Figure 3.

Inconsistency of blood HC after initial H₂inhalation and subsequent improvement with more attention. HC in the venous blood varied widely, ranged from less than 1 microM to 25 microM/L on the first day of 30-min H₂ inhalation. After closer observation at bedside and encouragement, the HC level and consistency improved. In two patients (Case No.8 and10) with pulmonary disease, the initial low HC significantly improved with simultaneous slow intravenous infusion of H₂ enriched saline solution (from 1.2 to 12.1 microM/L in case No.8, from 0.5 to 8.2 microM/L in case No.10).