Which feature distinguishes a central line from a peripheral line?

The distinguishing feature that differentiates a central line from a peripheral line is the type of vein into which it is inserted. Central lines are typically inserted into larger central veins, such as the superior vena cava or the femoral vein, allowing for direct access to the central circulation. This is essential for certain medical treatments, such as administering large volumes of fluids or medications that may irritate smaller veins.

Peripheral lines, on the other hand, are inserted into smaller peripheral veins, primarily found in the arms or hands. While peripheral lines are suitable for short-term use and less invasive treatments, central lines are preferred for long-term therapy, total parenteral nutrition, or when peripheral access is difficult or insufficient.

While the thickness of the catheter, length of the line, and material composition can vary between types of lines, they are not definitive features that categorize a line as central or peripheral. The key differentiator remains the anatomical location of the vein where the catheter is placed.