What is the predicted FVC?

In general, your predicted percentages for FVC and FEV1 should be above 80% and your FEV1/FVC Ratio percentage should be above 70% to be considered normal.

How do you calculate the FVC?

The FEV1/FVC ratio is the ratio of the forced expiratory volume in the first one second to the forced vital capacity of the lungs….Formulas

  1. FEV1 = Race x 1.08 x [(0.0395 x Height) – (0.025 x Age) – 2.6]
  2. FVC = Race x 1.15 x [(0.0443 x Height) – (0.026 x Age) – 2.89]
  3. FEV1/FVC Ratio = FEV1 / FEVC.

What does the FVC value measure?

Forced vital capacity (FVC) is the amount of air that can be forcibly exhaled from your lungs after taking the deepest breath possible, as measured by spirometry.

How do you predict FVC and FEV1?

A very strong, age-independent linear relationship between FEV1 and FVC was found in healthy individuals (the correlation coefficient r = 0.96). It can be described with the equation FEV1 = A x FVC + C, where A = 0.84 and C = −0.23 (−0.36) for females (males).

How do you calculate predicted spirometry?

The multiple regression equations derived from this study were:

  1. For males. Predicted FEV1 = -1.7649+ (-0.0218* age) + (0.0337* height) (SEE = 0.434; R2 = 0.42.
  2. For females. Predicted FEV1 = 0.0381+ (-0.0197* age) + (0.0196* height) (SEE = 0.370; R2 = 0.41.

What Is percent predicted FEV1?

A derived value of FEV1% is FEV1% predicted, which is defined as FEV1% of the patient divided by the average FEV1% in the population for any person of similar age, sex, and body composition.

What is a normal FVC liters?

Forced vital capacity is the total amount of air that can be exhaled following a deep inhalation in an FVC test. Thenormal FVC range for an adult is between 3liters and 5liters.

What does FEV1 FVC tell you?

The FEV1/FVC is a ratio that reflects the amount of air you can forcefully exhale from your lungs. This ratio is often used in diagnosing and monitoring the treatment of lung diseases such as chronic obstructive pulmonary disease (COPD).

How is predicted DLCO calculated?

  1. Predicted DLCO adjusted for hemoglobin is converted from mL CO/min/mmHg to mmol/min/kPa by multiplying by a factor of 0.3348.
  2. For females of any age and children less than 15 years old, the Age-Sex-Factor is 9.38.
  3. For males 15 years old or older, the Age-Sex-Factor is 10.22.