Therapeutic plasma exchange in patients with COVID-19 pneumonia in intensive care unit: Cases series.

Introduction: COVID 19 pneumonia can lead to an inappropriate inflammatory response, and can be complicated by acute respiratory distress syndrome, multivisceral failure with a high mortality rate.

Objective: To observe the effect of therapeutic plasma exchange on the excessive inflammatory response.

Materials And Methods: In this study, we included 7 confirmed cases of COVID-19 in the intensive care unit (ICU) department of the university hospital of Oujda. COVID-19 cases were confirmed by RT PCR (reverse transcription-polymerase chain) and CT (computerized tomography) imaging according to WHO guidelines. Therapeutic plasma exchange was performed decrease cytokine storm-induced ARDS (Acute respiratory distress syndrome). Inflammation marker assays were performed before and after therapeutic plasma exchange to assess its efficacy.

Results: Levels of inflammatory cytokines (IL-6) and acute phase response proteins, including ferritin and CRP, were elevated before therapeutic plasma exchange.After therapeutic plasma exchange, levels of acute phase reactants, inflammatory mediators, were significantly reduced (p < 0.05).

Conclusion: Our data suggest that therapeutic plasma exchange reduces the inflammatory response in patients with severe COVID-19 not undergoing mechanical ventilation. Further studies are needed to explore the efficacy of therapeutic plasma exchange in patients with COVID-19.