Other treatments include percutaneous ablation and chemoembolization. The feeding tube is usually inserted by percutaneous endoscopic gastrostomy (PEG). It has been used in percutaneous coronary intervention. It is used in a procedure called percutaneous coronary intervention (PCI). These methods include ameroid ring constrictors, cellophane banding, intravascular or percutaneous silicone hydraulic occluders. Methods of closure of an ASD include surgical closure and percutaneous closure. Other imaging options include MRCP (magnetic resonance cholangiopancreatography), ERCP and percutaneous or intraoperative cholangiography. Subcutaneous electrodes can be divided into percutaneous and implanted electrodes. Nerves can be stimulated using either surface (transcutaneous) or subcutaneous (percutaneous or implanted) electrodes. Conservative surgery consists of closed reduction with percutaneous fixation. One of the first surgical procedures developed was percutaneous tenotomy. This diagnostic genetic test procedure is known as percutaneous umbilical cord blood sampling. Closed reduction with percutaneous pinning has low complication rates. He developed a technique based on closed reduction with guided percutaneous pin placement. Aniline is toxic by inhalation of the vapour, ingestion, or percutaneous absorption.