Introduction
The aim of the ESPEN guidelines on enteral nutrition (EN) is to evaluate the evidence on EN in different indications and serve as orientation tools for distinct decisions in clinical practice. Therefore, the single chapters focus on specific questions relevant to the respective indication. More general questions, which might be important in all or several indications are dealt with in this introductory chapter to avoid repetition. Furthermore, the terminology and definitions used throughout these guidelines are also explained in this chapter.