More or less? The Goldilocks Principle as it applies to red cell transfusions

The quest for the optimal haemoglobin threshold (previously referred to as 'trigger') for red blood cell transfusion seems a never-ending journey. As if we are chasing a mirage, the closer we seem to think we get to the 'just right' haemoglobin level, the further it seems to move away. Applying the 'Goldilocks Principle' to transfusion of red cells, regardless of the population queried, appears to yield results that satisfy some investigators but leave many practitioners still wondering what is best for the patient.

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