NURS 6501: MIDTERM EXAM: Please contact Assignment Samurai for help with NURS 6501: Midterm Exam or any other assignment. Email: assignmentsamurai@gmail.com   A middle-aged adult patient with a recent diagnosis of pneumonia was discharged from the family practice clinic two days ago. He now returns with a high fever, elevated white blood cell count, and severe respiratory distress. The patient complains of confusion and is found to have hypotension. Chest X-ray reveals bilateral infiltrates, and arterial blood gas analysis shows severe hypoxemia. Which of the following lung findings would NOT be expected? Group of answer choices

• Decreased lung compliance
• Significant V/Q imbalance
• Non-cardiogenic pulmonary edema
• Intact alveolar walls

  The correct answer is Intact alveolar walls. Explanation: The patient described presents with severe respiratory distress, fever, hypoxemia, and bilateral infiltrates on chest X-ray, which are signs of acute respiratory distress syndrome (ARDS), a severe form of lung injury that can occur as a complication of pneumonia or other infections. In ARDS, the underlying mechanisms include widespread inflammation, damage to the alveolar-capillary membrane, and increased permeability. This leads to the accumulation of fluid in the alveoli (non-cardiogenic pulmonary edema), impaired gas exchange, and decreased lung compliance. Let's look at each of the findings:

• Decreased lung compliance: In ARDS, the alveolar walls and the interstitial space become stiff due to inflammatory changes, fibrosis, and pulmonary edema. This leads to decreased lung compliance, meaning that the lungs are stiffer and harder to inflate.
• Significant V/Q imbalance: In ARDS, there is often ventilation-perfusion (V/Q) mismatch, where areas of the lung may receive ventilation but not perfusion (or vice versa). This contributes to severe hypoxemia, as blood flow is not efficiently matched with air flow in some parts of the lungs.
• Non-cardiogenic pulmonary edema: This is a hallmark feature of ARDS. It occurs due to increased permeability of the alveolar-capillary membrane, leading to fluid accumulation in the alveoli, which is not caused by heart failure (hence "non-cardiogenic").
• Intact alveolar walls: This is NOT expected in ARDS. In ARDS, the alveolar walls are damaged due to inflammation, which leads to alveolar injury and increased permeability of the alveolar-capillary barrier. This allows fluid, proteins, and inflammatory cells to leak into the alveoli, causing pulmonary edema and impairing gas exchange.

Conclusion: In ARDS, alveolar walls are not intact; they are damaged due to inflammation and injury. Therefore, intact alveolar walls would not be expected in this patient's presentation.