Objective To describe the efficacy of convalescent plasma transfusion for COVID-19 patients. Methods This is a retrospective study of 6 COVID-19 patients with convalescent plasma at Guizhou Provincial Jiangjunshan Hospital [boxh] a tertial hospital, in Guiyang, Guizhou, China, from January 29, to April 30, 2020; final data of follow-up was May 12, 2020. Through the review of the electronic medical records of Guizhou Jiangjunshan Hospital, clinical data of 6 patients were obtained. Three patients with worsening symptoms after empirical treatment with antivirals were transfused convalescent plasma therapy for the first treatment, while the other three severe or critical COVID-19 patients with rapid progression were transfused. The efficacy of convalescent plasma depends on the relief of symptoms, changes in laboratory indicators and chest imaging abnormalities. Results The PaO2 / FiO2 and lymphocyte count of patients 1, 2 and 3 treated with convalescent plasma treatment for the first treatment period were changed from abnormal to normal. The levels of inflammation markers CRP and IL-6 of the patients decreased significantly. Chest imaging examination showed that the lung lesions gradually subsided. The relapsed patients (No. 4 and No. 6), after using convalescent plasma therapy, turned negative on two consecutive throat swab tests on Day 24 and Day 3, respectively. Conclusions Convalescent plasma treatment of COVID-19 is beneficial for those patients with be difficult to turn to negative or re-positive RT-PCR.
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