Surgical Apgar Score (SAS) for Postoperative RiskLoading...Estimated blood loss> 10000601-1000+1101-600+2≤ 100+3Lowest MAP< 40040-54+155-69+2≥ 70+3Lowest HR> 850Pathologic bradyarrhythmia or asystole076-85+166-75+256-65+3≤ 55+4