1. What is Normal Bladder Scan Volume?

Definition: This calculator estimates bladder volume from ultrasound measurements using 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 formula:

Where:

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

Explanation: The formula approximates the bladder as an ellipsoid, providing a volume estimate from three orthogonal measurements.

3. Importance of Bladder Volume Measurement

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

4. Using the Calculator

Tips: Enter the maximum length, width, and height measurements from the bladder scan in centimeters. All values must be > 0.

5. Frequently Asked Questions (FAQ)

Q1: How accurate is this estimation?
A: The ellipsoid formula typically estimates within 10-15% of actual bladder volume when measurements are taken correctly.

Q2: What's a normal bladder volume range?
A: Normal capacity is typically 300-500 cm³ in adults, but varies with age, gender, and individual factors.

Q3: When would this calculation be used?
A: For post-void residual measurements, pre-catheterization assessment, or monitoring bladder function.

Q4: How do I convert cm³ to ml?
A: They are equivalent (1 cm³ = 1 ml) for clinical purposes.

Q5: What if the bladder isn't perfectly ellipsoid?
A: The formula still provides a useful estimate, though some scanners use more complex algorithms for irregular shapes.