1. What is Bladder Volume Calculation?

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

Purpose: It helps medical professionals assess bladder capacity and volume for diagnostic and treatment purposes.

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 calculates the volume of an ellipsoid shape, which approximates the bladder's form when moderately filled.

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

5. Frequently Asked Questions (FAQ)

Q1: How accurate is this calculation?
A: The ellipsoid formula provides a good estimate (within 10-15% of actual volume) for moderately filled bladders.

Q2: What imaging modality is best for measurements?
A: Ultrasound is most commonly used for bladder volume measurements.

Q3: When would this calculation be less accurate?
A: For very full or irregularly shaped bladders, the formula may underestimate true volume.

Q4: How do I convert cm³ to ml?
A: 1 cm³ equals 1 ml, so no conversion is needed.

Q5: What's a normal bladder volume range?
A: Typically 300-500 ml for adults, but varies with age, gender, and individual factors.