Final answer:
To estimate the Plasma Volume of a patient with a Total Blood Volume of 6 L and a Hematocrit of 40%, we use the formula Plasma Volume = TBV × (Percentage of plasma). With a 40% hematocrit, 60% of blood is plasma, leading to a Plasma Volume of 6 L × 0.60, which equals 3.6 liters.
Step-by-step explanation:
To calculate the approximate Plasma Volume of a patient with a Total Blood Volume (TBV) of 6 liters and a Hematocrit of 40%, we first need to determine the percentage of the blood that is plasma. The hematocrit value represents the percentage of blood volume occupied by red blood cells, so if the hematocrit is 40%, it means that 60% of the blood is plasma because blood is composed of red blood cells and plasma.
Once we know the percentage of blood that is plasma, we can find the plasma volume by multiplying the TBV by the percentage of plasma:
- Plasma Volume = TBV × (Percentage of plasma)
- Plasma Volume = 6 L × 60%
- Plasma Volume = 6 L × 0.60
- Plasma Volume = 3.6 L
Therefore, the patient’s approximate Plasma Volume is 3.6 liters.