What is the normal P(A–a)O2 range while breathing room air? 25 mm Hg to 50 mm Hg 10 mm Hg to 25 mm Hg less than 10 mm Hg greater than 25 mm Hg

Which of the following can cause hypoxemia? (Multiple Answers)  V/Q mismatch  Diffusion impairment  Alveolar hypoventilation  Intrapulmonary shunting

Which of the following measures should be used in assessing the adequacy of a patient’s alveolar ventilation? (Multiple Answers) 1. PaO2 2. Arterial pH 3. PaCO2 4. HCO3-

A 34-year-old male admitted to the emergency department with lung contusions and presents with the following ABG results breathing FIO2 .40: pH            7.50 PaCO2     28 mm Hg PaO2       45 mm Hg HCO3‾    23 mEq/L Which of the following best describes this patient’s condition?

Which of the following strategies can help reduce auto-PEEP in mechanically ventilated patients with obstructive lung disease? (Multiple Answers)1.  Use high inspiratory flows (70 to 100 L/min).2.  Apply extrinsic PEEP.3.  Use VT values (12 to 15 ml/kg).4.  Use high respiratory rates (>25/min).

All of the following would tend to cause hypercapnic respiratory failure except:  COPD  drug overdose/sedation  muscular dystrophy  smoke inhalation  

Which of the following adverse reactions are commonly seen with pulmonary function testing?   hemoptysis  cough  chest pain  syncope

Using the given data, what is the alveolar partial pressure of oxygen for the following patient? FIO2            .28 PB             752 mm Hg  pH            7.38 PaCO2      43 mm Hg PaO2        88 mm Hg

A “white” chest radiograph presentation is most often associated with hypoxemia due to ventilation/perfusion mismatch. 

A patient develops acute hypercapnic respiratory failure due to muscle fatigue. Which of the following modes of ventilatory support would you consider for this patient? (Multiple Answers)  Assist-control ventilation with adequate backup rate.  Continuous positive airway pressure.  Intermittent mandatory ventilation with adequate backup rate.  Airway pressure release ventilation.