The area of the groin or arm where the catheter will be inserted is shaved, cleaned, and numbed with local anesthetic. The radiologist (doctor who specializes in working with medical images like x-rays) makes a small incision in your skin so that a catheter can be placed into an artery. A catheter is a very thin, flexible tube. The doctor guides the catheter through the arteries to the area to be examined and injects the contrast material. The doctor watches the procedure with a fluoroscope, an x-ray unit with a television monitor. Several sets of x-rays are taken. Then the catheter is removed. The incision site is closed by placing pressure on it for about 10 minutes.
You will need to lie flat for two to six hours depending on your overall health and the reason for the exam. If you notice any swelling, bleeding, black and blue marks, or pain where the catheter was inserted, tell the nurse. You will be encouraged to drink a lot of fluids to flush the contrast material from your system. You may be allowed to leave the hospital after this recovery period, or you may have to stay up to a day for more observation and recovery.