BACKGROUNDAcute kidney injury (AKI) is characterised by sudden impairment of kidney function resulting in the retention of nitrogenous and other waste products normally cleared by the kidneys as well as impairment of acid-base balance, and water homeostasis. AKI is not a single disease but, rather, a designation for a heterogeneous group of conditions that share common diagnostic features. When this impairment is prolonged, erythropoietin secretion by this organ is decreased and toxic metabolites accumulate and cause haematological changes including decrease in Hb, HCT, MCH, MCV, RBC and platelet counts. This study evaluates haematological profile in patients with acute kidney injury.