13 clinical MCQs in Hematopathology. Which blood type is considered the universal donor for red blood cells?
Q1. Which blood type is considered the universal donor for red blood cells?
Answer: Type O
Explanation: Type O negative red blood cells lack both A and B antigens and the Rh factor, making them compatible with all other blood types.
Q2. Which blood type is considered the universal recipient for red blood cells?
Answer: Type AB
Explanation: Type AB positive individuals have both A and B antigens and the Rh factor on their red blood cells, so they do not produce antibodies against A, B, or Rh antigens and can receive red blood cells from any ABO and Rh blood type.
Q3. What is the main function of plasma in blood transfusions?
Answer: To provide clotting factors
Explanation: Plasma contains clotting factors, antibodies, and other proteins essential for hemostasis and immune function, which are crucial when transfusing plasma.
Q4. Which of the following is a contraindication for blood transfusion?
Answer: ABO incompatibility
Explanation: ABO incompatibility between donor and recipient blood can lead to severe and life-threatening hemolytic reactions, making it an absolute contraindication for transfusion.
Q5. The term "crossmatch" in blood transfusion refers to:
Answer: Checking the compatibility between donor and recipient blood
Explanation: A crossmatch is a procedure performed in blood banking to determine if a potential recipient's blood is compatible with a donor's blood before it is transfused.
Q6. Which of the following is a possible complication of blood transfusion?
Answer: All of the above
Explanation: Hyperkalemia can occur due to the release of potassium from stored red blood cells. Graft versus host disease (GVHD) is a rare but serious complication where transfused lymphocytes attack the recipient's tissues. Hemolytic reactions are immune responses to incompatible blood.
Q7. Which antigen is present on the surface of red blood cells in Type B blood?
Answer: B antigen
Explanation: Type B blood has the B antigen on the surface of its red blood cells.
Q8. What is the most important factor in determining blood compatibility between a donor and recipient?
Answer: ABO group
Explanation: The ABO blood group system is the most critical factor for compatibility because individuals naturally produce antibodies against the A or B antigens they lack.
Q9. Which of the following is the primary concern in transfusing Rh-negative blood to an Rh-positive patient?
Answer: Hemolytic reaction
Explanation: While Rh-positive patients can generally receive Rh-negative blood without immediate issues, an Rh-negative patient who receives Rh-positive blood can develop antibodies against the Rh factor, leading to a hemolytic reaction in future transfusions or during pregnancy.
Q10. What is the role of the Rh factor in blood transfusion?
Answer: Affects the likelihood of hemolytic reactions in pregnancy or transfusion
Explanation: The Rh factor (presence or absence of the D antigen) is important because individuals can develop antibodies against it, leading to hemolytic disease of the newborn or hemolytic transfusion reactions.
Q11. Which of the following components is typically transfused for patients with low platelet counts?
Answer: Platelet concentrate
Explanation: Platelet concentrate is the component of blood used to increase the platelet count in patients with thrombocytopenia (low platelet count).
Q12. Which of the following should be monitored during a blood transfusion to detect possible complications?
Answer: All of the above
Explanation: Monitoring vital signs such as heart rate, blood pressure, temperature, and respiratory rate is crucial during a blood transfusion to quickly identify and manage potential adverse reactions.
Q13. Which of the following is a sign of an acute hemolytic transfusion reaction?
Answer: All of the above
Explanation: Acute hemolytic transfusion reactions can manifest with a range of symptoms including fever, chills, hypotension (low blood pressure), back pain, and dark or red-colored urine (hemoglobinuria).