Author Question: Which of the following NIV settings produces the greatest tidal volume, with all other variables ... (Read 75 times)

Metfan725 · **on:** Jul 16, 2018

Which of the following NIV settings produces the greatest tidal volume, with all other variables being equal (i.e., airway resistance and lung compliance)?

a. IPAP = 20 cm H2O; EPAP = 8 cm H2O
b. IPAP = 15 cm H2O; EPAP = 5 cm H2O
c. IPAP = 12 cm H2O; EPAP = 6 cm H2O
d. IPAP = 18 cm H2O; EPAP = 4 cm H2O

Question 2

Overtightening of the headgear straps for a nasal mask may lead to which of the following?

a. Lack of an air leak
b. Facial skin irritation
c. Nasal air leak
d. Hypersalivation

af · **Reply #1 on:** Jul 16, 2018

Answer to Question 1

ANS: D
If everything is equal, the largest tidal volume will be produced with the greatest pressure sup-port DIF.

Answer to Question 2

ANS: B
Overtightened headgear straps can lead to redness and irritation of the skin and the potential for ulceration. Straps that are too tight may cause the mask to leak more. Nasal air leak is a disad-vantage of mouthpieces, as is hypersalivation.