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Table 2 Intraoperative variables by acute kidney injury status

From: Mild increases in plasma creatinine after intermediate to high-risk abdominal surgery are associated with long-term renal injury

Variables No AKI (N = 706) AKI stage 1 (N = 81) AKI stage 2–3 (N = 28) P-value
Anaesthesia duration (min) 346 [260–446] 421 [339–502] 451 [354–576] < 0.001
Surgery duration (min) 262 [184–352] 337 [263–397] 366 [282–445] < 0.001
Total crystalloid (ml) 2000 [1300–3000] 3000 [2000–4000] 4000 [2000–5900] < 0.001
Total colloid £ (ml) 500 [500–1000] 1000 [500–1500] 1000 [500–2000] 0.008
Total blood product (ml) 500 [300–800] 550 [396–1700] 525 [270–1900] 0.2
Total IN (ml) 2500 [1800–3500] 3500 [2500–5400] 4500 [2300–7300] < 0.001
Estimated blood loss (ml) 500 [200–1000] 700 [300–1700] 1000 [500–1600] < 0.001
Diuresis (ml) 300 [150–500] 300 [200–500] 300 [200–500] 0.9
Gastric suction (ml) 100 [50–100] 50 [50–100] 50 [50–160] 0.7
TOTAL OUT (ml) 900 [500–1600] 1100 [700–2100] 1400 [900–2200] 0.002
Net fluid balance (ml) 1500 [800–2300] 2300 [1400–3300] 3100 [1100–5200] < 0.001
Use of vasopressors, $ N (%) 554 (78%) 67 (83%) 23 (82%) 0.6
  1. Values are presented as medians [interquartiles ranges] or numbers (percentages %)
  2. $: use of any vasopressor (ephedrine, phenylephrine, noradrenaline)
  3. £ total colloid included 3% gelatin and 6% tetrastarch