1. What is Testicular Volume Calculation?

Definition: This calculator estimates normal testicular volume using the ellipsoid formula based on length, width, and height measurements.

Purpose: It helps radiologists and urologists assess testicular size, which is important for evaluating puberty, fertility, and various medical conditions.

2. How Does the Calculator Work?

The calculator uses the ellipsoid formula:

Where:

• \( V \) — Volume (cm³)
• \( L \) — Length (cm)
• \( W \) — Width (cm)
• \( H \) — Height (cm)

Explanation: The formula approximates the testis as an ellipsoid, providing a close estimate of actual volume from ultrasound or physical measurements.

3. Importance of Testicular Volume

Details: Normal adult testicular volume ranges from 10-20 cm³. Volume assessment helps diagnose conditions like varicocele, orchitis, hypogonadism, and testicular atrophy.

4. Using the Calculator

Tips: Enter measurements in centimeters from ultrasound or physical exam. All values must be > 0. Typical adult values: L=4-5cm, W=2-3cm, H=2-3cm.

5. Frequently Asked Questions (FAQ)

Q1: Why use the ellipsoid formula?
A: It provides a good approximation of testicular volume without requiring more complex measurement techniques.

Q2: What's considered normal volume?
A: Adults: 10-20 cm³ per testis. Prepubertal: 1-2 cm³. Pubertal range varies by Tanner stage.

Q3: How accurate is this method?
A: It's about 90% accurate compared to water displacement (gold standard), making it clinically useful.

Q4: When is volume assessment important?
A: For evaluating fertility issues, puberty disorders, hypogonadism, and monitoring testicular changes over time.

Q5: How do measurements vary by age?
A: Volume increases during puberty (Tanner stages) and may decrease with aging or certain medical conditions.