Your patient has a tumor blocking the left mainstem bronchus. What additional factor would favor the development of atelectasis?
A) Breathing a nitric oxide mix (iNO)
B)Breathing a helium/oxygen mix (heliox)
C)Breathing a high percentage of oxygen
D)Breathing a low percentage of oxygen

Question

Quizplus · Accepted Answer

Breathing a high percentage of oxygen can lead to absorption atelectasis, as the increase in oxygen concentration can lead to decreased nitrogen concentration in the alveoli, causing them to collapse. This effect is more pronounced when there is a blockage (such as the tumor in this case) in the airway. Choices A and B are not relevant to the development of atelectasis in this scenario. Choice D may actually improve atelectasis, as a low concentration of oxygen can decrease the risk of absorption atelectasis.

Your Patient Has a Tumor Blocking the Left Mainstem Bronchus