To calculate plasma volume, you can use the following formula based on total blood volume (TBV) and hematocrit (Hct):
TPV = TBV * (1 - Hct)
Where:
- TPV is the Total Plasma Volume
- TBV is the Total Blood Volume
- Hct is the Hematocrit, which represents the percentage of blood volume composed of red blood cells.
This formula leverages the relationship between total blood volume, the proportion of red blood cells (hematocrit), and the remaining portion that constitutes plasma.