[HTML][HTML] Severe COVID-19 ARDS treated by bronchoalveolar lavage with diluted exogenous pulmonary surfactant as salvage therapy: In pursuit of the holy grail?

B Ruaro, P Confalonieri, R Pozzan, S Tavano… - Journal of Clinical …, 2022 - mdpi.com
B Ruaro, P Confalonieri, R Pozzan, S Tavano, L Mondini, E Baratella, A Pagnin, S Lerda…
Journal of Clinical Medicine, 2022mdpi.com
Background: Severe pneumonia caused by coronavirus disease 2019 (COVID-19) is
characterized by inflammatory lung injury, progressive parenchymal stiffening and
consolidation, alveolar and airway collapse, altered vascular permeability, diffuse alveolar
damage, and surfactant deficiency. COVID-19 causes both pneumonia and acute respiratory
distress syndrome (COVID-19 ARDS). COVID-19 ARDS is characterized by severe
refractory hypoxemia and high mortality. Despite extensive research, the treatment of COVID …
Background
Severe pneumonia caused by coronavirus disease 2019 (COVID-19) is characterized by inflammatory lung injury, progressive parenchymal stiffening and consolidation, alveolar and airway collapse, altered vascular permeability, diffuse alveolar damage, and surfactant deficiency. COVID-19 causes both pneumonia and acute respiratory distress syndrome (COVID-19 ARDS). COVID-19 ARDS is characterized by severe refractory hypoxemia and high mortality. Despite extensive research, the treatment of COVID-19 ARDS is far from satisfactory. Some treatments are recommended for exhibiting some clinically positive impacts on COVID-19 patients although there are already several drugs in clinical trials, some of which are already demonstrating promising results in addressing COVID-19. Few studies have demonstrated beneficial effects in non-COVID-19 ARDS treatment of exogenous surfactant, and there is no evidence-based, proven method for the procedure of surfactant administration.
Aim
The aim of this work is to underline the key role of ATII cells and reduced surfactant levels in COVID-19 ARDS and to emphasize the rational basis for exogenous surfactant therapy in COVID-19 ARDS, providing insights for future research.
Methods
In this article, we describe and support via the literature the decision to administer large volumes of surfactant to two patients via bronchoalveolar lavage to maximize its distribution in the respiratory tract.
Results
In this study, we report on two cases of COVID-19 ARDS in patients who have been successfully treated with diluted surfactants by bronchoalveolar lavage, followed by a low-dose bolus of surfactant.
Conclusion
Combining the administration of diluted, exogenous pulmonary surfactant via bronchoalveolar lavage along with the standard therapy for SARS-CoV-2-induced ARDS may be a promising way of improving the management of ARDS.
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