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Table 8 Hematocrit values and fluid balance by patient group.

From: Intra-operative intravenous fluid restriction reduces perioperative red blood cell transfusion in elective cardiac surgery, especially in transfusion-prone patients: a prospective, randomized controlled trial

HEMATOCRIT VALUES Group A Group B
1. Preoperative 40.21 ± 4.42 40.57 ± 3.87
2. After arterial line placement 39.59 ± 4.72 39.04 ± 4.41
3. After anesthesia induction 37.81 ± 4.69 36.44 ± 4.03#
4. After first cardioplegia 21.26 ± 3.49 19.96 ± 3.56#
5. End of CPB 24.53 ± 3.06 24.10 ± 2.30
6. End of operation 27.23 ± 3.20 26.46 ± 2.29
7. 6 hours in the ICU 28.98 ± 3.37 28.34 ± 2.49
8. 12 hours in the ICU 30.30 ± 2.79 30.67 ± 2.60
9. Day of discharge 32.74 ± 2.22 33.13 ± 2.09
FLUID BALANCE   
IV fluids (ml) to initiation of CPB 328 ± 157 642 ± 222
urine (ml) to initiation of CPB 141 ± 106 169 ± 111
fluid balance after 1st cardioplegia 2058 ± 236 2323 ± 365
urine (ml) during CPB 822 ± 483 838 ± 378
total urine production (ml) 1455 ± 532 1538 ± 546
use of filter, n (%) 11 (11.0%) 20 (21.7%)##
Overall fluid balance 390 ± 432 667 ± 553
Calculated erythrocyte volume loss 758 ± 299 903 ± 303##
  1. # p < 0.05
  2. ## p < 0.005
  3. p < 0.001
  4. p < 0.0001