Background and purpose : Arterial blood gases ( Arterial blood gas [ABG] ) One of the most important Laboratory tests to determine the status PH the amount of oxygen and carbon dioxide blood levels of bicarbonate. Also, hemoglobin and serum lactate and electrolytes and also won the Test . Height and air pressure can vary on ABG and its surface, low pressure conditions at high altitude pilots place on arterial blood gases are subject to change, this can important steps to investigate the relationship of these changes are in line with the compilcations may occur in different organs pilots during flight. Materials and Methods : This AD research and in terms of the S mode using content analysis ( Content Analysis ) And took note of the material used in several papers to prove the correctness of the opinion of the clay, and only ten The theory is or not. The method of collection and compilation of information via the library resources, the Internet and text of the H-point Military Medicine (Aerospace Medicine) the analysis are discussed. Results : Arterial blood gases (ABG) show variations in different conditions. ABG include: PH , HCO 3 - , PO 2 , Base exces, sPCO 2 , SO2 is. SBCe rate also (Bicarbonate concentration in the blood) and And Total also acquired the ABG. Discussion And conclusions : ABG and changes in their altitude and conditions Haypvbar few studies have been conducted. Most of these studies examined people who have climbed mountains, and changes in the elevation of arterial blood gases is limited. Similar studies in Chambr Haypvbar conditions or when flying in an airplane took place on arterial blood gas changes, but the research done altitudes Like Somogy and colleagues examined the Mountaineers to a metabolic alkalosis due to the hypoxia caused by Hypo ventilated with Kmvrsptvr stimulation was observed.