Correct Answer: B

Rationale: The correct instruction that the nurse should include for a client postoperative following cataract surgery is to avoid bending at the waist. Bending at the waist can increase intraocular pressure, which is not recommended after cataract surgery. Choices A, C, and D are incorrect because lying flat for 24 hours after surgery may not be necessary, wearing an eye patch at night for a week is not a standard postoperative instruction for cataract surgery, and sleeping on the affected side may not necessarily reduce discomfort and can increase pressure on the eye.

Correct Answer: B

Rationale: The correct instruction is to rinse the mouth after each use of a corticosteroid inhaler to prevent oral candidiasis (thrush). Choice A is incorrect because corticosteroid inhalers are usually used on a regular schedule to control asthma symptoms, not just for acute symptoms. Choice C is incorrect as corticosteroid inhalers are typically used for long-term management, not just during asthma attacks. Choice D is incorrect as administering a bronchodilator after using a corticosteroid is not a standard practice and is not necessary for the effectiveness of the corticosteroid inhaler.

Correct Answer: D

Rationale: The correct answer is to elevate the client's affected extremity when in bed. Elevating the extremity helps to reduce swelling and improve venous return in clients with DVT. Limiting fluid intake to 1500 mL per day (Choice A) is not directly related to managing DVT. Massaging the affected extremity (Choice B) can dislodge a clot and lead to serious complications. Applying cold packs (Choice C) can vasoconstrict blood vessels, potentially worsening the condition by reducing blood flow.

Correct Answer: A

Rationale: The correct answer is to monitor BUN (Blood Urea Nitrogen) and creatinine levels in a patient with chronic kidney disease. These tests provide crucial information about renal function. Checking blood glucose levels (Choice B) is important for monitoring diabetes, not renal function. Monitoring hemoglobin and hematocrit levels (Choice C) helps assess anemia, not specifically renal function. Monitoring liver enzymes (Choice D) is relevant for assessing liver function, not renal function.

Correct Answer: A

Rationale: In patients with heart failure, monitoring daily weight is the most accurate method for assessing fluid balance. Weight gain can indicate fluid retention, a common issue in heart failure patients. Monitoring input and output (B) is essential but may not always accurately reflect fluid balance. Checking for edema (C) is important as it can indicate fluid accumulation, but daily weight monitoring is more precise. Monitoring blood pressure (D) is important in heart failure management but does not directly assess fluid balance.