The Statistics And Analysis Of The X-ray Radiation Dose To Children In Cardiovascular Intervention

OBJECTIVE:According to measure the patients'X-ray radiation dose and the fluoroscopy time in cardiovascular intervention of our department (including congenital heart defects, catheter radiofrequency ablation, pacemaker installation, cardiac catheterization and cardioangiography, etc), to analyze the situation of the radiation in the intervention at this stage, and to explore the factors that affect the X-ray radiation and the ways to reduce it.METHODS:Analyze a total of 665 cases of cardiovascular intervention radiation data which has detailed records in our department, measure the entering dose, ED (mGy) and the fluoroscopy time for comparison; and do statistical analysis to four of the most common cardiovascular interventional operation between the patients last two years and those two years ago with the same operation.RESULTS:1. The mean and the standard deviation of the entering dose and the fluoroscopy time in different cardiovascular interventional operations have differences, the X-ray radiation dose of patent ductus arteriosus occlusion and pacemaker installation is lower, and the fluoroscopy time is shorter, the X-ray radiation dose of ventricular septal defect occlusion and complex congenital heart disease occlusion is greater, and the fluoroscopy time is longer.Besides, the dose-area product of the patients shows that the ventricular septal defect occlusion has a larger product.2. According to 2000 ICRP standard about the classification of the radiatial dose, the statistics shows that among the common operation of various cardiovascular intervention, the majority of ventricular septal defect occlusion are operations of high doses,106 cases, accounting for 79.7%,27 cases of medium doses, accounting for 20.3%, and no low-dose operation; patent ductus arteriosus occlusion has 32 cases of high doses, accounting for 13.0%, 211 cases of medium doses, accounting for 85.4%, low-dose operation in 4 cases,1.6%; atrial septal defect occlusion has 7 cases of high doses,10.3%, 55 cases are medium doses, accounting for 80.9%,6 cases of low-dose operation, accounting for 8.8%; percutaneous balloon pulmonary valvuloplasty in 13 patients has high doses, accounting for 17.3%, the medium doses have 62 cases, accounting for 82.7%.3. The statistics in four of the most common cardiovascular interventional operation between the patients last two years and those two years ago shows: the interventional fluoroscopy time of VSD occlusion and PDA occlusion in the last two years is significantly shorter than before, but the entering dose is not significantly reduced. The interventional fluoroscopy time and entering dose ofASD occlusion and PBPV last 2 years are neither significantly reduced.CONCLUSIONS:1. The factors that affect the X-ray radiation levels include forms of treatment, lesion complexity, operator proficiency and so on.2. At present X-ray radiation level in the diagnosis and treatment of children' cardiovascular intervention is decreasing gradually, but radiation levels of ASD occlusion and PBPV are not significantly reduced, VSD occlusion still has high radiation doses, which both should be adequate taken seriously.3. The radiation in the diagnosis and treatment is inevitable, and the most fundamental is how to minimize the unnecessary exposure of patients, without affecting the diagnosis and treatment of the premise, well intervention program for each patient, reducing the effective fluoroscopy time, in terms of aggregate reduce the incident dose.