A patient is receiving a blood transfusion and develops chills, a headache, and low back pain. What is the nurse's priority action?

Correct Answer: B

Rationale: The correct answer is to stop the transfusion (Choice B). The symptoms described - chills, headache, and low back pain - are indicative of a transfusion reaction. The priority action is to immediately stop the transfusion to prevent further complications such as more severe reactions like hemolytic reactions or anaphylaxis. Administering acetaminophen (Choice A) may help with symptoms but does not address the underlying cause. Slowing the transfusion rate (Choice C) may not be sufficient if a serious transfusion reaction is occurring. Administering antihistamines (Choice D) is not the priority in this situation; stopping the transfusion takes precedence to ensure patient safety.

Correct Answer: B

Rationale: The correct answer is to administer nitroglycerin. Nitroglycerin is the priority intervention for a patient presenting with chest pain as it helps dilate blood vessels, reduce chest pain, and improve oxygen supply to the heart. Obtaining a detailed medical history, conducting an ECG, or administering morphine sulfate are important steps in the assessment and treatment process but are secondary to the immediate need to address chest pain and potential cardiac ischemia.

Correct Answer: D

Rationale: Elevated BUN levels are a characteristic finding in dehydration due to reduced kidney perfusion and increased reabsorption of urea. Hemoglobin levels might be elevated in conditions like polycythemia vera, not directly related to dehydration. A low sodium level could be seen in conditions like hyponatremia. A high white blood cell count is more indicative of infection or inflammation rather than dehydration.

Correct Answer: C

Rationale: The correct answer is C: 'Increases cough production.' Guaifenesin is an expectorant that works by increasing cough production to help clear secretions from the airways. Option A is incorrect because guaifenesin does not decrease mucus production but rather helps to make the mucus easier to cough up. Option B is incorrect as guaifenesin does not reduce nasal congestion. Option D is incorrect because guaifenesin does not have any effect on reducing fever.

Correct Answer: B

Rationale: The correct answer is to 'Report a rash.' Metronidazole can cause severe adverse reactions like Stevens-Johnson syndrome, a life-threatening rash. It is crucial to educate the patient to report any rash immediately to prevent serious complications. Choices A, C, and D are incorrect because while they may be relevant to consider during metronidazole therapy, they are not the priority teaching point. Headaches can occur but are not as serious as a rash; avoiding sunlight is more related to doxycycline, not metronidazole; and taking with meals is a general instruction for some medications but not the priority teaching point for metronidazole.