CT morphological characteristics of large and small infrarenal abdominal aortic aneurysm
- VernacularTitle:大、小肾下型腹主动脉瘤的CT形态学特点
- Author:
Hong YE
;
Yu LI
;
Jing YU
;
Ji GENG
;
Zhaoqi ZHANG
;
Zhanming FAN
- Publication Type:Journal Article
- Keywords:
Aortic aneurysm;
abdominal;
Morphology;
Tomography;
spiral computed;
Angiography
- From:
Chinese Journal of Interventional Imaging and Therapy
2010;7(1):38-42
- CountryChina
- Language:Chinese
-
Abstract:
Objective To evaluate the morphological characteristics of large and small infrarenal abdominal aortic aneurysm (AAA) with 64-slice spiral CT angiography (CTA). Methods Forty-five patients with infrarenal true AAA underwent CTA. The morphological characteristics of AAA were evaluated. The patients were divided into two groups: small AAA (diameter<5 cm, n=20) and large AAA (diameter≥5.0 cm, n=25). The clinical risk factors and morphological characteristics between small and large AAA were compared. The correlation between the size of AAA and the other morphological characteristics was analyzed. Results Compared to patients with small AAA, those with large AAA showed lower systolic blood pressure and larger prevalence of smoking (P＜0.05). The length of aneurysms body, diameter of proximal and distal neck, the prevalence of thrombus in posterior wall, and aneurysm wall calcification score in large AAA were significantly larger than those of small AAA (P＜0.05). The length of AAA was positively correlated with proximal neck angle (r=0.418, P＜0.01) and diameter (r=0.411, P＜0.01), whereas negatively correlated with entry angle (r=-0.478, P＜0.01)and proximal neck length (r=-0.562, P＜0.01). Conclusion The size of infrarenal AAA is associated with the other morphological characteristics.
