Dear editor-in-Chief: Problems of surgical care have become a main cause of mortality and morbidity throughout the world. In 2004, the total amount of important surgery was an estimated almost one operation annually for every 25 human beings alive (1, 2). This is a large number with significant results for public health (2). Even though noticeable improvements in surgical safety knowledge, at least half of the events happen during surgical care (3, 4).