Changes in vital signs that may occur during or after a blood transfusion for reasons other than a transfusion reaction:
(1) rise in temperature, from hypothermic to normothermic
(2) rise in temperature associated with surgery or medication
(3) rise in temperature associated with concurrent infection
(4) drop in blood pressure associated with resting after an exertion (especially in an elderly patient who is an outpatient)
(5) change in blood pressure associated with medication, bleeding or clinical condition
(6) difference in vital signs associated with a difference in operators (multiple nurses, different shifts) or devices
Diagnosis:
(1) absence of other signs of a significant reaction
(2) exclusion of a significant transfusion reaction
