Dialysis catheters are specialized tubes used to access the bloodstream for patients undergoing dialysis. They allow for the removal of waste and excess fluid from the body when the kidneys are not functioning properly. These catheters can be placed in large veins, typically in the neck or chest, and are designed for short-term or long-term use. There are two main types of dialysis catheters: temporary catheters, which are used for short periods, and permanent catheters, which are intended for long-term access. Proper care and maintenance of these catheters are essential to prevent infections and ensure effective dialysis treatment.