Avaliação de doses ocupacionais em cirurgias ortopédicas

Abstract

The objective of the present study was measured as doses of occupational radiation at the level of the physician who performs orthopedic surgeries using a fluoroscopy device was exposed in his workday by means of a thermoluminescent dosimetry (TLD), comparing the occupational doses obtained with legislation and propose measures of radioprotection. From the monitoring carried out, after approval of the research by energy committees, between 18/12/2017 to 05/02/2018, reponses were obtained for the targetcritical points: whole body (thorax), crystalline, pneuide, right and left hands. From the average measurement values obtained for a procedure, an annual radiation dose is estimated in each of the analyzed regions and compared with a current legislation. Compared with CNEN 3.01, the effective dose estimate for the entire body (measured in the chest region) above the apron was 109 ± 86 mSv/year, four times higher than the national legislation (20,0 mSv / year), however, if the professional is considered to wear a plumbing apron (IPE) and even reduces a dose by 99,94%, an estimated dose decreased to 0,07 ± 0,05 mSv/year, being appropriate. As estimates of equivalent doses for the extremities (79 ± 55 mSv/year) and thyroid (61 ± 99 mSv/year), results are obtained under the current legislation: 500 mSv/year and 300 mSv / year for extremities and thyroid, respectively. (20 mSv/year): 79 ± 64 mSv/year. The results confirm the need to comply with the national laws in force through a monitoring program of the professional who is exposed to ionizing radiation, in addition to the use of radiation protection clothing such as apron, tire protector, gloves and goggles; focusing on the solo medical doctor, but on a whole team involved in the surgery.