What Does A Pthc Puncture Needle Mean
Nov 10, 2022
Percutaneous transhepatic cholangiography (PTHC or PTC) or percutaneous cholangiography is used to visualize the anatomy of the biliary tract using radiographic techniques. The contrast agent is injected into the bile ducts of the liver and X-rays are taken.
If endoscopic retrograde cholangiopancreatography (ERCP) fails, the biliary tree can be entered. The program was first reported in 1937 and became popular in 1952.
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It is now performed primarily as a therapeutic technique. Less invasive methods for biliary tree imaging include transabdominal ultrasound, magnetic resonance biliary pancreatic imaging, computed tomography, and endoscopic ultrasound. If the biliary system is obstructed, biliary drainage can be performed using PTC until a more permanent resolution of the obstruction (e.g. surgery) is achieved.
In addition, self-dilating metal stents may be placed in malignant biliary strictures for palliative drainage. Percutaneous placement of metal stents allows for more selective placement of metal stents when therapeutic ERCP is unsuccessful and the anatomy is altered to prevent endoscopic separation of part of the bile duct that enters the duodenum or liver by drainage.
Biliary angiography in biliary drainage is called perioperative or primary cholangiography, and when performed later in the same drainage, secondary cholangiography.
