Diagnosis and Management of Transient Tachypnea of the Newborn

Clinical Presentation and Diagnosis

The American Academy of Pediatrics recommends that Transient Tachypnea of the Newborn (TTN) be diagnosed based on clinical presentation and characteristic imaging findings, with lung ultrasound as the preferred imaging modality, which is as accurate as chest X-ray but provides more specific diagnostic findings 1, 2
The European Respiratory Society suggests that lung ultrasound should be the first-line imaging modality for suspected TTN, as it is as accurate as chest X-ray but provides pathognomonic findings 1, 2, 3

Characteristic ultrasound findings for TTN include bilateral confluent B-lines in dependent lung areas, normal or near-normal lung appearance in superior fields, pleural line thickening, and an alternating pattern of interstitial syndrome with areas of normal lung 1, 2, 3, 4, 5, 6
The presence of normal lung areas on ultrasound distinguishes TTN from Respiratory Distress Syndrome (RDS) 3, 5

The workup must distinguish TTN from conditions requiring different management, including RDS, pneumonia, and meconium aspiration syndrome, using ultrasound findings and clinical presentation 1, 2, 3, 5, 6
Ultrasound findings for RDS include diffuse bilateral confluent B-lines throughout all lung fields, pleural line abnormalities, and absence of any spared/normal areas 1, 2, 3
Ultrasound findings for pneumonia include consolidations with dynamic air bronchograms, pleural effusion, and abnormal pleural line 3, 5, 6