of wires when they are pulled out from the needle tube, first to fourth holes are formed in the needle tube, and the wire pulling direction and ring position can be set in advance. For example, a first hole, a third hole, a second hole, and a fourth hole are sequentially formed along the outer circumference of the needle tube, the first wire is drawn through the first hole and the second hole, and the second wire When pulled out through the third hole and the fourth hole, the ring by the first wire and the ring by the second wire are formed to intersect each other, so that the lens can be stably wrapped and cut.

1A is a cross-sectional view schematically showing the structure of the eye.
Figure 1b is a diagram schematically showing the process of cutting the lens using the lens cutting device of the present invention.
Figure 2 is a perspective view showing a capsulotomy device according to a first embodiment of the present invention.
Figure 3 is a cross-sectional view showing the needle tube of Figure 2.
Figure 4 is a partially cut away perspective view showing the needle tube of Figure 2.
Figure 5 is a partially cut-away perspective view showing the capsulotomy device of Figure 2.
Figure 6 is a perspective view showing a wire withdrawal state from the capsulotomy device of Figure 2.
Figure 7 is a front view showing the wire drawing state of Figure 6.
Figure 8 is a front view showing a wire withdrawal state in the capsulotomy device according to the second embodiment of the present invention.
Figure 9 is a perspective view showing the needle tube of the capsulotomy device according to the third embodiment of the present invention.
Figure 10 is a front view showing a wire withdrawal state from the capsulotomy device of Figure 9.

The advantages and features of the present invention and methods for achieving them will become clear by referring to the embodiments described in detail below along with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below and will be implemented in various different forms. The present embodiments only serve to ensure that the disclosure of the present invention is complete and that common knowledge in the technical field to which the present invention pertains is not limited. It is provided to fully inform those who have the scope of the invention, and the present invention is only defined by the scope of the claims. Like reference numerals refer to like elements throughout the specification.

Hereinafter, the capsulotomy device according to the first embodiment of the present invention will be described in detail with reference to the attached FIGS. 1A to 7. 1A is a cross-sectional view schematically showing the structure of the eye. Figure 1b is a diagram schematically showing the process of cutting the lens using the lens cutting device of the present invention. Figure 2 is a perspective view showing a capsulotomy device according to a first embodiment of the present invention. Figure 3 is a cross-sectional view showing the needle tube of Figure 2. Figure 4 is a partially cut away perspective view showing the needle tube of Figure 2. Figure 5 is a partially cut-away perspective view showing the capsulotomy device of Figure 2. Figure 6 is a perspective view showing a wire withdrawal state from the capsulotomy device of Figure 2. Figure 7 is a front view showing the wire drawn-out state of Figure 6.

Referring to FIG. 1A, the lens 40 in the eye 1 is a convex lens-shaped transparent body that refracts light and focuses it on the retina. The lens 40 is surrounded by a thin membrane called the lens capsule 42. Referring to FIG. 1B, when performing an extracapsular excision, a portion of the front part of the lens capsule 42 is removed and the entire lens 40 is taken out and moved to the front 25. Next, the capsulotomy device 100 is approached to the side of the lens 40, the lens 40 is wrapped with a plurality of wires of the capsulotomy device 100, and the lens 40 is pulverized into several pieces to be removed and replaced with an artificial lens. Reference numeral 10, which is not explained in FIG. 1, represents the sclera, 20 represents the cornea, 30 represents the conjunctiva, and 50 represents the iris.

2 to 5, the lens cutting device 100 of the present invention is a device that cuts the lens 40 into several pieces within the eye 1, and includes a needle tube 120, a body portion 110, and a plurality of pieces. It includes wires 131 and 132 and a lever 140.

The needle tube 120 includes a tube portion 124, a first hole 121, and a second hole 122. The pipe portion 124 has an overall pipe or tube shape, and one end 125 of the pipe portion 124 is closed and the other end of the pipe portion 124 is open. A first hole 121 and a second hole 122 are formed on the side of the pipe portion 124 adjacent to one end 125 of the pipe portion 124. The first hole 121 and the second hole 122 may be formed to face each other with respect to the longitudinal axis of the tube portion 124 or the body portion 110. The needle tube 120 may be made of, for example, a metal material.

The body portion 110 is connected to the other end of the pipe portion 124. The body portion 110 is made of a longitudinal hole shape and has a storage portion 112 therein. A slot 111 is formed on the side of the body 110 in the longitudinal direction.

The lever 140 reciprocates along the longitudinal axis of the body 110 while being inserted into the slot 111. The sliding part 142 connected to the lever 140 is disposed in the receiving part 112 formed inside the body part 110.

The plurality of wires 131 and 132 include a first wire 131 and a second wire 132. The plurality of wires 131 and 132 extend from the inside of the body 110 to the outside through the first hole 121 and then extend into the inside of the body 110 through the second hole 122. Both ends of the first wire 131 and both ends of the second wire 132 are coupled to the lever 140 or the sliding portion 142. Each wire 131 and 132 may be manufactured to have a thickness of, for example, 0.05 to 0.1 mm.

An elastic portion 113 is disposed within the receiving portion 112 of the body portion 110. Specifically, the elastic portion 113 may be disposed between the other end of the needle tube 120 or the tube portion 124 and the sliding portion 142.

In this way, the lens incision device 100 of the present invention connects the wires 131 and 131 through the holes 121 and 122 formed on the sides of the needle tube 120 in a state in which the end 125 of the needle tube 120 is closed. It has a structure of input or withdrawal. When performing an extracapsular excision, the needle tube 120 applies pressure directly to the lens 40 while the wires 131 and 132 surround the lens 40 and make an incision. Accordingly, stress is concentrated on the part of the lens 40 that is in contact with the part 125 of the needle tube 120, so that the lens 40 can be cut more easily.

Referring to FIGS. 6 and 7 , when the operator moves the lever 140 in the first direction or the direction toward the needle tube 120, the first wire 131 and the second wire 132 move into the first hole. It is drawn out through the second hole 121 and 122 to form a ring surrounding the lens 40, respectively. The plurality of wires 131 and 132 are made of shape memory alloy and have a special structure to prevent them from becoming tangled when pulled out from the needle tube 120. Specifically, the ring formed by the first wire 131 is inclined to the left at a first angle α based on the longitudinal axis of the body 110 or the needle tube 120. The ring formed by the second wire 132 is inclined to the right at a first angle α based on the longitudinal axis of the body 110 or the needle tube 120. Accordingly, the first wire 131 and the second wire 132 can stably wrap and fix the lens 40 without becoming entangled with each other in the drawn-out state.

When the lever 140 is moved in the second direction or in the direction opposite to the needle tube 120 by the operator, the first wire 131 and the second wire 132 are connected to the first hole 121 and the second hole 122. ), the lens 40 that is introduced into the needle tube 120 and surrounded can be cut. While incising the lens 40, one end 125 of the needle tube 120 or tube 124 serves to apply pressure while supporting the lens 40. To prevent the lens 40 from slipping while in contact with the needle tube 120 or the end 125 of the tube 124, a fine protrusion (not shown) is provided on the end 125 of the needle tube 120 or the tube 124. may be formed. For example, the fine protrusions may have a concavo-convex shape.

Hereinafter, a lens incision device according to a second embodiment of the present invention will be described in detail with reference to FIG. 8. Figure 8 is a front view showing a wire withdrawal state in the capsulotomy device according to the second embodiment of the present invention. For convenience of explanation, members having the same function as each member shown in the drawings (FIGS. 1 to 7) of the first embodiment are denoted by the same symbols and their descriptions are omitted, and the differences will be mainly explained below.

The capsulotomy device of this embodiment includes a first wire 131, a second wire 132, a third wire 133, and a fourth wire 134 made of shape memory alloy. Both ends of the third wire 133 and both ends of the fourth wire 134 are coupled to the lever 140 or the sliding portion 142.

When the operator moves the lever 140 in the first direction or the direction toward the needle tube 120, the plurality of wires 131, 132, 133, and 134 are connected to the first hole 121 and the second hole 122. are drawn out to form a ring surrounding each lens 40. The plurality of wires 131, 132, 133, and 134 are made of shape memory alloy and have a special structure to prevent them from becoming tangled when pulled out from the needle tube 120. Specifically, the ring formed by the first wire 131 is inclined to the left at a first angle α based on the longitudinal axis of the body 110 or the needle tube 120. The ring formed by the second wire 132 is inclined to the right at a first angle α based on the longitudinal axis of the body 110 or the needle tube 120. The ring formed by the third wire 133 is inclined to the left at a second angle β based on the longitudinal axis of the body 110 or the needle tube 120. The ring formed by the fourth wire 134 is inclined to the right at a second angle β based on the longitudinal axis of the body 110 or the needle tube 120. Accordingly, the plurality of wires 131, 132, 133, and 134 can stably wrap and fix the lens 40 without becoming tangled with each other in the drawn-out state, and further, the lens 40 can be cut into more detailed pieces.

Hereinafter, a lens incision device according to a third embodiment of the present invention will be described in detail with reference to FIGS. 9 and 10. Figure 9 is a perspective view showing the needle tube of the capsulotomy device according to the third embodiment of the present invention. Figure 10 is a front view showing a wire withdrawal state from the capsulotomy device of Figure 9. For convenience of explanation, members having the same function as each member shown in the drawings (FIGS. 1 to 7) of the first embodiment are denoted by the same symbols and their descriptions are omitted, and the differences will be mainly explained below.

The needle tube 220 of the capsulotomy device of this embodiment includes a tube portion 224, a first hole 231, a second hole 232, a third hole 233, and a fourth hole 234. The pipe portion 224 has an overall pipe or tube shape, and one end 225 of the pipe portion 224 is closed and the other end of the pipe portion 224 is open. A first hole 231, a second hole 232, a third hole 233, and a fourth hole 234 are formed on the side of the pipe portion 224 adjacent to one end 225 of the pipe portion 224. The needle tube 120 may be made of, for example, a metal material. The body portion 110 is connected to the other end of the pipe portion 224.

The first hole 231 and the second hole 232 may be formed to face each other with respect to the longitudinal axis of the tube portion 224 or the body portion 110. The third hole 233 and the fourth hole 234 may be formed to face each other with respect to the longitudinal axis of the tube portion 224 or the body portion 110. Preferably, the first hole 231, the third hole 233, the second hole 232, and the fourth hole 234 may be formed sequentially at equal intervals along the outer circumference of the needle tube 220. .

When cutting the lens, one end 225 of the needle tube 220 contacts and supports the lens 40 and serves to apply pressure. In order to ensure the strength of the needle tube 220, it is preferable that the plurality of holes 231, 232, 233, and 234 are not formed on the same circumference of the tube portion 224. For example, the first hole 231 and the second hole 232 may be formed to be spaced apart from the end 225 of the pipe portion 224 by a first distance D1, and the third hole 233 and the fourth hole 233 The hole 234 may be formed to be spaced apart from one end 225 of the pipe portion 224 by a second distance D2.

The first wire 131 extends from the inside of the body 110 to the outside through the first hole 231 and then extends into the inside of the body 110 through the second hole 232. The second wire 132 extends from the inside of the body 110 to the outside through the third hole 233 and then extends into the inside of the body 110 through the fourth hole 234.

When the lever 140 is moved by the operator in the first direction or in the direction toward the needle tube 220, the first wire 131 is pulled out through the first hole 231 and the second hole 232 to form the lens ( It forms a ring surrounding the lens 40, and the second wire 132 is drawn out through the third hole 233 and the fourth hole 234 to form a ring surrounding the lens 40. By arranging the plurality of holes 231, 232, 233, and 234, the ring formed by the first wire 131 and the ring formed by the second wire 132 intersect each other on the longitudinal axis of the body portion 110. This allows the lens 40 to be stably wrapped and fixed. The first wire 131 and the second wire 132 are made of shape memory alloy.

When the lever 140 is moved in the second direction or in the direction opposite to the needle tube 220 by the operator, the first wire 131 passes through the first hole 231 and the second hole 232 to the needle tube 220. ) and the second wire 132 is introduced into the needle tube 220 through the third hole 233 and the fourth hole 234 to cut the surrounding lens 40 together.

In the embodiments of the present invention, the case of cutting the lens from the beginning using a capsulotomy device is described as an example, but the present invention is not limited to this, and can also be applied to making smaller incisions in already cut lens pieces.

Although embodiments of the present invention have been described above with reference to the attached drawings, those skilled in the art will understand that the present invention can be implemented in other specific forms without changing the technical idea or essential features. You will be able to understand it. Therefore, the embodiments described above should be understood in all respects as illustrative and not restrictive.

1: eyeball
10: sclera
20: cornea
25: front
30: conjunctiva
40: Lens
42: Lens capsule
50: Iris
100: Lencotomy device
110: body part
111: slot
112: storage unit
113: elastic part
120: Needle tube
121: Hole 1
122: 2nd hole
124: Gwanbu
125: One end of the needle tube or tube part
131: first wire
132: second wire
133: third wire
134: fourth wire
140: lever
142: sliding part
220: Needle tube
224: Gwanbu
225: One end of the needle tube or tube part
231: Hole 1
232: 2nd hole
233: Hole 3
234: Hole 4

Claims (6)

A capsulotomy device for cutting the lens within the eye,
a needle tube including a tube portion that is closed at one end and open at the other end, and first and second holes formed on a side of the tube portion adjacent to one end of the tube portion;
A hollow body part communicated with and connected to the other end of the pipe part;
a plurality of wires extending from the inside of the body to the outside through the first hole and then extending into the inside of the body through the second hole; and
It includes a lever that reciprocates along the longitudinal axis of the body,
Both ends of each wire are coupled to the lever,
When the lever moves in the first direction, each wire is pulled out through the first and second holes to form a ring surrounding the lens,
When the lever moves in the second direction, each wire is introduced through the first and second holes to cut the surrounding lens. According to paragraph 1,
The plurality of wires include first and second wires made of shape memory alloy,
When the lever moves in the first direction, the ring formed by the first wire is inclined to the left at a first angle with respect to the longitudinal axis of the body, and the ring formed by the second wire is formed along the longitudinal axis of the body. A lens incision device characterized in that it is inclined to the right at the first angle with respect to . According to paragraph 1,
The plurality of wires include first to fourth wires made of shape memory alloy,
When the lever moves in the first direction, the ring formed by the first wire is inclined to the left at a first angle with respect to the longitudinal axis of the body, and the ring formed by the second wire is formed along the longitudinal axis of the body. is formed to be inclined to the right at the first angle with respect to, the ring formed by the third wire is formed to be inclined to the left at a second angle with respect to the longitudinal axis of the body, and the ring formed by the fourth wire is A capsulotomy device characterized in that it is inclined to the right at the second angle based on the longitudinal axis of the body. A capsulotomy device for cutting the lens within the eye,
a needle tube including a tube portion that is closed at one end and open at the other end, and first to fourth holes formed on a side of the tube portion adjacent to one end of the tube portion;
A hollow body part communicated with and connected to the other end of the pipe part;
a first wire extending from the inside of the body to the outside through the first hole and then extending into the inside of the body through the second hole;
a second wire extending from the inside of the body to the outside through the third hole and then extending into the inside of the body through the fourth hole; and
It includes a lever that reciprocates along the longitudinal axis of the body,
Both ends of the first wire and both ends of the second wire are coupled to the lever,
The first hole and the second hole are located opposite to each other based on the longitudinal axis of the body, and the third hole and the fourth hole are located opposite to each other based on the longitudinal axis of the body,
When the lever moves in the first direction, the first wire is pulled out through the first and second holes to form a ring surrounding the lens, and the second wire is pulled out through the third and fourth holes to form a ring surrounding the lens. Forms a ring surrounding the lens,
When the lever moves in the second direction, the first wire cuts the lens that is inserted through the first and second holes and surrounds the lens, and the second wire is inserted through the third and fourth holes and cuts the surrounding lens. A lens incision device characterized in that it cuts the lens. According to paragraph 4,
The first and second wires are made of shape memory alloy,
When the lever moves in the first direction, the ring formed by the first wire and the ring formed by the second wire intersect each other on the longitudinal axis of the body portion. According to clause 4,
The first and second holes are formed at a first distance from one end of the tube, and the third and fourth holes are formed at a second distance from one end of the tube. .

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