1. What is Vital Capacity of Lung?

Vital Capacity of Lung is the total amount of air exhaled after maximal inhalation. The value is about 4800mL and it varies according to age and body size.

2. How Does the Calculator Work?

The calculator uses the Vital Capacity formula:

Where:

• \( VC \) — Vital Capacity of Lung (m³)
• \( TV \) — Tidal Volume (m³)
• \( IRV \) — Inspiratory Reserve Volume (m³)
• \( ERV \) — Expiratory Reserve Volume (m³)

Explanation: The formula calculates the maximum amount of air a person can expel from the lungs after a maximum inhalation by summing the three lung volume components.

3. Importance of Vital Capacity Calculation

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

4. Using the Calculator

Tips: Enter Tidal Volume, Inspiratory Reserve Volume, and Expiratory Reserve Volume in cubic meters. All values must be positive numbers.

5. Frequently Asked Questions (FAQ)

Q1: What is the normal range for Vital Capacity?
A: Normal Vital Capacity ranges from 3-5 liters in healthy adults, but varies based on age, gender, height, and physical condition.

Q2: How does Vital Capacity change with age?
A: Vital Capacity typically decreases with age due to reduced lung elasticity and respiratory muscle strength.

Q3: What conditions affect Vital Capacity?
A: Conditions like 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, where the patient takes a deep breath and exhales completely into the spirometer.

Q5: Can Vital Capacity be improved?
A: Yes, through regular exercise, breathing exercises, and pulmonary rehabilitation programs, Vital Capacity can often be improved.