FOT
FREQUENCY OSCILLATION TESTING (FOT)
This is a modern and relatively unique method of looking at airway narrowing. It works on the principle of different sound wave frequencies (low pitch to slightly higher pitch sounds) travel different distances along the airway. The lowest of these travels the furthest. When this test is carried out multiple low variable sound wave frequencies are sent down the airways and the time to travel down and reflect back are measured. This helps us to diagnose asthma,copd and othe lung disease earlier then by other test.

This test is very simple to perform with gentle breathing and so the airways are not subject to the physical forces that occur when individuals undertake a forced maneuver. It’s added advantage is even small children and old age people can perform who are unable to do pft