Correct Answer: B

Rationale: The correct answer is the upper outer thigh. In thin, elderly clients, the upper outer thigh is a recommended site for subcutaneous injections due to the presence of adequate subcutaneous tissue and muscle mass. The dorsal aspect of the upper arm may not provide enough subcutaneous tissue for proper absorption of the medication. The lower abdomen is not ideal for thin individuals as it may lead to injection into muscle rather than subcutaneous tissue. The lateral aspect of the upper arm is also not a commonly recommended site for subcutaneous injections.

Correct Answer: A

Rationale: The correct answer is A: 'Take the medication in the morning before eating.' Levothyroxine should be taken on an empty stomach in the morning for optimal absorption. Choice B is incorrect because while taking medication with water is generally recommended, levothyroxine specifically needs to be taken on an empty stomach. Choice C is incorrect as taking levothyroxine with food can interfere with its absorption. Choice D is incorrect as levothyroxine should be taken regularly as prescribed, not only when symptoms worsen.

Correct Answer: D

Rationale: Controlling blood pressure is critical in managing peripheral vascular disease, as elevated pressure can exacerbate vascular damage and complications. While foot care, shoe fit, and exercise are important, lowering blood pressure is a primary goal. Proper blood pressure management helps in preventing further damage to the blood vessels and reduces the risk of complications associated with peripheral vascular disease, making it the most crucial outcome to include in the plan of care for this client.

Correct Answer: D

Rationale: A serum calcium level of 7.5 mg/dL is indicative of hypocalcemia, a common complication in clients with chronic kidney disease due to impaired calcium absorption and metabolism. Hypercalcemia (Choice A) is the opposite of the condition presented in the question and is characterized by elevated serum calcium levels. Hyperkalemia (Choice B) is an increased potassium level, not related to the client's serum calcium level. Hyponatremia (Choice C) is a decreased sodium level and is also not related to the client's serum calcium level.

Correct Answer: B

Rationale: The correct answer is to assess the client's endotracheal tube for obstruction. When a client on mechanical ventilation experiences high-pressure alarms, the first action should be to check for any potential obstructions in the airway, which can trigger the alarms. Checking the oxygen saturation (Choice A) is important but not the priority when dealing with high-pressure alarms. Repositioning the client (Choice C) may be necessary later but should not be the initial action. Suctioning the client's airway (Choice D) should only be done after assessing for and addressing any obstructions in the endotracheal tube.