A catheter for hemodialysis comprises a flexible catheter tube defining a plurality of separate lumens. The catheter defines an arc angle of generally U-shape in its natural, unstressed configuration. Thus, the catheter may be implanted with a distal catheter portion residing in a vein of the patient,...http://www.google.com.au/patents/US7695450?utm_source=gb-gplus-sharePatent US7695450 - Multiple lumen catheter for hemodialysis
