WebMD Scientific American® Medicine
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Enteral nutrition is the process of nourishing a patient with a liquid diet of defined composition, usually given through a nasogastric, nasointestinal, gastrostomy, or jejunostomy tube. Parenteral nutrition is the administration of nutrients directly into the bloodstream through a central venous catheter or by peripheral infusion. When the only source of nutrient intake is via the parenteral route, it is called total parenteral nutrition (TPN). The term nutritional support refers to the use of enteral or parenteral nutrition rather than to an oral diet, with or without supplements.
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WebMD Scientific American® Medicine
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