Table 2.
Parameters | 0 Points* | 1 Point | 2 Points | 3 Points | 4 Points |
---|---|---|---|---|---|
Estimated blood loss (mL) | >1000 | 601–1000 | 101–600 | ≤100 | – |
Lowest mean arterial pressure (mmHg) | <40 | 40–54 | 55–69 | ≥70 | – |
Lowest heart rate (beats/min) | >85 | 76–85 | 66–75 | 56–65 | ≤55 |
Occurrence of pathological bradyarrhythmia (including sinus arrest, atrioventricular block of dissociation, junctional or ventricular escape rhythms) and asystole also receives 0 points for lowest heart rate.
Reprinted from Gawande et al.12, ©2007, with permission from the American College of Surgeons.