Correct Answer: D

Rationale: The patient's symptoms, back pain, and difficulty breathing after the transfusion indicate a possible acute hemolytic reaction, a severe transfusion reaction. The priority action in this situation is to discontinue the transfusion immediately to prevent further complications. Infusing normal saline helps maintain the patient's intravascular volume and prevent renal damage. Administering oxygen or obtaining a urine specimen is not the most urgent action and could delay essential treatment. Notifying the healthcare provider is important but should come after ensuring the patient's safety by stopping the blood transfusion.

Correct Answer: B

Rationale: The correct answer is B. Unlicensed assistive personnel (UAP) can obtain the temperature, blood pressure, and pulse before a transfusion as their education includes measurement of vital signs. UAP would then report the vital signs to the registered nurse (RN). Option A is typically a nursing responsibility to ensure patient safety and avoid errors in patient identification. Option C involves cross-checking important details and ensuring accuracy, which is usually performed by nursing staff to prevent errors. Option D requires monitoring for potential adverse reactions during the transfusion, which is a nursing responsibility due to the need for assessment and intervention in case of complications.

Correct Answer: C

Rationale: The correct answer is C: 'Avoid exposure to crowds when possible.' This instruction is crucial in discharge teaching for a patient admitted with a sickle cell crisis because exposure to crowds increases the risk of infection, which is the most common cause of sickle cell crisis. Choices A, B, and D are incorrect. Taking a daily multivitamin with iron (Choice A) may be beneficial for some individuals but is not specifically related to managing sickle cell crisis. Limiting fluids to 2 to 3 quarts per day (Choice B) is not typically recommended for patients with sickle cell crisis, as adequate hydration is important. Drinking only two caffeinated beverages daily (Choice D) is not a priority instruction in managing sickle cell crisis.

Correct Answer: B

Rationale: The correct answer is to evaluate the effectiveness of opioid analgesics. In sickle cell crisis, pain is the most common symptom and is usually managed with large doses of continuous opioids. Monitoring fluid intake (Choice A) is important, but limiting fluids may not be necessary. Encouraging ambulation (Choice C) is generally good but may not be the priority during a sickle cell crisis. Educating the patient about nutrition (Choice D) is important for overall health but may not be the immediate focus during a crisis.

Correct Answer: B

Rationale: The correct answer is B. In chronic anemia, the hematocrit (Hct) value is a crucial indicator of the proportion of red blood cells in the blood. A hematocrit value of 38% indicates a lower than normal level of red blood cells, which aligns with the patient's symptoms of fatigue and palpitations. Choices A, C, and D are incorrect because a low RBC count, normal RBC indices, and a hemoglobin level of 8.6 g/dL do not specifically address the decreased red blood cell mass associated with chronic anemia.