Correct Answer: A

Rationale: Ensuring the blood is compatible with the client's blood type is critical in preventing an acute hemolytic reaction, as incompatible blood transfusions can cause serious, potentially life-threatening reactions. Administering the transfusion rapidly can increase the risk of complications and does not prevent hemolytic reactions; transfusions should be given at a safe rate based on the client's condition. Using a blood warmer is not a standard intervention to prevent hemolytic reactions; it's typically used in specific cases such as massive transfusions or hypothermia, but it does not address compatibility. Administering prophylactic antihistamines is not a recommended practice to prevent hemolytic reactions; it is more relevant for preventing allergic reactions associated with transfusions.

Correct Answer: B

Rationale: Dehydration is a significant trigger for sickle cell crises, as it can lead to increased blood viscosity and sickling of red blood cells. Over-hydration is not a trigger for a sickle cell crisis; in fact, adequate hydration helps prevent sickling of the cells. Non-steroidal anti-inflammatory drugs (NSAIDs) are often used to manage pain associated with sickle cell crises, but they do not trigger a crisis. Vaccinations are important for preventing infections in individuals with sickle cell anemia but are not associated with triggering a sickle cell crisis.

Correct Answer: C

Rationale: Chronic bloody diarrhea is a significant symptom of ulcerative colitis and leads to iron loss and depletion, contributing to the development of anemia due to the loss of blood and iron. Dietary iron restrictions may affect iron intake, but they are not a direct symptom of ulcerative colitis that contributes to anemia. Intestinal parasites can cause anemia but are not a common complication associated with ulcerative colitis. Intestinal malabsorption syndrome can lead to anemia; however, it is not a primary symptom of ulcerative colitis itself.

Correct Answer: B,C,D,E,F

Rationale: Verifying the client's name and blood type with a second nurse is a critical safety measure to prevent transfusion reactions. Infusing the unit of blood within 4 hours is essential to reduce the risk of bacterial growth. Obtaining baseline vital signs prior to starting the transfusion is important to assess the client's condition. Continuously monitoring the client during the first 15 minutes is vital for detecting any signs of a transfusion reaction. Inserting an 18-gauge intravenous catheter is recommended for blood transfusions. Hanging a bag of D5%NS is incorrect; only normal saline should be used. A 22-gauge catheter is acceptable but not preferred.

Correct Answer: A,C,D,E

Rationale: Hemoglobin level is a key component of the CBC, reflecting the oxygen-carrying capacity of the blood. White blood cell count is included in the CBC and is important for assessing the immune response. Platelet count is also part of the CBC and is essential for evaluating clotting function. Red blood cell count is included in the CBC and is crucial for assessing overall blood health and anemia status. Blood glucose level is not part of the CBC; it is typically measured separately in metabolic panels or glucose tests.