Which of the following is/are the minimum performing characteristics of most noninvasive venti-lators?
1. Mandatory rate of 50 breaths/min or less
2. Inspiratory pressure of 30 cm H2O or less
3. PEEP of 15 cm H2O or less
4. Inspiratory flow of 180 L/min or less at 20 cm H2O
a. 1 only
b. 1, 2, and 3 only
c. 1, 2, 3, and 4
d. 2, 3, and 4 only
ANS: D
Noninvasive positive-pressure ventilators should provide a mandatory rate of 30 breaths/min or less, inspiratory pressure of 30 cm H2O or less, positive end-expiratory pressure (PEEP or end-positive airway pressure [EPAP]) of 15 cm H2O or less, inspiratory flow of 180 L/min or less at 20 cm H2O, ideally an FiO2 from 0.21 to approximately 1.0, minimal rebreathing potential, and antiasphyxia capabilities.
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