Correct Answer: C

Rationale: The correct answer is C because the client should press the PCA pump button when they start to feel pain. This approach helps maintain pain control effectively. Choice A is incorrect because waiting for the pain to become severe before using the PCA pump can lead to inadequate pain management. Choice B is incorrect because only the client should operate the PCA pump to ensure the correct dosage is administered. Choice D is incorrect because the client should press the button as needed when experiencing pain, rather than limiting its use to once per hour.

Correct Answer: B

Rationale: The nurse should wear a dosimeter badge to monitor radiation exposure when caring for a client with a sealed radiation implant.

Correct Answer: D

Rationale: Withholding heparin IV infusion is the priority if there is a risk of complications such as bleeding, which must be evaluated before continuing treatment.

Correct Answer: C

Rationale: A boggy uterus located 2 cm above the umbilicus suggests uterine atony, which is a common cause of postpartum hemorrhage. The initial intervention in this situation is to massage the fundus. Fundal massage helps the uterus contract, promoting hemostasis and preventing excessive bleeding. Taking vital signs or assessing lochia are important actions but are secondary to addressing uterine atony. Administering oxytocin IV bolus is often done after fundal massage to further enhance uterine contractions.

Correct Answer: D

Rationale: The correct answer is to restrict protein intake for a client with chronic renal failure. In renal failure, the kidneys are unable to effectively filter waste products. Excessive protein intake can lead to the accumulation of waste products, increasing the workload on the kidneys. Therefore, restricting protein intake is essential to prevent further kidney damage. Choices A, B, and C are incorrect. Increasing calcium intake is not specifically indicated for chronic renal failure. Increasing potassium intake can be dangerous in renal failure as impaired kidneys may not be able to excrete excess potassium. Increasing protein intake is contraindicated in chronic renal failure as it can worsen kidney function and increase the accumulation of waste products.