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Table 3 Postoperative clinical data of infants with versus without acute kidney injury after undergoing cardiopulmonary bypass surgery a

From: Intraoperative renal near-infrared spectroscopy indicates developing acute kidney injury in infants undergoing cardiac surgery with cardiopulmonary bypass: a case–control study

  AKI No AKI P -value
Lactate 6 hr p.o. (μmol/L) 2.2 (0.9 to 17) 1.9 (0.9 to 7.4) 0.32
Lactate 12 hr p.o. (μmol/L) 3 (1.1 to 19) 2.4 (1 to 6) 0.08
Lactate 24 hr p.o. (μmol/L) 2.6 (1.4 to 16) 1.7 (0.9 to 6.5) 0.01
ScvO2 2 hr p.o. (%) 57 (35 to 88) 60 (34 to 87) 0.54
ScvO2 24 hr p.o. (%) 55 (40 to 88) 62 (44 to 89) 0.004
SaO2 2 hr p.o. (%) 87 (70 to 100) 92 (55 to 99) 0.39
SaO2 24 hr p.o. (%) 83 (69 to 100) 93 (63 to 100) 0.76
MAP <50 mmHg >2 hr within 24 hr p.o., n (%) 16 (59) 8 (25) 0.008
Norepinephrine ≤0.1 μg/kg/min, n (%) 15 (56) 11 (34) 0.03
Norepinephrine >0.1 μg/kg/min, n (%) 5 (19) 2 (6) 0.01
Urine output 24 hr p.o. (ml/kg) 4.9 (1.5 to 7.9) 4.6 (2.9 to 8.8) 0.37
Time on respirator (hr) 47 (2 to 624) 22 (2 to 270) 0.03
ICU stay (days) 12 (3 to 35) 10 (4 to 74) 0.06
Hospital stay (days) 28 (7 to 76) 25 (12 to 96) 0.13
RRT, n (%) 3 (11) 0 (0) 0.09
Deaths, n (%) 2 (7) 0 (0) 0.2
  1. aThe clinical data of the postoperative course are presented as median and range or individual values. AKI, Acute kidney injury; ICU, Intensive care unit; MAP, Mean arterial pressure; p.o., Postoperatively; RRT, Renal replacement therapy; SaO2, Arterial oxygen saturation; ScvO2, Systemic venous oxygen saturation.