【摘要】 目的观察奇静脉CT表现,了解奇静脉异常的临床意义。资料与方法搜集CT增强检查奇静脉表现异常者119例作为异常组;随机抽取胸部CT增强检查未见纵隔肿瘤、心血管病变及肝硬化等异常表现者200例作为对照组。测量对照组CT像上奇静脉直径并观察其动脉期强化特点,对照分析异常组奇静脉异常的CT表现及临床意义。运用SPSS13.0统计软件分析,采用两独立样本t检验方法比较奇静脉管径男、女之间差异;采用F检验比较各年龄段之间差异。结果对照组各年龄段奇静脉正常管径为20～40岁(0.72±0.25)cm;>40～60岁(0.83±0.29)cm;>60岁(0.82±0.30)cm。男女间差异无统计学意义,年龄段间差异有统计学意义。异常组中奇静脉异常依据影像学改变可分为3种类型:变异(n=18)、异常强化(n=66)及扩张(n=52)。结论40岁以上人群奇静脉管径>12mm者即可视为奇静脉扩张,20～40岁人群奇静脉管径>10mm亦应视为扩张,增强后动脉期高密度的对比剂充盈奇静脉弓远端管腔即为异常强化。观察奇静脉的异常有助于早期发现潜在疾病及评估病变的严重程度,亦有利于术中避免损伤变异的奇静脉。更多还原

【Abstract】 Objective To observe the CT findings of the azygos vein and evaluate the clinical significance of azygos vein abnormalities. Materials and Methods 119 cases of azygos vein abnormalities on enhanced chest CT were collected as the abnormal group(71 cases were male,48 cases were female). 200 cases without azygos vein abnomalitied were randomly selected as the control group including 122 cases of male and 78 cases of female,in which there were no mediastinal tumor,cardiovascular disease and liver cirrhosis. The diameter and enhanced modality in arterial phase of the azygos vein were observed and measured in control group,then analyzed abnormal CT manifestations and clinical significance of azygos vein in abnormal group. Apply SPSS 13.0 statistical software,using two independent sample t tests to compare the difference of azygos vein diameter between male and female and F tests to compare the difference in different age group. Results The diameters of azygos vein were (0.72±0.25)cm in 20 and 40 years group,(0.83±0.29)cm in >40 and 60,and (0.82±0.30)cm over 60 group. There was no significant difference in sex groups,but statistical significance in age groups. 119 cases of abnormal azygos vein can be divided into 3 types:variation of azygos vein( n =18),azygos vein enlargement( n =66) and abnormal enhancement( n =52). Conclusion The diameter of azygos vein larger than 12 mm should be regarded as expansion in people over 40 years old,the azygos vein diameter larger than 10 mm in people between 20 and 40 years should also be considered as expansion,and high density contrast agent filling the lumen of distal azygos vein arch in arterial phase should be regarded as abnormal enhencement. Observation of azygos vein is benefical to detect the potential disease and to assess the severity of the lesions,it will help avoid injury of the abnormal azygos vein during operation as well.更多还原