[Bariatric surgery: what is the ideal length of the preoperative track?].

Bariatric surgery not only has significant somatic implications but also imposes substantial behavioural and psychological changes. It is therefore essential to check previously that the potential candidate has not psychosomatic contraindications and its psychoocial context to allow adaptation to the changes requested by the intervention. After this preliminary phase the multidisciplinary support must provide a complete and adequate preparation for potential intervention, and ensure a follow-up to life in these patients. Bariatric support is therefore an ongoing process, which involves, in the preoperative phase, three steps: (1) to inform, (2) to assess and (3) prepare candidates.