What is the normal value of FEV1/FVC ratio in lung function?
May 10, 2023
Source: Cainiu Health
Dr. Guo Xiheng
Introduction
The normal value for the one-second rate of lung function should be higher than 80%. The one-second rate of lung function refers to the percentage calculated by comparing the volume of air exhaled in the first second with the vital capacity. This value may be influenced by differences in height, age, and gender, but through normal distribution analysis, it is generally accepted that healthy individuals have a one-second rate exceeding 80%.
Under normal circumstances, the reference value for FEV1% (forced expiratory volume in one second as a percentage of forced vital capacity) should be higher than 80%. The detailed explanation is as follows:
FEV1% refers to the percentage of air a person can forcibly exhale in the first second compared to their total lung capacity. This value may vary depending on factors such as height, age, and gender, but through normal distribution analysis, it is generally accepted that healthy individuals have an FEV1% above 80%. A value below 80% indicates abnormal lung function and may suggest chronic obstructive pulmonary disease (COPD). Further diagnostic tests are required for a definitive diagnosis.
If your FEV1% falls below the normal range, it is recommended to quit smoking and avoid alcohol. Avoid going outdoors when air pollution levels are high unless absolutely necessary; if you must go out, wear a mask to protect your nose and mouth. Maintain regular meal times and avoid overly greasy foods—opt instead for a light, healthy diet rich in nutrients to support respiratory recovery and promote overall health.
