Answer: the correct answer is 3. "If a transfusion reaction occurs, it will be important to collect a fresh urine specimen to check for hemolyzed RBCs."
Explanation:
The nurse should ask the patient to void or empty the urinary catheter and discard urine prior to starting a blood transfusion. In the event of an acute hemolytic transfusion reaction, a fresh urine specimen should be collected and sent to the laboratory to analyze for hemolyzed RBCs. An acute hemolytic transfusion reaction is a life-threatening reaction in which the host's antibodies rapidly destroy the transfused RBCs and is generally related to incompatibility. Early signs of a hemolytic reaction include red urine, fever, and hypotension; late signs include disseminated intravascular coagulation and hypovolemic shock. The transfusion should be stopped immediately if any sign of transfusion reaction happens.