Normal Bladder Size CT

Bladder Volume Formula:

\[ V = \frac{\pi}{6} \times L \times W \times H \]

Bladder Volume (cm³):

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1. What is Normal Bladder Size CT?

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

Purpose: It helps medical professionals assess bladder size and volume from CT scan measurements.

2. How Does the Calculator Work?

The calculator uses the formula:

\[ V = \frac{\pi}{6} \times L \times W \times H \]

Where:

\( V \) — Volume of bladder (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 normal bladder.

3. Importance of Bladder Volume Calculation

Details: Accurate bladder volume assessment helps diagnose conditions like urinary retention, overactive bladder, and monitor post-void residuals.

4. Using the Calculator

Tips: Enter the maximum dimensions (length, width, height) measured from CT images in centimeters. All values must be > 0.

5. Frequently Asked Questions (FAQ)

Q1: What is a normal bladder volume range?
A: Normal bladder capacity is typically 300-500 mL (300-500 cm³) in adults.

Q2: How accurate is this estimation method?
A: The ellipsoid formula provides a good approximation, typically within 10-15% of actual volume.

Q3: When would this calculation be used?
A: Commonly used in urology, radiology, and emergency medicine to assess bladder volume non-invasively.

Q4: How do I measure the dimensions on CT?
A: Measure the longest axis in each dimension (length, width, height) on axial, sagittal, and coronal views.

Q5: Does this work for irregularly shaped bladders?
A: The formula is less accurate for significantly irregular bladders; alternative methods may be needed.