Composite self-retaining sutures and method
First Claim
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1. A surgical suture comprising an elongated filament and a plurality of retainers wherein:
- the elongated filament is a composite filament including, a core portion formed of a first material and a sheath portion formed of a second material;
the plurality of retainers is formed along and within the sheath; and
one of the first material and second material shrinks relative to the other of the first and second material thereby causing the plurality of retainers to elevate into a position suitable for engaging a tissue.
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Abstract
A self-retaining suture comprises a composite filament. The filament has retainers on the surface such that the filament can engage and retain tissue without knots. The filament comprises at least two materials having different properties. A surface material of the filament has properties which enhance the formation, elevation and/or deployment of the retainers. A core material of the filament has properties which enhance the tensile strength of the filament. The surgical filament is thin and flexible and may be used for suturing. Methods for manufacturing the filament and retainers are also described.
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10 Claims
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1. A surgical suture comprising an elongated filament and a plurality of retainers wherein:
the elongated filament is a composite filament including, a core portion formed of a first material and a sheath portion formed of a second material; the plurality of retainers is formed along and within the sheath; and one of the first material and second material shrinks relative to the other of the first and second material thereby causing the plurality of retainers to elevate into a position suitable for engaging a tissue. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
Specification