Table 3 Summary of all definitions for massive transfusion used in randomised controlled trials to date
From: Definitions of massive transfusion in adults with critical bleeding: a systematic review
| Â | MT definition | Total number of RCTs using the definition |
|---|---|---|
1 |  ≥ 10 U RBC/24 h | 9 |
2 |  > 5 U blood | 4 |
3 |  > 10 U RBC | 3 |
4 |  ≥ 4 U RBC/6 h | 2 |
5 |  ≥ 3 U RBC/1 h or ≥ 10 U RBC/24 h | 2 |
6 |  > 20 U RBC | 1 |
7 |  > 6 U/24 h | 1 |
8 |  > 20 U blood | 1 |
9 |  ≥ 5 U RBC | 1 |
10 |  ≥ 12 U blood/12 h | 1 |
11 |  > 3 U RBC | 1 |
12 |  > 4 U RBC | 1 |
13 |  > 10 U RBC/6 h | 1 |
14 |  > 5 U RBC/24 h | 1 |
15 |  ≥ 10 U RBC | 1 |
| Â | Total | 30 |