SELF-RETAINING SUTURES HAVING EFFECTIVE HOLDING STRENGTH AND TENSILE STRENGTH
First Claim
Patent Images
1. A wound-closure device comprising:
- a strand of monofilament suture, having a first end, a second end, a longitudinal axis, a surface and a diameter (D), having a minimum knot pull strength requirement (S);
a plurality of angled cuts made in the surface of the strand and spaced along the strand;
the plurality of angled cuts made in the surface of the strand defining a plurality of tissue-retaining elements spaced along the strand;
the plurality of tissue-retaining elements being adapted to permit movement of the strand through tissue in a direction of the first end and resist movement of the strand through tissue in an opposite direction;
each tissue-retaining element having a tip separated from the strand and a base connected to the strand;
each tissue-retaining element having a length no less than about 0.8 diameters (0.8*D), measured tip-to-base along the longitudinal axis;
the tissue-retaining elements being spaced at a distance no larger than two diameters (2*D), measured tip-to-tip along the longitudinal axis; and
the wound-closure device having a tensile strength no less than about 80% of the USP minimum knot pull strength requirement (S) for monofilament suture of the diameter (D).
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Abstract
A barbed suture with a first end and a second end and a body with a plurality of barbs extending from the body. Each barb causes the suture to resist movement in an opposite direction from which the barb faces. Projections extend from said suture. The projections can also engage tissue. The barbs cover the projections when the first end of the suture is moved in tissue and exposes the projections in order to engage tissue when the suture is moved in the direction of the second end through tissue.
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Citations
20 Claims
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1. A wound-closure device comprising:
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a strand of monofilament suture, having a first end, a second end, a longitudinal axis, a surface and a diameter (D), having a minimum knot pull strength requirement (S); a plurality of angled cuts made in the surface of the strand and spaced along the strand; the plurality of angled cuts made in the surface of the strand defining a plurality of tissue-retaining elements spaced along the strand; the plurality of tissue-retaining elements being adapted to permit movement of the strand through tissue in a direction of the first end and resist movement of the strand through tissue in an opposite direction; each tissue-retaining element having a tip separated from the strand and a base connected to the strand; each tissue-retaining element having a length no less than about 0.8 diameters (0.8*D), measured tip-to-base along the longitudinal axis; the tissue-retaining elements being spaced at a distance no larger than two diameters (2*D), measured tip-to-tip along the longitudinal axis; and the wound-closure device having a tensile strength no less than about 80% of the USP minimum knot pull strength requirement (S) for monofilament suture of the diameter (D). - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A self-retaining suture comprising:
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a strand of polymer, having a first end, a second end, a longitudinal axis, a surface and a diameter (D), having a minimum knot pull strength requirement (S); a plurality of angled cuts made in the surface of the strand and spaced along the strand; the plurality of angled cuts made in the surface of the strand defining a plurality of protrusions spaced along the strand each protrusion having an apex separated from the strand and a base connected to the strand; the plurality of tissue-retaining elements being adapted to permit movement of the strand through tissue in a direction of the first end and resist movement of the strand through tissue in an opposite direction; each tissue-retaining element having a length no less than about 0.8 diameters (0.8*D), measured apex-to-base along the longitudinal axis; the tissue-retaining elements being spaced at a distance no larger than two diameters (2*D), measured apex-to-apex along the longitudinal axis; and the wound-closure device having a tensile strength no less than about 80% of the USP minimum knot pull strength requirement (S) for suture of the diameter (D). - View Dependent Claims (12, 13, 14, 15, 16, 17, 18)
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19. A wound-closure device comprising:
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a strand of bioabsorbable polymer suture, having a first end, a second end, a longitudinal axis, a surface and a diameter (D), having a minimum knot pull strength requirement (S); a plurality of angled cuts made in the surface of the strand and spaced along the strand; the plurality of angled cuts made in the surface of the strand defining a plurality of protrusions spaced along the strand each protrusion having an apex separated from the strand and a base connected to the strand; the plurality of tissue-retaining elements being adapted to permit movement of the strand through tissue in a direction of the first end and resist movement of the strand through tissue in an opposite direction; each tissue-retaining element having a length no less than about 0.8 diameters (0.8*D), measured apex-to-base along the longitudinal axis; the tissue-retaining elements being spaced at a distance a spacing no larger than two diameters (2*D), measured apex-to-apex along the longitudinal axis; wherein the diameter (D) is less than 1 mm; and
the tensile strength is greater than 7 lbs. - View Dependent Claims (20)
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Specification