翻译：我们都知道PTCD术后常规超声常常很难准确判断胆管内的引流管走形及其尖端具体位置。我们可以通过外置的引流管注射1ml稀释后的造影剂清晰显示引流管的走形及其尖端。与常规超声相比显著提高了引流管显示率。在我们的研究中发现超声造影的显示率达到了100

We all know that after PTCD surgery, routine ultrasound often finds it difficult to accurately determine the displacement of the drainage tube in the bile duct and its specific location at the tip. By injecting 1ml of diluted contrast agent into the externally placed drainage tube, the displacement of the drainage tube and its tip can be clearly displayed. Compared with routine ultrasound, the display rate of the drainage tube is significantly improved. In our study, the display rate of ultrasound contrast reached 100%