At what specific temperature is donor blood preserved______________?
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Answer: B. 4°C
Explanation
Blood banks maintain donated whole blood at a strict refrigeration temperature of four degrees Celsius. This controlled cold environment slows cellular metabolism and preserves red blood cell viability during storage. Standard transfusion medicine guidelines specify four degrees Celsius as the optimal donor blood preservation temperature. Donated blood products require specialized storage conditions to prevent bacterial proliferation and cellular degradation. Refrigeration reduces erythrocyte metabolic consumption of glucose and minimizes hemolysis during storage periods. Additive solutions are often mixed with stored blood to extend shelf life and maintain biochemical integrity.
Proper blood banking protocols ensure safe transfusion therapy for trauma patients and surgical interventions. Strict temperature monitoring prevents the administration of spoiled or contaminated blood products to recipients. Maintaining cold chain integrity is vital throughout the collection, storage, and transport of blood components. Freezing temperatures below zero cause extensive red blood cell hemolysis and render whole blood unsafe. Higher temperatures near six or eight degrees Celsius promote bacterial growth and accelerate cellular spoilage. Room temperature storage leads to rapid degradation of labile clotting factors and promotes bacterial contamination.
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