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| Intraoperative factors | 0 points | 1 point | 2 points | 3 points | 4 points |
|---|---|---|---|---|---|
| EBL (mL) | >450 | 301–450 | 191–300 | ≤190 | |
| Lowest MAP (mmHg) | <40 | 40–54 | 55–69 | ≥70 | |
| Lowest HR (beats/minute) | >85 | 76–85 | 66–75 | 56-65 | ≤55 |
EBL, estimated blood loss; MAP, mean arterial pressure; HR, heart rate.
