1. What is Bladder Volume Calculation Ultrasound?

Definition: This calculator estimates bladder volume using ultrasound measurements based on the ellipsoid formula.

Purpose: It helps medical professionals assess bladder volume non-invasively for urological evaluations.

2. How Does the Calculator Work?

The calculator uses the ellipsoid formula:

Where:

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

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

3. Importance of Bladder Volume Measurement

Details: Accurate bladder volume assessment helps diagnose urinary retention, monitor post-void residuals, and evaluate bladder function.

4. Using the Calculator

Tips: Enter the three orthogonal measurements (length, width, height) in centimeters obtained from ultrasound imaging. All values must be > 0.

5. Frequently Asked Questions (FAQ)

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

Q2: What's the normal bladder volume range?
A: Typically 300-500 cm³ when full, but varies by age, gender, and individual factors.

Q3: When would this calculation be used?
A: For assessing post-void residuals, evaluating urinary retention, or monitoring bladder capacity.

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

Q5: What if my ultrasound machine calculates volume automatically?
A: This tool provides a manual calculation method when automated features aren't available or for verification.