A venous catheter is a thin, flexible tube inserted into a vein to provide access for medical treatments. It allows healthcare providers to deliver medications, fluids, or nutrients directly into the bloodstream. Venous catheters are commonly used in hospitals for patients who require long-term intravenous therapy or frequent blood draws. There are different types of venous catheters, including peripheral catheters, which are placed in smaller veins, and central venous catheters, which are inserted into larger veins near the heart. Proper placement and care of these catheters are essential to prevent complications such as infections or blood clots.