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.