1. What is Vital Capacity?

Vital Capacity is the maximum amount of air a person can expel from the lungs after a maximum inhalation. It represents the sum of inspiratory reserve volume, tidal volume, and expiratory reserve volume.

2. How Does the Calculator Work?

The calculator uses the Vital Capacity formula:

Where:

• \( IRV \) — Inspiratory Reserve Volume (L)
• \( TV \) — Tidal Volume (L)
• \( ERV \) — Expiratory Reserve Volume (L)

Explanation: This formula calculates the total lung capacity that can be voluntarily mobilized during breathing.

3. Importance of Vital Capacity Measurement

Details: Vital Capacity measurement is crucial for assessing lung function, diagnosing respiratory conditions, monitoring disease progression, and evaluating treatment effectiveness in pulmonary diseases.

4. Using the Calculator

Tips: Enter IRV, TV, and ERV values in liters. All values must be non-negative. Typical adult values range from 3-5 liters, but vary based on age, gender, height, and physical condition.

5. Frequently Asked Questions (FAQ)

Q1: What are normal vital capacity values?
A: Normal values typically range from 3-5 liters in adults, but vary based on age, gender, height, and physical condition.

Q2: How does vital capacity change with age?
A: Vital capacity generally decreases with age due to reduced lung elasticity and chest wall compliance.

Q3: What conditions affect vital capacity?
A: Conditions such as COPD, asthma, pulmonary fibrosis, and neuromuscular disorders can significantly reduce vital capacity.

Q4: How is vital capacity measured clinically?
A: Clinically, vital capacity is measured using spirometry, which records the volume of air inhaled and exhaled.

Q5: Can vital capacity be improved?
A: Yes, through regular exercise, breathing exercises, and maintaining good respiratory health, vital capacity can be improved or maintained.