Patent ID: 6146414
Filing Date: 2000-11-14
Classification: A61F

Abstract:
A medical graft comprising an implantable tube having a length and at least a first cross-sectional area and a plurality of regions defined by a substantially greater cross-sectional area than the first cross-sectional area, wherein said plurality of regions of greater cross-sectional area have a minimum diameter and a maximum diameter, wherein each of said regions progress gradually from said minimum diameter to said maximum diameter and back to said minimum diameter; and said plurality of regions further contain a shield in communication with said tube wherein said shield is substantially less penetrable than is said tube so that a needle cannulated into said tube will meet greater resistance when said needle impinges upon said shield and said shield is oriented at a substantially posterior aspect of said tube with respect to said needle penetration site so that said needle enters said tube at a location substantially diametrically opposite said shield.