Pulmonary Function Test Normal Values By Age Chart
If you have been recommended a pulmonary function test, it is important to know what to expect. This test measures how well your lungs are working by measuring your lung capacity, airflow, and how well oxygen is transferring into your bloodstream. It is a non-invasive test that is painless and usually takes about 30 minutes to complete. However, the results of the test can be crucial in diagnosing and treating many lung diseases.
Why is a Pulmonary Function Test Important?
A Pulmonary Function Test (PFT) is important for several reasons. It can help diagnose lung problems, determine the severity of lung diseases, and monitor how well treatments are working. The test can also be used to identify lung problems before symptoms appear, which can help prevent serious complications. Moreover, the test can help determine if a patient is a good candidate for lung surgery or if they need supplemental oxygen therapy.
What are the Normal Values for a Pulmonary Function Test?
The normal values for a Pulmonary Function Test vary based on age, sex, height, and weight. A chart is used to compare the measured values with the expected values based on these factors. Here are the normal values for a PFT by age:
Newborns to 5 years old
During this age group, normal values for the forced expiratory volume (FEV) are typically between 0.5 and 1 liter. The forced vital capacity (FVC) is usually between 0.6 and 1.3 liters.
6 to 13 years old
For this age group, normal values for the FEV range from 1 to 3 liters, while the FVC ranges from 1.2 to 4 liters.
14 to 18 years old
Normal values for the FEV in this age group are around 3 to 5 liters, while the FVC is typically between 3.7 and 5.5 liters.
19 to 40 years old
Normal values for the FEV in this age group are around 4 to 5 liters, while the FVC is typically between 4.5 and 5.5 liters.
41 to 60 years old
For this age group, normal values for the FEV range from 3 to 4 liters, while the FVC ranges from 3.5 to 5 liters.
Over 60 years old
Normal values for the FEV in this age group are around 2 to 4 liters, while the FVC is typically between 3 and 4.5 liters.
What Can Affect Pulmonary Function Test Results?
Several factors can affect the results of a Pulmonary Function Test. These include smoking, respiratory infections, asthma, chronic obstructive pulmonary disease (COPD), heart disease, and obesity. Additionally, certain medications may interfere with the test results. It is important to let your healthcare provider know if you are taking any medications before the test.
Conclusion
A Pulmonary Function Test can give your healthcare provider valuable information about how well your lungs are working. Knowing the normal values for this test based on your age can help you understand your results and identify any potential lung problems. If you are experiencing symptoms such as shortness of breath, coughing, or chest pain, talk to your healthcare provider about whether a Pulmonary Function Test is right for you.