TABLE 2.
Calculation of HBL and mHBL according to Gross formula and modified formula in different age groups and genders
| Indexes | PBV, mL | Intraoperative blood loss, mL | TBL, mL | Drainage, mL | DBL, mL | HBL, mL | HBL/TBL, % | mHBL, mL | mHBL/TBL, % | |
|---|---|---|---|---|---|---|---|---|---|---|
| Gender | Male (9 cases) | 4749.0 ± 521.6 | 567.1 ± 360.6 | 943.1 ± 322.3 | 411.1 ± 294.2 | 219.9 ± 135.2 | 342.3 ± 310.6 | 31.2 ± 27.8 | 572.6 ± 255.8 | 59.9 ± 15.1 |
| Female (52 cases) | 3728.0 ± 381.8 | 435.3 ± 391.1 | 948.3 ± 337.2 | 511.9 ± 270.3 | 313.5 ± 182.1 | 431.1 ± 278.6 | 43.3 ± 22.4 | 630.2 ± 216.5 | 68.5 ± 16.0 | |
| P | <0.001 | 0.350 | 0.968 | 0.312 | 0.170 | 0.422 | 0.178 | 0.498 | 0.158 | |
| Age | ≤60 y (17 cases) | 4122.6 ± 553.5 | 498.9 ± 312.5 | 815.2 ± 395.0 | 481.2 ± 301.1 | 285.6 ± 210.2 | 287.9 ± 240.0 | 32.4 ± 20.1 | 511.9 ± 224.6 | 65.8 ± 18.5 |
| ˃60 y (44 cases) | 3784.4 ± 512.7 | 43.1 ± 413.8 | 993.7 ± 299.3 | 503.2 ± 265.9 | 305.8 ± 168.3 | 464.5 ± 291.8 | 44.8 ± 23.7 | 660.7 ± 208.5 | 67.9 ± 15.3 | |
| P | 0.028 | 0.577 | 0.073 | 0.781 | 0.708 | 0.040 | 0.075 | 0.023 | 0.666 |
DBL, drainage blood loss; HBL, hidden blood loss; mHBL, modified hidden blood loss; PBV, patient blood volume; TBL, total blood loss.