The main cause of restrictive hypoventilation is ()
A. Dysfunction of respiratory muscles
B. Decrease in the surface area of alveolar membrane, and increase in the thickness of alveolar membrane
C. Increase in the thickness and stenosis of airway wall
D. Ventilation-perfusion imbalance
E. The external airway obstruction
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The feature of blood gas alteration in respiratory failure resulting from narcotic overdose is ()
A. Increased PaCO2
B. The decrease of PaO2 is more prominent than the increase of PaCO2
C. The decrease of PaO2is accompanied by a proportional increase of PaCO2
D. The increase of PaCO2 is more prominent than the decrease of PaO2
E. Decreased PaO2
Which of the following situations could be caused by glottic baralysis? ( )
A. Inspiratory dyspnea
B. Expiratory dyspnea
C. No dyspnea
D. Paroxysmal dyspnea
E. Both inspiratory dyspnea and expiratory dyspnea
The feature of blood gas alterations caused by ventilation and perfusion imbalance is ()
A. Decreased PaO2 , and increased PaCO2
B. Decreased PaO2 , and decreased PaCO2
C. Decreased PaO2 ,and proportionally increased PaCO2
Decreased PaO2 with a normal or decreased, or increased PaCO2,
E. Both PaO2 and PaCO2 may be not definitive
Oxygen therapy is not effective to the respiratory failure caused by ()
A. Impaired ventilation
B. Diffusion impairment
C. Lung arterio-venous fistula
Dead space like ventilation
E. Functional shunt
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