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Table 3 Hematocrit values, intravenous fluids and fluid balance by group

From: Monitoring of brain oxygen saturation (INVOS) in a protocol to direct blood transfusions during cardiac surgery: a prospective randomized clinical trial

Hematocrit values (%) Group A Group B P
  (INVOS, n = 75) (Control, n = 75)  
Preoperative 39.54 ± 3.90 40.38 ± 4.53 0.246
After arterial line placement 38.45 ± 4.32 38.68 ± 4.40 0.765
After anesthesia induction 38.19 ± 4.61 37.84 ± 4.53 0.655
After first cardioplegia 20.20 ± 3.60 20.16 ± 3.83 0.947
End of CPB 23.07 ± 3.45 23.26 ± 3.03 0.721
End of operation 27.55 ± 4.18 27.50 ± 4.15 0.943
6 hours in the ICU 28.15 ± 3.38 28.79 ± 3.32 0.263
12 hours in the ICU 28.61 ± 3.77 29.29 ± 3.58 0.254
Day of discharge 30.67 ± 3.07 31.28 ± 2.58 0.193
Fluid balance (ml)    
IV fluids to initiation of CPB 368.5 ± 177.0 416.4 ± 184.6 0.101
Urine to initiation of CPB 110.8 ± 95.9 135.7 ± 127.6 0.164
Fluid balance    
After 1st cardioplegia 2240.2 ± 238.8 2326.0 ± 306.4 0.055
Urine output during CPB 666.2 ± 594.0 694.0 ± 423.0 0.743
Total urine output 1326.2 ± 842.2 1419.3 ± 690.7 0.452
Use of filter, n (%) 8 (10.6%) 9 (12.0%) 0.796
Overall fluid balance 685.4 ± 784.1 809.9 ± 651.1 0.290