A central line is a type of catheter that is inserted into a large vein, typically in the neck, chest, or groin. It is used to administer medications, fluids, or nutrients directly into the bloodstream. Central lines are often used for patients who require long-term treatment or have difficult venous access. These lines can also be used for monitoring blood pressure and drawing blood samples. Central lines are important in medical settings, especially for patients undergoing treatments like chemotherapy or those in intensive care. Proper care and maintenance are essential to prevent infections and complications associated with catheters.