Damilakis John, Perisinakis Kostas, Theocharopoulos Nicholas, Tzedakis Antonios, Manios Emmanouel, Vardas Panayiotis, Gourtsoyiannis Nicholas
Department of Medical Physics, Faculty of Medicine, University of Crete, Iraklion, Crete, Greece.
J Cardiovasc Electrophysiol. 2005 Jul;16(7):773-80. doi: 10.1111/j.1540-8167.2005.40727.x.
Conceptus dose from occupational exposure.
A female employee working in the electrophysiology suite has the right to know potential radiation hazards to the unborn child before she is pregnant or before she decides to formally declare her pregnancy. Moreover, the employer of a declared pregnant worker must evaluate the work situation and ensure that the conceptus dose is kept below the maximum permissible level during the remaining gestation period. The aim of this study was to develop a method for conceptus dose anticipation and determination of maximum workload allowed for the pregnant employee who participates in fluoroscopically guided electrophysiological procedures.
A C-arm fluoroscopy system, an anthropomorphic phantom, and a radiation meter were used to obtain scattered air kerma dose rates separately for each of the three fluoroscopic projections typically used in the electrophysiology suite. Air kerma to conceptus dose conversion factors for all trimesters of gestation were calculated using Monte Carlo simulation. A formula is presented for the anticipation of the conceptus dose from occupational exposure of pregnant staff during fluoroscopically guided electrophysiological procedures. Normalized data are provided for conceptus dose estimation from occupational exposure of pregnant staff working in any electrophysiology laboratory. A methodology for estimation of maximum workload allowed for each month of the remaining gestation period of a worker who declared her pregnancy is proposed, which ensures that the regulatory dose limits are not exceeded.
Data presented may be used for the implementation of a radiation protection program designed for pregnant staff working in an electrophysiological suite.
职业暴露所致胎儿剂量
在电生理检查室工作的女性员工有权在怀孕前或决定正式宣布怀孕前了解对未出生胎儿的潜在辐射危害。此外，已宣布怀孕的员工的雇主必须评估工作情况，并确保在剩余妊娠期内胎儿剂量保持在最大允许水平以下。本研究的目的是开发一种方法，用于预测参与荧光透视引导电生理程序的怀孕员工的胎儿剂量，并确定其允许的最大工作量。
使用C形臂荧光透视系统、人体模型和辐射计，分别获取电生理检查室通常使用的三种荧光透视投影各自的散射空气比释动能剂量率。使用蒙特卡罗模拟计算妊娠各期的空气比释动能到胎儿剂量的转换因子。给出了一个公式，用于预测怀孕员工在荧光透视引导电生理程序期间职业暴露所致的胎儿剂量。提供了归一化数据，用于估计在任何电生理实验室工作的怀孕员工职业暴露的胎儿剂量。提出了一种方法，用于估计已宣布怀孕的员工在剩余妊娠期每个月允许的最大工作量，以确保不超过监管剂量限值。
所提供的数据可用于实施针对在电生理检查室工作的怀孕员工的辐射防护计划。
