Table 5.
Comparison of patients that received <1600 mL pre-CPB fluid to those that received 21600 mL.
| Variable | Received <1600 mL Mean (SD) (or Median and Interquartile Range) (n = 55) | Received ≥1600 mL Mean (SD) (or Median and Interquartile Range) (n = 35) |
t Test p Value |
Wilcoxon p Value |
χ2 p Value |
|---|---|---|---|---|---|
| Pre-CPB volume | |||||
| mL* | 1200 (1100, 1400) | 2000 (1800, 2400) | <.0001 | ||
| mL/kg* | 14.3 (11.5, 17.1) | 24.7 (19.9, 29.6) | <.0001 | ||
| Sex | .2483 | ||||
| Male | 38 (69%) | 20 (57%) | |||
| Female | 17 (31%) | 15 (43%) | |||
| Age (yr)* | 58 (52, 73) | 62 (54, 74) | .3536 | ||
| Weight (kg) | 88.6 (17.2) | 86.2 (13.9) | .4949 | ||
| BSA (m2) | 2.00 (0.21) | 1.97 (.20) | .4754 | ||
| CPB prime (mL)* | 1550 (1350, 1600) | 1400 (1350, 1550) | .1132 | ||
| Hematocrit (%) | |||||
| Baseline O* | 39.6 (36.6, 42.3) | 39.9 (34.5, 42) | .3349 | ||
| On CPB | 25.9 (3.4) | 22.8 (3.8) | <.0001 | ||
| Low CPB | 25.6 (3.3) | 22.4 (3.7) | <.0001 | ||
| ICU | 29.1 (4.0) | 30.2 (4.9) | .2529 | ||
| CPB Hct < 25% | .0008 | ||||
| Yes | 21 (38%) | 26 (74%) | |||
| No | 34 (62%) | 9 (26%) | |||
| PRBC transfusion | <.0001 | ||||
| Yes | 9 (16%) | 21 (60%) | |||
| No | 46 (84%) | 14 (40%) | |||
| Transfused units† | 1 (1, 2) | 2 (1, 2) | .1446 | ||
| Autotransfusion units* | 3 (3, 4) | 3 (3, 4) | .1384 |
*
Median (25th percentile, 75th percentile) are presented because of skewness of the data.
†
Only those who received units of blood included in comparison.