Maximum expiratory flow rate
Maximum expiratory flow rate
21 L/min
PaO2
63 mm Hg
PaCO2
38 mm Hg
Pulmonary function tests after bronchodilator therapy:
Frequency
15 breaths/min
Alveolar ventilation
4.25 L/min
VC
2.4 L
FRC
4.0 L
TLC
5.2 L
Maximum inspiratory flow rate
252 L/min
Maximum expiratory flow rate
24 L/min
PaO2
63 mm Hg
PaCO2
37 mm Hg
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1.   What is the disorder of this man?Â
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2.   Is this mainly a restrictive or an obstructive disorder? Explain.
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3.   Why is the bronchodilator therapy ineffective for this patient?Â
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4.   What causes the hypoxemia?Â
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5.   Calculate the residual volume (RV) for this person before and after the bronchodilator therapy. RV = TLC - VC.
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6.   What is the cause of this altered RV?Â
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7.   Calculate the tidal volume (TV) for this person before and after the bronchodilator therapy. TV = AV/f + patient body weight. Hint: TV is calculated in mL, so you will need to convert L to mL before completing the equation.
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8.   Is each TV normal or altered?Â
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9.   Calculate the minute ventilation (MV) for this person before and after the bronchodilator therapy. MV = TV × f
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10.  Is each MV normal or altered?Â
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Posted 03 Jul 2017 12:07 AM
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