Table V.
Decisional criteria for transfusion in acute anaemia (GoR: grade of recommendation)
| Class of haemorrhage | Percentage reduction in blood volume | mL * | Indication for the transfusion of RCCs | GoR |
|---|---|---|---|---|
| Class I | < 15 % | < 750 | Not necessary, unless pre-existing anaemia | 2C+ |
| Class II | 15–30 % | 750–1,500 | Not necessary, unless pre-existing anaemia and/or cardiopulmonary disease | 2C+ |
| Class III | 30–40 % | 1,500–2,000 | Probably necessary | 2C+ |
| Class IV | > 40 % | > 2,000 | Necessary | 2C+ |
*
In an adult weighing 70 kg with a circulatory volume of 5,000 mL.