When oral intake is medically contraindicated (e.g., dysphagia, unconsciousness), alternative feeding modalities are employed:
Enteral Nutrition (Tube Feeding): Administration of nutrients into the gastrointestinal tract via a tube, either nasogastrically or directly into the stomach/intestine via gastrostomy.
Parenteral Nutrition (Intravenous Feeding): Intravenous infusion of nutrients, bypassing the alimentary canal. This approach is indicated when the digestive system is non-functional.