Estudo do diagnóstico por angiotomografia para tromboembolismo pulmonar em um hospital geral

Abstract

Angiotomography for Pulmonary Thromboembolism (AngioTEP) is an examination with very fast scan time and with many details to follow. There are great difficulties in establishing standardized procedures for performing this exam and variations in the procedures, they often cause the diagnostic quality of the examination to be compromised, causing repetition of exams or new exposures by other imaging procedures, significantly increasing the dose of radiation to which the patient is exposed. A retrospective study of the data collection in the medical records, registry book and AngioTEP exams was carried out in a computed tomography department of a general hospital in Belo Horizonte – MG. The population participating in this research was divided into samples with the same characteristics and appropriate statistical studies were performed. Established the minimum number of participants in this study was for greater reliability of the statistical studies, and it was observed: (1) that the female population is more likely to occur TEP; (2) that the iodinated contrast injection protocol that presented the highest level of contrast in the region of interest and contrast ratio was the 4.5 ml.s-1 protocol for 80 HU programmed in automatic trigger; (3) that with increasing age there was increased contrast ratio; (4) that punctured venous accesses in the left upper limbs present a higher contrast ratio compared to punctured accesses in the right upper limbs; (5) that examinations initiated by the pulmonary apex have a higher contrast ratio compared to those initiated by the pulmonary base; (6) that increased heart rate results in decreased contrast ratio. In this context, the research intends to implement the scientific structure in the elaboration of a protocol for AngioTEP as reference to the computed tomography services and increase the quality control requirements of diagnostic radiology images, improving and standardizing the method of performing the exam, optimizing the results. radiological protection systems, processes and mechanisms for the purpose of optimizing and reducing the radiation dose in patients undergoing an AngioTEP.