The identification and evaluation of likely high-dose electrophysiology (EP) procedures at a large teaching hospital Public Deposited

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  • March 21, 2019
Creator
  • Taylor, James Bradford
    • Affiliation: Gillings School of Global Public Health, Department of Environmental Sciences and Engineering
Abstract
  • Fluoroscopy-guided procedures utilizing x-rays may expose patients to radiation doses above the threshold for observable radiation-induced effects. Total fluoroscopy time is often available and serves as an indicator of skin dose. We conducted a retrospective review of fluoroscopy times for 225 procedures and identified ablations and biventricular (BIV) device implants as likely high-dose procedures, with mean fluoroscopy times of 62+48 minutes and 51+28 minutes, respectively. To determine which variables best describe dose, we measured skin dose for thirty subjects using radiochromic dosimetry film and found mean doses of 133+94 rad and 164+176 rad for ablation and BIV procedures, respectively. We correlated dose to fluoroscopy time, weight, body mass index (BMI), the weight and time product, and the BMI and time product, and found the latter two correlate best with r-2 values of 0.41 and 0.36, respectively. Overweight patients appear to be at the greatest risk of receiving high skin doses.
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  • In Copyright
Advisor
  • Fox, Donald L.
Degree granting institution
  • University of North Carolina at Chapel Hill
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