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Table 2 Perioperative Blood Loss, Fluid Infusion and Blood Transfusion

From: A retrospective cohort study on red blood cell morphology changes in pre-school age children under nitrous oxide anesthesia

  Air group N2O group P value
Intraoperative blood loss (mL) 200 [125–300] 200 [100–300] 0.722
Intraoperative fluid infusion (mL) 500 [400–800] 540 [400–750] 0.948
No red cell transfusion, N (%) 5 (7.7) 4 (5.6) 0.737
Intraoperative red cell transfusion
 N (%) 60 (92.3) 67 (94.4) 0.737
 Volume (mL) 325 [200–400] 270 [200–400] 0.780
Exclusively allogeneic transfusion
 N (%) 20 (30.8) 34 (47.9) 0.042
 Volume (mL) 200 [200–400] 200 [200–400] 0.761
Exclusively autologous transfusion
 N (%) 7 (10.8) 6 (8.5) 0.646
 Volume (mL) 130 [128–139] 123 [109–174] 0.445
Mixed transfusion
 N (%) 33 (50.8) 27 (38.0) 0.135
 Volume (mL) 349 [327–516] 350 [325–516] 0.761
Postoperative red cell transfusion
 N (%) 2 (3.1) 1 (1.4) 0.606
  1. Postoperative red cell transfusions were exclusively allogeneic. Data are presented as numbers (percentage), or median (25th–75th percentile). N2O nitrous oxide