An objective score for intubation grading the severity , that is the severity of the intubations , as well as the frequency of unanticipated difficult intubation , is measured for each group.Primary outcome measures are the fraction of unanticipated difficult and easy intubations.The database is programmed so that the registration of the SARI is mandatory for the intervention group but invisible to controls.Data recruitment was commenced in October 2012 and ended in ultimo December 2013 .