Objective To analyze the process of recording transfusion monitoring at a public teaching hospital.Methods A descriptive and retrospective study with a quantitative approach, analyzing the instruments to record transfusion monitoring at a public hospital in a city in the State of Minas Gerais (MG). Data were collected on the correct completion of the instrument, time elapsed from transfusions, records of vital signs, type of blood component more frequently transfused, and hospital unit where transfusion was performed.Results A total of 1,012 records were analyzed, and 53.4% of them had errors in filling in the instruments, 6% of transfusions started after the recommended time, and 9.3% of patients had no vital signs registered.Conclusion Failures were identified in the process of recording transfusion monitoring, and they could result in more adverse events related to the administration of blood components. Planning and implementing strategies to enhance recording and to improve care delivered are challenging.