The main differences between PTC (percutaneous transhepatic cholangiography) and PTBD (percutaneous transhepatic biliary drainage) are:- Purpose - PTC is a diagnostic procedure to image the biliary system. PTBD is a therapeutic procedure to drain bile and relieve obstruction.- Contrast use - PTC inv

PTCD stands for percutaneous transhepatic cholangiography drainage. It is a minimally invasive procedure to drain bile from the biliary system. The key components of a PTCD introducer system are:- Chiba needle - A thin needle used to access the liver and bile ducts percutaneously (through the skin).