Correct Answer: A

Rationale: Postoperative pain is commonly caused by the surgical incision and muscle tension. The correct answer is A. Surgical incisions cause tissue damage, triggering pain responses. Muscle tension can result from factors like positioning during surgery or guarding due to pain. Managing postoperative pain caused by surgical incisions and muscle tension involves the use of analgesics to alleviate discomfort. Choices B, C, and D are incorrect. Nerve damage and wound complications may also cause pain but are not as common as surgical incisions and muscle tension. Hypotension and respiratory issues are not direct causes of postoperative pain. Infection at the incision site can lead to pain, but it is a specific complication rather than a common cause of postoperative pain.

Correct Answer: B

Rationale: The correct lifestyle change that should be emphasized for a client with hypertension is to reduce caffeine and sodium intake. Caffeine can temporarily raise blood pressure, and high sodium intake is linked to increased blood pressure levels. Therefore, reducing these two components can help manage blood pressure in individuals with hypertension. Choices A, C, and D are incorrect because increasing intake of dairy products, consuming carbohydrate-rich meals, and limiting intake of leafy green vegetables do not specifically address the factors that contribute to high blood pressure in hypertension.

Correct Answer: D

Rationale: The correct answer is D because clients should press the button on the PCA pump when they feel pain to receive controlled doses of medication. Option A is incorrect as the client should be the one to self-administer the medication through the PCA pump. Option B is incorrect as the primary purpose of the PCA pump is to manage pain, not to keep the client comfortable. Option C is incorrect because the client should not adjust the dosage themselves; instead, they should communicate any pain concerns to the healthcare provider.

Correct Answer: B

Rationale: The correct answer is B: Assess the wound and reposition the patient frequently. When caring for a patient with a pressure ulcer, it is crucial for the nurse to assess the wound regularly to monitor its progress and prevent complications. Additionally, repositioning the patient frequently helps to relieve pressure on the affected area, prevent further damage, and promote healing. Choice A is incorrect because while cleaning the wound is important, applying a protective dressing is not the primary role of the nurse in managing a pressure ulcer. Choice C is incorrect as applying pressure to the ulcer is harmful, and monitoring for signs of healing should not involve applying pressure. Choice D is incorrect as providing pain relief and administering antibiotics may be necessary but are not the primary interventions for managing a pressure ulcer.

Correct Answer: D

Rationale: The correct answer is D because it accurately transcribes the prescription by specifying the medication (Potassium chloride), the dose (20 mEq), the route (PO for by mouth), and the frequency (every morning). Choice A is incorrect as it specifies a lower dose compared to the correct prescription. Choice B is incorrect due to an inaccurate dose. Choice C is incorrect as it lacks specificity regarding the type of potassium prescribed and the dose.