Which of the following interfaces appear to be more efficient to improve ventilation? 1. Nasal pillows 2. Full-face mask 3. Nasal mask 4. Oral mask
a. 1 only
b. 1 and 2 only
c. 1, 2, 3, and 4
d. 1 and 4 only
ANS: B
The investigators reported that the full-face mask and nasal pillows improved ventilation more than the nasal mask but that the nasal mask was better tolerated.
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