If a Venturi mask is set at 28 and the liter flow is set above the set liter flow prescribed on the ...

(Answer to Q. 1)  ANS: A
The flow of oxygen to the nozzle is constant, so an obstruction will increase the FIO2 but not the flow.

(Answer to Q. 2)  ANS: D
The FIO2 levels delivered by a nasal cannula vary with the flow rate setting. Generally, the FIO2 increases by about 4 for each liter of flow increase beginning with 1 L/min delivering approxi-mately 24 oxygen.

(Answer to Q. 3)  ANS: D
High-flow devices are also called fixed-performance devices because they provide oxygen at flow rates high enough to completely satisfy a patient's inspiratory demands. These high-flow oxy-gen-delivery devices include air-entrainment masks (Venturi masks), incubators, oxygen tents, oxygen hoods, and high-volume aerosol devices.

(Answer to Q. 4)  ANS: D
A patient with chronic obstructive pulmonary disease requires a precise FIO2 because of carbon dioxide (CO2) retention issues. The only precise FIO2 device is a Venturi mask, which is consid-ered a high-flow device.

(Answer to Q. 5)  ANS: C
Partial obstruction of oxygen flow downstream of the jet orifice or partial obstruction of the en-trainment ports will decrease the amount of room air entrained, thus raising the FIO2 of the deliv-ered gas.

This calls for a celebration

I get paid? lol

My pleasure