Surgery practice, as day cases, is as old as surgery itself, but actually because of the assembly of present-day circumstances, specially the shortage of ward beds, make necessary to gain advantage of resources available. The new requests for medical attendance as well the technological novelties have influenced at Hospital de Cruces to establish the Outpatients Surgical Unit. A good organisation allows the Adeno-tonsillectomy surgery with little risk in these Unities. We describe our experience, the advantages and the complications of this behavior.