Polymyxin B haemoperfusion treatment for respiratory failure and hyperferritinaemia due to COVID-19.

A 69-year-old man with a history of type 2 diabetes and high blood pressure was diagnosed with coronavirus disease 2019 (COVID-19). He had hyperferritinaemia and respiratory failure. Despite the initiation of favipiravir and high-dose corticosteroid and ceftriaxone, his respiratory failure progressed and serum ferritin levels increased. After polymyxin B-immobilized fibre column direct haemoperfusion (PMX-DHP) therapy, there was improvement of the respiratory failure and hyperferritinaemia. We report the first case of COVID-19-induced hyperferritinaemia and severe respiratory failure successfully treated by PMX-DHP.