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Table 2 Perioperative fluid administration in the study groups

From: Relationship between a perioperative intravenous fluid administration strategy and acute kidney injury following off-pump coronary artery bypass surgery: an observational study

Variable Control group RPF group P value
Number of patients 554 229  
Intraoperative data
 Crystalloid (L) 1.6 [1.2–2.0] 2.2 [1.8–2.8] <0.001
 Crystalloid per weight (ml/kg) 24.2 [18.4–31.5] 34.3 [25.3–44.5] <0.001
 Colloid (L) 1.2 [1.0–1.5] 1.0 [0.6–1.0] <0.001
 Colloid per weight (ml/kg) 18.5 [14.8–22.4] 14.4 [10.1–17.4] <0.001
 Colloid-to-crystalloid volume ratio 0.8 [0.6–1.0] 0.4 [0.3–0.6] <0.001
 Cell salvage blood (ml) 237.4 ± 328.0 138.7 ± 208.1 <0.001
Data in intensive care unit
 Colloid (L) 1.0 [0.5–1.5] 0 [0–0.2] <0.001
 Colloid per weight (ml/kg) 16.1 [8.5–24.8] 0 [0–3.1] <0.001
 Cumulative colloid (L)a 2.3 [1.8–2.8] 1.0 [0.8–1.5] <0.001
 Cumulative colloid per weight (ml/kg)a 35.0 [27.1–44.7] 16.0 [11.0–20.1] <0.001
 Packed red blood cell (unit)a 2.8 ± 2.6 2.1 ± 1.9 <0.001
 Use of fresh frozen plasmaa 265 (47.8) 77 (33.6) <0.001
 Use of platelet concentratea 181 (32.7) 34 (14.8) <0.001
 Use of cryoprecipitatea 31 (5.6) 6 (2.6) 0.110
 Weight gain (%) 1.9 ± 2.2 2.6 ± 2.1 <0.001
  1. RPF renal protective fluid management
  2. Data are expressed as number of patients (%), mean ± standard deviation, or median [interquartile range]
  3. aUsed during surgery and within 48 h postoperatively