BG65325B1 - Surgical thread and method for its preparation - Google Patents

Surgical thread and method for its preparation Download PDF

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Publication number
BG65325B1
BG65325B1 BG107164A BG10716402A BG65325B1 BG 65325 B1 BG65325 B1 BG 65325B1 BG 107164 A BG107164 A BG 107164A BG 10716402 A BG10716402 A BG 10716402A BG 65325 B1 BG65325 B1 BG 65325B1
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BG
Bulgaria
Prior art keywords
fibers
polyamide
thread
cross section
elementary
Prior art date
Application number
BG107164A
Other languages
Bulgarian (bg)
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BG107164A (en
Inventor
Ангел ДЕМИРЕВ
Original Assignee
Фирма "Тонзос-95" Ад
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Фирма "Тонзос-95" Ад filed Critical Фирма "Тонзос-95" Ад
Priority to BG107164A priority Critical patent/BG65325B1/en
Publication of BG107164A publication Critical patent/BG107164A/en
Publication of BG65325B1 publication Critical patent/BG65325B1/en

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Abstract

The invention finds application in human and veterinary medicine. The thread is woven from polyamide fibers with antimicrobial coating. It has increased physico-mechanical properties and with the possibility to fix the assemblies made thereon, providing greater access of the antimicrobial coating to the core of the elementary fibers. The bundle of polyamide filaments is formed from glossy elementary parallel fibers with a profile cross-section, joined together by "air twisting". The profile cross-section of the fibers is executed as a trilobal and pentobal cross-section. By the method, the feedstock of a polyamide fiber bundle formed by parallel fibers of a profile cross-section is fed by cops. The parallelism of the component elementary fibers of the polyamide strands is impaired by applying air twisting to 300 pieces. per linear meter, resulting in parallel fibers being merged. Each outgoing thread is coiled on a corresponding "doll". "Dolls" are sequentially stacked in a number and intertwined. The paid surgical suture is wound up with individual hanks, which are washed and placed in bathtubs for antimicrobial treatment.

Description

Technical field

The invention relates to a surgical thread and method for its production, in particular to knit surgical threads of polyamide fibers. The invention finds application in human and veterinary medicine.

BACKGROUND OF THE INVENTION

Known is a surgical thread made of polyamide PA-6, whose constituent smooth parallel fibers are twisted by a known classical method, with a number of twigs up to 700 pcs. per linear meter. The surgical thread produced is treated with an antimicrobial coating of the type: polyvinyl alcohol with a thickness in the range of 5 to 50 micrometer, followed by chitosan with a thickness in the range of 5 to 30 micrometer [1].

Closest to the proposed surgical thread is a thread made of polyamide PA-6, whose constituent smooth parallel fibers are pre-twisted by a known classical method. The surgical threads thus produced are treated with an antimicrobial coating of the type 8-oxyquinoline or 8-oxyquinaldine and their derivatives [2].

A method is known for the production of surgical thread, in which composite smooth parallel fibers, previously twisted by a known classical method, with a number of twigs of up to 200 pcs, are made of polyamide cops fibers. per linear meter. Subsequently, the filaments of the starting material are broken in parallel with their pre-twisting, each thread being wound into a corresponding "doll", the dolls are arranged in series and intertwined, and the thread is immersed in a pot for antimicrobial treatment with potassium salt at 5 -nitrox [3].

The known surgical threads make it difficult to evenly penetrate the antimicrobial coating to the core of the thread, and their patency during machining is also not sufficient. Also, due to the smoothness of the thread, it becomes difficult to form a fixed knot, which requires 5-6 times tying to provide the necessary knot strength.

Surgical sutures and methods for their production from high strength polyamide fiber and smooth monofilament are known to produce the finest surgical sutures for cosmetic and similar operations in which the scarring requirements are high [4, 5, 6 and 7].

These known solutions are of limited use, since many of the synthetic thermoplastic polymers that are used as surgical fibers have a reduced elasticity to be used in the form of monofilaments.

SUMMARY OF THE INVENTION

It is an object of the invention to enhance the physico-mechanical properties of a woven surgical thread and to provide both the fixation of the nodes made thereon and the greater access of the antimicrobial coating to the core of the filaments of the thread.

The problem is solved by a surgical thread woven of polyamide fibers with subsequent antimicrobial coating.

According to the invention, the bundle of polyamide filaments is formed of elementary parallel fibers with a profile cross section joined together by "air-twisting".

The profile cross section of the elementary parallel fibers is made as a triangular cross section.

Also, the profile cross section can be in the form of a pentagonal cross section.

In addition, the elementary parallel fibers are brilliant.

At the same time the air twisting is in the range up to 300 pcs. per linear meter.

The problem is also solved by a method for the production of a surgical thread made of polyamide fibers, comprising the following technological operations: the raw material of polyamide filaments formed from parallel fibers comes from cops, followed by a violation of the parallelism of the constituent filaments of the polyamide fibers, followed by each emerging thread is wound into a corresponding "doll", which "dolls" are then arranged

65325 Bl are in corresponding numbers and intertwine. The knit thread is wound into separate branches, which are washed and placed in antimicrobial treatment tubs.

According to the invention, the polyamide filament bundle is formed from parallel fibers with a profile cross-section, and in order to break the parallelism of the constituent elementary fibers, air twisting is applied, whereby the parallel fibers are joined.

The advantages of the invention are that due to the violation of the parallelism of the filaments of elemental polyamide fibers by air-twisting, greater access of the antimicrobial coating to the core of the elementary fibers of the made surgical threads, as well as better passage of the filaments during the thread technological process. Also, by combining the elementary filaments by means of air-twisting, a greater uniformity of the filaments in the weave is achieved, which contributes to the smoothness of the performed surgical suture.

In addition, the profile cross section of the threads prevents them from slipping more, increasing their strength and fixing the knot. To increase the strength of the threads and the fixation of the knot also contributes to the additional quality of the profile polyamide threads, namely: shiny. By combining the above qualities in the manufacture of the surgical sutures according to the invention, the basic parameters corresponding to the requirements of the European Pharmacopoeia (European Standard for Medicinal Products) to the characteristics of the surgical sutures used in surgical operations are achieved.

As air-twisting improves the flowability of the threads in the process, as a result, both the greater uniformity of the threads in diameter during weaving and the increased smoothness of the performed surgical suture are achieved. The use of glossy profiled polyamide threads contributes to the enhancement of the strength and fixation of surgical nodes, which is extremely important for the success of various types of surgery.

Description of the attached figures

1 is a table showing the physico-mechanical parameters of the surgical thread according to the invention.

Examples of implementation and application of the invention

The surgical thread is a polyamide thread woven with a subsequent antimicrobial coating. According to the invention, the bundle of polyamide fibers is formed of elementary parallel fibers with a profile cross-section joined together by air-twisting.

The profile cross section of the elementary parallel fibers is made in the form of a trilobal cross section or in the form of a pentabal cross section.

In addition, the elementary parallel fibers are brilliant.

In aerial twisting, the filaments are twisted and interwoven at one point only, with points spaced apart and up to 300 pieces per linear meter.

The method of manufacturing the above-described surgical thread according to the invention involves the following sequence of technological operations: the raw material of polyamide filaments formed by parallel fibers with a profile cross-section comes from cops. An air twist is applied to the bundle of polyamide fibers, which brings the parallel fibers together. Each emerging single strand is wound into a corresponding "doll", which, in turn, is arranged sequentially in an appropriate number of knits. This is followed by weaving the thread and winding individual branches, which are washed and placed in tubs for antimicrobial treatment.

The table shows the values of the physico-mechanical parameters of the surgical thread made according to the invention.

In the table, the first two columns indicate:

METRIC - N Thread of the European Pharmacopoeia

65325 Bl

USP - the US Pharmacopoeia designation most commonly used by surgeons in practice.

The surgical sutures according to the invention meet the basic parameters as required by the European Pharmacopoeia of Strength and Fixed Knot. Greater access to the antimicrobial coating is provided to the core of the elementary fibers, which will make their use widespread.

Claims (6)

  1. Claims
    A surgical thread comprising knitted polyamide fibers with a subsequent antimicrobial coating, characterized in that the bundle of polyamide fibers is formed by elementary parallel fibers with a profile cross section joined together by air-twisting.
  2. A thread according to claim 1, characterized in that the profile cross section of the elementary parallel fibers is made in the form of a trilobal cross section.
  3. A thread according to claim 1, characterized in that the profile cross section is made in the form of a pentagonal cross section.
  4. A thread according to claim 1, characterized in that the elemental profile fibers are shiny.
  5. A thread according to claim 1, characterized in that the air twisting is in the range up to 300 pieces per linear meter.
  6. A method for the manufacture of a surgical thread according to claim 1, comprising feeding the raw material of polyamide flakes from cops, further disrupting the parallelism of the constituent filaments of the polyamide threads, after which each emerging thread is wound on a corresponding "doll", which " dolls ”are arranged sequentially in number and intertwined, the knit thread is wound into separate branches, which are washed and placed in baths for antimicrobial treatment, characterized in that the incoming bundle The polyamide filaments are formed by parallel fibers with a profile cross section, and in order to break the parallelism of the constituent elementary fibers, air twisting is applied, as a result of which the parallel fibers are combined.
BG107164A 2002-10-03 2002-10-03 Surgical thread and method for its preparation BG65325B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
BG107164A BG65325B1 (en) 2002-10-03 2002-10-03 Surgical thread and method for its preparation

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
BG107164A BG65325B1 (en) 2002-10-03 2002-10-03 Surgical thread and method for its preparation

Publications (2)

Publication Number Publication Date
BG107164A BG107164A (en) 2004-05-31
BG65325B1 true BG65325B1 (en) 2008-02-29

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
BG107164A BG65325B1 (en) 2002-10-03 2002-10-03 Surgical thread and method for its preparation

Country Status (1)

Country Link
BG (1) BG65325B1 (en)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BG26037A1 (en) * 1978-03-21 1979-02-15
EP0132131A1 (en) * 1983-07-15 1985-01-23 Ethicon Inc. Surgical filaments from block copolyetheramides
EP0423807A1 (en) * 1989-10-20 1991-04-24 E.I. Du Pont De Nemours And Company Low shrinkage, high tenacity poly (epsilon-caproamide) yarn and process for making same
EP0553883A1 (en) * 1992-01-30 1993-08-04 United States Surgical Corporation Polyamide monofilament suture manufactured from higher order polyamide
EP0553882A1 (en) * 1992-01-30 1993-08-04 United States Surgical Corporation Polyamide monofilament suture and process for its manufacture
RU2073528C1 (en) * 1993-12-08 1997-02-20 Юрий Денисович Семчиков Suture material

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BG26037A1 (en) * 1978-03-21 1979-02-15
EP0132131A1 (en) * 1983-07-15 1985-01-23 Ethicon Inc. Surgical filaments from block copolyetheramides
EP0423807A1 (en) * 1989-10-20 1991-04-24 E.I. Du Pont De Nemours And Company Low shrinkage, high tenacity poly (epsilon-caproamide) yarn and process for making same
EP0553883A1 (en) * 1992-01-30 1993-08-04 United States Surgical Corporation Polyamide monofilament suture manufactured from higher order polyamide
EP0553882A1 (en) * 1992-01-30 1993-08-04 United States Surgical Corporation Polyamide monofilament suture and process for its manufacture
RU2073528C1 (en) * 1993-12-08 1997-02-20 Юрий Денисович Семчиков Suture material

Also Published As

Publication number Publication date
BG107164A (en) 2004-05-31

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