IL18 and acute kidney injury: Absolute urine IL-18 concentration 6 h after weaning from CPB did not differ significantly between the groups (p = 0.597), but in patients with AKI, there was a significant increase in urine IL-18 compared to the initial value (M = 122.02 (100–204.21)% vs. 89.8 (77.97–112.53)% in the control group, p = 0.002).