TWM626216U - Surgical suture with improved properties - Google Patents

Abstract

The disclosure provides a surgical suture with improved properties, comprising a plurality of suture units; wherein each of the suture units has at least two pairs of molded barbs which extend in opposite directions, and a plurality of cutting modifications between the two pairs of molded barbs, and there is an angle δ relative to the axis between one cutting modification and an adjacent cutting modification, ranging from 0°-180°.

Description

Surgical sutures with improved properties

The present disclosure relates to a surgical suture with enhanced tensile force without protruding tissue surface.

In order to strengthen the tensile force, the surgical suture will increase the molded barb. It is often used for wound suturing in laparoscopic minimally invasive surgery. Because of the molded barb structure of the suture, the tissue on both sides of the wound can be drawn closer, eliminating the need for beating. The need for knots, and the tensile strength of the suture itself can maintain the closure of the wound, and it is currently widely used surgical sutures.

However, although the commercially available sutures with molded barbs have improved grip on the tissue due to the barbs on the sutures, due to insufficient elasticity, the surface of the tissue, such as the skin epidermis, may bulge when used.

In view of the above problems, there is an urgent need for surgical sutures to improve the bulge of the tissue surface.

To solve the above problems, the present disclosure provides a surgical suture with improved properties, comprising a plurality of suture units, wherein each suture unit has at least 2 pairs of molded barbs and a plurality of cuts trim, wherein the two molded barbs of each pair of molded barbs extend toward each other in opposite directions, the plurality of cutting modifications are located between the two pairs of molded barbs; and the cutting modification is adjacent to another cutting modification There is an included angle δ relative to the suture axis, and δ is between 0° and 180°.

In one embodiment, the length of the suture unit is equal to or less than 10 mm.

In one embodiment, there are at least 2 cutting modifications, such as 2-6, between the two pairs of molded barbs. In a particular embodiment, there are 5 cutting modifications between the two pairs of molded barbs.

In one embodiment, the plurality of cleavage modifications are arranged in helical symmetry.

In one embodiment, the cutting modification and another adjacent cutting modification have an included angle δ with respect to the suture axis, and δ is between 0°-180°, preferably between 15°-90°, preferably is between 30°-90°.

In one embodiment, there is an acute angle θ between the molding barb and the suture, and θ is less than 90°, preferably equal to or less than 45°, more preferably equal to or less than 30°.

In one embodiment, the length of the molded barb 20 is equal to or less than 5 mm, preferably equal to or less than 1 mm.

In one embodiment, the length of the suture unit is equal to or less than 10 mm.

In one embodiment, each suture unit has at least two pairs of paired molded barbs and a plurality of cutting modifications, arranged in helical symmetry, and the helical cutting modification and another adjacent helical cut are relative to the suture. The shaft has an included angle δ, and δ is 30-90°. Preferably, there are 2-6 cutting modifications between the two pairs of molding barbs; in a specific embodiment, there are 5 cutting modifications between the two pairs of molding barbs.

10: Stitches

20: Barb

202: Molded Barbs

204: Cut modification

a: suture unit

θ: acute angle

δ: included angle

A-A’: Section Tangent

B-B': Section Tangent

The present disclosure is further illustrated by the following drawings: FIG. 1 is a schematic diagram of Reference Example 1 of the related previous case.

FIG. 2 is a schematic diagram of Reference Example 2 of the related previous case.

FIG. 3 is a cross-sectional view of Reference Example 2 of the related previous case.

FIG. 4 is a schematic diagram of Embodiment 1 of the present disclosure.

FIG. 5 is a cross-sectional view of Embodiment 1 of the present disclosure.

The technical features of the present disclosure, including specific features, are disclosed in the scope of the patent application. With regard to the technical features of the present disclosure, it is better understood that the present disclosure is described in detail as follows in conjunction with the description, embodiments based on the principles of the present disclosure, and drawings.

Unless otherwise defined, all technical and scientific terms described in this disclosure and the scope of the patent application have the definitions known to those of ordinary skill in the technical field to which this disclosure belongs. The singular terms "a", "an", "the", or similar terms, unless otherwise stated, may refer to more than one object. "Or", "and" and "and" used in this manual refer to "or/and" unless otherwise specified. In addition, the terms "includes" and "includes" are not open-ended conjunctions of limitation. The foregoing definitions are merely indicative of the definitions of terms and should not be construed as limitations on the subject matter of creation.

The present disclosure provides a surgical suture with improved properties, comprising a plurality of suture units, wherein each suture unit has at least 2 pairs of molded barbs and a plurality of cutting modifications, wherein each pair of molded barbs has two molds The plastic barbs extend in opposite directions to each other, and the plurality of cutting modifications are located on the 2 pairs of molding barbs. between the thorns; and there is an included angle δ between the cutting modification and another adjacent cutting modification with respect to the suture axis, and δ is between 0° and 180°.

In the processing process of the suture, molded barbs are used to increase the tensile force, and cutting is used to increase the elasticity of the suture. However, the wire will be damaged due to cutting, and the overall suture will be damaged, resulting in a decrease in the overall tensile strength of the wire. If the tensile strength is too weak, the wound tissue may not be able to maintain closure. In the present disclosure, the cutting technology is used to modify the surgical suture with molded barbs, so as to solve the problem that the current surgical suture with molded barbs will cause unevenness on the tissue surface when used.

In the present disclosure, the suture is used in the molding process by heating the mold and controlling the raw material of the surgical suture to be heated and extruded under a specific temperature, so that the surface of the suture is formed into a barb-like structure. Multiple sets of roller molds form single or multiple barbs on the surface of the same suture. A suture with molded barbs is made, and then a cutting process is used to perform cutting and modification on the aforementioned suture that has been molded.

In a specific embodiment of the present disclosure, a cutter module required for cutting and a fixture for fixing the wire are used, and the cutter is used to cut the suture with molded barbs, thereby reducing the strength and increasing the elasticity, and the suture is Optimum properties for overall operability and functionality.

In a specific embodiment, the cutting process described in the present disclosure includes the following steps: a cutter cuts the suture, the cutting angle between the cutter and the thread body is between 15 and 90 degrees, and the cutting position is between the molding barbs. On the body, and rotate along the body to produce a helical arrangement of cleavage modifications.

The sutures of the present disclosure may further comprise a coating to provide the desired properties or functions or therapeutic effects of the sutures.

According to the present disclosure, the suture body is a biocompatible material; more preferably, a bioabsorbable material.

In a specific embodiment, the material examples of the thread body include but are not limited to: polylactic acid (PLA), polycaprolactone (PCL), polyhydroxyalkanoate (PHA), polyglycolide (PGA), lactide Ester (LA), Polydioxanone Line (PDS), Poly-p-dioxanone (PPDO), Poly(Lactic Acid-co-Glycolic Acid) (PLGA) , or their combination. In a preferred embodiment, the thread is poly-p-dioxanone (PPDO).

In a particular embodiment, the coating is selected from the group of tissues: vitamin C, vitamin E, collagen, hyaluronic acid, and combinations thereof. In a preferred embodiment, another embodiment of the coating is an antibiotic.

In a particular embodiment, the bioabsorbable material is selected from the group consisting of bioceramics such as calcium carbonate, tricalcium phosphate, calcium sulfate, and combinations thereof. In another specific embodiment, the bioabsorbable material is selected from the group consisting of high molecular polymer materials such as collagen, starch, cellulose, gelatin, chitin, hyaluronic acid, and combinations thereof.

According to the present disclosure, since the surgical suture has a molded barb structure, the barb-like structure is used to draw the tissue closer, so that it does not need to be knotted when it is used for wound suturing, but the suture is placed in the body for about 4 weeks. , its tensile strength is reduced by 50%. In order to strengthen the tensile strength, the number of molded barbs can be increased. But when used, it will The problem of raised tissue surface. In the present disclosure, the problem of reducing the tensile strength of the suture caused by reducing the number of molding barbs can be improved by cutting and trimming, which can improve the elasticity of the suture and improve the problem of bulging on the tissue surface.

As shown in Figure 3, in the surgical suture of Embodiment 1, the length of the barbs 20 is less than 5 mm; in a more preferred embodiment, the length of the barbs 20 is equal to or less than 1 mm.

Referring to the surgical suture of Reference Example 1 of the previous case shown in FIG. 1 , the suture 10 has a suture unit a, and the suture unit a is 10 mm; each suture unit a includes 4 pairs of molded barbs 20 . The distance between each pair of molded barbs is 2.5 mm; the length of the barbs 20 may be equal to or less than 1 mm. There is an acute angle θ between the molded barb 20 and the suture 10, which is equal to or less than 45°. Because the main body of the wire and the barbs are many and hard, the tensile strength is strong, but it will cause bulges on the surface of the tissue when used.

Referring to Fig. 2, which provides a reference example 2 of the previous case, the cross-sectional view of the suture 10 along A-A' can be shown in Fig. 3. The suture 10 has a suture unit a, and the suture unit a is 10 mm; each suture unit a includes two pairs of molding barbs 20 . The distance between each pair of molded barbs is 10 mm; the length of the barbs 20 may be equal to or less than 1 mm. There is an acute angle θ between the molded barb 20 and the suture 10, which is equal to or less than 45°. The problem of surface bulge is improved due to the reduction of barbs, but the tensile strength is reduced, and the clinical application of wound suture is limited due to insufficient tensile force.

As shown in FIG. 4 , for an embodiment of the suture 10 of the present disclosure, a cross-sectional view of the suture 10 along B-B' can be shown in FIG. 5 . The suture unit a has two pairs of molding barbs 202, the length of each suture unit a is 10mm, the molding barbs 202 of the suture unit a are extended in the direction opposite to each other, and the adjacent ones are adjacent to each other. Between the two suture units a, the barbs 20 provided in each suture unit a are arranged in the same direction, so in the cross-sectional view of B-B', only a pair of barbs 20 can be observed.

In Embodiment 1, each suture unit a has a pair of barbs 202 (FIG. 3); in this embodiment, there are a plurality of cutting decorations 204 between the two pairs of molded barbs 202 of each suture unit a, and the number may vary. Between 2 and 6, there are 5 in this embodiment. The adjacent cutting modifications 204 are separated from each other by about 0.1-10mm; in a preferred embodiment, the distance is about 0.5-7.5mm; in a preferred embodiment, the adjacent barbs 20 are separated from each other by about 1- 5mm; spacing between cutting modifications can be the same or different.

From the cross-sectional view of B-B', the cleavage modifications 204 form an included angle δ with each other, and the included angle δ between any two adjacent cleavage modifications 204 is the same and arranged in helical symmetry. In other words, each cutting modification has an included angle δ with respect to the suture axis with respect to another adjacent cutting modification. The included angle δ can be between 0°-180°, preferably between 15°-90°, more preferably between 30°-90°.

Therefore, from the cross-sectional view of BB', the pair of molded barbs 202 and the cutting modifications 204 are substantially arranged in rotational symmetry, and there are two pairs of molded barbs 202 in the suture unit a, during which there are two pairs of molded barbs 202 Cleavage modifications 204, the number of cleavage modifications 204 is 6, and delta is 45°.

In Example 1, the length of the cutting modifications 204 may be 0.5-1 mm, preferably 0.6-0.9 mm, more preferably 0.61-0.7 mm.

Comparing the properties of the surgical sutures of Reference Example 1, Reference Example 2, and Example 1, their grip on human tissue and the degree of surface protrusion are shown in Table 1 below (score from 1 to 10, with 10 representing the most protruding surface). best, 1 means lowest):

As compared with the above, the present disclosure provides surgical sutures to solve the problem of bulging tissue surfaces caused by the lack of elasticity of the current molded barbed surgical sutures, while providing considerable grip, greatly improving the overall properties of the surgical sutures .

From the contents disclosed in the embodiments of the present specification, those with ordinary knowledge in the art to which the present disclosure pertains can obviously know that the foregoing embodiments are merely examples rather than limitations; It does not differ from the technical features of this disclosure. According to the embodiments of the specification, the present disclosure can be modified in various ways without hindering the implementation. The teachings of the various embodiments may be combined with each other without conflict. The claims provided in this specification define the scope of the disclosure, which encompasses the foregoing methods and structures and their equivalents.

a: suture unit

202: Molded Barbs

204: Cut modification

B-B': Section Tangent

Claims (21)

A surgical suture with improved properties comprising a plurality of suture units, wherein each suture unit has at least 2 pairs of molded barbs and a plurality of cutting modifications, wherein two molded barbs of each pair of molded barbs are each other Extending in the opposite direction, the plurality of cutting modifications are located between the two pairs of molding barbs; and the cutting modification and another adjacent cutting modification have an included angle δ with respect to the suture axis, and δ is between 0 ^{o- 180o} . The surgical suture of claim 1, wherein the length of the suture unit is equal to or less than 10 mm. The surgical suture of claim 1, wherein there are at least two cutting modifications between the two pairs of molded barbs. The surgical suture of claim 3, wherein there are 2-6 cutting modifications between the two pairs of molded barbs. The surgical suture of claim 4, wherein there are 5 cut modifications between the two pairs of molded barbs. The surgical suture of claim 3, wherein the plurality of cutting modifications are arranged in helical symmetry. The surgical suture of claim 1, wherein the included angle δ is between 15 ^° -90 ^° . The surgical suture of claim 3, wherein the included angle δ is between 30 ^° -90 ^° . The surgical suture of claim 1, wherein the molded barb and the suture have an acute angle Θ, where Θ is less than 90 ^° . The surgical suture of claim 9, wherein the acute angle θ is equal to or less than 45 ^° . The surgical suture of claim 10, wherein the acute angle θ is equal to or less than 30 ^° . The surgical suture of claim 1, wherein the molded barbs are equal to or less than 5 mm in length. The surgical suture of claim 12, wherein the molded barbs are 1 mm or less in length. The surgical suture of claim 1, wherein each suture unit has at least two pairs of molded barbs and a plurality of cutting modifications arranged in helical symmetry, and the helical cutting modification is adjacent to another helix There is an included angle δ between the cuts relative to the suture axis, and δ is 30-90 ^° . The surgical suture of claim 13, wherein there are 2-6 cutting modifications between the two pairs of molded barbs. The surgical suture of claim 13, wherein there are 5 cut modifications between the two pairs of molded barbs. The surgical suture of claim 1, further comprising a coating. The surgical suture of claim 1, wherein the suture body is a biocompatible material. The surgical suture of claim 1, wherein the suture body is a bioabsorbable material. The surgical suture of claim 17, wherein the coating is selected from the group consisting of vitamin C, vitamin E, collagen, hyaluronic acid, and combinations thereof. The surgical suture of claim 17, wherein the coating is an antibiotic.

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