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alina1380 [7]
3 years ago
14

A 17-year-old student has experienced reversible, periodic attacks of chest tightness with coughing, wheezing, and hyperpnea. Sh

e states that expiration is more difficult than inspiration. She is most comfortable sitting forward with arms leaning on some support. X-rays revealed mild overinflation of the chest. Results from laboratory and pulmonary function tests are as follows:
Frequency 20 breaths/min
Vital capacity (VC) 2.9 L
FEV1.0 1.4 L
FEV1.0/FVC 56%
Functional residual capacity (FRC) 3.89 L
Total lung capacity (TLC) 6.82 L
PaO2 70 mm Hg
PaCO2 26 mm Hg
Pulse 108 b/min
BP 120/76 mm Hg
Intermittent use of a bronchial smooth muscle dilator (1:1000 epinephrine by nebulizer) for several days caused marked improvement, resulting in the following laboratory and pulmonary function tests:

VC 4.15 L
FEV1.0 3.1 L
FEV1.0/FVC >75%
FRC 3.7 L
TLC 5.96L
PaO2 89 mm Hg
PaCO2 38 mm Hg
Pulse 129 b/min
BP 122/78 mm Hg


Pick 3 Questions to Discuss!

1. What is the disorder of this 17-year-old student?

2. Is this primarily a restrictive or an obstructive disorder? Why?

3. Why is expiration more difficult than inspiration in this person?
Biology
1 answer:
maksim [4K]3 years ago
8 0
573737537282637382257283
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