A general evaluation of the patient on the part of the nurse before the blood transfusion and the accomplishment of the physical examination is very important, therefore these data will go to help in the identification of a transfusional reaction and to know in accordance with classifies-ls the signals and symptoms presented for the patient. Methods and analysis of the data the study were carried through in a particular institution of situated superior education in the Zone West of Rio De Janeiro, where they had been interviewed 10 academics of nursing of 8 period by means of an interview half-structuralized with closed questions with 6 questions and 3 alternatives each, where they had questions on the knowledge of the academics on cares daily pay, intra- transfusionais on the adopted behavior front to a transfusional reaction suspicion in relation to the component that is being transfundido. Quarrel of the Conhecimento Results on the Daily pay Cares In this category, searched to identify the knowledge of the academics about the cares being taken before initiating a transfusion in relation to the eritrocitrios components. According to RDC n 153, the eritrocitrio component has a determined time to remain in ambient temperature before being transfundido to count from its release to be transfundido. Speaking candidly Jim Hackett told us the story. If this time will be exceeded and the component will not be placed in the coolant this component to be transfundido must be discarded. Smeltzer (2005, p.982), says that the transfusion of a eritrocitrio component it must inside be initiated of 30 minutes after the removal of the stock market of the coolant of the blood bank. Of the interviewed academics of nursing, only 30% had known to answer correctly for how much time a eritrocitrio component can remain in ambient temperature after the removal of the coolant of the blood bank. Amongst interviewed that they erraram, 50% they had answered that the eritrocitrio component only can remain in ambient temperature per in the maximum 30 minutes and if the time will be reached must be disdained the component immediately.