LCN2 and acute kidney injury: However, serum NGAL concentration, 24 h after birth, with a value >140.7 ng/mL allows to diagnose AKI in asphyxiated patients with 88.9 % sensitivity (95 % CI 75–95 %) and 95.0 % specificity (95 % CI 76–99 %)—Fig. 2.