RESUMO
Operator radiation protection during percutaneous coronary angiography (CA) is a growing concern in the catheterisation laboratory (cath lab). The purpose of this study was to evaluate the efficacy of an additional mobile leaded shield on operator radiation exposure during diagnostic CA. The study involved two operators from the same cath lab and patients scheduled for diagnostic coronary catheterisation over a period of 2 months. Procedures were performed with standard radiation equipment during the first month. An additional mobile lead shield was added during the second month. Radiation exposure was measured by three dosimeters positioned on the operator's left hand, on their chest under the lead apron and on lead glasses. The intra-operator results were compared. Ninety-nine per cent of the procedures were carried out by radial access. For Operators 1 and 2, the mobile shield, respectively, decreased the radiation dose to the eyes by 43 and 33 % and to the hands by 61 and 83 %. Thorax dose was less than the minimum measurable dose (<0.01 mSv) for each operator. There was no significant difference in total procedure duration, fluoroscopy time or contrast dose required between the two groups of patients. Improved operator radiation protection is an important issue in the face of increased occupational doses. Mobile leaded shield, combined with standard preventive measures, seems to be an effective additional option to reduce the radiation exposure during diagnostic CA.