2016•Unpublished venueRequires access
Application of combined lead screens to protect interventional cardiologist in the electrophysiology laboratory
Wei Sun, Lihui Zheng, Yan Yao, Kuijun Zhang, Yu Qiao, Bingbo Hou, Lingmin Wu, Jinrui Guo
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Abstract
Objective
Fluoroscopy remains an unreplaceable imaging technique in the contemporary electrophysiology era.We evaluated the impact of a combined lead screens, which is composed of a suspended-typed lead glass screen and a moveable lead screen, on clinically significant parameters of radiation exposure.
Methods
One hundred and seventeen patients receiving electrophysiology studies performed by a single experienced interventional cardiologist from December 2014 to June 2015 in Fuwai Hospital were continuously enrolled.Radiation dose rates in different X ray projections were measured, including right anterior oblique(RAO)30°, anterior posterior(AP), left anterior oblique(LAO)30° and LAO 45°.Measurements of radiation dose rate were repeated in different X ray projections with the protection of combined lead screens.Dose area product(DAP)and cumulative air kerma(CAK)data were automatically computed by the system for each x-ray acquisition.
Results
Under the protection of the combined lead screens, radiation dose rates in RAO 30°, AP, LAO 30° and LAO 45° projection were significantly dropped from(14.8±4.8) mSv/h, (26.9±15.6) mSv/h, (72.7±13.4) mSv/h, (131.4±75.5) mSv/h to(0.8±0.7) mSv/h, (2.4±0.7) mSv/h, (2.0±1.3) mSv/h and(2.6±1.6) mSv/h, respectively(P<0.001). In the subgroup analysis, radiation dose rate measured of the patients with BMI≥25.0 were statistically higher than that of the patients whose BMI was lower than 25.0 in all the three projection angles(AP, LAO 30° and LAO 45°). However, this difference of the radiation dose rates in the two groups disappeared after the application of the combined lead screen.
Conclusion
As a practical and applicable personal protection technique, the combined lead screens can offer an extra protection against radiation exposure for interventional cardiologist during the electrophysiology procedures.
Key words:
Electrophysiology study; Radiation exposure; Combined lead screens; Radiation protection