Pulmonary Fibrosis is classified as a Restrictive lung disease and primarily affects the structure of the lung. It is characterized by an increased stiffness of the lung and a loss of functional alveolar surface area. The increased stiffness acts to reduce lung capacity. The decrease in alveolar surface area reduces the ability of the lungs to transfer oxygen and carbon dioxide.
Pulmonary Fibrosis status is best monitored by FVC, DLCO and Oximetry.
A typical PFT pattern for Pulmonary Fibrosis:
|FEV1||Normal or reduced|
|FEV1/FVC Ratio||Normal or Elevated|
The severity of Pulmonary Fibrosis is determined by the decrease in TLC:
|TLC >=60% and <80% of predicted||Mild restriction|
|TLC >=40% and <60% of predicted||Moderate restriction|
|TLC <40% of predicted||Severe restriction|
PFT Patient by Richard Johnston is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.