Di Segni R, Engeler C, Letourneau J G, Yedlicka J W, Hunter D H, Amplatz K, Castañeda-Zuñiga W R
Ospedale S. Giovanni, Roma.
Radiol Med. 1991 Oct;82(4):484-92.
Intravascular US studies were performed with a 20 MHz rotating transducer mounted on a long flexible shaft in 14 patients undergoing interventional vascular procedures--i.e. percutaneous transluminal angioplasty (PTA), atherectomy with a Simpson device, and Palmaz stent placement. Intravascular US was used immediately before the procedure to assess the lesion characteristics and during and after the procedure to verify its results. In PTA, intravascular US clearly shows the fracture of the plaque, its separation from the medial layer, and the total longitudinal extension of the intimal flaps. Palmaz stents are clearly shown and their correct positioning on the arterial wall is therefore precisely evaluated. After atherectomy, intravascular US shows the changes in wall thickness and identifies the areas where more tissue needs to be removed. Intravascular US appears to be a very promising technique for monitoring and directing revascularization procedures by helping select the correct interventional procedure. The initial limitation of use of intravascular ultrasound catheters to straight arterial segments has been resolved by the development of over-the-wire catheters. Further technical development and clinical research are needed.
对14例接受血管介入手术（即经皮腔内血管成形术（PTA）、使用Simpson装置进行旋切术以及置入Palmaz支架）的患者，使用安装在长柔性轴上的20MHz旋转换能器进行血管内超声研究。血管内超声在手术前立即用于评估病变特征，并在手术期间和术后用于验证手术结果。在PTA中，血管内超声清楚地显示斑块破裂、其与中层分离以及内膜瓣的总纵向延伸。Palmaz支架清晰可见，因此可精确评估其在动脉壁上的正确定位。旋切术后，血管内超声显示壁厚变化并识别需要切除更多组织的区域。血管内超声似乎是一种非常有前景的技术，可通过帮助选择正确的介入手术来监测和指导血管重建手术。血管内超声导管最初仅限于用于直的动脉段，这一限制已通过线控导管的开发得到解决。还需要进一步的技术发展和临床研究。
