1. What is a Bladder Volume Calculator POCUS?

Definition: This calculator estimates bladder volume using point-of-care ultrasound measurements of length, width, and height.

Purpose: It helps medical professionals assess bladder volume non-invasively for diagnostic and monitoring purposes.

2. How Does the Calculator Work?

The calculator uses the ellipsoid formula:

Where:

• \( V \) — Volume of bladder (cm³)
• \( L \) — Length (cm)
• \( W \) — Width (cm)
• \( H \) — Height (cm)

Explanation: The formula approximates the bladder as an ellipsoid shape, which is the standard method for ultrasound bladder volume estimation.

3. Importance of Bladder Volume Measurement

Details: Accurate bladder volume assessment is crucial for diagnosing urinary retention, monitoring post-void residuals, and evaluating bladder function.

4. Using the Calculator

Tips: Enter the maximum dimensions obtained from transverse and longitudinal ultrasound views. All values must be > 0.

5. Frequently Asked Questions (FAQ)

Q1: How accurate is this method?
A: The ellipsoid formula has about 90% accuracy compared to catheterized volumes in most clinical situations.

Q2: What's a normal bladder volume?
A: Normal capacity is typically 400-600 cm³ in adults, but varies with age, gender, and individual factors.

Q3: When is this measurement particularly useful?
A: For assessing urinary retention, post-void residuals, pre- and post-catheterization, and bladder training programs.

Q4: How do I convert cm³ to ml?
A: They are equivalent (1 cm³ = 1 ml) for clinical purposes.

Q5: What if the bladder isn't perfectly ellipsoid?
A: The formula still provides a good estimate, but for irregular shapes, consider multiple measurements or alternative methods.