Application Of Three Dimensional Reconstruction And Rapid Prototyping In The Operation Of Ventricular Septal Defect

Background3D printing technique appeared in the mid-20 th century,80 years,it is a kind of digital file-based model,the use of powdered metal or plastic bondable material,layer by layer by the method of printing technology to construct the object.Combined with 3D printing technology and medicine,the demand for the purpose that a series of clinical medicine derived from the model is a new breakthrough in the medical filed in recent years.ObjectiveBased on the data line 256 CT ventricular septal defect in children lesion reconstruction and create a solid model of children with ventricular septal defect,ventricular septal defect in children to explore the value of repair surgery,providing a new treatment for clinical ventricular septal defect repair perspective.Methods30 children with subarterial ventricular septal defect selected in September 2014 to July 2015,Zhengzhou City Hospital of cardiovascular disease by color Doppler ultrasound confirmed,17 males and 13 females,aged 2 years,5 months to 3 years,mean 2 years and 8months of age,weighing 9.6 ± 2.6kg.30 cases of children with ventricular septal defect underwent color Doppler ultrasound and cardiac imaging enhancement 256 CT,equipment provided by the Cardiovascular Hospital of Zhengzhou City,device models for the Dutch Philips Brilliance iCT,thickness 0.45 mm,continuous tomographic scan obtained 256 CTMedical Digital Imaging and Communications(Digital Imaging and Communications in Medicine,DICOM)image data,and then DICOM image data obtained into the Belgian company Materialise Mimics19.0 medical software,image optimization to reduce 256 CT factors and respiratory movement,heart beat shadows and spots.Determine cardiac imaging agents,cardiac muscle,fat threshold range based on CT imaging principle,and labeling.Medical use Mimics software reuse region growing and dynamic region growing algorithm to segment the target area.Then use Mimics software to edit masked,use the Edit command to be finely divided,separate internal contrast agent,to retain the normal structure and lesion images.Three-dimensional reconstruction data obtained 30 cases of children,according to the three-dimensional reconstruction data using US industrial 3DP Unlimited X1000 printer to print out 3D models. Results30 routine three-dimensional reconstruction and rapid prototyping of technical guidance ventricular septal defect in children undergoing repair are to achieve the desired CT raw data and then print a 3D Mimics software based on medical treatment of the resulting data.Intraoperative findings consistent with structural changes in the preoperative tumor model three-dimensional reconstruction and ventricular septal defect size.Preoperative three-dimensional reconstruction model measuring ventricular septal defect size average diameter of 7.10 ± 0.2mm,ventricular septal defect surgery found a mean diameter of 7.20 ± 0.2mm,the difference was not statistically significant(t = 0.82,P =0.43).30 cases of children according to pre-operative surgical planning to complete the surgery,the surgery went smoothly,ventricular septal defect patch are stitched good patch shape,size satisfaction.30 cases of children were not there atrioventricular block and tricuspid valve dysfunction and other complications.Left and right outflow tract morphology normal outflow tract obstruction and interventricular septum does not appear to change the residual shunt after repair.ConclusionsThree dimensional reconstruction and rapid prototype technology of the lesions in the patients with ventricular septal defect based on 256 CT data can accurately reflect the type of ventricular septal defect、defect size,providing the foundation of evaluations before cardiac surgery and surgical rehearse,intraoperative guidance,postoperative evaluation.