Correct Answer: B

Rationale: The correct action for the nurse to take is to assess the client's lung sounds before administering IV fluids. This is crucial to identify any signs of fluid overload, such as crackles or wheezes. Administering the solution slowly over 24 hours (choice A) is not appropriate for an IV bolus, which is a rapid infusion. Changing the IV tubing every 12 hours (choice C) is a standard practice for preventing infection but is not directly related to administering an IV bolus. Flushing the IV line with heparin every 4 hours (choice D) is a maintenance practice to prevent clot formation in the line, not specifically related to administering an IV bolus.

Correct Answer: C

Rationale: The correct answer is C. When a client understands the teaching about iron supplements, they should know that black, tarry stools are a normal side effect. This indicates that the medication is being absorbed and working effectively. Choices A and B are incorrect because iron supplements should not be taken with milk or orange juice, as these can interfere with the absorption of iron. Choice D is also incorrect because iron supplements are usually best absorbed on an empty stomach, so taking them before bedtime may not be ideal.

Correct Answer: B

Rationale: The correct intervention that should be included in the care plan for a client about to receive low-dose brachytherapy via a vaginal implant is to insert an indwelling urinary catheter. This is crucial to prevent bladder distention during brachytherapy, ensuring the treatment's effectiveness and the client's comfort. Removing vaginal packing (Choice A) may not be necessary or appropriate in this situation. Ambulating the client four times daily (Choice C) is a good nursing intervention for general patient care but is not specifically related to brachytherapy via a vaginal implant. Keeping the client NPO until therapy is complete (Choice D) is not necessary unless specifically indicated due to the treatment's nature or the client's condition.

Correct Answer: A

Rationale: A heart rate of 78/min is within the normal range; however, postoperative patients require close monitoring for any signs of complications. While the heart rate is normal, other critical findings such as increased pain, excessive bleeding, or other concerning symptoms may need immediate attention. Choices B, C, and D all indicate normal postoperative vital signs and oxygen saturation levels, which do not raise immediate concerns requiring reporting to the provider.

Correct Answer: D

Rationale: The correct answer is D: Aspartate aminotransferase (AST) 60 units/L. An elevated AST level indicates liver damage, which can be a side effect of methotrexate and should be reported. Elevated white blood cell count (choice A), platelet count (choice B), or normal hemoglobin level (choice C) are not directly related to methotrexate therapy for rheumatoid arthritis.