PTCD管引流效果评估：超声造影清晰显示管路走形

Next, let's take a look at a case. The patient is a 72-year-old male with a tumor in the lower segment of the common bile duct. A PTCD tube was placed in the left external branch of the intrahepatic bile duct for drainage. We can see that conventional ultrasound cannot display the tip and specific shape of the drainage tube, but after injecting contrast agent through the drainage tube, the shape and the tip position of the drainage tube are clearly displayed.