1. What is Pediatric Bladder Volume Calculation?

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

Purpose: It helps healthcare professionals assess bladder capacity and monitor urinary function in children.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( V \) — Bladder volume (cm³)
• \( L \) — Maximum length (cm)
• \( W \) — Maximum width (cm)
• \( H \) — Maximum height (cm)

Explanation: The formula calculates the volume of an ellipsoid, which approximates the shape of a filled bladder.

3. Importance of Bladder Volume Measurement

Details: Accurate bladder volume assessment is crucial for diagnosing urinary retention, monitoring bladder function, and evaluating treatment effectiveness.

4. Using the Calculator

Tips: Enter the maximum length, width, and height measurements obtained from ultrasound in centimeters. 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 regularly shaped bladders.

Q2: What's the normal bladder capacity for children?
A: Expected bladder capacity in ounces ≈ (Age in years + 2). For cm³, multiply by 30 (approx).

Q3: When would this calculation be inaccurate?
A: With irregularly shaped bladders, significant trabeculation, or when the bladder isn't adequately filled.

Q4: How should measurements be taken?
A: Measurements should be taken in three orthogonal planes at maximum bladder distension.

Q5: Can this be used for adults?
A: Yes, the same formula applies to adults, though pediatric applications are more common.