Ординатура / Хирургия / Библиотека им академика М.И. Перельмана / Книга_3840_Библиотеки_им_академика_М_И_Перельмана

Bench testing allowsdirect anddetailed inspection of stent configuration atthe bifurcation and its relationship to the simulated bifurcation anatomy and stenting technique. Imaging is typically performed with high-quality cameras, microscopy, and microfocus X-ray computed tomography (MFCT) with resolution of 0.06 mm (8–11). An example of the difference in the quality of information attainable with IVUS versus MFCT is shown in Figure 1(A) and 1(B). As shown in Figure 1(A), the proximal segment of the SB stent was crushed due to incorrect guidewire recrossing, and subsequent dilation, outside of the SB stent using the modified crush stenting technique. The three-dimensional (3-D) images of MFCT demonstrate a large gap at the proximal segment of the SB. In the cross-sectional views, the absence of struts on the carina side and the evidence of two layers of crushed stent at the opposite site were clearly observed [Fig. 1(A)]. As shown in Figure 1(B), the IVUS images also show the crushed stent and non– strut-covered area, but the image resolution is inferior to that of MFCT. This may be because of the uneven pullback speed due to the slack of the catheter in the corner of the bifurcation, as well as due to oblique projection from the lateral side of the SB sweeping to the MV.