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
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.
You might also like to view...
True or false (circle one). The thoracic spine is susceptible to bending stresses, which can cause an exaggerated kyphotic curve
Indicate whether the statement is true or false.
Which of the following statements applies to a lung unit with higher resistance than normal?
a. A given volume change will require less of a pressure change. b. It will fill and empty more rapidly than a normal lung unit. c. There will be less volume change for a given pressure change. d. Volume to this area will remain the same under all conditions.
Tonsillitis can be caused by either bacterial or viral infections
Indicate whether the statement is true or false
The number 5 on the figure demonstrates
 FIGURE 1.png)
A. flexion.
B. extension.
C. abduction.
D. adduction.