1. What is a Urinary Bladder Volume Calculator?

Definition: This calculator estimates the volume of the urinary bladder using ellipsoid formula based on length, width, and height measurements.

Purpose: It helps medical professionals assess bladder capacity and diagnose conditions like urinary retention or overactive bladder.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

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

Explanation: The bladder is modeled as an ellipsoid, and the formula calculates its volume based on three orthogonal measurements.

3. Importance of Bladder Volume Calculation

Details: Accurate volume estimation helps in diagnosing urinary disorders, planning catheterization, and assessing post-void residual urine.

4. Using the Calculator

Tips: Enter the length, width, and height measurements 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 normally shaped bladders.

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

Q3: When would this calculation be inaccurate?
A: For irregularly shaped bladders (e.g., with diverticula or tumors) or when measurements aren't orthogonal.

Q4: Can I use this for pediatric patients?
A: Yes, but normal volumes are much smaller in children (approximately 30 mL at birth, increasing with age).

Q5: How do I convert cm³ to mL?
A: They are equivalent (1 cm³ = 1 mL), so no conversion needed.