Systemic Inflammatory Reponse Syndrome (SIRS): is a global inflammatory response for many different agents characterized by the presence of at least 2 of the following criteria: - Body temperature> 380C or <360C; - Heart rate> 90 times / minute; - Breathing frequency> 20 times / minute or PaCO2 <32 mmHg; - The number of peripheral blood leukocytes> 12G / L or <4G / L or leukocytes accounts for> 10%.