Patent ID: 6962575
Filing Date: 2005-11-08
Classification: A61M

Abstract:
1. A single access dialysis needle system comprising: a cannula having a proximal end and a distal end, and a lumen extending longitudinally between the proximal end and the distal end, the lumen including a distal opening at the distal end and a proximal opening at the proximal end such that fluid may exit and enter the cannula, a sheath arranged circumferentially around the cannula to form an annular lumen between the cannula and the sheath, the sheath having a proximal end and a distal end, the sheath further includes a lateral port located substantially between the proximal end and distal end of the sheath and in fluid communication with the annular lumen which provides for the flow of fluid between an outer surface of the sheath and the annular lumen, and a barrier capable of being deployed to extend substantially radially from the sheath to block or substantially obstruct fluid flow, radial expansion of the barrier being controlled by movement of the sheath, wherein the distal opening of the cannula is distal to the barrier and the port of the sheath is proximal to the barrier, wherein the lumen at the proximal end of the cannula and the annular lumen are adapted for connection to a blood hemodialyzer.