1. What is the Paediatric Bladder Volume Calculation?

The paediatric bladder volume formula estimates bladder capacity in children based on age. It's commonly used for urodynamic studies and bladder function tests in paediatric patients.

2. How Does the Calculator Work?

The calculator uses the paediatric bladder volume formula:

Where:

• \( Age \) — Child's age in years (0-18 years)
• 30 — Multiplication factor (mL per year of adjusted age)

Explanation: The formula accounts for the natural increase in bladder capacity as children grow older.

3. Importance of Bladder Volume Estimation

Details: Accurate bladder volume estimation helps in diagnosing urinary disorders, planning catheterization procedures, and assessing bladder function in children.

4. Using the Calculator

Tips: Enter the child's age in years (must be between 0-18 years). The calculator will estimate the expected bladder volume in milliliters (mL).

5. Frequently Asked Questions (FAQ)

Q1: Why is age + 2 used in the formula?
A: The "+2" accounts for baseline bladder capacity in newborns and provides better correlation with actual measurements across all paediatric ages.

Q2: What are normal bladder volumes for children?
A: Normal bladder capacity increases with age. As a rough guide: (Age + 2) × 30 mL provides the expected volume.

Q3: When is this calculation most useful?
A: Particularly valuable for urodynamic studies, evaluating urinary retention, and determining appropriate catheter sizes.

Q4: Are there limitations to this formula?
A: Less accurate in children with neurogenic bladders, anatomical abnormalities, or those who have undergone bladder surgery.

Q5: How does this compare to adult bladder volumes?
A: Adult bladder capacity is typically 400-600 mL, while children's capacity increases progressively with age.