Abstract：
Dual-lumen microcatheters (DLMC) are utilized in challenging wiring scenarios as well as for contrast and medication injections. Nonetheless, lesion characterization remains extremely challenging in many cases. We describe a DLMC-facilitated technique which can assist in locating the distal anastomosis while navigating an occluded bypass graft during retrograde chronic total occlusion recanalization, as well as in the differential diagnosis of abrupt vessel closure. This \"DLMC Pullback Injection\" technique is performed by injecting contrast through the over-the-wire port of the DLMC, while the latter is quickly pulled back across the region of interest in a dynamic fashion. We believe this technique has the potential to solve challenging scenarios and to enrich the complex percutaneous coronary intervention operator\'s armamentarium.
摘要：
双腔微导管(DLMC)用于具有挑战性的布线方案以及用于造影剂和药物注射。尽管如此，在许多情况下，病变表征仍然极具挑战性。我们描述了一种DLMC促进的技术，该技术可以帮助定位远端吻合，同时在逆行慢性完全闭塞再通期间导航闭塞的旁路移植物，以及在突发性血管闭合的鉴别诊断中。这种“DLMC回拉注入”技术是通过DLMC的线上端口注入造影剂来执行的，而后者以动态的方式迅速在感兴趣的区域内被拉回。我们相信这种技术有可能解决具有挑战性的情况，并丰富复杂的经皮冠状动脉介入手术操作者的医疗设备。
