15th July 2024

A 39-year-old male presented with pulmonary haemorrhage and an acute kidney injury

A 39-year-old male presented with pulmonary haemorrhage and an acute kidney injury secondary to anti-neutrophil cytoplasmic antibody-positive vasculitis.  She required treatment with immunosuppression and dialysis but due to failure to improve was plasma exchanged.  A number of weeks later, her renal function had recovered enough to cease dialysis and the vasculitis was no longer clinically active.

What is the likely mechanism of plasma exchange in this patient?

Select the SINGLE most appropriate option from the list below. Select ONE option only.