RESUMEN
BACKGROUND: Access to up-to-date and understandable health information is a growing citizen demand, as well as an ethical duty and a legal regulation. Written information reinforces information transmitted orally during the consultation and improves recall capacity. Adenoamigdalectomy is an intervention that affects a high number of patients, the majority from the child population that has a high emotional sensitivity, and it is experienced by parents with considerable anxiety. An informative guide on adenoamigdalectomy was elaborated and validated. The aim of this article is to describe the process of elaborating the document, emphasizing its validation and results. MATERIAL AND METHODS: The document was validated in three phases: A) Clinical content validated by professionals with a checklist and a consensus meeting; B) Analysis of grammatical legibility according to the Flesch index; C) Validation of lexical legibility with citizens by means of a validation guide and interviews. RESULTS: The validation by professionals and citizens was highly positive. The professionals stressed the accuracy of the content and corrected some imprecisions. They made suggestions concerning format, writing style and length. The citizens stressed understandable language, resolution of doubts, respectful tone and their satisfaction with the initiative. They also differed on aspects such as their opinion of the document's length. CONCLUSIONS: The validation of informative documents by both professionals and patients is a process of great interest. Lack of agreement in their analyses makes it clear why it is important to include both sectors. The document was improved by their contributions.