Dialysis is a supportive treatment for individuals with severe kidney dysfunction or chronic kidney failure. It does not address the underlying issue in a comprehensive manner; rather, it offers an alternative means of support. The study was conducted at Ibn Sina Teaching Hospital between 27 January and 3 July 2024. The study comprised the monitoring of 20 patients of both sexes, conducted prior to and following the administration of dialysis. The study encompassed an examination of various hematological variables, including an investigation of hemoglobin concentration, as well as an analysis of platelets, white and red blood cells, hematocrit, and biochemical variables in the blood serum, such as triglycerides and cholesterol. The results demonstrated a notable enhancement in haemoglobin levels among patients with kidney failure following dialysis. The haemoglobin level increased, and statistical tests confirmed that this difference was highly significant (p < 0.001), indicating the importance of dialysis in improving oxygenation in patients with kidney failure. The data demonstrated that metabolic alterations were heightened following dialysis. Statistical analyses substantiated that these elevations were markedly statistically significant (p>0.001).