Correct Answer: A

Rationale: The correct answer is A: 'Keep a nightlight on in the bathroom.' This safety measure is crucial for older adults to prevent falls by enhancing visibility during nighttime bathroom visits. Choice B is incorrect because setting the room temperature to 68 degrees Fahrenheit may not be universally suitable for all older adults, as individual preferences vary. Choice C is incorrect as placing throw rugs over electrical cords poses a tripping hazard rather than enhancing safety. Choice D is incorrect as using chairs without armrests may not provide adequate support and stability for older adults, increasing the risk of falls.

Correct Answer: D

Rationale: The correct answer is to assist the client to an upright position. When a client is having difficulty breathing, promoting optimal oxygenation is essential. Elevating the head of the bed improves ventilation and lung expansion by reducing pressure on the diaphragm. This position allows the lungs to expand fully, enhancing oxygen exchange. Suctioning the airway may be necessary if there are secretions causing obstruction, but it is not the first intervention in this scenario. Administering a bronchodilator is appropriate for bronchoconstriction but does not address the immediate need for better ventilation. Increasing humidity can be beneficial in certain respiratory conditions, but it is not the initial priority when a client is struggling to breathe.

Correct Answer: A

Rationale: A positive Chvostek's sign is a clinical indication of low calcium levels, known as hypocalcemia. This sign is elicited by tapping the facial nerve anterior to the ear, resulting in facial muscle twitching. The correct laboratory finding associated with a positive Chvostek's sign is decreased calcium. Elevated potassium (Choice B) is not typically associated with Chvostek's sign but can be seen in conditions like renal failure. Increased sodium (Choice C) is not directly related to Chvostek's sign and is more commonly associated with hypernatremia. Low hemoglobin (Choice D) is not the expected laboratory finding in a client with a positive Chvostek's sign; instead, it suggests anemia, which is unrelated to this clinical manifestation.

Correct Answer: D

Rationale: The correct answer is D. Delegating the task of ambulating a client who had a stroke 2 days ago to an AP is appropriate. This task falls within the scope of practice for an AP and can help promote mobility and prevent complications. Choices A, B, and C involve more complex nursing assessments or procedures that require a higher level of training and expertise. Taking orthostatic blood pressure measurements, monitoring a peripheral IV insertion site, and performing a central line dressing change should be tasks performed by licensed nurses to ensure proper assessment and management of the client's condition.

Correct Answer: B

Rationale: The correct instruction for the client using a corticosteroid inhaler to prevent a common side effect is to rinse the mouth with water after using the inhaler. Corticosteroid inhalers can lead to oral thrush, a fungal infection in the mouth. Rinsing the mouth helps reduce the risk of developing oral thrush. Choices A, C, and D are incorrect because using the inhaler only when experiencing symptoms, increasing fluid intake, or avoiding eating/drinking for 30 minutes after use are not directly related to preventing oral thrush, which is the common side effect associated with corticosteroid inhalers.