Under which of the following conditions would you postpone a ...

[tatyanajohnson]

Under which of the following conditions would you postpone a diffusing capacity test?
 
  1. Just before the test, the patient smoked two cigarettes.
  2. Just before the test, the patient had an episode of severe coughing.
  3. Just before the test, the patient had a long wait at a busy bus stop.
  a. 1 only
  b. 1 and 3 only
  c. 2 and 3 only
  d. 1, 2, and 3

Question 2

Which gas normally used to measure the diffusing capacity of the lung?
 
  a. O2
  b. CO
  c. CO2
  d. He

[annierak]

Answer to Question 1

ANS: B
Performing the diffusing capacity on patients who have recently smoked a cigarette or who have been exposed to environmental carbon monoxide may hinder test validity.

Answer to Question 2

ANS: B
Carbon monoxide (CO) is the gas normally used to measure the diffusion capacity (DL) of the lung. The diffusing capacity of the lung for carbon monoxide (DLCO) is expressed in ml/min/mm Hg under standard temperature and pressure and dry conditions.