Sheathing for reinforcing natural veins for use as surgical implants in the form of textile netting that is configured by forming a seamless, tubular, essentially pile-less, knit fabric and has loops having large, open apertures having essentially polygonal shapes is made available. ...http://www.google.com/patents/US20040215309?utm_source=gb-gplus-sharePatent US20040215309 - Covering element for veins, method for the production and use thereof in surgery
