The Research Of Applying 3D Printing Technology In The Treatment Of Stanford A Aortic Dissection

Objective:The 3D printing is applied to the assisting clinical diagnosis and choosing the best operative strategy of the Stanford A aortic dissection to explore its value in diagnosis,individual surgical planning design,and postoperative morphological evaluation.Methods:Five Stanford type A aortic dissection patients' preoperative CT images are collected,and the data are processed then imported into the 3D printer.Ultra violet resin is used to print the 1:1 type A aorta model with the light curing method.The model is then scanned by the means of CT to obtain its CTA data,which are compared with the patient's original CT data in order to assess the consistency of the two.And we compare the model with the real aortic lesions during the operation to verify if the model could show the accurate lesion of aortic dissection.The postoperative model is made and evaluated in the same way,the accuracy of which is acceptable.To investigate the value of 3D printing technology in preoperative diagnosis,surgical planning and postoperative morphological evaluation of type A aortic dissection.Result:The preoperative 3D model accurately reflects the lesion morphology of the Stanford type A aortic dissection,the true and false lumens of the aortic dissection,and the major branches such as coronary artery,brachiocephalic artery,and intercostal artery originating from the aorta,its diameter,spatial location,distance between each other,whether it is affected by the dissection,and whether the opening is in a true cavity or a false cavity.Dividing the aorta longitudinally into two parts we can directly and clearly observe the internal structure of the aorta,to understand the relationship between true and false lumens of the aorta,the size of the true and false lumens,the location of the lumens,the size of the it,the number of it,and the positional relationship between arterial branches.The 3D model assists in the choosing the best operative strategy.The condition of the aortic lesion under direct vision is completely in line with the preoperative 3D model,and the surgery achieves satisfactory results.The postoperative 3D print model is consistent with the patient's postoperative CT image of the aortic diameter.It shows that the morphology of the artificial vessel is good,the false lumen in the stent is satisfactory,and there is no displacement or fracture in the stent position.The 3D model reflects the postoperative aortic morphological situation clearly.Conclusion:It is accurate and reliable that the Stanford A 3D model is produced by the 3D printing technology in this study.The surgeon can intuitively observe the shape of the aorta,the location of the branch,the scope of true and false lumens,and the status of its important branch vessels so as to classify the type,assist clinical diagnosis,choose the best operative strategy.The 3D model can intuitively reflect whether the postoperative aorta achieves satisfactory morphological goal.It also helps patients and their families understand the characteristics of such diseases,relevant principles of diagnosis and treatment,and treatment effects,thereby enhancing their confidence and improving compliance.3D printing provides an effective tool for the diagnosis and treatment of the type A aortic dissection.