Percutaneous catheter drainage in combination with choledochoscope-guided debridement in treatment of peripancreatic infection

Figure 3 Debridement guided by choledochoscope. Formation of sinus tract around the drainage tube (A) with a choledochoscope slowly inserted into the focus through the sinus tract (B) 7 d after drainage with a large drainage tube, flushing of accumulated pus and necrotic tissue fragments from the foci of SAP by injecting a large amount of sterile saline and 0.5% metronidazole into the infected foci via the water inlet of choledochoscope (C).