Vascular insertion sheath with stiffened tip
First Claim
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1. A tissue puncture closure assembly, comprising:
- a tissue puncture closure device having a distal and a proximal end;
a vascular insertion sheath having a distal and a proximal end;
wherein the distal end of the insertion sheath comprises a tip portion that is stiffer than insertion sheath portions adjacent to the tip portion.
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Abstract
The present invention provides a method and apparatus for sealing a subcutaneous tissue puncture. The method and apparatus reduce the occurrence of anchor shuttling by stiffening a tip or end portion of an insertion sheath that acts as a one-way valve to a closure device anchor. The stiffening of the tip reduces shuttling by reducing or eliminating the tendency of prior insertion sheath tips from puckering and creating a gap into which the anchor may reenter. The method of stiffening may take on many different mechanisms, several of which are disclosed.
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Citations
41 Claims
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1. A tissue puncture closure assembly, comprising:
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a tissue puncture closure device having a distal and a proximal end;
a vascular insertion sheath having a distal and a proximal end;
wherein the distal end of the insertion sheath comprises a tip portion that is stiffer than insertion sheath portions adjacent to the tip portion. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 13)
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12. A tissue puncture closure assembly according to claim 12 wherein the corrugated section is disposed transverse to a longitudinal axis of the insertion sheath.
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14. A vascular insertion sheath, comprising:
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a flexible tubular member having a longitudinal axis, a distal end, and a proximal end;
a hemostatic valve coupled to the proximal end of the tubular member;
a fold at the distal end of the tubular member, the fold comprising a higher stiffness coefficient than the tubular member. - View Dependent Claims (15, 16, 17, 18, 19, 20, 21)
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- 22. A method of reducing anchor shuttle in a tissue puncture closure assembly, comprising stiffening a tip portion of an insertion sheath receptive of a tissue puncture closure device.
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33. A method of making a vascular insertion sheath, comprising:
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providing a flexible tubular member receptive of a puncture closure device;
tapering an end portion of the flexible tubular member;
folding a section of the end portion into a concave depression;
stiffening at least a portion of the concave depression. - View Dependent Claims (34, 35, 36, 37, 38, 39)
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40. A tissue puncture closure assembly, comprising:
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a closure device for partial insertion into and sealing of an internal tissue wall puncture, the closure device comprising;
a carrier tube having an anchor nest at a distal end;
a filament extending through the carrier tube;
an anchor attached to the filament at the distal end of the carrier tube and seated in the anchor nest;
an insertion sheath receptive of the carrier tube of the closure device, the insertion sheath comprising;
a flexible tubular member having a longitudinal axis, a distal end, and a proximal end;
a hemostatic valve coupled to the proximal end of the tubular member;
a fold at the distal end of the tubular member, the fold comprising a higher stiffness coefficient than the tubular member.
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41. A method of sealing a tissue puncture in an internal tissue wall accessible through a percutaneous incision, comprising:
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providing a tissue puncture closure device comprising a carrier tube with a filament extending therethrough, the filament connected at a distal end of the carrier tube to an anchor, the anchor seated in a nest disposed in the carrier tube, the filament also connected to a sealing plug located proximal of the anchor for disposition and anchoring about the tissue puncture;
inserting the tissue puncture closure device through an insertion sheath having a stiffened tip portion into the percutaneous incision;
deploying the anchor into the tissue puncture;
withdrawing the closure device from the percutaneous incision;
tamping the sealing plug toward the anchor.
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Specification