IL6 and immune system disorder: In addition, maintenance of near normal immune function following use of propofol anesthesia has been shown,[44–46] while an increase in interleukin-6, as well as other immune dysfunctions may occur after use of inhaled general anesthetics.[46–48] Propofol has anti-inflammatory properties[49] and surgical site infections were reported to be suppressed with use of propofol as compared to sevoflurane.[50] Thus, such effects on immune function may have influenced the present results.