Author Question: If the relative humidity of a gas is 55 and the capacity is 18 mg/L, the absolute humidity is _____ ... (Read 115 times)

Medesa · **on:** Jul 16, 2018

If the relative humidity of a gas is 55 and the capacity is 18 mg/L, the absolute humidity is _____ mg H2O/L.

a. 10 c. 22.5
b. 12 d. 25.2

Question 2

A patient reports a dry nose and throat. He is receiving 6 L of O2 through a nasal cannula. Which of the following is most appropriate to address the patient's dry nose and throat?

a. Decrease the oxygen flow rate to 3 L.
b. Add a low-flow bubble humidifier.
c. Suggest an aerosol treatment with a mu-colytic agent.
d. Take no action.

joneynes · **Reply #1 on:** Jul 16, 2018

Answer to Question 1

ANS: A
RH = (content AH)/capacity.
0.55 = x/18 mg H2O/L.
x = 10 mg H2O/L.

Answer to Question 2

ANS: B
If a nasal cannula is set to deliver more than 5 L/min, humidification will be necessary. A low-flow bubble humidifier humidifies the gas traveling to the patient through a nasal cannula with approximately 40 to 50 of the relative humidity at standard room temperatures. See Figure 6-4. The other options are not applicable.