Vital capacity
Vital Capacity[edit | edit source]
Vital Capacity (VC) is a critical measure in pulmonary function tests, representing the maximum amount of air a person can exhale after a maximum inhalation. It is a key indicator of lung health and function.
Definition and Importance[edit | edit source]
Vital capacity is the total volume of air that can be exhaled after fully inhaling. This lung measurement is essential for evaluating respiratory health, particularly in the diagnosis and monitoring of chronic lung conditions.
Measurement[edit | edit source]
Vital capacity is commonly measured using a device called a spirometer. The test involves:
- Taking a deep breath to fill the lungs to maximum capacity.
- Exhaling as much air as possible into the spirometer.
Clinical Significance[edit | edit source]
VC is crucial in assessing conditions such as:
- Chronic obstructive pulmonary disease (COPD)
- Asthma
- Restrictive lung diseases
It helps in determining the extent of lung function impairment.
Factors Affecting Vital Capacity[edit | edit source]
Several factors can influence VC, including:
- Age
- Gender
- Body size
- Physical conditioning
- Smoking habits
- Environmental factors
External Links[edit | edit source]
- American Lung Association - Spirometry
- National Center for Biotechnology Information - Vital Capacity
Vital capacity Resources | |
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