How is a tunneled central venous catheter defined?

• A. A CVAD inserted directly into the heart
• B. A CVAD inserted into a vein and tunneled under the skin
• C. A superficial catheter for short-term use
• D. A replacement for a peripheral IV line

Answer: (B)

A tunneled central venous catheter is defined as a device that is inserted into a vein and then tunneled under the skin before being placed into the central venous system. This design provides several key advantages.

First, the tunneling process reduces the risk of infection, as the catheter exit site is located away from the point of insertion, allowing for better healing and reducing exposure to external contaminants. Second, tunneling helps secure the catheter more firmly in place, which can prevent dislodgement and accidental removal. Additionally, tunneled central venous catheters are typically designed for long-term use, making them an ideal choice for patients requiring repeated access to the venous system for treatments such as chemotherapy, long-term antibiotics, or parenteral nutrition.

Other options do not accurately capture the definition of a tunneled central venous catheter. For instance, inserting a catheter directly into the heart does not involve the tunneling process and is more characteristic of a certain type of central line but not a tunneled catheter. A superficial catheter for short-term use does not encompass the tunneling aspect and typically refers to devices such as peripheral IV lines, which are not meant for prolonged access. Lastly, while a tunneled central venous catheter may serve a