| A | B |
|---|
| Normal PFT | 80% - 100% of predicted |
| Mild | 60% - 79% of predicted |
| Moderate | 40% - 59% of predicted |
| Severe | less than < 40% of predicted |
| Restrictive Only disorder | decreased volumes |
| Obstructive Only disorder | decreased flows |
| Restrictive & Obstructive disorder | decreased flows and volumes |
| What is considered a volume? | VC or FVC |
| What is considered a flow | FEV1; FEV1/FVC |
| Examples of obstructive disorders | Bronchitis, COPD, Asthma, Emphysema, OSA, Bronchiectasis |
| Examples of restrictive disorders | ARDS, Pulmonary fibrosis, Interstitial lung disease, Pleural effusions, Spinal/thoracic deformities, Pulmonary edema |
| Total Lung Capacity | VC + RV; IRV + VT + ERV +RV |
| Vital Capacity | IRV + VT + ERV + RV |
| Inspiratory Capacity | IRV + VT |
| Functional Residual Capacity | ERV + RV |
| Residual Volume | Can't be directly measured |
