Blood products. Main principles of transfusion

1. Big picture

Transfusion is component therapy, not “giving blood because the number is low.” The key clinical question is:

What is missing: oxygen-carrying capacity, platelets, coagulation factors, or fibrinogen?

Blood transfusion is essentially a tissue transplantation with possible serious complications, so every unit must have a clear indication, compatibility check, monitoring, and reassessment. The question file emphasizes that there is no universal hemoglobin trigger for all patients; transfusion decisions depend on oxygen demand, cardiac output, oxygen saturation, comorbidities, and clinical context. It also states that transfusion is seldom indicated above Hb 10