A client with a history of chronic obstructive pulmonary disease (COPD) is undergoing pulmonary function testing. Which of the following instructions should the technician provide in order to determine the client's forced vital capacity (FVC)?
A) "I'll ask you to breathe in as deep as you can, and then blow out as much of that air as possible."
B) "I'd like you to take a deep breath, and then blow out as much air as you can during 1 second."
C) "I want you to breathe as normally as possible, and I'm going to measure how much air goes in and out with each breath."
D) "Breathe normally, and then exhale as much as you possibly can when I tell you."
Ans: A
Feedback:
FVC involves full inspiration to total lung capacity followed by forceful maximal expiration.
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