Percutaneous transhepatic cholangiography (PTHC) is an x-ray test of the liver or the bile ducts. Bile is a yellowish-green fluid that is made by the liver and is stored in the gallbladder. Bile helps the body digest fats. The bile ducts are the tubes that carry bile from the liver to the gallbladder and small intestines. PTHC is used to find out if there is a blockage, to find the site of the blockage, or to check for other liver diseases.
In order to see blockages, a dye is injected directly into the drainage system of the liver. The dye can be seen on x-ray pictures projected on a TV screen as it moves through the ducts. If there is a blockage, the dye will show where it is located. Causes of a blockage may include a gallstone, cancer, or other growth.
Before the test be sure to let your healthcare provider know if you:
You may be asked not to eat or drink anything after midnight the day of the test, or for at least 8 hours before the test. The stomach must be empty in order to get clear x-ray images.
The test is often done as an outpatient, and usually takes 30 minutes to 1 hour. At the time of the test, an IV will be started and a mild sedative may be given. You will be asked to lie on your back on an x-ray table that tilts. The upper right side of the abdomen will be cleansed and a local anesthetic given. A long, thin, flexible needle will be inserted through the skin into the liver. The examiner will watch the dye moving through the bile ducts. Still x-rays will also be taken. If a blockage is found, it may be necessary for a thin flexible tube, called a catheter, to be inserted. This will allow the bile to drain into a collection bag outside of the body or into the small intestine.
After the test, bed rest is required for at least 6 hours. This is necessary to make sure there is no bleeding from the site of the injection. Possible side effects of the contrast dye include nausea, vomiting, flushing, itching, sweating, and salivating. You may notice soreness for 1 to 2 days at the site where the needle was inserted into the skin.
Follow your provider's instructions for reporting signs and symptoms that need follow-up.
Disclaimer: This content is reviewed periodically and is subject to change as new health information becomes available. The information provided is intended to be informative and educational and is not a replacement for professional medical evaluation, advice, diagnosis or treatment by a healthcare professional.
HIA File TST5130F.HTM Release 9.0/2006
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