Evaluation of Adsorption Therapy as an Extracorporeal Blood Purification Technique in Critically Ill Covid-19 Patients

We aimed to evaluate the efficacy of adsorption therapy as an extracorporeal blood purification technique in critically ill patients with Coronavirus disease 2019 (COVID-19). A retrospective analysis was performed on 17 adult patients with severe COVID-19, who underwent adsorption therapy using an HA330 cartridge, at Ankara City Hospital. Each adsorption therapy was administered for three consecutive days, and each therapy session lasted three hours. Several parameters, including cytokine levels, blood count, biochemistry panel, clinical status, and mortality rate were assessed before and after each therapy session. The results obtained from this study revealed that adsorption therapy reduced IL-6 levels and improved oxygenation in the short term. However, heart rate, mean arterial pressure and SOFA score did not demonstrate significant changes. Notably, the dose of norepinephrine increased after the third session. Regrettably, only 4 out of 17 patients (23.5%) survived. Consequently, adsorption therapy appears to be effective in reducing IL-6 levels in severe COVID-19 patients. Nonetheless, further investigation is warranted to evaluate its impact on clinical outcomes.