Intravenous catheters inserted directly through the skin for up to several weeks into major veins are known as what?

The correct response is nontunneled percutaneous venous access devices. These types of catheters are specifically designed for insertion through the skin directly into large veins, such as the subclavian or jugular veins, and are intended for short to medium-term use, typically up to several weeks. They allow for immediate access to the central venous system for the administration of fluids, medications, or for blood draws.

Nontunneled catheters are distinct in that they do not have a tunnel or a subcutaneous portion; they are placed directly into the vein, which can lead to faster access but carries certain risks, such as a higher chance of infections, especially if left in place for extended periods. This distinguishes them from tunneled catheters, which are designed for longer-term use and have a section that is placed under the skin to minimize the risk of infection.

While peripheral IVs are used for access to smaller veins and are not typically suited for long-term use or for major veins, PICC lines (Peripherally Inserted Central Catheters) are a type of nontunneled central line that can be drawn from a peripheral vessel and advanced to a central location but are often maintained for longer durations.