Results: Of the 213 postoperative patients studied, 114 53.6% were women and 99 46.4% were men, with a mean age of 47.1 ± 20.0 years.
Correo electrónico: machado@utp.edu.co J.E. Machado-Alba © 2012 Sociedad Colombiana de Anestesiología y Reanimación.