WO2023075358A1

WO2023075358A1 - Reduction mechanism used for comminuted fracture reduction

Info

Publication number: WO2023075358A1
Application number: PCT/KR2022/016341
Authority: WO
Inventors: 손국희; 이진우; 박정규
Original assignee: (의료)길의료재단
Priority date: 2021-10-26
Filing date: 2022-10-25
Publication date: 2023-05-04

Abstract

Provided is a reduction mechanism which is inserted into the body to reduce comminuted bones, the reduction mechanism being characterized by comprising: a sheet member that is stretchable and surrounds a plurality of fractured bone pieces; first fastening parts provided, respectively, at both ends of the sheet member; and a second fastening part coupled to the first fastening parts, thereby connecting both the ends of the sheet member. Accordingly, the reduction mechanism improves bone union and can enhance patient convenience.

Description

Reduction apparatus used for reduction of comminuted fractures

The present invention relates to a reduction instrument used to reduce a plurality of fractured bones.

Fractures can occur when a strong external force is applied to the bone. Among them, a comminuted fracture is a fracture in which the bone is pulverized and fragmented. In comminuted fractures, it is difficult and time-consuming to unite multiple bones compared to simple fractures in which two fracture fragments are formed by one fracture line.

Comminuted fractures can damage surrounding blood vessels or tissues as multiple bones break, which is accompanied by bruising and swelling. Broken bones can damage blood vessels, causing internal bleeding, and damage surrounding tissue, resulting in severe swelling.

1a and 1b are photographs of a conventional treatment method for comminuted fractures when a finger bone is comminuted. 1a and 1b, conventionally, several pins were driven into a plurality of fractured bones to fix the bones. 1A is a state in which a plurality of pins are inserted into a patient's hand, and FIG. 1B is an x-ray picture of a hand with pins. In the case of performing surgery by driving a plurality of pins as in the prior art, while the pins are inserted, the patient continuously experiences pain in the corresponding area, more specifically, the hand, and cannot move, causing great discomfort to the patient. In addition, it is necessary to drive several pins into the fractured bones, but in many cases where the fractured bones are small, it is difficult to drive several pins, which may limit bone union. Infection may occur in the outer skin where the pin is inserted, and in addition, after the fractured bone is fused, a separate operation to remove the pin must be performed, which increases the pain of the patient.

Accordingly, the applicant of the present invention has developed additional research and development to wrap and fuse the plurality of fractured bones without using pins in order to solve the problems of the conventional treatment method in which the above-described plurality of pins are directly driven into the fractured bones to allow the bones to fuse. proceeded.

[Prior art literature]

[Patent Literature]

Patent Document 1. Korean Patent Publication No. 2019-0076538

Patent Document 2. Japanese Laid-open Patent No. 2021-000454

An object of the present invention is to provide a reduction device, which is one of the reduction instruments used in fracture reduction surgery, that wraps a plurality of fractured bones so that the bones can be fused without using a plurality of pins penetrating the bones. In addition, the present invention is to provide a reduction device that does not require a separate operation to remove the inserted device after fracture reduction surgery.

The problems to be solved by the present invention are not limited to the problems mentioned above. Other problems and advantages of the present invention will be more clearly understood from the description below.

In order to achieve the above object, the present invention provides a reduction mechanism inserted into a body to reduce a crushed fractured bone, comprising: a sheet member surrounding a plurality of fractured bones; first fastening parts respectively provided at both ends of the sheet member; And characterized in that it comprises a second fastening portion coupled to the first fastening portion to connect both ends of the sheet member.

Preferably, the sheet member may be in the form of a mesh consisting of a plurality of cells having different shapes.

Preferably, the first fastening part forms a ring, the second fastening part is a cable tie band having a plurality of teeth that can be fastened to the ring, and the first fastening part and the second fastening part are fastened to the sheet. Both ends of the member can be connected.

Preferably, in the sheet member, a distance between both ends of each of the first fastening parts may correspond to a circumferential length of a fractured bone.

Preferably, the sheet member may have a different distance between both ends provided with the first fastening part according to the shape of the fractured bone.

Preferably, the sheet member may have a shape in which a distance between both ends provided with the first fastening part is tapered narrower on one side than on the other side as the thickness of the bone becomes thinner.

In addition, in order to achieve the above object, the present invention, in the reduction mechanism for conquering a fractured bone, a sheet member composed of a plurality of cells capable of stretching; A first fastening part provided at one end of the sheet member and having a plurality of convex protrusions protruding convexly; and a second fastening part provided at the other end of the sheet member, wherein a plurality of concave grooves fitted with the convex projections are formed corresponding to the convex projections, and the sheet member has a plurality of fractures in which the convex projections and the concave grooves are combined. Encircling the dog's bone is another characteristic.

Preferably, a plurality of fractured bones inside or outside the body may be surrounded and fixed.

Preferably, it is made of a biodegradable polymer and can be degraded in the body.

The present invention helps bone union by wrapping a plurality of comminuted fractured bones in the body at once. Therefore, it is possible to significantly alleviate the patient's pain compared to the conventional pin fixing method, and the patient's convenience can be increased because the body except for the fractured part can be moved. In particular, even when the size is small, such as a finger bone, the fractured bone is wrapped as a whole to be fused, so the bone fusion effect has a greater advantage than before.

The present invention can be customized to each individual shape or size in consideration of the shape of the fracture site or the physical characteristics of the patient through 3D printing. Through this, it is possible to improve the fusion effect of the corresponding fracture site.

In addition, since the reduction device of the present invention is biodegradable in the body, the risk of infection from the external skin is low, and it does not require a separate operation to remove the reduction device after reduction surgery, thereby reducing the patient's pain and saving time and money. efficient

1a and 1b are photographs of a conventional method for treating a fracture using a plurality of pins when a finger bone is fractured.

2 shows a configuration diagram of a conquering mechanism according to an embodiment of the present invention.

3A and 3B show various embodiments of the sheet member of the present invention.

Figures 4a to 4d show an embodiment of application of the reduction mechanism of the present invention to comminuted fractured chicken bones.

5 shows an embodiment of another fastening structure of the conquering mechanism of the present invention.

FIG. 6 shows a conquering instrument in the form of the FIG. 5 embodiment of the present invention manufactured in various sizes.

7a and 7b show a state in which the conquest mechanism of the embodiment of FIG. 5 of the present invention is fastened to a finger.

Hereinafter, the present invention will be described in detail with reference to the contents described in the accompanying drawings. However, the present invention is not limited or limited by exemplary embodiments. The same reference numerals in each figure indicate members performing substantially the same function.

The objects and effects of the present invention can be naturally understood or more clearly understood by the following description, and the objects and effects of the present invention are not limited only by the following description. In addition, in describing the present invention, if it is determined that a detailed description of a known technology related to the present invention may unnecessarily obscure the subject matter of the present invention, the detailed description will be omitted.

2 shows a configuration diagram of a conquering mechanism 1 according to an embodiment of the present invention.

The reduction mechanism 1 can reduce by surrounding and fixing a plurality of fractured bones. The reduction device 1 may wrap the fracture site inside or outside the body. In particular, since the reduction mechanism 1 is composed of a biodegradable material and is degraded in the body, it can be inserted into the body and directly wrap the fractured bone. The reduction mechanism 1 is made of a biodegradable polymer and can be degraded in the body. The conquering device 1 is a biodegradable polymer and may be a natural polymer, a synthetic polymer, or a polymer produced by microorganisms, and may not be limited to the type as long as it is degradable in the body. Therefore, the reduction device 1 does not require a separate procedure to remove the reduction device 1 since the bone is reduced or biodegraded after being inserted into the body during the reduction procedure. In addition, since the reduction mechanism 1 directly wraps and fixes the fractured bone, it is possible to minimize the movement of bone fragments and apply hydraulic pressure, rather than fixing them outside the body. The seat member 10, the first fastening part 30, and the second fastening part 50 included in the reduction mechanism 1 may all be made of biodegradable materials. In addition, the conquering device 1 may be manufactured by a 3D printing technique, and may be manufactured in a shape or size customized to an individual user through the 3D printing technique.

The conquering mechanism 1 may include a seat member 10 , a first fastening part 30 and a second fastening part 50 .

The sheet member 10 is extensible and can surround a plurality of fractured bones. The sheet member 10 is manufactured in the form of a sheet having a large area, and may cover a cylindrical bone having a predetermined length. A length between both ends of the sheet member 10 may be a length corresponding to a minimum bone circumference. The sheet member 10 may have a rectangular sheet shape, but the shape is not limited as long as it can wrap bones. The seat member 10 may be made of an elastic material, and is slightly stretched in the process of covering the fractured bone, and then contracted again when the first fastening part 30 and the second fastening part 50 are combined to fix the bone. can make it

The sheet member 10 may be a single sheet without holes, or may have a mesh shape composed of a plurality of cells 100 with a central portion pierced. The cell 100 may be formed by crossing or twisting the biodegradable materials constituting the sheet member 10 at a specific location. The cell 100 may have a shape such as a rectangle or a circle with a central portion penetrated, but is not limited to its shape or size, and may be manufactured in various ways according to the patient's individual characteristics or the tissue characteristics of the fractured part. Since the sheet member 10 is manufactured in a mesh shape in which a plurality of cells 100 are formed, it can be more easily stretched or contracted when both ends of the sheet member 10 are coupled. The cell 100 may constitute the sheet member 10 using only a single shape, or may constitute a single sheet member 10 by combining various shapes. It will be described later in detail with reference to FIG. 3B.

The sheet member 10 may be provided with first fastening parts 30 at both ends, respectively. The distance between both ends of the sheet member 10, that is, the distance between the first fastening parts 30 may correspond to the circumferential length of the fractured bone. Accordingly, the distance between both ends of the sheet member 10 provided with the first coupling part 30 may be different according to the type of fractured bone, the thickness of the user's bone, or the shape of the fractured bone. This is because the conquering device 1 of the present invention can be manufactured through 3D printing to suit individual situations.

The first fastening parts 30 may be provided at both ends of the sheet member 10, respectively, and may form a ring as shown in FIG. 2. The second fastening part 50 may be separated from the sheet member 10 , and a plurality of teeth 501 may be formed to be fastened to the ring of the first fastening part 30 . The second fastening part 50 may be a cable tie band. The ring of the first fastening part 30 may be coupled to the tooth 501 of the second fastening part 50, and once coupled, the first fastening part 30 is the tooth of the second fastening part 50 ( 501) may not be separated. The first fastening part 30 attaches the second fastening part 50 to the ring of the first fastening part 30 after the first fastening part 30 at both ends approaches while the sheet member 10 surrounds the fractured bone. ) By being inserted, it can be coupled to the teeth (501). As a result, as the two first fastening parts 30 and the second fastening parts 50 provided at both ends of the sheet member 10 are fastened, the sheet member 10 can surround and fix the fractured bone.

3A and 3B show various embodiments of the sheet member 10 of the present invention. More specifically, FIG. 3A shows a sheet member 10 having a rectangular shape with one side and the other side having different lengths. As described above, the reduction mechanism 1 of the present invention can be manufactured by 3D printing, so that the type of fractured bone, the thickness of the user's bone, or the shape of the fractured bone can be considered and tailored to it during initial design. Thus, the distance between both ends of the sheet member 10 provided with the first fastening portion 30 may be different rather than constant.

Among them, FIG. 3A shows the sheet member 10 applied to, for example, a finger bone when the thickness of a bone extended in the longitudinal direction gradually decreases. Referring to FIG. 3A , it can be seen that the length A of the left side of the sheet member 10 is shorter than the length B of the right side. Accordingly, the sheet member 10 has a shape in which the distance between both ends at which the first fastening portion 30 is provided becomes gradually tapered toward the left side (A) rather than the right side (B) as the thickness of the finger bone becomes thinner. can However, since the shape of the sheet member 10 is determined according to the shape of the bone, it may be variously tapered in one direction, a fan shape, and the like, as shown in FIG. 3A.

3B shows one of the sheet members 10 made of cells 100 of various shapes. Referring to FIG. 3B , based on the center of the sheet member 10 , it can be seen that the upper cell a 100a and the lower cell b 100b have different shapes. Cell a (100a) at the top of FIG. 3B is formed vertically and parallel with a plurality of straight lines forming regular intervals, while cell b (100b) at the bottom is a sheet member in which a plurality of straight lines intersect each other to create a diamond shape. (10) is in the form of a mesh. As such, one sheet member 10 may be composed of a plurality of cells 100 having different shapes, and the shapes or sizes of the cells 100 may be set in various ways during the design process for 3D printing. The cell 100 has different tension applied when stretched, degree of stretch, and area surrounding a plurality of bones according to each shape or size. Therefore, the shape and size of the cell 100 suitable for the type of bone or location of fracture may be applied to enhance the fusion effect. For example, in the case of FIG. 3B , cell a (100a) is more densely formed than cell b (100b) and thus has strong stretchability, but may have weak elasticity. Since the seat member 10 composed of only the cells a 100a has weak elasticity and strong fixation force to bones, a user may feel uncomfortable. On the other hand, the sheet member 10 composed of only the cell b 100b has a relatively weak fixing force to the bone due to its high elasticity, and thus the fusion effect may be reduced. Therefore, by configuring the cell a 100a and the cell b 100b in one sheet member 10, it is possible to reduce the user's discomfort while having an appropriate fusion effect.

Figures 4a to 4d show an embodiment of applying the reduction mechanism 1 of the present invention to comminuted fractured chicken bones.

Figure 4a is a photograph of a crushed fractured chicken bone, in the case of a crushed fracture, bone fragments of various sizes, large and small, are produced as shown in Figure 4a.

4B is a state in which the second fastening parts 50 are inserted into the rings of the first fastening parts 30 provided at both ends of the sheet member 10 after matching the plurality of bone pieces to the sheet member 10 . In order to fuse a plurality of bones, the bones are matched on the sheet member 10, and the sheet member 10 may wrap the bones while bending both ends. The first fastening part 30 of FIG. 4B has a ring shape, and the second fastening part 50 has a cable tie band shape in which a plurality of teeth 501 are formed. It can be fastened while engaging with the teeth 501 of the part 50. At this time, the number of second fastening parts 50 used corresponds to the number of rings of the first fastening parts 30 provided at one end of the sheet member 10 . As can be reconfirmed in FIG. 4B , the horizontal and vertical lengths of the sheet member 10 may be determined according to the circumference (thickness) of the fractured bone and the length of the fractured area.

4C is a state in which the first fastening parts 30 at both ends of the sheet member 10 come into contact with each other and the sheet member 10 completely covers the bone fragments. In FIG. 4B, the positions of the first fastening parts 30 at both ends are different from each other in one second fastening part 50, but in FIG. 4C, the seat member 10 completely surrounds the bone fragments and the second fastening It can be seen that the parts 50 converge to one position.

Figure 4d shows the bone fragments wrapped around the sheet member 10, the opposite view of Figure 4c. It can be confirmed that the bone is wrapped at 360 degrees through the seat member 10 .

5 shows an embodiment of another fastening structure of the conquering mechanism 3 of the present invention. Similar to the conquering mechanism 1 of FIG. 2 described above, the conquering mechanism 3 of FIG. 5 includes a sheet member 10 composed of a plurality of stretchable cells, a first fastening part 30, and a second fastening part 50. Including, when the first fastening part 30 and the second fastening part 50 are coupled, the seat member 10 can surround a plurality of bones and fuse the bones in the body.

The first fastening part 30 is provided at one end of the sheet member 10, and a plurality of convex protrusions 70 protruding convexly may be formed. The second fastening part 50 is not separated from the sheet member 10 and is provided at the other end of the sheet member 10, and the convex protrusion 70 and the concave groove 90 fitted to the convex protrusion 70 Correspondingly, a plurality may be formed. Accordingly, the sheet member 10 may enclose a plurality of fractured bones by combining the convex protrusions 70 and the grooves 90 provided at both ends thereof.

As described above with reference to FIG. 3A, the sheet member 10 may be formed in a tapering shape in which one side of the sheet member 10 is shorter than the other side in consideration of the thickness of the bone when the bones in the longitudinal direction gradually become thinner. . In the case of FIG. 5 , it can be confirmed that the length C of the left side of the sheet member 10 is shorter than the length D of the right side. In addition, the reduction mechanism 3 is entirely made of a biodegradable polymer and can be degraded in the body.

Fig. 6 shows a reduction mechanism 3 of the Fig. 5 embodiment of the present invention fabricated in various sizes. As described above, since the reduction mechanism 3 is manufactured by 3D printing, the size may be different depending on the circumference of a bone or a fracture site.

7a and 7b show a state in which the conquering mechanism 3 of the embodiment of FIG. 5 of the present invention is fastened to a finger. The reduction mechanism 3 may surround and fix a plurality of bones fractured inside or outside the body.

Although the present invention has been described in detail through representative embodiments, those skilled in the art will understand that various modifications are possible to the above-described embodiments without departing from the scope of the present invention. will be. Therefore, the scope of the present invention should not be limited to the described embodiments and should not be defined, and should be defined by all changes or modifications derived from the claims and equivalent concepts as well as the claims to be described later.

[Description of code]

1, 3: Conquering Mechanism

10: sheet member

100: cell

100a: cell a

100b: cell b

30: first fastening part

50: second fastening part

501: teeth

70: convex projection

90: groove

Claims

In the reduction mechanism that is inserted into the body and conquers the crushed fractured bone,

In order to unite a plurality of fractured bones, including a sheet member made of the area of the fractured area,

A reduction mechanism characterized in that the sheet member is inserted into the body and surrounds the plurality of fractured bones in a cylindrical shape to fix the plurality of fractured bones to a closed area.
According to claim 1,

first fastening parts respectively provided at both ends of the sheet member; and

A conquering mechanism further comprising a second fastening portion coupled to the first fastening portion to connect both ends of the seat member.
According to claim 2,

The sheet member,

A conquering mechanism characterized in that it is in the form of a mesh consisting of a plurality of cells having different shapes.
According to claim 2,

The first fastening part forms a ring,

The second fastening part is a cable tie band having a plurality of teeth that can be fastened to the ring,

A conquering mechanism, characterized in that connecting both ends of the seat member by fastening the first fastening part and the second fastening part.
According to claim 2,

The sheet member,

A reduction mechanism, characterized in that the distance between both ends of the first fastening portion corresponds to the circumferential length of the fractured bone.
According to claim 2,

The sheet member,

A reduction mechanism, characterized in that the distance between both ends provided with the first fastening part is different according to the shape of the fractured bone.
According to claim 6,

The sheet member,

Conquest mechanism, characterized in that the distance between both ends provided with the first fastening portion is tapered narrower on one side than on the other side as the thickness of the bone becomes thinner.
In the reduction mechanism for reducing the fractured bone,

a sheet member composed of a plurality of stretchable cells;

A first fastening part provided at one end of the sheet member and formed with a plurality of convexly protruding convex protrusions; and

It is provided at the other end of the sheet member, and includes a second fastening portion formed with a plurality of concave grooves fitted with the convex projections to correspond to the convex projections,

The seat member is a reduction mechanism, characterized in that the convex protrusion and the groove are coupled to surround a plurality of fractured bones.
According to claim 8,

A reduction mechanism characterized in that it surrounds and fixes a plurality of fractured bones inside or outside the body.
According to claim 1 or 8,

A conquering device made of a biodegradable polymer and characterized in that it is degradable in the body.