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Plasma Volume Calculator

Formula

The formula to calculate the Plasma Volume is:

$\text{PV} = \frac{\text{Hct} \cdot \text{TBV}}{1 - \text{Hct}}$

Where:

$\text{PV}$ is the Plasma Volume (mL)
$\text{Hct}$ is the Hematocrit Level
$\text{TBV}$ is the Total Blood Volume (mL)

What is Plasma Volume?

Plasma volume refers to the amount of plasma, the liquid component of blood, circulating in the body. Plasma makes up about 55% of total blood volume and is composed primarily of water, but also contains proteins, glucose, clotting factors, electrolytes, hormones, carbon dioxide, and oxygen. It plays a crucial role in maintaining blood pressure and regulating body temperature.

Example Calculation

Let's assume the following values:

Hematocrit Level (Hct) = 0.45
Total Blood Volume (TBV) = 5000 mL

Using the formula:

$\text{PV} = \frac{0.45 \cdot 5000}{1 - 0.45} \approx 4090.91 \, \text{mL}$

The Plasma Volume (PV) is approximately 4090.91 mL.