Correct Answer: C

Rationale: Obesity is correct. Excess weight, particularly around the neck, increases the risk of airway obstruction during sleep, making obesity a major risk factor for obstructive sleep apnea. Deep vein thrombosis is not a known risk factor. Being female is incorrect as obstructive sleep apnea is more common in males. Atherosclerosis is not a direct risk factor, though untreated sleep apnea can contribute to cardiovascular issues.

Correct Answer: A

Rationale: Eating six small meals a day limits oxygen demand during digestion and prevents bloating, aiding breathing. Excessive fluids, lying down, and protein intake adjustments are not appropriate.

Correct Answer: C

Rationale: Administering metformin should be questioned. Metformin is contraindicated within 48 hours of receiving contrast dye because of the risk of lactic acidosis, especially in clients with impaired renal function. Having the client lay flat for 4 hours is appropriate to prevent bleeding from the arterial puncture site. Monitoring the site for bleeding and hematoma formation is necessary to detect complications. Administering aspirin is appropriate to prevent clot formation post-procedure.

Correct Answer: A

Rationale: Weight loss is not a common side effect of prednisone. Instead, prednisone often causes weight gain due to fluid retention and increased appetite. Dry mouth, hyperglycemia, and decreased wound healing are known side effects.

Correct Answer: B

Rationale: Pursed-lip breathing slows exhalation, preventing airway collapse and improving oxygenation. High-calorie diets, abdominal breathing in prone position, and avoiding flu shots are not optimal strategies.