猪肺动、静脉的螺旋CT观察及应用解剖

Applied anatomy of the artery and vein in swine lung by spiral CT

目的:运用螺旋CT扫描正常离体猪肺,区分猪肺动脉及肺静脉,评估猪肺动脉性纹理与静脉纹理。方法:对30只离体猪肺动、静脉灌注羧甲基纤维素泛影葡胺液后进行螺旋CT扫描;并解剖肺动、静脉,制作铸型的肺动脉、肺静脉及支气管标本。结果:离体猪左肺分上、中与下叶占85.7%,仅有上、下叶占14.3%;右肺分上、中、下叶占93.75%,仅有上、下叶占8.3%。通过螺旋CT的MIP技术重建,可较好地进行分段;在CT上能分辨至5～6级肺动、静脉;动脉和静脉走行位置有显著性差异,亚段级以下至5～6级动静脉发出角度有差异。结论:螺旋CT可较好辨识至5～6级离体猪肺的动脉和静脉,并能测量相应级别的血管径值,螺旋CT能区分离体猪肺的动脉性纹理和静脉性纹理。

Objective： To classify the pulmonary arteries and veins in the separated porcine lungs, and to evaluate its arterial and venous markings with spiral CT. Methods： After filling solutions of carboxymethyl cellulose and angiografin into the pulmonary arteries and veins, thirty porcine lungs were scanned with spiral CT, and cast specimens of the pulmonary arteries and veins were prepared. Results： The lungs contained superior,median and inferior lobes were found 85.7%of the left lungs and 93.75% of right lungs. And, 14. 3%of the left lungs and 8.3% of right lungs were only composed of the superior and inferior lobes. By using MIP reconstruction, spiral CT distinguished the pulmonary arteries to veins at Grade 5-6 according to Strahler grade system. Conclusion： Spiral CT can differ the pulmonary artery from veins at Grade 5-6, measure according diameters, and therefore define the arterial and venous markings in separated porcine lungs.