Navegando por Palavras-chave "Quimioembolização terapêutica"

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    Estudo das doses recebidas por pacientes e equipe médica nas embolizações vasculares e neurológicas
    (Universidade Federal de São Paulo (UNIFESP), 2016-06-30) Castilho, Alvaro Adolfo Vilas Boas [UNIFESP]; Medeiros, Regina Bitelli [UNIFESP]; http://lattes.cnpq.br/2665030032263086; http://lattes.cnpq.br/5075107232526984; Universidade Federal de São Paulo (UNIFESP)
    Objective: To estimate doses during occupational exposure in embolization procedures, as well as maximum doses on patients skin in neurological, hepatic and uterine embolization procedures. Methods: There were evaluated ninety-two procedures in which thirty patients underwent cerebral embolization, other fifty to chemoembolization and twelve to embolization of uterine myoma. In twenty-eight of them radiochromic films were used, around head, called group 1 and in the abdomen / pelvis region, called group 2, in order to estimate the maximum dose on skin (PSD). The total time of exposure values, number of images and values of Kerma-area products (DAP in Gy.cm²) for fluoroscopy and cineradiography (cine) were registered for each procedure. Occupational doses on physicians team were measured in the left temporal region, anterior and posterior regions of chest and left ankle using active dosimeters. A reference dosimeter was fixed in the center of the arch C. The doses on nursing team were evaluated on the anterior and posterior regions of chest. Results: The 3rd quartile values (median) for KAP, considering the patients who underwent embolization of groups 1 and 2 were 408.1 (235.3) Gy.cm² and 584.4 (449.4) Gy.cm2 for total dose. The total exposure time was 36.1 (24.8) minutes for group 1 and 34.5 (32.5) minutes for group 2, and the number of images acquired in cine mode ranged from 87 to 1179 between the groups. The 3rd quartile values (median) for occupational doses on groups 1 and 2 were 0.35 (0.21) mSv (eye region), 0.25 (0.15) mSv (chest) and 1.47 (0 64) mSv (ankle). For nursing team the occupational doses were 0.06 (0.05) mSv on anterior chest region. Doses for posterior chest have not overcome the natural radiation levels. The PSD value obtained in vascular procedures was 1004.4 (786.4) mGy between groups 1 and 2. Conclusions: Occupational doses in the eye region were higher when compared to the chest, which demonstrates the importance of proper eye protection such as plumbiferous glasses and suspended guard shield. The values obtained in the ankle region were the highest among the measured points, suggesting the need of using the plumbiferous skirt attached to the table. The nursing team doses were lower compared to the physician ones. The PSD values were lower to the threshold for tissue reactions when compared to those reported in the literature, however the risks should not be neglected considering the uncertainties related to the number of cases studied and the high complexity of the procedures.