Source: Madeline Lassche, MSNEd, RN and Katie Baraki, MSN, RN, College of Nursing, University of Utah, UT

Central venous access devices (CVAD), commonly known as central lines or central catheters, are large-bore intravenous (IV) catheters that are introduced into the central circulation. Typically, CVADs terminate in the superior vena cava, just outside of the right atrium of the heart, but they may also terminate in any one of the great veins (i.e., aorta, inferior vena cava, brachiocephalic vein, pulmonary artery, internal iliac vein, or common femoral vein). Patients may need a CVAD for any number of reasons. CVADs allow for the rapid infusion of fluids to treat significant hypovolemia or shock. They are also beneficial when administering vasoactive medications, highly concentrated medications, total parenteral nutrition (TPN), or chemotherapy, because the increased blood volume in these areas allows for the hemodilution of these potentially caustic or reactive agents. Patients who must receive multiple non-compatible IV medications, those that require long-term IV medications, or those with limited vascular access may also require the placement of a CVAD. These devices may be tunneled (i.e., inserted into a vein at one location and tunneled under the skin to emerge through the skin at another site) or non-tunneled (i.e., inserted through the skin and directly into a vein). Examples of CVADs include multi-lumen central venous catheters, pulmonary artery catheters, dialysis catheters, port-a-cath, and peripherally inserted central catheters (PICC).

Because CVADs are introduced into the central circulation, it is important that they are cared for using strict aseptic technique to prevent central line associated blood infections (CLABSI). Nursing standards of care mandate using "sterile technique" when changing CVAD dressings. The Centers for Disease Control recommends changing CVAD dressings at least every 2 days for gauze dressings and at least every 7 days for transparent dressings on adult patients. For pediatric patients, the CDC recommends using clinical judgment to determine the appropriate timing of CVAD dressing changes, as the risk of line removal during the dressing change may outweigh the benefits.

This video presents the process of changing CVAD dressings using sterile techniques.