Reassess your patient
For blood transfusions in the stable, non bleeding, normovolaemic patient, e.g. post-operative patient.
One unit of red cells (or 4-5 mL/kg) will typically increase an adult's haemoglobin by 10g/L. Patients who are smaller (<60kg) may show a larger increase in haemoglobin.
Decisions about whether to transfuse further units and how many must be based on all of the following information:
All this information must be assessed before commencing the next unit.
These principles also apply to plasma and platelets.