Fig. 1: Algorithm for the investigation of oesophageal atresia–tracheoesophageal fistula in adult patients with worsening respiratory symptoms.

Proposed algorithm to determine further respiratory investigations based on symptom presentation. Blue boxes denote symptom presentation and clinical evaluation. Arrows denote flow within the algorithm and decision-making process. Red boxes denote the investigation that should be undertaken in the clinical context described. GERD, gastro-oesophageal reflux disease; MII-pH, multichannel intraluminal impedance and pH; PFT, pulmonary function test; TEF, tracheoesophageal fistula; UGI, upper gastrointestinal.