The diagnostic characteristics of the patients registered will be described according to categorical variables across a table of frequency. Continuous variables will be subjected to summary statistics such as average, standard deviation, median, minimum and maximum. The differences between the groups will be subjected to verification of the significance through non-parametric (Chi Square and Fisher Exact Test for the non-continuous variables and the Mann-Whitney or the Kruskall-Wallis for associations between the continuous variables. The incidence of cardiovascular or respiratory complications, nausea and/or vomiting, shivering, neurological complications and delirium will be tabulated through table of frequency.