AplicaÃÃo da citogenÃtica na avaliaÃÃo da radioproteÃÃo de traumatologistas do Recife / Application of cytogenetics for evaluating radioprotection conditions of traumatologists in Recife

AUTOR(ES)
DATA DE PUBLICAÇÃO

2006

RESUMO

Among the activities involving the application of ionizing radiation in medicine, fluoroscopic procedures correspond to the major source of irradiation to doctors. Fluoroscopy consists of X-ray equipment coupled with an image intensifier. This methodology permits a real time visualization of interior of the patientâs body during a surgery. A recent study performed with traumatologists working in Recife (Brazil) revealed that many of them have many doubts about radiation protection rules, such as the importance of using of the film dosimeter as well as lead equivalent apron during their routine work. On the other hand, the quantification of unstable chromosome aberrations (dicentrics, rings and fragments) and micronuclei are methods commonly used in biodosimetry by cytogenetic analyses, specially recommended when the physical dosimetry cannot be performed. In the present research, was design in order to apply such analyses from lymphocytes of peripheral blood samples of those professionals for evaluating the exposure levels which those traumatolgists, due to the lack of observance of radioprotection rules. The results obtained in this research have shown that frequencies of unstable chromosome aberrations of investigated subjects were much higher than for non-exposed individuals. However, the results about analyses of the frequency of micronuclei were in agreement with the values internationally used as for non-exposed subjects. Thus, this study emphasized the importance of individual biomonitoring for better perception of the radioprotection condictions. Moreover, this study indicates that the dose exposure levels of investigated traumatologists are much higher than the limits established by the Brazilian radioprotection agency CNEN

ASSUNTO(S)

citogenÃtica radioproteÃÃo engenharia nuclear dosimetria biolÃgica cytogenetics biology dosimetry radioprotection

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