ASSESSMENT OF RADIATION DOSE IN ORTHOPEDIC INTERVENTIONAL PROCEDURES

Abstract

The main objective of this study is to evaluate the radiation dose incurred by medical staff and patients during orthopedic procedures, namely dynamic hip screw (DHS), dynamic cannulated screw (DCS) and closed intramedullary nailing (IMN). The entrance skin dose (ESD) for both staff and patients at different anatomic locations was measured using lithium fluoride (LiF: Mg, P,Cu GR: 200) thermoluminescence dosimeters (TLDs) and TLD reader (Fimel-France). The ambient dose around C-arm machine was also measured using CONYII ionization chamber. The mean values of fluoroscopic exposure factors for the procedures were 71±7 kVp, 1.3±0.6 mA and 0.68±0.13 min. The mean ESD was 0.26 and 7.9 mGy for staff and patient, respectively. On the average, the ESD for staff at specific anatomic locations was 0.15 ±0.02 (lens), 0.064 ± 0.01 (thyroid), 0.20±0.06 (chest), 0.23±0.2 (right hand) and 0.19±0.04 mGy for the left leg. The results revealed that staff and patients received higher radiation doses during DHS relative to DCS procedures; and that the orthopedist hands were most exposed than other organs. .