[Enteral nutrition: ways of access and formulas].

Enteral nutrition is a very adequate method to feed those patients who can not receive food by oral means, to be used only when their gastrointestinal functions are preserved and carry out a proper assimilation of nutrients. Starting from these facts, this article analyzes the various access ways which can be used in enteral nutrition, and the most commonly used enteral nutrition formulas, noting their possible classifications. The nutritional modules and the material necessary to employ this form of feeding, as well as the administrative guidelines, are also presented in this article.