A vascular access device is provided that has a device lumen valve and a safety valve feature to prevent leakage of blood from a lumen of such device. The vascular access device includes a sheath which may have an outer tube and structure defining a device lumen located therein. The access device further...http://www.google.com/patents/US6592544?utm_source=gb-gplus-sharePatent US6592544 - Vascular access devices having hemostatic safety valve
