Conclusion
Graphic patterns in TBFVL may suggest airway obstruction at a particular
site (larynx or below the larynx and may also suggest an associated
component of reactive airway disease). TBFVL pattern may also indicate
improvement in the follow-up either spontaneously or after an
intervention. Therefore, if the facility of TBFVL is available, it may
be used as a screening test for airway anomalies, and invasive
bronchoscopy procedures may be avoided in many infants with airway
anomalies. However, the TBFVL pattern usually suggests a site of
obstruction but not a specific diagnosis.