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 patient in the ICU has a blood drawn and analyzed.  The following data shows:  PB 860 mm Hg              Hb 18.6 gm/dL PaO2 50 mm Hg           SaO2 82%           PvO2 25 mm Hg           SvO2 45% PaCO2 60 mm Hg              What is this patient’s total arterial O2 content?

Which of the following patients are at greatest risk for developing auto-PEEP during mechanical ventilation?  Those with acute lung injury  Those with COPD   Those with congestive heart failure  Those with bilateral pneumonia

Sensory input to the dorsal respiratory neurons from the lungs, airways and peripheral chemoreceptors is provided via which nerves?  Glossopharyngeal  Vagus  Phrenic  Trigeminal

Which of the following is a feature of Myasthenia gravis?  Limited to lower extremities only.  Descending muscle weakness.   Ascending muscle weakness.  Limited to middle of the chest.

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).