FOT (Forced Oscillation Technique) in Lung Function Testing
FOT is a non-invasive pulmonary function test that measures airway resistance and reactance during normal tidal breathing by applying small pressure oscillations at the mouth.
Uses of FOT
Diagnosis and monitoring of asthma
Assessment of COPD
Evaluation of small airway disease
Useful in children, elderly patients, and those unable to perform spirometry
Advantages
✔ Effort-independent
✔ Performed during normal breathing
✔ Sensitive for early small airway changes
✔ Quick and patient-friendly
