Interpretation Guidelines 1
Guidelines
- Normal for FVC, FEV1, FEF25%-75%, and PEFR is between 80% and 120% of what has been predicted for the patient.
- Often, the test is performed before and after the administration of a bronchodilator. Improvement is noted as in the table below:
![spirometry interpretation guidelines table](https://mededu.blob.core.windows.net/public/assets/spirometry/interpretation.gif)
Chart
![spirometry interpretation guidelines chart](https://mededu.blob.core.windows.net/public/assets/spirometry/interpretation2.gif)
Authored by William A. French. Medically reviewed by Dr. Barbara Erickson, PhD, RN, CCRN.