An IV bag is a medical device used to deliver fluids, medications, or nutrients directly into a patient's bloodstream. It typically contains a sterile solution, such as saline or glucose, and is connected to a thin tube called an IV catheter that is inserted into a vein. This method allows for quick absorption and is often used in hospitals, clinics, and emergency situations. IV bags come in various sizes and types, depending on the treatment required. They are essential for hydration, administering medications, and providing nutrition to patients who cannot eat or drink normally. Proper handling and monitoring of IV bags are crucial to ensure patient safety and effectiveness of treatment.