Surfactant Administration During Pediatric Extracorporeal Membrane Oxygenation

Mechanical Ventilation during ECMO: Best Practices

Adults and children who require extracorporeal membrane oxygenation for respiratory failure remain at risk for ongoing lung injury if ventilator management is not optimized. This review serves as a guide to assist the bedside clinician in ventilator titration for patients on extracorporeal membrane oxygenation, with a focus on lung-protective strategies. Existing data and guidelines for extracorporeal membrane oxygenation ventilator management are reviewed, including non-conventional ventilation modes and adjunct therapies.

Viability of Mesenchymal Stem Cells in an Ex Vivo Circulation System

Extracorporeal membrane oxygenation (ECMO) is a well-known therapy for refractory cardiac and respiratory failure. Stem cell therapy has been investigated as an adjunctive treatment for use during ECMO, but little is known about the viability of stem cells during ECMO support. We evaluated the viability and activity of mesenchymal stem cells (MSCs) in ex vivo circulation (EVC) conditions. The experimental groups were divided into two subgroups: EVC with oxygenator (OXY group) and EVC without oxygenator (Non-OXY group). Mesenchymal stem cells (1.0 × 10) were injected into the EVC system. Cell counting, a lactate dehydrogenase (LDH) cytotoxicity assay, and the mitochondrial functions of viable MSCs were analyzed. The post-EVC oxygen consumption rate (OCR) was significantly lower than the pre-EVC OCR, regardless of whether the oxygenator was used. The LDH levels were significantly higher in the OXY group than in the Non-OXY group. The cellular loss was mainly due to lysis of the cells whereas the loss of cellular activity was attributed to the nonphysiologic condition itself, as well as the oxygenator. We concluded that direct infusion of MSCs during ECMO support did not serve as adjunctive therapy. Further studies are needed to improve the viability in an ECMO setting.

Surfactant therapy to facilitate weaning in paediatric patients dependent on extacorporeal membrane oxygenation

We are reporting two paediatric cases with severe adenoviral acute respiratory distress syndrome with viral counts of 308 and 119 million copies/mL respectively, who required venoarterial extracorporeal membrane oxygenation (ECMO) support for nearly 3 weeks. They were static on ECMO and had shown a complete lack of response to all therapeutic interventions aimed at decreasing ECMO support. To facilitate weaning from ECMO, they received 2-3 doses of surfactant. This led to dramatic improvement in pulmonary compliance, oxygenation and chest X-ray. They were both weaned off ECMO within 24 hours of receiving surfactant. Surfactant was well tolerated, with no adverse effects. In both cases, weaning from ECMO was possible only after surfactant administration. From our experience, we conclude that surfactant administration is a potentially safe and effective treatment modality that helps weaning from ECMO and should be considered in patients who are dependent on ECMO for long duration.