WO2021241868A1 - 다각형의 단면을 갖는 스토퍼를 일 말단에 가지는 의료용 실 및 이의 제조방법 - Google Patents
다각형의 단면을 갖는 스토퍼를 일 말단에 가지는 의료용 실 및 이의 제조방법 Download PDFInfo
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- WO2021241868A1 WO2021241868A1 PCT/KR2021/003623 KR2021003623W WO2021241868A1 WO 2021241868 A1 WO2021241868 A1 WO 2021241868A1 KR 2021003623 W KR2021003623 W KR 2021003623W WO 2021241868 A1 WO2021241868 A1 WO 2021241868A1
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- WIPO (PCT)
- Prior art keywords
- stopper
- section
- medical thread
- main body
- cross
- Prior art date
Links
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 11
- 230000035515 penetration Effects 0.000 claims abstract description 17
- 230000005484 gravity Effects 0.000 claims description 19
- 238000001816 cooling Methods 0.000 claims description 14
- 238000000034 method Methods 0.000 claims description 13
- 229920002463 poly(p-dioxanone) polymer Polymers 0.000 claims description 9
- 239000000622 polydioxanone Substances 0.000 claims description 9
- 239000004677 Nylon Substances 0.000 claims description 8
- 239000004743 Polypropylene Substances 0.000 claims description 8
- 238000010438 heat treatment Methods 0.000 claims description 8
- 229920001778 nylon Polymers 0.000 claims description 8
- 229920001610 polycaprolactone Polymers 0.000 claims description 8
- 239000004632 polycaprolactone Substances 0.000 claims description 8
- -1 polypropylene Polymers 0.000 claims description 8
- 229920001155 polypropylene Polymers 0.000 claims description 8
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims description 8
- 239000004810 polytetrafluoroethylene Substances 0.000 claims description 8
- 229920000954 Polyglycolide Polymers 0.000 claims description 7
- 239000004633 polyglycolic acid Substances 0.000 claims description 7
- 229920001577 copolymer Polymers 0.000 claims description 4
- 238000002844 melting Methods 0.000 claims description 4
- 230000008018 melting Effects 0.000 claims description 4
- 239000004626 polylactic acid Substances 0.000 claims description 4
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 claims description 3
- 239000000853 adhesive Substances 0.000 abstract 1
- 230000001070 adhesive effect Effects 0.000 abstract 1
- 210000001519 tissue Anatomy 0.000 description 17
- 238000002347 injection Methods 0.000 description 12
- 239000007924 injection Substances 0.000 description 12
- 238000012360 testing method Methods 0.000 description 9
- 230000000052 comparative effect Effects 0.000 description 6
- 239000000463 material Substances 0.000 description 5
- 238000012546 transfer Methods 0.000 description 5
- 238000005259 measurement Methods 0.000 description 4
- 230000000704 physical effect Effects 0.000 description 3
- 230000002457 bidirectional effect Effects 0.000 description 2
- 239000002861 polymer material Substances 0.000 description 2
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- 230000002745 absorbent Effects 0.000 description 1
- 239000002250 absorbent Substances 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 238000004873 anchoring Methods 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 210000004204 blood vessel Anatomy 0.000 description 1
- 210000000988 bone and bone Anatomy 0.000 description 1
- 238000011161 development Methods 0.000 description 1
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- 239000000155 melt Substances 0.000 description 1
- 210000003205 muscle Anatomy 0.000 description 1
- 210000005036 nerve Anatomy 0.000 description 1
- 230000037368 penetrate the skin Effects 0.000 description 1
- 239000010695 polyglycol Substances 0.000 description 1
- 229920000151 polyglycol Polymers 0.000 description 1
- 210000003491 skin Anatomy 0.000 description 1
- 210000002435 tendon Anatomy 0.000 description 1
- 238000012549 training Methods 0.000 description 1
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Images
Classifications
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/04—Surgical instruments, devices or methods, e.g. tourniquets for suturing wounds; Holders or packages for needles or suture materials
- A61B17/0487—Suture clamps, clips or locks, e.g. for replacing suture knots; Instruments for applying or removing suture clamps, clips or locks
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/04—Surgical instruments, devices or methods, e.g. tourniquets for suturing wounds; Holders or packages for needles or suture materials
- A61B17/06—Needles ; Sutures; Needle-suture combinations; Holders or packages for needles or suture materials
- A61B17/06166—Sutures
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
- A61L17/00—Materials for surgical sutures or for ligaturing blood vessels ; Materials for prostheses or catheters
- A61L17/04—Non-resorbable materials
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
- A61L17/00—Materials for surgical sutures or for ligaturing blood vessels ; Materials for prostheses or catheters
- A61L17/06—At least partially resorbable materials
- A61L17/10—At least partially resorbable materials containing macromolecular materials
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C51/00—Shaping by thermoforming, i.e. shaping sheets or sheet like preforms after heating, e.g. shaping sheets in matched moulds or by deep-drawing; Apparatus therefor
- B29C51/08—Deep drawing or matched-mould forming, i.e. using mechanical means only
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C51/00—Shaping by thermoforming, i.e. shaping sheets or sheet like preforms after heating, e.g. shaping sheets in matched moulds or by deep-drawing; Apparatus therefor
- B29C51/26—Component parts, details or accessories; Auxiliary operations
- B29C51/30—Moulds
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C51/00—Shaping by thermoforming, i.e. shaping sheets or sheet like preforms after heating, e.g. shaping sheets in matched moulds or by deep-drawing; Apparatus therefor
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- A61B17/04—Surgical instruments, devices or methods, e.g. tourniquets for suturing wounds; Holders or packages for needles or suture materials
- A61B17/0401—Suture anchors, buttons or pledgets, i.e. means for attaching sutures to bone, cartilage or soft tissue; Instruments for applying or removing suture anchors
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- A61B17/0401—Suture anchors, buttons or pledgets, i.e. means for attaching sutures to bone, cartilage or soft tissue; Instruments for applying or removing suture anchors
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- A61B17/04—Surgical instruments, devices or methods, e.g. tourniquets for suturing wounds; Holders or packages for needles or suture materials
- A61B17/0469—Suturing instruments for use in minimally invasive surgery, e.g. endoscopic surgery
- A61B2017/0477—Suturing instruments for use in minimally invasive surgery, e.g. endoscopic surgery with pre-tied sutures
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- A—HUMAN NECESSITIES
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- A61B17/04—Surgical instruments, devices or methods, e.g. tourniquets for suturing wounds; Holders or packages for needles or suture materials
- A61B17/06—Needles ; Sutures; Needle-suture combinations; Holders or packages for needles or suture materials
- A61B17/06166—Sutures
- A61B2017/06176—Sutures with protrusions, e.g. barbs
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- A61B17/04—Surgical instruments, devices or methods, e.g. tourniquets for suturing wounds; Holders or packages for needles or suture materials
- A61B17/06—Needles ; Sutures; Needle-suture combinations; Holders or packages for needles or suture materials
- A61B17/06166—Sutures
- A61B2017/0619—Sutures thermoplastic, e.g. for bonding, welding, fusing or cutting the suture by melting it
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2031/00—Other particular articles
- B29L2031/731—Filamentary material, i.e. comprised of a single element, e.g. filaments, strands, threads, fibres
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2031/00—Other particular articles
- B29L2031/753—Medical equipment; Accessories therefor
Definitions
- the present invention relates to a medical thread having a stopper having a polygonal cross section at one end and having excellent end attachment strength and penetration resistance, and a method for manufacturing the same.
- medical threads are used for connecting or suturing damaged areas of tissues such as skin, muscles, tendons, internal organs, bone tissue, nerves, blood vessels, etc. is being used as
- a barbed thread for resolving this problem has been developed (eg, Korean Patent Application Laid-Open No. 10-2019-0061944), and the barbed thread has thorns formed in both directions. It may be classified into a bidirectional type and a unidirectional type having only one direction.
- a fixing device is not required by sutures in both directions at the center of the incision, but in the case of the latter, unidirectional type, Since the protrusion inhibits movement only in the opposite direction, a means for fixing the medical thread is required at the end of the incision site.
- the end In order to fix the end of the unidirectional type barbed thread for medical use, the end is molded into a loop shape, and the tissue is stitched with a suture needle to bring the loop closer to the tissue. , by making another stitch, passing the suture needle through the loop, and then tightening it, gives an anchoring effect. That is, in the case of a conventional unidirectional type barbed thread for medical use, it is inconvenient to pass a suture needle through a small loop, and this process takes a lot of time.
- the present invention is to solve the problems of the prior art as described above, and it is possible to fix the end of the medical thread to the skin tissue in a short time, and at the same time to provide a medical thread having excellent end adhesion strength and penetration resistance, and a method for manufacturing the same aim to do
- the body and a stopper connected to one end of the main body, wherein one end of the main body to which the stopper is connected has a circular cross-section, the main body extends in the longitudinal direction, and the stopper has a polygonal shape in the portion connected to the main body.
- a medical thread having a cross-section, wherein at least two of the distances from the center of gravity of the polygonal cross-section of the stopper to each vertex of the stopper are greater than the radius of the circular cross-section of one distal end of the body.
- two or more of the distances from the center of gravity of the polygon that is the cross-section of the stopper to each vertex may be 1.5 times or more of the radius of the circular cross-section of one end of the body.
- the stopper may be disposed perpendicular to the longitudinal direction of the adjacent main body, and may have a polygonal pole or polygonal pyramid shape.
- the thickness of the stopper may be 0.1mm ⁇ 5mm.
- the length of one side of the polygonal cross-section that the stopper has in the connection portion with the main body may be 1mm ⁇ 5mm.
- the edge of the stopper may have a tapered shape.
- the adhesion strength (end adhesion strength) between the body and the stopper may be 2 kgf or more.
- the penetration resistance of the stopper may be 0.15 kgf or more.
- the main body and the stopper may be the same or different copolymer materials, and each independently polydioxanone (PDO), polycaprolactone (PCL), polylactic acid (PLA), polyglycol It may include at least one copolymer selected from acid (PGA), polytrimethylcarbonate (PTMC), polypropylene (PP), nylon (Nylon), and polytetrafluoroethylene (PTFE).
- PDO polydioxanone
- PCL polycaprolactone
- PLA polylactic acid
- Pglycol It may include at least one copolymer selected from acid (PGA), polytrimethylcarbonate (PTMC), polypropylene (PP), nylon (Nylon), and polytetrafluoroethylene (PTFE).
- the medical thread may be one in which a suture needle is coupled to the other end of the body rather than to the distal end to which the stopper is connected.
- the surface of the body may include a plurality of protrusions protruding outward.
- the method of manufacturing the medical thread may further include a position adjusting step of adjusting the relative position of the stopper with respect to one distal end of the molten body.
- the main body and the stopper in the step of separating from the mold after cooling the main body and the stopper, may be cooled for a time of 5 to 120 seconds at an amount of the cooler of 0.01 to 3 mpa.
- the temperature of the mold for melting the body may be 50 ⁇ 400 °C.
- the medical thread according to the present invention has superior end attachment strength and penetration resistance compared to a thread having a circular stopper having the same cross-sectional area, the end can be more firmly fixed to the skin tissue by using the same.
- FIG. 1 exemplarily shows various cross-sections of a stopper that a medical thread according to the present invention may have (a dotted line portion in the figure exemplarily shows a circular cross-section of the main body of the thread).
- FIG. 2 exemplarily shows a method of fixing a stopper to a measuring rubber for measuring end attachment strength in an embodiment of the present invention.
- FIG. 3 exemplarily shows a method of fixing a stopper to a skin pad for measurement in order to measure the penetration resistance in an embodiment of the present invention.
- the medical thread of the present invention the main body; and a stopper connected to one end of the main body, wherein one end of the main body to which the stopper is connected has a circular cross-section, the main body extends in a longitudinal direction, and the stopper has a polygonal cross-section at a portion connected to the main body, , two or more, more specifically, three or more of the distances from the center of gravity of the polygonal cross-section of the stopper to each vertex of the stopper, is characterized in that it is greater than the radius of the circular cross-section of the one end of the body.
- two or more of the distances from the center of gravity of the polygon, which is the cross-section of the stopper to each vertex may be 1.5 times or more of the radius of the circular cross-section of one end of the body, more specifically, 2 times or more , 2.5 times or more, 3 times or more, 3.5 times or more, 4 times or more, 4.5 times or more, or 5 times or more.
- two or more of the distances from the center of gravity of the polygon that is the cross-section of the stopper to each vertex may be 15 times or less of the radius of the circular cross-section of one end of the body, and more specifically, 14.5 times or less, 14 times or less. or less, 13.5 times or less, 13 times or less, 12.5 times or less, or 12 times or less.
- two or more (preferably three or more) of the distances from the center of gravity of the polygon that is the cross-section of the stopper to each vertex may be 1.5 to 15 times the radius of the circular cross-section of one end of the body, More specifically, it may be 2 to 15 times, even more specifically, 5 to 15 times, and even more specifically, 5 to 12 times.
- the stopper may be disposed perpendicular to the longitudinal direction of the adjacent main body, and may have a polygonal pole or polygonal pyramid shape.
- a polygon that is a cross-section of the stopper may be, for example, a triangle, a square, a pentagon, or a hexagon, or a polygon of various shapes such as a star shape, a cross shape, etc. it may be
- the stopper may have a polygonal pole or polygonal pyramid shape corresponding to the polygonal cross section.
- the thickness of the stopper may be 0.1mm ⁇ 5mm, more specifically, may be 0.1mm ⁇ 3mm, or 0.1mm ⁇ 1mm. If the thickness of the stopper is too thin than the above level, the stopper may not be stopped in the skin tissue and may be separated.
- the length of one side of the polygonal cross section that the stopper has in the connection portion with the body may be 1 mm to 5 mm, more specifically 1 mm to 4 mm or 2 mm to 4 mm, and more specifically It may be 1 mm to 3 mm or 2 mm to 3 mm.
- the attachment strength (end attachment strength) between the body and the stopper may be 2 kgf or more, and more specifically, 2.1 kgf or more, 2.2 kgf or more, 2.3 kgf or more, 2.4 kgf or more, or 2.5 kgf or more.
- the upper limit of the end attachment strength is not particularly limited, and may be, for example, 10 kgf or less, 9 kgf or less, 8 kgf or less, or 7 kgf or less, but is not limited thereto.
- the penetration resistance of the stopper may be 0.15 kgf or more, and more specifically, 0.16 kgf or more, 0.17 kgf or more, 0.18 kgf or more, 0.19 kgf or more, or 0.2 kgf or more.
- the upper limit of the penetration resistance of the stopper is not particularly limited, and may be, for example, 1 kgf or less, 0.9 kgf or less, 0.8 kgf or less, 0.7 kgf or less, 0.6 kgf or less, or 0.5 kgf or less, but is not limited thereto.
- the end attachment strength when using a yarn having a size of 30 according to USP (US Pharmacopedia of the United States of America) as the body of the medical thread, the end attachment strength may be 2.5 kgf or more, and the penetration resistance may be 0.2 kgf or more, which is an excellent property compared to a yarn having the same standard yarn and a circular stopper having the same cross-sectional area.
- the end attachment strength may be 4.5 kgf or more, and the penetration resistance of the stopper may be 0.4 kgf or more, which is the same standard It has superior physical properties compared to yarn of yarn and yarn having a circular stopper of the same cross-sectional area.
- the end attachment strength when a yarn having a size of 01 according to USP is used as the body of the medical thread, the end attachment strength may be 5.2 kgf or more, and the penetration resistance of the stopper may be 0.3 kgf or more, which is the same standard It has superior physical properties compared to yarn of yarn and yarn having a circular stopper of the same cross-sectional area.
- the end attachment strength when a yarn having a size of 02 according to USP is used as the body of the medical thread, the end attachment strength may be 5.2 kgf or more, and the penetration resistance of the stopper may be 0.3 kgf or more, which is the same standard It has superior physical properties compared to yarn of yarn and yarn having a circular stopper of the same cross-sectional area.
- the body and the stopper may be formed of the same material or different materials, and each independently polydioxanone (PDO), polycaprolactone (PCL), polylactic acid (PLA), polyglycolic acid (PGA), polytrimethyl carbonate (PTMC), polypropylene (PP), nylon (Nylon), may include one or more copolymers selected from polytetrafluoroethylene (PTFE).
- PDO polydioxanone
- PCL polycaprolactone
- PLA polylactic acid
- PGA polyglycolic acid
- PTMC polytrimethyl carbonate
- PP polypropylene
- nylon nylon
- PTFE polytetrafluoroethylene
- polydioxanone PDO
- polycaprolactone PCL
- polylactic acid PLA
- polyglycolic acid PGA
- polytrimethyl carbonate PTMC
- PP polypropylene
- nylon Nylon
- PTFE polytetrafluoroethylene
- the body and the stopper may be formed of the same material.
- the stopper may be formed of a material in which the body is first formed and then the body is melted.
- the medical thread may be one in which a suture needle is coupled to the other end of the body rather than to the distal end to which the stopper is connected.
- the suture needle may be used without limitation in its type as long as it is inserted into the skin tissue and can penetrate the skin tissue.
- two or more of the distances from the center of gravity of the polygon that is the cross-section of the stopper to each vertex may be 1.5 times or more of the radius of the outer diameter of the suturing needle (ie, circular cross-section of the needle), more specifically, 2 times or more, and even more specifically, 2.5 times or more.
- two or more of the distances from the center of gravity of the polygon, which is the cross-section of the stopper to each vertex may be 7 times or less the radius of the outer diameter of the suture needle, and more specifically, may be 6 times or less, and more specifically may be 5.5 times or less.
- two or more (preferably three or more) of the distances from the center of gravity of the polygon, which is the cross-section of the stopper to each vertex may be 1.5 to 7 times the radius of the outer diameter of the suturing needle, and more More specifically, it may be 2 to 6 times, and more specifically, it may be 2.5 to 5.5 times.
- the surface of the body may include a plurality of protrusions protruding outward.
- the body may be formed in an elongated shape extending in the longitudinal direction, and may have a flexible property that may be deformed by an external force.
- the longitudinal direction may be understood as a direction in which the central axis of the body extends.
- a plurality of protrusions obliquely inclined in the longitudinal direction may be provided on the outside of the main body, and the plurality of protrusions may have a predetermined angle with respect to the longitudinal direction of the main body, and may be formed on the surface of the main body.
- the plurality of protrusions may have an angle of 10° to 45° with respect to the longitudinal direction.
- the projections having a preset angle are formed on the surface of the body, so that the projections can be easily caught in the skin tissue.
- the plurality of protrusions may be formed along one direction (unidirectional type).
- the medical thread of the present invention may be a unidirectional type barbed thread (barbed thread).
- the first protrusion may be disposed on the surface of one side of the body, and the second and third protrusions may be circumferentially spaced apart from the first protrusion and disposed on the other side surface of the body.
- the first protrusion, the second protrusion, and the third protrusion may be provided in plurality, and may be arranged in a line along the longitudinal direction of the body, respectively.
- the first protrusion, the second protrusion, and the third protrusion may be disposed to have different angles from each other.
- the medical thread according to the present invention may be a thread used for suturing a tissue damaged by surgery or trauma, or a thread inserted into skin tissue to tighten the skin.
- the edge formed by the stopper may be formed in a tapered shape.
- the pressure applied to the skin tissue due to the edge of the stopper may be dispersed, thereby reducing the operator's pain.
- the stopper may be disposed perpendicular to the longitudinal direction of the body. That is, the cross section and the body of the stopper may be perpendicular to each other, and thus may be easily caught in the skin tissue.
- the center of the stopper may meet the longitudinal center of the body.
- the main body may be located in the center of the stopper, so that the medical thread can be caught in the skin tissue in a balanced way.
- the above-described protrusion may be formed along one direction of the body to suppress movement of the medical thread in one direction, and a stopper may be provided at one end of the body to suppress movement of the medical thread in the other direction. That is, the medical thread may be fixed to the target tissue by the protrusion and the stopper.
- the body is first prepared and melted by heating one end of the body. Specifically, when one end of the body is melted, after the body is placed in a transfer unit capable of transferring the body, as the transfer unit moves, the main body is injected into a heated mold, and one end of the body is heated and melted can be
- the step of preparing the body may further include forming a plurality of protrusions on the surface of the body.
- the injection speed at which the body is injected into the mold by the transfer unit may be 0.1 to 2 mm/s.
- productivity may decrease, and if it is more than 2 mm/s, the injection rate is faster than the rate at which the body is melted and melted, so that the body may be bent or the injection may not be possible.
- the injection rate at which the body is injected into the mold by the transfer unit may be 0.1 to 1 mm/s, or 0.1 to 0.7 mm/s.
- an appropriate injection rate was checked according to the raw material and size of the body, and the relationship is shown in Table 1 below. As shown in Figure 4, the injection speed was adjusted in the range of 0.4mm/s to 1.1mm/s for each diameter size of the body, and after injection into the mold, the degree of bending of the body was visually inspected. and if the body did not bend, it was judged as "suitable".
- the diameter size of the body means the diameter size of the yarn that is not barbed.
- the mold may be heated using a heater, and the temperature of the heated mold may be 50 to 400°C. If the temperature of the mold is less than 50 °C, the main body does not melt, and if it exceeds 400 °C, the main body melts into the mold, cooling is reduced, or a problem of sticking to the mold may occur.
- the temperature of the heated mold may be 150 ⁇ 250 °C.
- one end of the molten body is injected into a mold having a preset shape to form a stopper at one end of the body.
- the mold having a preset shape may have the aforementioned polygonal pole or polygonal pyramid shape.
- the relative position adjustment between the main body and the stopper may be implemented by adjusting the position of the mold or the transfer unit that moves the main body.
- the body and the stopper are cooled and then separated from the mold, so that the medical seal in which the stopper is formed at one end of the body can be manufactured.
- the amount of cooler in the cooling step, is 0.01 to 4.5 mpa, 0.01 to 4 mpa, 0.01 to 3.5 mpa, 0.01 to 3 mpa, 0.01 to 2 mpa, 0.01 to 1 mpa, 0.01 to 0.5 mpa, 0.01 to 0.3 mpa , or 0.01 to 0.2 mpa. If the amount of the cooler is less than 0.01 mpa, the cooling may not be sufficient and the molded product may not be discharged.
- the amount of the cooler may be 0.01 mpa or more, 0.02 mpa or more, 0.03 mpa or more, 0.04 mpa or more, 0.05 mpa or more, 0.06 mpa or more, 0.07 mpa or more, 0.08 mpa or more, or 0.09 mpa or more, and 4.5 mpa or less.
- 4.0 mpa or less 3.5 mpa or less, 3.0 mpa or less, 2.5 mpa or less, 2.0 mpa or less, 1.5 mpa or less, 1.0 mpa or less, 0.5 mpa or less, 0.4 mpa or less, 0.3 mpa or less, 0.2 mpa or less, or 0.1 mpa or less .
- the cooling time in the cooling step, may be 5 to 120 seconds, more specifically, 5 to 100 seconds, 5 to 80 seconds, 5 to 60 seconds, 5 to 50 seconds, 10 to 100 seconds, 15 to 80 seconds, 20 to 60 seconds, 25 to 50 seconds, 30 to 50 seconds, 25 to 45 seconds, 30 to 45 seconds, or 35 to 45 seconds. If the cooling time is less than 5 seconds, an unsuitable shape may be formed, and if it exceeds 120 seconds, the production rate may be reduced. According to one embodiment of the present invention, the amount of the cooler is 0.1 mpa or less, and the cooling time may be 35 to 45 seconds.
- the injection speed from the body to the mold may vary depending on the size of the mold and the raw material of the body.
- the injection speed for each size of the main body is fixed to PDO 0.8 mm/s, PGCL 0.6 mm/s, the amount of cooling air 0.5 mpa, the waiting time after injection is fixed to 5 seconds, and when the stopper is manufactured, the stopper according to the cooling time
- the shape and adhesion strength were measured, and the results are shown in Table 2 below.
- Good/unsuitable end attachment strength was evaluated according to the criteria shown in Table 3. That is, when the end attachment strength was measured to be higher than the permission standard in Table 3, it was judged as "excellent", and when it was measured to be low, it was judged to be "inappropriate".
- the diameter of the body below means the diameter of the non-barbing yarn.
- the medical yarn of Example having an equilateral triangle cross-section stopper was prepared by heating the end of the yarn shown in Table 4 (0.5 mpa cooler amount condition).
- the length of one side of the equilateral triangle cross-sections of the stoppers of Examples 1, 2 and 4 was 3 mm, and the length of one side of the equilateral triangle cross-sections of the stoppers of Examples 3 and 5 was 2 mm.
- the diameter of the circular cross section of the stoppers of Comparative Examples 1, 2 and 4 was 2.38 mm, and the diameter of the circular cross section of the stoppers of Comparative Examples 3 and 5 was 1.62 mm.
- Example 1 the distance from the center of gravity of the equilateral triangle that is the cross section of the stopper to each vertex was 5.7 to 7 times the radius of the circular cross section of one end of the body to which the stopper was connected.
- Example 2 the distance from the center of gravity of the equilateral triangle that is the cross section of the stopper to each vertex was 8.6 to 9.9 times the radius of the circular cross section of one end of the body to which the stopper was connected.
- Example 3 the distance from the center of gravity of the equilateral triangle that is the cross section of the stopper to each vertex was 9.2 to 11.6 times the radius of the circular cross section of one end of the body to which the stopper was connected.
- Example 4 the distance from the center of gravity of the equilateral triangle that is the cross section of the stopper to each vertex was 8.6 to 7 times the radius of the circular cross section of one end of the body to which the stopper was connected.
- Example 5 the distance from the center of gravity of the equilateral triangle that is the cross section of the stopper to each vertex was 9.2 to 11.6 times the radius of the circular cross section of one end of the body to which the stopper was connected.
- the skin pad was fixed to the lower part of the tensile tester, and the other side was fixed to the upper grip before measurement.
- the medical thread according to the present invention exhibits superior end adhesion strength and penetration resistance compared to the thread having a circular stopper of the same cross-sectional area.
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Abstract
Description
Claims (15)
- 본체; 및 상기 본체의 일 말단부에 연결된 스토퍼를 포함하는 의료용 실로서,상기 스토퍼가 연결된 본체의 일 말단부는 원형의 단면을 갖고,상기 본체는 길이방향으로 연장되며,상기 스토퍼는 본체와 연결된 부분에서 다각형의 단면을 갖고,상기 스토퍼의 다각형 단면의 무게 중심점에서 스토퍼 각 꼭지점까지의 거리들 중 2개 이상이 상기 본체 일 말단부의 원형 단면의 반지름보다 큰,의료용 실.
- 제1항에 있어서, 상기 스토퍼의 단면인 다각형의 무게 중심점에서 각 꼭지점까지의 거리들 중 2개 이상이 상기 본체 일 말단부의 원형 단면의 반지름의 1.5배 이상인, 의료용 실.
- 제1항에 있어서, 상기 스토퍼는, 인접하는 상기 본체의 길이 방향에 대해 수직으로 배치되고, 다각 기둥 또는 다각뿔 형상을 가지는 것인, 의료용 실.
- 제1항에 있어서, 상기 스토퍼의 두께는 0.1mm ~ 5mm인, 의료용 실.
- 제1항에 있어서, 상기 스토퍼가 상기 본체와의 연결 부분에서 가지는 다각형 단면의 한 변의 길이는 1mm ~ 5mm인, 의료용 실.
- 제1항에 있어서, 상기 스토퍼의 모서리는 테이퍼진 모양인 것인, 의료용 실.
- 제1항에 있어서, 상기 본체와 스토퍼 사이의 부착강력(말단 부착강력)은 2 kgf 이상인, 의료용 실.
- 제1항에 있어서, 상기 스토퍼의 관통저항은 0.15 kgf 이상인, 의료용 실.
- 제1항에 있어서, 상기 본체와 상기 스토퍼는 각각 독립적으로 폴리디옥사논(PDO), 폴리카프로락톤(PCL), 폴리락트산(PLA), 폴리글리콜산(PGA), 폴리트리메틸카보네이트 (PTMC), 폴리프로필렌(PP), 나일론(Nylon), 폴리테트라플루오로에틸렌(PTFE) 중 선택된 하나 이상의 공중합체를 포함하는, 의료용 실.
- 제1항에 있어서, 상기 스토퍼가 연결된 말단부가 아닌 본체의 다른 쪽 말단부에 봉합용 바늘이 결합된 것인, 의료용 실.
- 제1항에 있어서, 상기 본체의 표면은 외측으로 돌출된 복수 개의 돌기를 포함하는 것인, 의료용 실.
- 길이 방향으로 연장되는 본체를 준비하는 단계;상기 본체의 일 말단부를 가열하여 용융시키는 단계;용융된 상기 본체의 일 말단부가 기 설정된 모양을 갖는 몰드에 주입되어 상기 본체의 단부에 스토퍼를 형성하는 단계; 및상기 본체 및 상기 스토퍼를 냉각시킨 후 상기 몰드로부터 분리하는 단계;를 포함하며,상기 스토퍼가 연결된 본체의 일 말단부는 원형의 단면을 갖고,상기 스토퍼는 상기 본체와의 연결 부분에서 다각형의 단면을 가지며,상기 스토퍼의 단면인 다각형의 무게 중심점에서 각 꼭지점까지의 거리들 중 2개 이상이 상기 본체 일 말단부의 원형 단면의 반지름보다 큰,의료용 실의 제조 방법.
- 제12항에 있어서, 상기 용융된 본체의 일 말단부에 대하여 상기 스토퍼의 상대적 위치를 조절하는 위치 조절 단계를 더 포함하는, 의료용 실의 제조 방법.
- 제12항에 있어서, 상기 본체와 스토퍼를 냉각시킨 후 몰드로부터 분리하는 단계에서는, 0.01~3 mpa의 냉각기량에서 5~120초의 시간 동안 상기 본체와 스토퍼를 냉각하는, 의료용 실의 제조 방법.
- 제12항에 있어서, 상기 본체의 일 말단부를 가열하여 용융시키는 단계에서, 상기 본체를 용융시키는 몰드의 온도는 50~400℃인, 의료용 실의 제조 방법.
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CN202180006473.0A CN114727816A (zh) | 2020-05-27 | 2021-03-24 | 在一个末端具备具有多边形截面的止动件的医用线及其制造方法 |
JP2022572549A JP7445789B2 (ja) | 2020-05-27 | 2021-03-24 | 多角形の端面を有するストッパーを一端に有する医療用糸及びその製造方法 |
AU2021281884A AU2021281884B2 (en) | 2020-05-27 | 2021-03-24 | Medical thread having polygonal cross-sectioned stopper on one end, and manufacturing method for same |
EP21812763.7A EP4159140A4 (en) | 2020-05-27 | 2021-03-24 | MEDICAL THREAD WITH STOPPER WITH POLYGONAL CROSS-SECTION AT ONE END AND MANUFACTURING METHOD THEREFOR |
US17/923,388 US20230190266A1 (en) | 2020-05-27 | 2021-03-24 | Medical thread having polygonal cross-sectioned stopper on one end, and manufacturing method for same |
CA3176982A CA3176982A1 (en) | 2020-05-27 | 2021-03-24 | Medical thread having polygonal cross-sectioned stopper on one end, and manufacturing method for same |
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KR1020200063530A KR102614996B1 (ko) | 2020-05-27 | 2020-05-27 | 다각형의 단면을 갖는 스토퍼를 일 말단에 가지는 의료용 실 및 이의 제조방법 |
KR10-2020-0063530 | 2020-05-27 |
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KR (1) | KR102614996B1 (ko) |
CN (1) | CN114727816A (ko) |
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CN114727816A (zh) | 2022-07-08 |
EP4159140A1 (en) | 2023-04-05 |
AU2021281884A1 (en) | 2022-11-24 |
AU2021281884B2 (en) | 2024-02-15 |
JP2023529312A (ja) | 2023-07-10 |
CA3176982A1 (en) | 2021-12-02 |
US20230190266A1 (en) | 2023-06-22 |
KR102614996B1 (ko) | 2023-12-18 |
JP7445789B2 (ja) | 2024-03-07 |
KR20210146581A (ko) | 2021-12-06 |
EP4159140A4 (en) | 2024-05-22 |
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