Value of iFlow software in hemodynamic evaluation of type B aortic dissection

doi:10.3760/cma.j.issn.1673-4777.2017.02.012

Abstract：Objective To investigate the value of iFlow in hemodynamic evaluation of type B aortic dissection.Methods A total of 39 patients with type B aortic dissection undergoing thoracic endovascular aortic repair(TEVAR) from January to March 2016 in Beijing Anzhen Hospital,Capital Medical University were enrolled.Digital subtraction angiography (DSA)examination was performed during operation;the iFlow software was used for image process to acquire color coded blood flow chart.The peak time of true lumen and false lumen was measured and the correlation between peak time and distance of measuring points was analyzed.Results In 37 patients who successfully had the examination,the peak time had no significantly differences among 4 measuring points of true lumen(P ＞ 0.05);the peak time of false lumen measuring points was (3.4 ± 1.3),(3.8 ± 1.4),(4.0 ± 1.4),(4.5 ± 1.3) s,respectively;there were statistically significant differences among 4 measuring points (F =3.920,P ＜ 0.05).The peak time of true lumen and false lumen increased with distance of measuring points of descending aorta(r2 =0.034,0.075;P ＜0.05).The general peak time of true lumen was (2.9 ±0.8)s;the general peak time of false lumen was (3.9 ± 1.4) s;there was a significant difference of blood flow velocity between true lumen and false lumen(P ＜ 0.01).Conclusion iFlow can be used for hemodynamic evaluation of type B aortic dissection.