Method of compacting silk sutures by stretching

Details Method of compacting silk sutures by stretching Method of compacting silk sutures by stretching

1973-07-31

1977-03-29

White, Robert F.

Plastic and nonmetallic article shaping or treating: processes

Mechanical shaping or molding to form or reform shaped article

Reshaping running or indefinite-length work

1283355, B29C 1702, A61L 1700

Patent

active

040149730

ABSTRACT:
Braided silk surgical sutures having increased tensile strength and knot strength are prepared by (1) presoaking conventionally-prepared unstretched braided silk sutures in a non-corrosive liquid (preferably water) for at least about 30 minutes to wet the silk fibers, (2) stretching the presoaked sutures while the same are immersed in a non-corrosive liquid (preferably water), and then (3) drying the stretched silk sutures while maintaining the stretched length and not allowing shrinkage to occur during drying. The wet-stretching method of the invention makes possible the stretching of braided silk sutures to a greater extent than that obtainable by conventional hot-stretching techniques, up to about 21/2 times greater, without damage to the sutures. The wet-stretched sutures of the invention have greater tensile strength and knot strength than the prior art hot-stretched sutures of comparable diameter.

REFERENCES:
patent: 2918346 (1959-12-01), Paulsen
patent: 2948581 (1960-08-01), Cummings, Jr.
patent: 3098696 (1963-07-01), Ball et al.
patent: 3259681 (1966-07-01), Bull et al.
patent: 3424164 (1969-01-01), Block et al.
patent: 3567817 (1971-03-01), Spiller
patent: 3657409 (1972-04-01), Ram et al.

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