Implantable devices with reduced needle puncture site leakage

Details Implantable devices with reduced needle puncture site leakage Implantable devices with reduced needle puncture site leakage

2004-11-29

2011-10-04

Matthews, William H. (Department: 3774)

Prosthesis (i.e., artificial body members), parts thereof, or ai

Arterial prosthesis

Having plural layers

Reexamination Certificate

active

08029563

ABSTRACT:
A prosthetic implantable device that offers a reduction in fluid loss when the device is punctured, such as by a dialysis needle or suture needle, and the needle is subsequently removed. The device may be made to be thin and flexible, and with longitudinal stretch, in order that it also offers good handling and kink resistance to a surgeon. While the device is preferably of tubular form, flat sheets or other forms may also be made. The device includes inner and outer layers of a porous material having a microstructure of nodes interconnected by bent fibrils, and having void spaces between adjacent bent fibrils. The inner and outer layers are joined by an elastomeric adhesive that may interpenetrate the void spaces of the adjacent surfaces of the inner and outer layers, that is, the inner surface of the outer layer and the outer surface of the inner layer. Optionally, a middle layer of an elastomeric material may also be provided, joined to the inner and outer porous layers by the interpenetrating elastomeric adhesive. The device is preferably a vascular graft and more preferably a vascular graft for kidney dialysis.

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