Figure 1From: A basic study on molecular hydrogen (H2) inhalation in acute cerebral ischemia patients for safety check with physiological parameters and measurement of blood H2 levelHydrogen concentration (HC) in the blood before, during and after hydrogen (H 2 ) inhalation. HC (micromol/L) in the arterial(red) and venous (blue) blood before (5 min. before), during (0-30min.) and after (30 min to 60 min) H2 gas inhalation. Case1 (square marks) inhaled 4% H2 gas and case 2 (triangle marks) and case 3 (round marks) inhaled 3% H2 gas. The HC at the plateau level reached the equivalent values reported in the successful animal experiments. Presence of a hump in the descending venous blood concentration curve may indicate the source of extra H2, coming out of slow blood flow/slow release compartments such as muscle and skin.Back to article page