Wiper Andrew, Mamas Mamas, El-Omar Magdi
Manchester Heart Centre, Manchester Royal Infirmary, Manchester, UK.
Cardiovasc Revasc Med. 2011 Jan-Feb;12(1):68.e5-7. doi: 10.1016/j.carrev.2010.08.001. Epub 2010 Oct 20.
Visualization of distal vessel run-off following contrast injection in a coronary artery or bypass graft may be poor due to suboptimal 'seating' of the catheter or to competitive antegrade or retrograde flow from native vessels. In situations where percutaneous coronary intervention (PCI) is deemed necessary, such poor visualization may be compounded by poor guide catheter (GC) support, rendering intervention difficult or even impossible. These limitations may be overcome by deeply intubating the proximal or mid segment of the target vessel with a smaller GC through the outer GC. This double-coaxial catheter arrangement is often referred to as 'mother and child', with the outer GC being the 'mother' and the inner GC being the 'child'. Recently, several such catheters have become commercially available, including Terumo's Heartrail II catheter and Vascular Solutions' GuideLiner catheter.
在冠状动脉或旁路移植术中注射造影剂后，由于导管“定位”欠佳，或因来自自身血管的竞争性顺行或逆行血流，远端血管的血流显影可能不佳。在认为有必要进行经皮冠状动脉介入治疗（PCI）的情况下，这种不佳的显影可能会因导引导管（GC）支撑不足而加剧，使介入治疗变得困难甚至无法进行。通过使用较细的GC经外部GC深入插入目标血管的近端或中段，可以克服这些限制。这种双同轴导管配置通常被称为“子母导管”，外部GC为“母导管”，内部GC为“子导管”。最近，有几种这样的导管已上市，包括泰尔茂的Heartrail II导管和血管解决方案公司的GuideLiner导管。
