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BACKGROUND: This study was aimed to assess the efficacy and safety of tocilizumab (TCZ) and to investigate the factors related to the progress and mortality of patients with a secondary cytokine release syndrome caused by SARS-CoV-2. METHODS: A retrospective descriptive observational study of hospitalised patients with a positive polymerase chain reaction (PCR) result for SARS-CoV-2 and whose clinical evolution required the administration of one or more doses of TCZ was conducted. Demographic variables, clinical evolution, radiologic progress and analytical parameters were analysed on days 1, 3 and 5 after administration the first dose of TCZ. RESULTS: A total of 75 patients with a clinical history of Accurate Respiratory Distress Syndrome (ARDS) were analysed, among whom, 19 had mild ARDS (25.3%), 37 moderate ARDS (49.4%) and 19 severe ARDS (25.3%). Lymphocytopenia and high levels of PCR, d-Dimer and IL-6 were observed in almost all the patients (91.8%). Treatment with TCZ was associated with a reduction of lymphocytopenia, C-reactive protein (CRP) levels, severe ARDS cases and fever. Although a better evolution of PaO(2)/FiO(2) was observed in patients who received two or more doses of TCZ (38/75), there was an increase in their mortality (47.4%) and ICU admission (86.8%). The 30-day mortality rate was 30.7% (20.5–42.4% CI) being hypertension, high initial d-dimer levels and ICU admission the only predictive factors found. CONCLUSION: Based on our results, treatment with TCZ was associated with a fever, swelling and ventilator support improvement. However, there is no evidence that the administration of two or more doses of TCZ was related to a mortality decrease.
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10.1007/s43440-020-00186-z
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document_parses/pdf_json/3421996d2ce03f5ea86a73b05981b7ed500f257e.json
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document_parses/pmc_json/PMC7650573.xml.json
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The effect of tocilizumab on cytokine release syndrome in COVID-19 patients
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