Renal Angiography

Renal angiography is a procedure done to study the blood vessels in the kidneys. The procedure is done through a catheter (thin, flexible tube) placed into a blood vessel through a small incision. Contrast medium (x-ray dye) is injected to make the blood vessels stand out on x-ray images. X-rays are then taken. The procedure is often done by a specially trained doctor called an interventional radiologist.

Before the Procedure

Follow any instructions you are given on how to prepare, including:

• Do not eat or drink anything for 6 hours before the procedure.

• Tell the technologist what medications, herbs, or supplements you take; if you are, or may be, pregnant; or if you are allergic to contrast medium, or other medications.

During the Procedure

• You'll change into a hospital gown and lie on an x-ray table. An IV (intravenous) line is put into a vein to give you fluids and medications. You may be given medication through the IV to help you relax.

• The skin at the insertion site (usually at the groin) is numbed with local anesthetic. Then, a needle with a thin guide wire is inserted through the skin into the blood vessel. The catheter is placed over the guide wire into the blood vessel.

• Contrast medium is injected into the blood vessel. Using x-ray images as a guide, the radiologist moves the catheter through the blood vessels to the kidney.

• More contrast medium is injected into the blood vessels that supply the kidneys.

• Remain still while the x-rays are being taken. Pillows and foam pads may help you stay in position. You may be asked to hold your breath for 10 to 25 seconds at a time.

• When the procedure is done, the catheter is removed. Pressure is put on the insertion site for 15 minutes to stop bleeding.

After the Procedure

• You may be told to lie flat and keep the leg with the insertion site straight for 6 hours to prevent bleeding.

• You may stay in the hospital overnight.

• Drink plenty of fluids to help flush the contrast medium from your system.

• Once you go home, care for the insertion site as directed.