1. What is Bladder Scan Volume?

The bladder scan volume is an estimation of urine volume in the bladder calculated from ultrasound measurements. It helps assess urinary retention and guide catheterization decisions.

2. How Does the Calculator Work?

The calculator uses the bladder volume formula:

Where:

• \( Length \) — Maximum bladder length in cm
• \( Width \) — Maximum bladder width in cm
• \( Height \) — Maximum bladder height in cm
• \( 0.52 \) — Shape factor for bladder volume estimation

Explanation: The formula approximates bladder volume by treating it as an ellipsoid shape and applying a correction factor.

3. Importance of Bladder Volume Measurement

Details: Accurate bladder volume measurement helps diagnose urinary retention, guide catheterization decisions, and monitor post-void residual volumes.

4. Using the Calculator

Tips: Enter all three dimensions (length, width, height) in centimeters as measured by ultrasound. All values must be positive numbers.

5. Frequently Asked Questions (FAQ)

Q1: How accurate is this calculation?
A: The formula provides a good estimate but may vary ±15% from actual volume. Accuracy depends on proper ultrasound measurement technique.

Q2: What is a normal bladder volume?
A: Normal bladder capacity is typically 300-400 mL in adults. Volumes >500 mL may indicate urinary retention.

Q3: When should bladder scanning be performed?
A: Common indications include assessment of urinary retention, post-void residuals, and monitoring bladder volume in catheterized patients.

Q4: Are there limitations to this calculation?
A: Accuracy decreases with irregular bladder shapes or when one dimension cannot be properly measured. Clinical correlation is always needed.

Q5: How does this compare to catheterized volumes?
A: Bladder scan estimates typically correlate well with catheterized volumes but may slightly underestimate in some cases.