During infant respiration, not only the diameter but also the shape of the trachea may change dramatically. On expiration, the trachea often assumes a buckled configuration that deviates in an angular manner away from the side of the aortic arch at the level of the thoracic inlet. In addition, angular buckling associated with a widening of the pre-vertebral, retropharyngeal, and retrolaryngeal soft tissues may occur posteriorly and inferiorly at the thoracic inlet . In fact, the width of the prevertebral soft tissues may increase to at least twice the AP width of the cervical vertebral bodies on expiration. This soft-tissue fullness may also be noted with flexion of the neck. As the infant matures, the amount of soft tissue decreases.
KeywordsEsophageal Atresia Bronchiolitis Obliterans Reactive Airway Disease Scimitar Syndrome Esophageal Foreign Body
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