1. What is Bladder Volume Ultrasound Calculation?

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 most common method for ultrasound volume estimation.

3. Importance of Bladder Volume Measurement

Details: Accurate bladder volume assessment is crucial for diagnosing urinary retention, planning catheterization, and evaluating bladder function.

4. Using the Calculator

Tips: Enter all three dimensions (length, width, height) in centimeters as measured by ultrasound. All values must be > 0.

5. Frequently Asked Questions (FAQ)

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

Q2: What's a normal bladder volume?
A: Average capacity is 400-600 cm³, but varies by age, gender, and individual factors.

Q3: When would this calculation be used?
A: For pre- and post-void residual measurements, assessing urinary retention, or monitoring bladder function.

Q4: Are there alternative formulas?
A: Yes, some use width×height×length×0.52 (same as π/6) or other coefficients for specific populations.

Q5: How do I convert cm³ to ml?
A: They are equivalent (1 cm³ = 1 ml) for clinical purposes.