COVID-19 Pneumomediastinum: Possible Role of Transesophageal Echo in Bedside Percutaneous Bicaval Double-Lumen ECMO Cannulation in Children. A Case Report.

COVID-19 is generally uneventful in children. Only 8% of severe acute respiratory distress syndrome corona virus 2 pediatric patients require intensive care; of these, 1% may need extracorporeal membrane oxygenation. Preexisting medical conditions are an independent risk factor for pediatric intensive care unit admission. We describe the case of an 11-year-old girl with adenosine deaminase 2 deficiency who presented severe COVID-19 acute respiratory distress syndrome, complicated by a massive air leak syndrome. The respiratory failure, refractory to conventional support, required veno-venous extracorporeal membrane oxygenation. To prevent viral diffusion, bicaval double-lumen cannulation was performed percutaneously at the bedside under exclusive echo guidance. Because of pneumomediastinum, pneumothorax, and subcutaneous emphysema, ultrasound visualization of the heart was possible only with transesophageal echo. To our knowledge, this is the first description of a transesophageal echo guided bedside percutaneous bicaval double-lumen extracorporeal membrane oxygenation cannulation in a pediatric patient. Pitfalls of the technique are highlighted.