A percutaneous transhepatic cholangiogram (PTC) is a test that uses x-rays to look at the bile duct. The bile duct is a tube that drains bile out of the liver and into the small bowel.
A doctor called a radiologist will do the procedure. Once you are lying down, you will have a sedative to make you feel relaxed and drowsy. The doctor injects a local anaesthetic into the skin to numb it. Then they insert a long, thin, flexible needle through the skin and into the liver. You may feel some discomfort as the needle enters the liver.
The doctor looks at x-ray images on a screen to help them guide the needle to the bile duct. Once it is in the bile duct, they inject a dye. This helps shows any abnormality or blockages more clearly. When doctor injects the dye, some people feel warm all over. This is normal and the feeling does not last long.