Fig. 3From: Overcoming tight perihilar malignant biliary obstructions during percutaneous biliary intervention in Nigerian patients: case reportsFluoroscopic image showing a clamp (yellow arrow) holding a retrogradely inserted wire outside the skin. A 4-Fr catheter (green arrow) was inserted over the captured wire (blue arrow), and a tandem 0.018-inch wire (red arrow) was inserted through the same 4-Fr catheter to gain distal accessBack to article page