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Forced Oscillation Technique (FOT)
Forced Oscillometry Technique (FOT) is a simple, non‑invasive breathing test that checks how well your airways are working. An FOT test (also called a respiratory oscillometry test or airway resistance test) helps doctors understand how easily air moves in and out of your lungs.
FOT is especially useful for people with asthma, COPD, or ongoing breathing symptoms. It measures airway resistance using gentle sound waves while you breathe normally. There are no big breaths, no hard blowing, and no effort needed — which makes the Forced Oscillometry Technique ideal for children, older adults, and anyone who struggles with traditional lung tests like spirometry.
During the Forced Oscillometry Technique, you simply breathe through a mouthpiece while the machine sends tiny vibrations (sound waves) into your airways. These waves help the system measure how open or tight your airways are. The results help your doctor understand your lung mechanics, check for early airway changes, and monitor how well your treatment is working.
The Forced Oscillometry Technique is quick, comfortable, and highly sensitive, making it a trusted tool for assessing lung health.
What is the Forced Oscillometry Technique?
It is a breathing test that uses gentle sound waves to check how easily air moves through your lungs.
Why do I need an FOT test?
An FOT test helps diagnose and monitor conditions like asthma, COPD, and other breathing problems.
Does the Forced Oscillometry Technique hurt?
No. It is completely painless and very easy to do.
How does the test work?
You breathe normally through a mouthpiece while the machine sends small sound waves into your airways to measure resistance.
Is the Forced Oscillometry Technique safe?
Yes. It is non‑invasive and uses harmless sound waves.
What can the Forced Oscillometry Technique detect?
It can pick up early airway changes, measure airway resistance, and help doctors understand how well your lungs are working.
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