二氧化碳数字减影血管造影技术现状及临床应用

Current Status in Technique and Clinical Application of CO_2-DSA

目的:评价二氧化碳数字减影血管造影技术(CO_2-DSA)在临床上的应用和效果。材料和方法:对85例患者行 CO_2-DSA,包括肝、肾、脾、肠系膜上动脉造造影75例,腹主及四肢动脉造影3例直接门静脉造影6例,肝静脉造影1例。采用与气体造影相适应注射方法、投照条件及后处理方法以取得较好图像,同时行碘剂造影对照。结果:CO_2-DSA 可较好显示靶血管的主干及1、2级分支,且可引导介入插管,尽管对细微结构显示较碘剂差,但在显示肝肿瘤的动-门脉短路(APS)、肿瘤血窦(包括海绵状血管瘤)、逆行显示门脉等厅面优于碘剂造影,其副作用小。结论:CO_2-DSA 可取得准确、有用的血管造影图像,它是碘剂造影的必要补允,且安全性高。

Purpose:To evaluate clinical utility of carbon dioxide digital subtraction angiography(CO_2-DSA).Materials anti Methods:CO_2-DSA was performed in 85 patients including hepatic.renal,splenic,and super mesenterie arteriography in 75 cases,abdominal artefiography and extremity arteriography in 3 cases,direct portography in 6 cases, hepatic venography in 1 case.Delivery method met the behavior of the gas combination with optimal imaging technique and postprocessing method were applied in order to obtain image accuracy. The images quality of CO_2-DSA was then compared with that of conventional contrast agent arteriograms.Results:CO_2-DSA provided good visualization of the large vascular trunks and their 1st,2nd.grade branches of the target vessels,which could be beneficial for guiding interventional procedures.It was inferior to the conventional DSA in visualization of small vessels, however,CO_2-DSA was superior to conventional DSA in the detection of arterioportal shunts (APS),tumor blood sinuses(including Cavernous hemangioma),retrograde visualization of portal vein.The side effects were minimal.Conclusion:CO_2-DSA could provide accurate, clinical useful veseular images.CO_2-DSA is believed to be a safe and effective alternative to iodine contrast agent.