The Dmax values were measured by a trained radiologist from 70 collected CT scans, and the corresponding PWS and PWRR were evaluated using Finite Element Analysis (FEA). The cohort was ordered according to the difference between axialDmax and orthoDmax (Da-o) quantifying the aneurysm angulation, and Spearman\'s correlation coefficients between PWS/PWRR - orthoDmax/axialDmax were calculated.
The calculated correlations PWS/PWRR vs. orthoDmax were substantially higher for angulated AAAs (with Da-o≥3mm). Under this limit, the correlations were almost the same for both Dmax values. Analysis of AAAs divided into two groups of angulated (n=38) and straight (n=32) cases revealed that both groups are similar in all parameters (orthoDmax, PWS, PWRR) with the exception of axialDmax (p=0.024).
It was confirmed that orthoDmax is better correlated with the alternative rupture risk predictors PWS and PWRR for angulated AAAs (DA-O≥3mm) while there is no difference between orthoDmax and axialDmax for straight AAAs (DA-O<3mm). As angulated AAAs represent a significant portion of cases it can be recommended to use orthoDmax as the only Dmax parameter for AAA rupture risk assessment.
Dmax值由受过训练的放射科医生从收集的70次CT扫描中测量,使用有限元分析(FEA)评估相应的PWS和PWRR。根据axialDmax和orthoDmax(Da-o)之间的差异对该队列进行排序,以量化动脉瘤角度,计算了PWS/PWRR-orthoDmax/axialDmax之间的Spearman相关系数。
计算的相关性PWS/PWRR与成角度的AAAs(Da-o≥3mm)的orthoDmax明显更高。在这个限制下,两个Dmax值的相关性几乎相同.将AAAs分为成角度(n=38)和直(n=32)两组病例的分析显示,两组在所有参数上都相似(orthoDmax,PWS,PWRR),axialDmax(p=0.024)除外。
已证实,对于成角度的AAAs(DA-O≥3mm),orthoDmax与替代破裂风险预测因子PWS和PWRR的相关性更好,而对于直AAAs(DA-O<3mm),orthoDmax与axialDmax之间没有差异。由于成角度的AAAs代表了很大一部分病例,因此可以建议使用orthoDmax作为AAA破裂风险评估的唯一Dmax参数。