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Most portable bi-level positive airway pressure devices are not equipped with air-oxygen blenders for precisely regulating oxygen concentrations, and supplemental oxygen must be added to increase the F(IO2). Very few studies have investigated the factors that affect F(IO2), and their conclusions have been inconsistent. We investigated in vitro noninvasive ventilation (NIV) parameters and their effects on F(IO2), particularly the effect of the oxygen injection site.

Oxygen Injection Site Affects FIO2During Noninvasive Ventilation

Oxygen Injection Site Affects F_IO₂During Noninvasive Ventilation