Lectus

A 43-year-old man with a history of HIV presents with a gradual onset of fever, shortness of breath, and a nonproductive cough for the past week. Past medical history is significant for HIV infection diagnosed ten years ago that was never treated with antiretroviral medication. Temperature is 39.0°C (102.2°F), heart rate is 104/min, respiratory rate is 20/min, and blood pressure is 120/80 mm Hg. Physical examination reveals bilateral crepitus over each lobe. No lymphadenopathy is present. A chest radiograph reveals diffuse bilateral interstitial infiltrates. His CD4⁺ T cell count is 105/µL. What is the preferred treatment for the most likely cause of this patient's current pulmonary condition?Deselect Answer

A pediatrician is discussing the benefits of physical activity with parents during a 4-year-old's well-child visit. The child attends preschool and typically spends evenings watching television. Which of the following statements best represents an evidence-based recommendation regarding physical activity for this age group?Deselect Answer

A 25-year-old man is brought to the emergency department after a motor vehicle collision. Physical examination reveals a thin, tall man with diminished breath sounds on the right side of the chest. Chest X-ray shows a collapsed right lung with a large air collection in the pleural space. The patient undergoes needle decompression followed by chest tube placement. As the lung re-expands, which of the following anatomical relationships is most critical in preventing recurrence of atelectasis?Deselect Answer

A 68-year-old man with intermittent claudication due to peripheral arterial disease is prescribed cilostazol. He experiences significant improvement in his walking distance after 8 weeks of treatment. The mechanism by which this medication improves symptoms in peripheral arterial disease involves inhibition of which of the following enzymes?Deselect Answer