The Full form of IV is Intravenous Therapy. Intravenous Therapy (IV) is a therapy that delivers liquid substances directly into a vein (intra + ven + ous). The intravenous route of administration can be used for injections (with a syringe at higher pressures) or infusions (typically using only the pressure supplied by gravity). IVs are commonly referred to as drips. The intravenous route is the fastest way to deliver medications and fluid replacement throughout the body, because the circulation carries them. Intravenous therapy may be used for fluid replacement (such as correcting dehydration), to deliver medications, to correct electrolyte imbalances, and for blood transfusions. A Peripheral Intravenous (PIV) line is used on peripheral veins (the veins in the arms, hands, legs and feet). This is the most common type of IV therapy used. Central IV lines have their catheters that are advanced through a vein and empty into a large central vein (a vein within the torso), usually the superior vena cava, inferior vena cava or even the right atrium of the heart. Examples of conditions treated with IV infusion include Ankylosing spondylitis, Behcet’s disease, Cancer, Common variable immunodeficiency, Crohn’s disease, Dermatomyositis, Guillain-Barre syndrome, Iritis, Juvenile rheumatoid arthritis, Multiple sclerosis, Rheumatoid arthritis and many more.