 The primary symptoms of TACO are dyspnea, orthopnea, peripheral edema, and rapid increase of blood pressure.TACO must be suspected when there is respiratory distress with other signs, including pulmonary edema, unanticipated cardiovascular system changes, and evidence of fluid overload (including improvement after diuretic, morphine or nitrate treatment), during or up to 24 hours after transfusion.The International Society of Blood Transfusion (ISBT) working party on hemovigilance in collaboration with the International Haemovigilance Network (IHN) and AABB produced new reporting criteria in 2018.