FVC (Forced Vital Capacity)

FVC (Forced Vital Capacity)

The Forced Vital Bapacity, FVC, is the amount of air a person can forcefully and quickly exhale after taking a deep breath. The FVC test can be performed via a spirometer and it is one of the three most significant lung function tests used to diagnose and monitor chronic lung diseases.

How to Ensure You Are Performing Spirometry Correctly

In order to achieve correct, reliable, and accurate results, it is crucial to perform correct spirometry. Watch the video below for full guidance during spirometry.

 

FVC results after testing are compared to predicted test values obtained based on age, ethnicity, height, and weight. The predicted values can differ from person to person.

FVC (Forced Vital Capacity)

FVC (Forced Vital Capacity)

(Graham, Brian L., et al. “Standardization of Spirometry 2019 Update. An Official American Thoracic Society and European Respiratory Society Technical Statement.” American Journal of Respiratory and Critical Care Medicine, vol. 200, no. 8, 2019, doi:10.1164/rccm.201908-1590st.)

For both obstructive and restrictive lung diseases, FVC can decrease.  Therefore, FEV1/FVC ratio is often referred to when determining the patient’s condition and distinguishing obstructive and restrictive lung diseases.

Sources

  1. “FEV1 And FVC: What Do They Mean for You?: Lung Health Institute.” Lung Health Instititute, 11 Feb. 2018
  2. Graham, Brian L., et al. “Standardization of Spirometry 2019 Update. An Official American Thoracic Society and European Respiratory Society Technical Statement.” American Journal of Respiratory and Critical Care Medicine, vol. 200, no. 8, 2019, doi:10.1164/rccm.201908-1590st.

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