Parenteral nutrition, also known as intravenous feeding, is a method of getting nutrition into the body through the veins. It is most commonly referred to as total parenteral nutrition (TPN) and delivers nutrients such as sugar, carbohydrates, proteins, lipids, electrolytes, and trace elements to the body.
Parenteral nutrition is used to help people who cannot or should not get their core nutrients from food. Common examples include patients with cancer, Crohn's disease, and ischemic bowel disease. It is also used on patients with conditions that result from low blood flow to the bowels.