Percutaneous transhepatic cholangiogram (PTCA)

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Percutaneous transhepatic cholangiogram (PTCA)

Definition:

A percutaneous transhepatic cholangiogram (PTCA) is a type of x-ray of the bile ducts inside and outside the liver. The x-ray is taken after a contrast medium is injected directly into a liver bile duct.

Alternative Names:

Cholangiogram - PTCA; PTCA

How the test is performed:

The test is performed in a radiology department by a radiologist. You will be asked to lie on your back on the x-ray table. The upper right side of your abdomen will be cleansed and you will be given a local anesthetic. A long, thin, flexible needle is then inserted through the skin into the liver.

With guidance from the fluoroscope (an x-ray machine that projects images onto a TV screen), the bile duct is located and the contrast medium injected. The contrast medium then flows through the ducts and can be seen on the fluoroscopic monitor.

How to prepare for the test:

Inform the health care provider if you are pregnant. You will be given a hospital gown to wear and will be asked to remove all jewelry.

How the test will feel:

There will be a sting as the anesthetic is given and some discomfort as the needle is advanced into the liver. You may be given medication for sedation and/or pain control. Generally, the x-ray itself causes little or no discomfort.

Why the test is performed:

Bile is a by-product of protein metabolism. It is created in the liver and excreted into the intestines via the bile ducts. If bile cannot be removed from the body, it collects in the blood and is seen as a yellow discoloration of the skin and eyes (jaundice).

Also, the pancreas creates digestive fluids which drain via a common bile duct into the intestine, and thus obstruction can prevent the drainage of the fluids and may cause pancreatitis (inflammation of the pancreas).

A PTCA test can help identify whether a blockage is causing the jaundice and pancreatitis.

Review Date: 1/24/2005
Reviewed By: Jeffrey J. Brown, M.D., F.A.C.R., Mallinckrodt Institute of Radiology, Washington University School of Medicine, St. Louis, MO. Review Provided by VeriMed Healthcare Network.

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