The aim of this work to examine the effect of the gas-liquid hybrid discharge treatment system on some hematological parameters. The gas-liquid hybrid discharge (HD) reactor consists of high voltage point discharge electrode above blood surface and cylinderical ground copper electrode containing the blood (in the same time act as the vessel reactor). The HD could produce both arc discharge in gas phase and liquid phase. The high energy plasma arc produces a pressure shock wave, electromagnetic radiations,
ozone and free radicals. For basic hematology we determined the hematocrit (HCT), hemoglobin (HGB), mean corpuscular volume (MCV), mean corpuscular hemoglobin (MCH), and mean corpuscular hemoglobin concentration (MCHC). For differential blood count the number of red blood cells (RBC) and white blood cells (WBC), which were further differentiated into lymphocytes, monocytes, granulocytes, and platelets, were measured.