A nurse is planning care for a client who is to receive one unit of packed RBCs. Within which of the following time spans must the nurse complete the infusion?
2 hr
8 hr
6 hr
4 hr
The Correct Answer is D
A. 2 hr: While some patients may tolerate faster infusion rates, the maximum safe time is 4 hours, and there is no requirement to complete it in 2 hours.
B. 8 hr: Blood cannot be left out for 8 hours due to the increased risk of bacterial growth and contamination.
C. 6 hr: Infusing blood over 6 hours exceeds the safe time limit and poses a risk of bacterial contamination.
D. 4 hr: To reduce the risk of bacterial contamination, a unit of packed RBCs must be transfused within 4 hours of starting the infusion. This time frame ensures that the blood remains safe for the patient while minimizing exposure to room temperature.
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Correct Answer is C
Explanation
A. Red blood cells (RBCs) 5.0 million/mm³ (F 4.2–5.4; M 4.7–6.1): This RBC count is within normal limits and does not indicate a concern related to thrombocytopenia.
B. Hemoglobin 14.5 g/100 mL (F 12–16; M 14–18): Hemoglobin is within normal limits and is not an immediate concern for a patient with ITP, as thrombocytopenia primarily affects platelets, not hemoglobin levels.
C. Platelets 50,000/mm³ (150,000–400,000): A platelet count of 50,000/mm³ is significantly below the normal range and poses a risk for bleeding, which is the primary concern in ITP (immune thrombocytopenic purpura).
D. White blood cells (WBCs) 7,400/mm³ (5,000–10,000): The WBC count is normal and not directly related to thrombocytopenia in ITP, which specifically affects platelets.
Correct Answer is D
Explanation
A. Malformed RBCs: Malformed RBCs are not caused by a transfusion reaction; they are generally a result of bone marrow abnormalities or genetic conditions.
B. A deficiency in vitamin B12: Vitamin B12 deficiency causes megaloblastic anemia, not hemolysis. It is unrelated to transfusion reactions.
C. An abundance of immature RBCs: Immature RBCs, or reticulocytes, can increase as a compensatory response to anemia but are not a direct result of a transfusion reaction. The primary issue is RBC destruction.
D. Destruction of RBCs: A hemolytic reaction occurs when the immune system attacks incompatible red blood cells, leading to their destruction.