Extracellular Volume Calculator

Calculate Extracellular Volume (ECV)



Formula

The formula to calculate the Extracellular Volume (ECV) is:

\[ ECV = TBW - ICV \]

Where:

Example

Let's say the total body water (\( TBW \)) is 42 liters and the intracellular volume (\( ICV \)) is 28 liters. Using the formula:

\[ ECV = TBW - ICV = 42 - 28 = 14 \text{ liters} \]

So, the Extracellular Volume (\( ECV \)) is 14 liters.

What is Extracellular Volume?

Extracellular volume (ECV) refers to the volume of fluid outside the cells in the body. This fluid includes interstitial fluid, plasma, and transcellular fluid. The extracellular volume is crucial for maintaining the balance of electrolytes and other substances between the cells and their environment. It plays a vital role in various physiological processes, including nutrient transport, waste removal, and maintaining blood pressure. Understanding the extracellular volume is essential in medical fields such as nephrology and cardiology, where fluid balance is critical for patient care.

Extended information about "Extracellular-Volume-Calculator"

Extracellular Volume Calculator MRI

Definition: This calculator estimates the extracellular volume (ECV) fraction using MRI data.

Formula: \( \text{ECV} = \frac{1 - \text{Hematocrit}}{\text{Post-Contrast T1} - \text{Pre-Contrast T1}} \)

Example: \( \text{ECV} = \frac{1 - 0.45}{500 - 1000} \)

Unit Cell Volume Calculator

Definition: This calculator determines the volume of a unit cell in crystallography.

Formula: \( V = a \times b \times c \times \sqrt{1 - \cos^2 \alpha - \cos^2 \beta - \cos^2 \gamma + 2 \cos \alpha \cos \beta \cos \gamma} \)

Example: \( V = 5 \times 5 \times 5 \times \sqrt{1 - \cos^2 90^\circ - \cos^2 90^\circ - \cos^2 90^\circ + 2 \cos 90^\circ \cos 90^\circ \cos 90^\circ} \)

Tumor Volume Calculation Formula

Definition: This formula calculates the volume of a tumor based on its dimensions.

Formula: \( V = \frac{\pi}{6} \times L \times W \times H \)

Example: \( V = \frac{\pi}{6} \times 4 \times 3 \times 2 \)