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Table 1 Coronary Peri-Operative Transfusion Trigger Score (cPOTTS)

From: Evaluation of a novel Cardiac Peri-Operative Transfusion Trigger Scoring system in patients with coronary artery disease

Score Epinephrine (μg kg−1 min−1)a FiO2 (%)b ScvO2c Angina pectoris
0 0 ≤ 35% > 75% No
+ 1 0–0.05 36–50% 70–75% Occurs during exercise or manual labor or excitement
+ 2 ≥ 0.06 ≥ 51% < 70% Occurs during daily activity or quietly rest
  1. During the operation, if ST segment was down ≥ 0.1 mV and or arrhythmia occurred, it was scored at 2 points. The total scores of four above items + 7 were the total score of cPOTTS. The top score was 10 points, and atotal score ≥ 10 was still scored as 10 points
  2. aThe amount of epinephrine needed to maintain normal blood pressure
  3. bRequirement of inspiration O2 to sustain 95% SpO2 (peripheral capillary oxygen saturation)
  4. cCentral venous oxygen saturation