A percutaneous transhepatic cholangiogram (PTCA) is an x-ray of the bile ducts inside and outside the liver. The x-ray is taken after contrast medium (dye) is injected directly into the bile ducts.
PTCA; Cholangiogram - PTCA
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 an x-ray machine that projects images onto a TV screen (fluoroscope), 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.
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.
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.
Bile is a by-product of protein metabolism. It is created in the liver and removed from the body through the intestines via the bile ducts. It contains bilirubin, which is a product of normal metabolism. If bile cannot be removed from the body, bilirubin collects in the blood and is seen as a yellow discoloration of the skin and eyes (jaundice). One cause of this is a blockage of the bile ducts.
Also, the pancreas creates digestive fluids, which drain via a common bile duct into the intestine. A blockage can prevent the fluids from draining, and may cause pancreatitis (inflammation of the pancreas).
A PTCA test can help identify whether a blockage is causing the jaundice or pancreatitis.
The bile ducts are normal in size and appearance for the age of the patient.
The results may show that the ducts are enlarged, which may indicate the ducts are blocked. The blockage may be caused by scarring or stones. It may also indicate cancer in the bile ducts, liver, pancreas, or region of the gallbladder.
There is a slight chance of an allergic reaction to the contrast medium (iodine).
There is a slight chance of excessive blood loss, blood poisoning (sepsis), and inflammation of the bile ducts.
This test has been mostly replaced by an endoscopic retrograde cholangiopancreatography (ERCP) test. A PTCA may be done if an ERCP test cannot be performed or has failed.
A magnetic resonance cholangiopancreatography (MRCP) is a newer, noninvasive imaging method, based on MRI. It provides similar views of the bile ducts, but is not always possible to perform.
Review Date: 3/5/2009
The information provided herein should not be used during any medical emergency or for the diagnosis or treatment of any medical condition. A licensed physician should be consulted for diagnosis and treatment of any and all medical conditions. Call 911 for all medical emergencies. Links to other sites are provided for information only -- they do not constitute endorsements of those other sites. Copyright ©2010 A.D.A.M., Inc., as modified by University of California San Francisco. Any duplication or distribution of the information contained herein is strictly prohibited.
Information developed by A.D.A.M., Inc. regarding tests and test results may not directly correspond with information provided by UCSF Medical Center. Please discuss with your doctor any questions or concerns you may have.