Preliminary study on the application of mitral valve prolapse model made by three‐dimensional printing in mitral valvuloplasty / 中华超声影像学杂志

ABSTRACT

Objective To evaluate the feasibility and accuracy of mitral valve prolapse( M VP) model made by three‐dimensional( 3D) printing based on three‐dimensional transesophageal echocardiography ( 3D‐T EE) data and the application value for mitral valvuloplasty . Methods 3D‐T EE volumetric data of 28 patients with M VP were acquired and postprocessed ,13 patients underwent mitral valve replacement and 15 patients underwent mitral valvuloplasty . A flexible material was used to made the valve 3D model by molding . T he areas of M VP identified by models were compared with surgical findings ,the circumference and the length and thickness of anterior and posterior mitral leaflets obtained from the valve specimens and the models were compared in the mitral valve replacement group . T he diameter between anterior and posterior ,the diameter between anterolaterior and posteromedial ,annulus area ,height of prolapsed leaflet and area of prolapsed leaflet were measured from 3D models and 3D‐T EE images in mitral valvuloplasty group . Surgical simulations were performed on the 3D models of the mitral valvuloplasty group ,and the water injection test was used to evaluate the surgical results and compared with the surgical results . Results 3D‐T EE volumetric data were successfully postprocessed and made as 3D M VP models in all patients . T he consistency of M VP location based on 3D models and surgical findings was 0 .92 . T he differences between the mitral valve replacement group and mitral valvuloplasty group were not significant ( P＞ 0 .05 ) . A simulation valvuloplasty was successfully performed on the 3D model in mitral valvuloplasty group ,2 patients underwent mitral valve replacement after water injection test . T he remaining 3D models successfully simulated the operation . Conclusions The M VP model made by 3D‐T EE and 3D printing technique has high feasibility and accuracy ,w hich may be promising for the mitral valvuloplasty of M VP .