1. A 45-year-old man inhaled as much air as possible and then expired with a maximum effort until no more air could be expired. This produced the maximum expiratory flow-volume curve shown in the following diagram. What is the forced vital capacity of this man (in liters)?

Basic Clinical Lab Competencies for Respiratory Care: An Integrated Approach
5th Edition
ISBN:9781285244662
Author:White
Publisher:White
Chapter5: Pulmonary Function Testing
Section: Chapter Questions
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1. A 45-year-old man inhaled as much air as possible and then expired with a maximum effort
until no more air could be expired. This produced the maximum expiratory flow-volume curve
shown in the following diagram. What is the forced vital capacity of this man (in liters)?
500
Expiratory air flow (L/min)
400-
300-
200-
100-
O
A.
1.5
B. 2.5
C. 3.5
D. 4.5
E. 5.5
F. 6.5
Answer: D
5
4
2
3
Lung volume (L)
1
0
Transcribed Image Text:1. A 45-year-old man inhaled as much air as possible and then expired with a maximum effort until no more air could be expired. This produced the maximum expiratory flow-volume curve shown in the following diagram. What is the forced vital capacity of this man (in liters)? 500 Expiratory air flow (L/min) 400- 300- 200- 100- O A. 1.5 B. 2.5 C. 3.5 D. 4.5 E. 5.5 F. 6.5 Answer: D 5 4 2 3 Lung volume (L) 1 0
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