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Objective: The application of multislice spiral CT angiography (MSCTA), explore the no left iliac vein compression venous leg symptoms subjects and its clinical significance. Materials and Methods: 202 cases of subjects with no symptoms of lower extremity venous line multislice CT pelvic enhanced scan across the level of the left iliac vein in the right iliac artery, using a multi-planar reconstruction, display and orthogonal cross-section measurements on both sides of the iliac vein on the short diameter and area calculation of the short axis of the left iliac vein compression rate and area compression rate, using the SPSS software to analyze the different gender, different age groups of the left iliac vein compression differences. Results: ① orthogonal cross-section of the left iliac vein short diameter compression rate was 27.06% ± 2.23%, area under pressure rate was 9.59% ± 1.63%, short diameter compression rate is significantly higher than the area of ??compression ratio (t = 8.980, P = 0.000). Statistical analysis (2) the area of ??the left iliac vein compression rate, compression rate lt; 25% of the subjects (n = 170), accounting for 84.16%, 25% ≤ compression rate lt; 50% of the subjects accounted for 11.88% (n = 24), accounting for 3.96% of the compression ratio ≥ 50% of the subjects (n = 8); the compression rate greater than 50% in 8 subjects, 7 were women, were men of female high incidence in males (P = 0.03). Study of 202 cases were divided into three groups: group A lt; 40-year-old, 40-year-old ≤ B group lt; 60 years of age, the C group ≥ 60 years of age; of the three age groups, 97 cases of female subjects left iliac The vein area compression rate pairwise comparison, the results show no significant difference (P AB = 0.249, P AC = 0.669, P BC = 0.293); area of ??105 cases of the three age groups of male subjects left iliac vein compression rate for statistical analysis, results showed that there was no significant difference (P AB = 0.401, P < sub> AC = 0.459, P BC = 0.841); area compression rate of the left iliac vein of the 202 subjects in three age groups, different gender for statistical analysis, the results show three age groups, there was no significant gender differences (A group: t = 0.492, P = 0.627; B group: t = 0.238, P = 0.813; Group C: t = 1.597, P = 0.113). ③ short diameter of the left iliac vein compression rate of the statistical analysis, the results show that the compression rate lt; 25% of the subjects accounted for 54.46% (n = 110), 25% ≤ compression rate lt; 50% of the subjects accounted for 29.27% ??(n = 59), the compression ratio ≥ 50% of the subjects, accounting for 16.34% (n = 33) in the compression rate greater than 50% of 33 subjects, 22 were women, 11 The high incidence of cases of male and female in males (P = 0.019). Short diameter of the left iliac vein compression rate of the three age groups of 97 cases of female subjects pairwise comparison, results showed that there was no statistical difference (P AB = 0.262 the P AC = 0.086, P BC = 0.870); short diameter of three age groups left iliac vein compression rate of 105 cases of male subjects for statistical analysis, and results were not significantly differences (P AB = 0.307, P AC = 0.156, P BC = 0.875); 202 patients in three age groups, different gender left iliac vein the short diameter compression rate for statistical analysis, the results show the three age groups, there was no significant gender differences (A: t = 0.941, P = 0.356; B group: t = 1.437, P = 0.156; C group: t = 1.883, P = 0.062). Conclusion: In 202 cases of this topic venous leg symptoms, whether from the short diameter compression rate or the area of ??compression rate considerations, the left iliac vein compression had no significant age and gender differences, but in the left iliac vein compression 50% of asymptomatic women than men. Iliac vein compression greater than 50% of the clinical, especially women, should be checked in time, to identify whether the left iliac vein compression syndrome.
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