Extension of the functional range of respiratory and gas exchange responses in repetitive hypoxia

摘要: External respiration and gas exchange were studied in healthy volunteers during a session of intermittent normobaric hypoxia (INH) consisting three cycles breathing alternately hypoxic mixture (10.7% O2) for 5 min normal air min. The ventilatory response increased the successive gradually decreased normoxic intervals. These changes accompanied by an increase carbon dioxide lung air, which was not eliminated pulmonary ventilation However, mean oxygen consumption did change INH because reactivity depth, as well efficiency utilization, from cycle to cycle.