CN107736905B - Medical suture and medical device - Google Patents

Abstract

The invention discloses a medical suture and a medical instrument. The medical suture includes: a flexible filament having a first end and a second end, and a plurality of multi-claw barbs projecting from the flexible filament. The medical suture and the medical instrument can strengthen the acting force of the suture body on tissues and improve the holding strength.

Description

Medical suture and medical device

Technical Field

The present invention relates to the field of surgery and medical cosmetology, and in particular to a medical suture thread and a medical device used for tissue suturing, wound closure or tissue lifting and fixation.

Background Art

Medical sutures are a type of medical device commonly used in surgical operations to close wounds, tie knots, and fix tissues. In recent years, a type of medical suture with barbs has appeared on the market. The barbs of medical sutures can hook the tissues around the barbs, allowing the medical sutures to pass through the tissues in one direction but preventing them from moving in the opposite direction, thereby providing the characteristic of non-slippage of the suture body. Therefore, this type of medical suture with barbs does not need to be knotted like traditional medical sutures when used. In addition, this type of medical suture can achieve the purpose of lifting tissues by pulling the tissues through the gripping force of the barbs, and is therefore also widely used in medical beauty fields such as eyebrow lifting, facial firming, buttock lifting, and breast plastic surgery.

This type of barbed medical suture is currently mainly realized in two ways. The first is to realize the barb by adding a barrier to the medical suture. Chinese patent CN 101500495B discloses a suture with a cone-shaped tissue engaging element. These tissue engaging elements are suspended at pre-formed nodules at predetermined intervals on the thread body. Chinese patent CN102869818 B discloses a method of preparing a suture with micro-teeth on the surface by heating and extruding the raw materials of the suture under specific temperature and pressure conditions through a hot pressing solid phase molding method. This type of medical suture may cause greater damage and pain when inserted into the tissue because the cross-sectional area of the medical suture is increased as a whole.

The second method is to cut barbs on the structure of the original medical suture. The structure of this type of barbs and their distribution on the thread body are disclosed in Chinese patent CN1925795 B. The cutting method of the above-mentioned barbs is disclosed in Chinese patent CN 1322840 C. The advantage of this type of barbs is that these barbs will only open and grab the tissue to prevent the thread body from sliding back when the medical suture is pulled in the opposite direction of insertion. The "grip" of the barbs on the tissue is related to its cutting depth, because the deeper the cutting depth, the larger the area of action of the barbs with the tissue in the direction perpendicular to the insertion direction of the medical suture, and the greater the retention strength obtained. However, excessively increasing the cutting depth may cause the thread body of the cut part to be too thin, thereby reducing the tensile strength of the medical suture, thereby causing the thread body to be easily torn when pulled.

Summary of the invention

The technical problem to be solved by the present invention is to provide a medical suture thread and a medical device, which can enhance the force of the thread body on the tissue and improve the holding strength.

In order to solve the above technical problems, the present invention provides a medical suture thread, comprising: a flexible filament having a first end and a second end, and a plurality of multi-claw barbs protruding from the flexible filament.

Preferably, the multi-claw barb is formed by forming at least one protrusion for holding tissue on the single-claw barb on the flexible filament.

Preferably, the multi-claw barb is configured such that the tip and/or both sides of the single-claw barb cut on the flexible filament are cut again to form a double-claw horse-shoe shape, a three-claw horse-shoe shape or a palm-shaped leaf shape structure; or the multi-claw barb is configured such that the outer side surface of the single-claw barb cut on the flexible filament is cut again to form a Y-shaped forked structure.

Preferably, the multi-claw barbs located at the same cross section of the flexible filament are 180°, 120° or 60° apart from each other.

Preferably, the plurality of multi-claw barbs are arranged in a spiral shape on the flexible filament.

Preferably, the multi-claw barb opening toward the first end is arranged near the second end, and the multi-claw barb opening toward the second end is arranged near the first end.

Preferably, the multi-claw barb is formed by one or more methods including mechanical cutting, laser cutting, injection molding or stamping.

Preferably, the flexible filament is made of one of collagen, polydioxanone, polylactic acid, polyglycolic acid, polycaprolide, natural silk, metal, metal alloy, polypropylene, polyester, and polyamide; or is made of a copolymer formed by at least two of polydioxanone, polylactic acid, polyglycolic acid, and polycaprolide; or is made of a copolymer or blend formed by at least two of polypropylene, polyester, and polyamide.

Preferably, the cross-sectional shape of the flexible filament is circular, elliptical, triangular, rhombus, square, rectangular, trapezoidal or polygonal.

The present invention also discloses a medical device, which includes a suture needle, an injection needle or a guide needle, and also includes the above-mentioned medical suture thread, the first end and/or the second end of the medical suture thread is connected to the suture needle; the medical suture thread is arranged in the injection needle; the medical suture thread is arranged in the guide needle.

Compared with the prior art, the medical suture and medical device of the present invention have the beneficial effect that: because the multi-claw barb has multiple protrusions, the action area between the medical suture and the tissue is increased, and a greater holding strength can be obtained.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is a schematic structural diagram of a medical suture thread according to a first embodiment of the present invention;

FIG2 is a cross-sectional view of FIG1;

FIG3 is a schematic structural diagram of a medical suture thread according to a second embodiment of the present invention;

FIG4 is a schematic structural diagram of a medical suture thread according to a third embodiment of the present invention;

FIG5 is a cross-sectional view of FIG4;

FIG6 is a schematic structural diagram of a medical suture thread according to a fourth embodiment of the present invention;

FIG7 is a cross-sectional view of FIG6;

FIG8 is a schematic diagram of the two-dimensional structure of the multi-claw barb of FIG1 ;

FIG9 is a schematic diagram of a method for cutting the multi-claw barb shown in FIG8 ;

FIG10 is a schematic diagram of cutting the multi-claw barb shown in FIG8 using a combined cutter;

FIG11 is a schematic structural diagram of a medical suture thread according to a fifth embodiment of the present invention;

FIG12 is a schematic structural diagram of a medical suture thread according to a sixth embodiment of the present invention;

FIG13 is a schematic structural diagram of a medical suture thread according to a seventh embodiment of the present invention;

FIG14 is a schematic structural diagram of a medical suture according to an eighth embodiment of the present invention;

FIG. 15 is a schematic structural diagram of a medical suture thread according to a ninth embodiment of the present invention.

Explanation of the reference numerals: 1-flexible filament; 2-multi-claw barb; 3-first end; 4-second end; 5-combination cutter; 6-protrusion.

DETAILED DESCRIPTION

The medical suture and medical device of the present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments, but this is not intended to limit the present invention.

With reference to Fig. 1-Fig. 15, the present invention discloses a medical suture, which comprises: a flexible filament 1 having a first end 3 and a second end, and a plurality of multi-claw barbs 2 protruding from the flexible filament 1 (with reference to Fig. 8, Fig. 11-Fig. 15). Among them, the difference between the multi-claw barb 2 and the single-claw barb commonly used in the prior art is that the multi-claw barb 2 has a plurality of protrusions 6, while the single-claw barb has one protrusion 6. The size of the protrusion 6 of the multi-claw barb 2 of the present invention and the angle relative to the flexible filament 1 are not limited, and the sharpness of the tip of the protrusion 6 is not limited, and can have a certain curvature or have a sharp angle. In addition, the opening directions of the plurality of multi-claw barbs 2 on the flexible filament 1 are the same, so that due to the "gripping force" of the multi-claw barb 2 on the tissue, the medical suture can be prevented from moving in the tissue toward the opening direction of the multi-claw barb 2, that is, the medical suture can easily pass through the tissue in the opposite direction of the opening direction of the multi-claw barb 2, and then moving in the opening direction of the multi-claw barb 2 will be subject to great resistance. The distribution of the plurality of multi-claw barbs 2 on the flexible filament 1 is not limited, and can be symmetrically distributed or asymmetrically distributed. In addition, the medical suture thread may include a plurality of single-claw barbs in addition to the plurality of multi-claw barbs 2, and the plurality of single-claw barbs and the plurality of multi-claw barbs 2 may be staggeredly distributed on the flexible filament 1.

The medical suture disclosed by the present invention has a plurality of protrusions 6 on the multi-claw barb 2, thereby increasing the interaction area between the medical suture and the tissue, and being able to obtain a greater holding strength.

In one embodiment, the multi-claw barb 2 is formed by forming at least one protrusion 6 for holding tissue on a single-claw barb on a flexible filament 1. Since the multi-claw barb 2 is formed on the basis of the single-claw barb, there is no need to increase the depth of the single-claw barb on the flexible filament 1, so that the flexible filament 1 of the medical suture thread will not be too thin, thereby increasing the area of action between the medical suture thread and the tissue without increasing the tensile strength of the medical suture thread, thereby obtaining a greater holding strength. In addition, the multi-claw barb 2 can also be formed by other methods, not limited to being formed by processing only on the basis of the single-claw barb.

Among them, the multi-claw barb 2 can be formed by one or more methods including mechanical cutting, laser cutting, injection molding or stamping. Specifically, the multi-claw barb 2 can be integrally formed by a combination of tools, lasers or models, or can be formed by multiple cutting, injection molding, stamping or a combination thereof.

Specifically, as shown in FIG9 , the cross section of the flexible filament 1 is circular, and the flexible filament 1 is first cut along the solid line in the figure, with the tip of the tool facing the central axis of the flexible filament 1, and then the barbs are cut along the dotted line in the figure to form a multi-claw barb 2 with a double-claw hoof-shaped structure. In addition, it can also be achieved by a combined tool 5 (refer to FIG10 ) or a combined laser, etc. Among them, the combined tool 5 has two blade parts perpendicular to each other.

In one embodiment, the multi-claw barb 2 is configured to be cut again at the tip and/or both sides of the single-claw barb cut on the flexible filament 1 to form a double-claw hoof (refer to Figure 1, Figure 2, Figure 4, Figure 5, Figure 6, Figure 7 or Figure 8), a three-claw hoof (refer to Figure 11) or a palm leaf structure (refer to Figure 12 or Figure 13), wherein the single-claw barb can be cut once or multiple times. Referring to Figure 8, the double-claw hoof structure formed includes two protrusions 6, and the two protrusions 6 are generally "M" shaped.

Referring to FIG11 , the formed three-clawed horseshoe structure includes three protrusions 6, which are arranged in parallel, and the lengths of the three protrusions 6 can be the same or different. Among them, the method of forming the multi-clawed barbs 2 of the three-clawed horseshoe structure can be specifically to first cut two knives along the V-shaped outer surface of the flexible filament 1, the center line of the V-shaped is parallel to the center axis of the flexible filament 1, and then cut the barbs along the intersection of the V-shaped toward the opening direction. The above steps can also be implemented by a combination tool or a combination laser.

12 and 13, the palm-shaped leaf-shaped structure may include a symmetrical palm-shaped leaf-shaped structure and an asymmetrical palm-shaped leaf-shaped structure, and the multi-claw barbs 2 of the palm-shaped leaf-shaped structure are similar to palm-shaped leaves. The method of forming the multi-claw barbs 2 of the palm-shaped leaf-shaped structure may be to cut or remove part of the structure at the edge of the single-claw barb.

Due to the tension of the flexible filament 1, when the single-claw barb is cut again, the cut parts are separated from each other, so that the original single-claw barb has more spikes or serrations, that is, a plurality of protrusions 6 are formed. The formed protrusions 6 enable the multi-claw barb 2 to grasp a larger range of surrounding tissue as a whole, thereby improving the ability of the multi-claw barb 2 to anchor the tissue and improving the holding strength of the pulled tissue.

In another embodiment, referring to FIG15 , the multi-claw barb 2 is configured by cutting the outer side of the single-claw barb cut on the flexible filament 1 again to form a y-shaped forked structure, and the multi-claw barb 2 is overall "y"-shaped when viewed from the side of the multi-claw barb 2. The method of forming the multi-claw barb 2 with a y-shaped forked structure may be to cut a second single-claw barb on the first single-claw barb.

In one embodiment, referring to FIG. 2 , the arrangement of the plurality of multi-claw barbs 2 on the flexible filament 1 may be such that the multi-claw barbs 2 located on the same cross section of the flexible filament 1 are 180°, 120°, or 60° apart from each other.

In another embodiment, referring to Figures 4 to 7, a plurality of multi-claw barbs 2 are arranged in a spiral shape on the flexible filament 1. Further, when viewed along the axial direction of the flexible filament 1, the plurality of multi-claw barbs 2 on the flexible filament 1 are 180°, 120° or 60° apart from each other.

The opening directions of the multi-claw barbs 2 on the medical suture may all be toward the first end 3, or toward the second end 4. In addition, since the medical suture may need to be sutured from both ends, in one embodiment, referring to FIG3 , the multi-claw barbs 2 opening toward the first end 3 are arranged near the second end 4, and the multi-claw barbs 2 opening toward the second end 4 are arranged near the first end 3, so that tissues can be sutured from the first end 3 and the second end 4, respectively.

In the above embodiment, the flexible filament 1 can be made of an absorbable material or a non-absorbable material. For example, the flexible filament 1 can be made of one of absorbable materials such as collagen, polydioxanone, polylactic acid, polyglycolic acid, polycaprolide, etc.; or a copolymer formed by at least two of absorbable materials such as polydioxanone, polylactic acid, polyglycolic acid and polycaprolide; in addition, the flexible filament 1 can also be made of one of non-absorbable materials such as natural silk, metal, metal alloy, polypropylene, polyester, polyamide, etc.; or a copolymer or blend formed by at least two of non-absorbable materials such as polypropylene, polyester, polyamide, etc. The cross-sectional shape of the flexible filament 1 can be circular, elliptical, triangular, rhombus, square, rectangular, trapezoidal or polygonal.

The present invention also discloses a medical device (not shown in the figure), which includes a suture needle, an injection needle or a guide needle, and also includes the above-mentioned medical suture thread, the first end 3 and/or the second end 4 of the medical suture thread is connected to the suture needle for surgical suturing; the medical suture thread is arranged in the injection needle for lifting and tightening the skin during medical cosmetic surgery; the medical suture thread is arranged in the guide needle for lifting and tightening the skin during medical cosmetic surgery.

The above embodiments are only exemplary embodiments of the present invention and are not intended to limit the present invention. The protection scope of the present invention is defined by the claims. Those skilled in the art may make various modifications or equivalent substitutions to the present invention within the essence and protection scope of the present invention, and such modifications or equivalent substitutions shall also be deemed to fall within the protection scope of the present invention.

Claims (8)

1. A medical suture, comprising: a flexible filament having a first end and a second end, and a plurality of multi-claw barbs projecting from the flexible filament,

The multi-claw barb comprises two or more protrusions;

the multi-claw barbs are arranged to cut again at the tips of the single-claw barbs cut on the flexible filaments to form a double-claw shoe type or a three-claw shoe type; or the multi-claw barbs are arranged to cut again at two sides of the single-claw barbs cut on the flexible filament so as to form a palm-like leaf-shaped structure; or the multi-claw barbs are arranged to cut again at the tip and two sides of the single-claw barbs cut on the flexible filament so as to form a palm-like leaf-shaped structure; or the multi-claw barbs are arranged to cut the outer side surfaces of the single-claw barbs cut on the flexible filaments again to form a y-shaped bifurcation structure;

the plurality of single-claw barbs and the plurality of multi-claw barbs are distributed on the flexible filament in a staggered way.

2. The medical suture of claim 1, wherein the multi-jaw barbs located at the same cross section of the flexible filament are 180 °, 120 ° or 60 ° relative to each other.

3. The medical suture of claim 1, wherein a plurality of the multi-claw barbs are helically arranged on the flexible filament.

4. The medical suture of claim 1, wherein the multi-claw barb opening toward the first end is disposed proximate the second end and the multi-claw barb opening toward the second end is disposed proximate the first end.

5. The medical suture of claim 1, wherein the multi-claw barb is formed by one or more of mechanical cutting or laser cutting.

6. The medical suture of claim 1, wherein the flexible filaments are made of one of collagen, polydioxanone, polylactic acid, polyglycolic acid, polycaprolactone, natural silk, metal alloy, polypropylene, polyester, polyamide; or from a copolymer formed from at least two of polydioxanone, polylactic acid, polyglycolic acid and polycaprolactone; or a copolymer or blend of at least two of polypropylene, polyester, polyamide.

7. The medical suture of claim 1, wherein the flexible filament has a cross-sectional shape that is circular, oval, triangular, diamond, square, rectangular, trapezoidal, or polygonal.

8. A medical device comprising a suture needle, an injection needle or a guide needle, wherein the medical device further comprises the medical suture of any one of claims 1-7, wherein the first end and/or the second end of the medical suture is connected to the suture needle; the medical suture line is arranged on the injection needle; the medical suture line is arranged in the guide needle.