EP0210281A1
Expired / Lapsed
EP
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A method of using a filament for manufacturing a suture or ligature
Assignee: Wyeth Holdings LLC
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Filing: 1979-02-20
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Granted: —
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Expires: 1999-02-20
Abstract
Abstract This invention provides synthetic non-absorbable sutures and ligatures comprised of block copolymers which may be represented by the following general formula: Where R and R, are the same or different straight or branched chain alkyl groups of 1 to 9 carbon atoms; R 2 is selected from phenylene and cyclohexylene; and n is the number of repeating units and is defined by R, R 1 and R 2 and thetotal moleuclar weight of the copolymer; and the block (B) comprising from about 30% to 95% of the copolymer. The sutures and ligatures are preferably in monofilamentary form.
Inventors
- 👤 Donald Samuel Kaplan
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-29 15:56
CPC Classifications
A; A61; A61L; A61L17/00; A61L17/04
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
216 words
A method of using a filament formed by extrusion of a block copolymer containing polymeric blocks (A) and polymeric blocks (B), wherein the polymeric blocks (A) consist of a polyalkylene ether having a number average molecular weight of from 500-3000 and have the formula: wherein R is a straight or branched chain alkylene group of from 1 to 9 carbon atoms, R 2 is 1,4-phenylene or cyclohexylene and n is the number of repeating units; and wherein the polymeric blocks (B) are the reaction product of (i) an aromatic dicarboxylic acid or a cycloaliphatic dicarboxylic acid and (ii) a short chain aliphatic or cycloaliphatic diol, and have the formula: wherein R 1 is a straight or branched chain alkylene group of from 2 to 10 carbon atoms or a cyclic group having the formula: and R 2 is 1, 4-phenylene or cyclohexylene: said polymeric blocks (B) constituting from 30 to 95 percent by weight of said copolymer; for manufacturing a non-absorbable sterile surgical suture or ligature by drawing the filament for adjusting the tensile strength as defined by a straigt pull to a value of at least 3515 kg/cm 2 (50,000 psi) and the flexual modulus; to a value of less than 24610 kg/cm 2 (3.5 x 10 5 psi) and by subsequent sterilization and packaging.
Claim 2
Independent Claim
216 words
A method of using a filament formed by extrusion of a block copolymer containing polymeric blocks (A) and polymeric blocks (B), wherein the polymeric blocks (A) consist of a polyalkylene ether having a number average molecular weight of from 500-3000 and have the formula: wherein R is a straight or branched chain alkylene group of from 1 to 9 carbon atoms, R 2 is 1,4-phenylene or cyclohexylene and n is the number of repeating units; and wherein the polymeric blocks (B) are the reaction product of (i) an aromatic dicarboxylic acid or a cycloaliphatic dicarboxylic acid and (ii) a short chain aliphatic or cycloaliphatic diol, and have the formula: wherein R 1 is a straight or branched chain alkylene group of from 2 to 10 carbon atoms or a cyclic group having the formula: and R 2 is 1, 4-phenylene or cyclohexylene: said polymeric blocks (B) constituting from 30 to 95 percent by weight of said copolymer; for manufacturing a non-absorbable sterile surgical suture or ligature by drawing the filament for adjusting the tensile strength as defined by a straigt pull to a value of at least 3515 kg/cm 2 (50,000 psi) and the flexual modulus; to a value of less than 24610 kg/cm 2 (3.5 x 10 5 psi) and by subsequent sterilization and packaging.
Claim 3
Dependent Claim
18 words
A method according to claim 1, characterized in that subsequent to the drawing step, the filiment is annealed.
Claim 4
Independent Claim
27 words
A method of use according to claims 1 or 2, characterized in that the polymeric block (B) constitutes from about 50 % to 85% of the copolymer.
Claim 5
Independent Claim
25 words
A method according to claims 1 or 2, characterized in that the polymeric block (B) constitutes from about 55 to 80 % of the copolymer.
Claim 6
Independent Claim
18 words
A method according to the preceeding claims, characterized in that R is propylene and R 1 is butylene.
Claim 7
Independent Claim
16 words
A method according to one of the preceeding claims, characterized in that R 2 is 1,4-phenylene.
Claim 8
Independent Claim
21 words
A method according to one of the proceeding claims, characterized in that the suture or ligature is produced in monofilament form.
Claim 9
Independent Claim
19 words
A method according to one of the preceeding claims, characterized in that the filament is attached to a needle.
Claim 10
Independent Claim
22 words
A method according to one of the proceeding claims, characterized in that the suture or ligature is packaged in a sterile enclosure.
References Cited (Backward Citations)
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