低剂量影像策略在儿童室上性心动过速射频消融术中的辐射防护作用分析  被引量:5

Evaluation of a low dose imaging protocol on radiation exposure reduction in pediatric supraventricular tachycardia ablation procedure

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作  者:王凤[1] 陆颖[1] 袁超[1] 白家瑢 杨昊晟 吴琳[1] 

机构地区:[1] 复旦大学附属儿科医院心血管中心导管室,上海201102 [2] 美国德克萨斯大学奥斯汀分校自然科学学院

出  处:《中华儿科杂志》2017年第4期272-276,共5页Chinese Journal of Pediatrics

基  金:上海市卫生和计划生育委员会面上项目(201440631)

摘  要:目的 探讨在儿童室上性心动过速射频消融术中采用低剂量影像策略对于减少X线辐射剂量的可行性及有效性.方法 病例观察性研究,分析2014年1月至2016年10月在复旦大学附属儿科医院接受射频消融手术治疗的室上性心动过速103例患儿的体重、体表面积、室上性心动过速类型、旁路位置、手术透视时间以及电离辐射剂量(包括空气比释动能和剂量面积乘积)等资料.其中2014年1月至2015年9月47例,采用36 nGy/帧+10帧/s常规透视剂量设置(常规组);2015年10月至2016年4月24例,采用常规设置模式中取出滤线栅进行术中X线引导(去除滤线栅组);2016年5-10月32例,将透视剂量设置降低至23 nGy/帧+(4.0~7.5)帧/s,并同时取出滤线栅(去除滤线栅+低剂量组).计量资料的比较采用独立样本t检验或方差分析,计数资料的比较采用x2检验.结果 患儿平均体重(34±14) kg,平均体表面积(1.14±0.33)m2;术中平均透视时间(11±8) min,平均空气比释动能(12.97±12.43)mGy.3组患儿体重(F=2.551)、体表面积(F=2.359)、室上性心动过速类型(x2=6.15)及旁路位置分布(x2=3.438)差异均无统计学意义(P>0.05).低剂量参数设置下获取的图像能够提供术中所需的影像信息,无并发症发生.3组患儿的即刻手术成功率均为100%,X线透视时间差异无统计学意义(F=0.004,P>0.05).去除滤线栅+低剂量组的空气比释动能显著低于常规组,分别为(7.54 ±7.31) mGy、(16.25±12.08)mGy(F =6.112,P<0.01).结论 联合下调X线透视参数以及移除滤线栅的低剂量影像策略在儿童室上性心动过速射频消融术中安全有效,可显著降低手术中的电离辐射剂量.Objective To evaluate the feasibility and efficiency of a low dose imaging protocol on reducing X-ray dose level in pediatric supraventricular tachycardia (SVT) ablation procedure.Method Data were collected from 103 patients who underwent catheter ablation for SVT in Children's Hospital of Fudan University from January 2014 to October 2016 in terms of body weight,body surface area (BSA),SVT types,accessory pathway location,fluoroscopy time and the radiation dose (including AIR KERMA and dose area product) in a case observational study.The fluoroscopy protocols were operated at 36 nGy/frame and 10 frames/s (Standard group,n =47) from January 2014 to September 2015,36 nGy/frame and 10 frames/s with removal of the grid (Grid-out group,n =24) from October 2015 to April 2016,as well as 23 nGy/frame and 4.0-7.5 frames/s without the grid (Grid-out plus low dose group,n =32) from May 2016 to October 2016,respectively.Comparisons among groups were performed by independent-sample t-test or oneway analysis of variance for normally distributed continuous variables,and x2 test for categorical variables.Result The average body weight,BSA,fluoroscopy time and AIR KERMA of the three groups was (34 ± 14) kg,(1.14 ± 0.33) m2,(11 ± 8) minutes and (12.97 ± 12.43) mGy,respectively.No significant differences in body weight (F =2.551),BSA (F =2.359),SVT types (x2 =6.15),and accessory pathway location (x2 =3.438) were observed among these three groups (P 〉 0.05).Images acquired by low dose protocol could provide enough information for procedures,and no complication occurred.The acute success rates were 100% in all of these three groups,and there was no significant difference in mean fluoroscopy time (F =0.004,P 〉 0.05) among them.However,the radiation dose (AIR KERMA) in the Grid-out plus low dose group was much lower than that in the Standard group ((7.54±7.31) mGy vs.(16.25 ±12.08) mGy,F=6.112,P 〈 0.01)).Conclusion The new strategy of c

关 键 词:心动过速 室上性 导管消融术 辐射剂量 X线透视检查 儿童 

分 类 号:R725.4[医药卫生—儿科]

 

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