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Table 6 Simplified E-CABG perioperative bleeding classification [20]

From: European registry of type A aortic dissection (ERTAAD) - rationale, design and definition criteria

Grades Intervention for treatment of bleeding
0 No RBC transfusion or transfusion of 1 unit of RBCs
1 Transfusion of 2–4 units of RBCs
2 Transfusion of 5–10 units of RBCs
and/or
reoperation for intrathoracic bleeding
3 Transfusion of > 10 units of RBCs
  1. RBC red blood cell