The characteristic(s) of low-flow devices is (are): 1. fractional inspired oxygen (FIO2) from 0.22 to 0.60. 2. make use of a nasal cannula. 3. make use of a Venturi mask. 4. make use of a transtracheal catheter
a. 1, 2, and 4 c. 1
b. 1 and 4 d. 1, 2, 3, and 4
ANS: A
All of the choices are low-flow devices except for a Venturi mask. A Venturi mask is an air-entrainment device, all of which are considered to be high-flow devices. Therefore, Venturi masks deliver a precise FIO2.
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