The patient has been home from the hospital for 10 days.On the last day of his hospitalization,he received 2 units of packed red blood cells (RBCs) .This morning,he noticed that his skin had a yellow tint to it and his temperature was elevated.Which reaction might this patient be experiencing?

A) Delayed hemolytic transfusion reaction
B) Acute hemolytic transfusion reaction
C) Nonhemolytic febrile reaction
D) Severe allergic transfusion reaction

Symptoms of a delayed hemolytic reaction usually begin 2 to 14 days after the transfusion and include unexplained fever,unexplained decrease in Hgb/Hct,increased bilirubin levels,and jaundice.Symptoms of an acute hemolytic reaction usually begin within 15 minutes of transfusion initiation and include severe pain in the kidney area and chest,increased temperature (up to 105°F),increased heart rate,and increased sensation of heat and pain along the vein receiving blood,as well as chills,low back pain,headache,nausea,chest or back pain,chest tightness,dyspnea,bronchospasm,anxiety,hypotension,vascular collapse,disseminated intravascular coagulation,and possibly death.Symptoms of a nonhemolytic febrile reaction begin between 30 minutes after initiation and 6 hours after completion of transfusion and include fever greater than 1°C above baseline,flushing,chills,headache,and muscle pain;they occur most frequently in immunosuppressed patients.Symptoms of an acute severe allergic reaction usually begin within 5 to 15 minutes of initiation of transfusion and include coughing,nausea,vomiting,respiratory distress,wheezing,hypotension,loss of consciousness,and possible cardiac arrest.