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Normal FEV1 and FVC 80-120% predicted. FEV1/VC increased: suggests restriction. FEV1/VC < LLN (ATS) or < 70% (GOLD): airflow. Either forced (FVC) or slow (SVC) vital capacity can be used to determine FEV1/VC ratio obstruction present. - Severity* Mild Moderate Severe.
Estimated Vital Capacity. Vital capacity can be indirectly estimated based on gender, age and height in centimetres. VC for men = [(27.63 – 0.112 x Age in years) x Height in cm] / 1000; VC for women = [(21.78 – 0.101 x Age in years) x Height in cm] / 1000
12 Ιουλ 2024 · In contrast to the lung capacities calculated from spirometric measurements (see the lung capacity calculator), this calculator uses a vital capacity equation that estimates the theoretical, predicted value.
Sex-specific reference equations for individuals of European ancestry aged 5 to 80 years were derived for total lung capacity (TLC), forced residual capacity (FRC), residual volume (RV), inspiratory capacity (IC), vital capacity (VC), expiratory reserve volume (ERV), and RV/TLC.
Forced Vital Capacity (FVC): The volume delivered during an expiration made as forcefully and completely as possible starting from full inspiration. Forced Expiratory Volume in the first second (FEV1): The volume delivered in
The equations take Height in m (conversion is built in). Formulas by the Association for Respiratory Technology and Physiology (www.artp.org.uk).
This FEV1 FVC ratio calculator determines the ratio of the forced expiratory volume in the first second to the forced vital capacity of the lungs.
