These are usually administered via a tube. This is placed through the nose in the stomach (gastric tube) or in the small intestine (duodenal or jejunal tube). If nutrition via the gastrointestinal tract is not possible, nutritional solutions are administered via the veins. However, this is usually a temporary measure; the natural route via the gastrointestinal tract is preferred. If artificial feeding is necessary for several weeks, the specialists can insert a so-called PEG (percutaneous endoscopic gastrostomy) tube directly through the skin into the stomach. This allows safe and convenient access for the supply of nutrients.