Final answer:
Anaphylaxis during a blood transfusion can be caused by a type II hypersensitivity reaction, specifically an HTR. Incompatible blood types can trigger this reaction, causing symptoms such as fever, chills, itching, hives, difficulty breathing, hemoglobin in the urine, and low blood pressure. Severe cases can lead to shock, multi-organ failure, and death.
Step-by-step explanation:
The patient in question is experiencing anaphylaxis during a blood transfusion. This can occur due to a type II hypersensitivity reaction, specifically an HTR (hemolytic transfusion reaction), which is caused by incompatible blood types. When a person receives a transfusion of a blood type that is not compatible with their own, the recipient's antibodies bind to and destroy the transfused red blood cells, leading to symptoms such as fever, chills, itching, hives, difficulty breathing, hemoglobin in the urine, and low blood pressure. In severe cases, this can result in shock, multi-organ failure, and death.