What two samples are typically collected if a transfusion reaction is suspected?

When a transfusion reaction is suspected, it is crucial to collect both urine and blood samples for proper assessment and analysis. The blood sample is essential for determining the cause of the reaction, such as identifying antibodies or antigens involved in the transfusion. This can help in diagnosing conditions like hemolytic reactions, which are caused by incompatibility.

Collecting urine is also important because it can provide valuable information about the kidney's response to the reaction. In cases of hemolysis, the presence of hemoglobinuria can be detected, indicating breakdown of red blood cells and potential kidney damage. Thus, these two specimens together help healthcare providers understand and manage the reaction effectively, ensuring appropriate treatment and safety for the patient.

Other options do not involve the relevant specimens needed in these situations. Saliva, tissue, or fecal samples are typically not utilized in assessing transfusion reactions, as they do not provide the necessary insights related to the blood's immunological response or renal involvement.