Certified Tissue Bank Specialist 2026 Complete Practice Test

The correct answer is packed red blood cells. In the context of plasma dilution calculations, it is important to consider the timing and nature of blood products received prior to death. Packed red blood cells can significantly influence the volume and concentration of plasma components due to their high hematocrit levels.

If packed red blood cells were administered, they would factor into the dilution of plasma because they increase the proportion of red blood cells within the overall blood volume, thereby affecting the ratios of various proteins and substances present in the plasma. This has implications for tissue viability and assessment in a tissue bank setting, especially given the 36-hour timeframe in which the body processes different fluids can affect lab results and tissue suitability.

In contrast, normal saline, dextrose in water, and lactated ringers do not have the same impact on plasma dilution calculations as they are primarily isotonic fluids used for hydration or electrolyte balance. They do not contribute to the red cell mass or concentrated plasma components to the same degree that packed red blood cells do, making their inclusion less critical for this specific calculation.