Temporary access Central venous<unk> s used for temporary access are typically used for less than 21 days. These types of<unk> s are usually smaller in size, placed directly in the vein, and are two or three lumens in design. The third lumen is useful for administration of fluids, antibiotics, medicines, or contrast without having to find other places for intravenous access. This type of<unk>  is useful for initiating venous access for acute renal failure patients quickly for<unk>  before a permanent<unk>  is inserted for long term access. Permanent access The lumens of this type of<unk>  is larger, have a cuff that tunnel under the skin away from the venous insertion site with only two lumens. The<unk>  course under the skin helps to prevent infection going into bloodstream, as seen in temporary<unk> s.
Dialysis catheter
Peritoneal dialysis
Artificial kidney
Ultrafiltration 
Peritoneovenous shunt
Hemofiltration
Hickman line
Iridodialysis