Fig. 3From: Management of complicated choledochal cyst in children: ultrasound-guided percutaneous external drainage and subsequent definitive operationOperating instruments in US-guided percutaneous external drainage. (A) Ultrasound probes. (B) Mini-invasive kits of puncture, including puncture needle, sharp knife, tract dilator, guide wire, Pig-tail catheter, and external fixator. (C) The method of external fixationBack to article page