What is the primary use of a peripherally inserted central catheter (PICC line)?

A peripherally inserted central catheter (PICC line) is specifically designed for the administration of long-term intravenous therapy. This type of catheter can be inserted into a peripheral vein, typically in the arm, and advanced until the tip is located in the central venous system, usually near the heart. This placement allows for the delivery of medications, nutrients, and fluids over an extended period—often weeks to months—without the need for repeated venipunctures.

Because of its design and placement, the PICC line is particularly advantageous for patients who require long-term treatment, such as those undergoing chemotherapy, prolonged antibiotic therapy, or total parenteral nutrition. In contrast, other uses mentioned, such as short-term medication delivery or emergency fluid resuscitation, are not the primary function of a PICC line, as they typically involve different types of access devices more suitable for those specific situations. Frequent blood sampling is also a possibility with a PICC line; however, this is not its main purpose, making long-term intravenous therapy the most fitting and primary use.