bachelorThesis
Avaliação da dose equivalente nas mãos de profissionais que acompanham exames pediátricos de uretrocistografia miccional
Fecha
2016-11-11Registro en:
SEVERO, Francieli Zeferino. Avaliação da dose equivalente nas mãos de profissionais que acompanham exames pediátricos de uretrocistografia miccional. 2016. 51 f. Trabalho de Conclusão de Curso (Graduação em Tecnologia em Radiologia) - Universidade Tecnológica Federal do Paraná, Curitiba, 2016.
Autor
Severo, Francieli Zeferino
Resumen
Procedures employing fluoroscopy as a tool to the diagnosis are associated with high dose exposure rates, requiring occupationally exposed individuals to apply radiological protection techniques effectively, especially when they involve the professional permanence inside the examination room, whether to immobilize the patient or to inject the contrast agent. This applies to Voiding Cystourethrography (VCUG), a contrasted examination in which the hands of the professionals rest close to the primary radiation beam during the procedure, factor that requires attention, in order to minimize the risks associated with this practice. The aim of the present work was to estimate the equivalent dose on the hands of the professionals accompanying the examinations of pediatric VCUG, in order to confront those results with the standards and other published studies, to ensure that occupationally exposed individuals do not exceed the acceptable dose levels. The study was conducted in a Pediatric Hospital located in Curitiba city, where humanoid phantoms were used to simulate the pediatric patients. The dosimetric assessment was performed with the assistance of a parallel plate ionization chamber positioned where usually the hands of the professionals rest during the examination. As a result, the following obtained values of equivalent dose delivered to both professionals accompanying the examination were: 730 mSv and 210 mSv, respective values for the professional resting close and far from the primary radiation beam. The dose received by the professional positioned 15 cm from the primary beam exceeds the annual 500 mSv recommended dose limit value from ICRP-103 and CNEN standard 3.01, which represents a risk to the occupationally exposed individual. With a view to minimizing these risks, we suggest the application of radiological protection measures, such as the wearing of lead gloves, an increase in the distance between the patient and the professional, reducing exposure time and realization of refresher courses that improve the occupationally exposed individuals knowledge of radiological protection techniques.