Which oxygen delivery method provides the highest concentration?

Correct Answer: C

Rationale: A non-rebreather mask delivers up to 100% oxygen by preventing rebreathing exhaled air, exceeding nasal cannula (24-44%), simple mask (40-60%), or Venturi mask (24-50%).

Correct Answer: A

Rationale: ARDS causes alveolar collapse and fluid accumulation, impairing gas exchange and leading to hypoxemia, not high cardiac output, bronchodilation, or increased hemoglobin.

Correct Answer: A

Rationale: Dehydration increases blood viscosity, promoting clot formation and pulmonary embolism risk, more than hypotension, bradycardia, or fever.

Correct Answer: C

Rationale: This patient is at high risk for hospital-acquired pneumonia. After a splenectomy (removal of the spleen), patients may experience pain and discomfort, which can make them reluctant to perform necessary activities like coughing and deep breathing. These activities are crucial for preventing lung complications such as atelectasis and pneumonia.

Correct Answer: A

Rationale: Oatmeal is a good source of fiber, which can help manage blood sugar levels. Whole-grain toast provides complex carbohydrates and fiber, and using an artificial sweetener in oatmeal reduces sugar intake. Tea is a good beverage choice as it does not contain sugar or calories if not sweetened.