Tracheotomy is one of most performed surgical procedures to assure airway by making a hole in front of the trachea in ICU. There are studies in literature that show the surgical procedures to the neck area cause a surgical stress, an increase in thyroid hormones. The procedure may due to miscellaneous clinical signs by altering in hormone levels, even creating a thyroid storm. As far as we are aware, there is no study on the impact of tracheotomy on PCT concentration. The aim of the study was to evaluated whether tracheotomy affects PCT concentrations in patients without sepsis. Moreover, the investigators assessed whether operative duration and procedure were correlation with the peak PCT level.