Woman admitted for COVID-19 respiratory failure requiring intubation,
renal failure and rising bilirubin, requiring CVVHD. Due to dropping
hemoglobin and platelets, TTP was suspected and empiric plasma exchange
initiated. Platelets normalized; she improved; ADAMTS13 level resulted
50.7%, indicating possible benefit of plasma exchange for COVID19
thrombotic microangiopathy despite normal ADAMTS13.