Avaliação das perdas sanguíneas intraoperatórias através da análise de compressas cirúrgicas

Abstract

Currently, one of the medical concerns is related to blood loss in the operating theater. This is due to the increasing attention to the patient and to the improvement of health care provided. Already in the surgical setting, it has to do with the preparation of the anesthetist to be given a fast and appropriate response to the patient, and this depends on the surgery type and the type of surgery bleeding. One of the surgeries with higher bleeding in Orthopedics comes from surgery for idiopathic scoliosis. This is the motive of the present work, due to being a very common surgery, quite invasive and to be performed in children and adolescents. In such cases there is a greater concern, so knowledge of blood loss would be a great help in preventing and preparation of these cases. In order to respond to emerging concerns in the hospital setting, particularly to those shown by the Anesthesiology Service of the Porto Hospital Center, E.P.E. - Hospital de Santo António, this work focuses on the search for a practical, reliable and reproducible method for determining blood loss that can be used in the Operating Room. For this purpose, three different methods of data collection were compared: (1) empirical method; (2) gravimetric method; (3) spectrophotometric method. These approaches were applied to two types of swabs, according to their use during surgery: gauze and contrast. By comparing the three methodologies was possible to obtain a prediction model for the three variables under study, Blood Approximate Weight, VisNIR and instrumentalist nurse Opinion, based on the polynomial model. Despite having fallen short of expectations, the average error associated with this model were not very high, which may possibly indicate that a higher number of data could improve the results and average errors associated may decrease. It was also possible to estimate an average value of the volume of blood lost through surgery.

Date of Award	15 Apr 2015
Original language	Portuguese
Awarding Institution	Universidade Católica Portuguesa
Supervisor	Humberto José Silva Machado (Supervisor)