[Enteral and parenteral nutrition in gastroenterology].

Malnutrition is state of organism with import of energy and other nutritional factors lower then consumption, leading in certain period, to deviation from normal, or changes in some functions. Patients with gastrointestinal diseases are prone to malnutrition states because of basic functions in absorption of nutritional substances. Most common causes are inflammatory bowel diseases (ulcerative colitis and Crohns disease especially), different digestive fistulas (proximal parts), chronic pancreatitis, chronic liver diseases and malignant tumors of digestive tube.