Skip navigation
MedlinePlus Trusted Health Information for You U.S. National Library of MedicineNational Institutes of Health
Contact Us FAQs Site Map About MedlinePlus
español Home Health Topics Drugs & Supplements Medical Encyclopedia Dictionary News Directories Other Resources

 

Medical Encyclopedia

Other encyclopedia topics:  A-Ag  Ah-Ap  Aq-Az  B-Bk  Bl-Bz  C-Cg  Ch-Co  Cp-Cz  D-Di  Dj-Dz  E-Ep  Eq-Ez  F  G  H-Hf  Hg-Hz  I-In  Io-Iz  J  K  L-Ln  Lo-Lz  M-Mf  Mg-Mz  N  O  P-Pl  Pm-Pz  Q  R  S-Sh  Si-Sp  Sq-Sz  T-Tn  To-Tz  U  V  W  X  Y  Z  0-9 

Renal venogram

Printer-friendly versionEmail this page to a friend
Contents of this page:

Illustrations

Kidney anatomy
Kidney anatomy
Kidney - blood and urine flow
Kidney - blood and urine flow
Renal veins
Renal veins

Alternative Names    Return to top

Venogram - renal; Venography; Venogram - kidney

Definition    Return to top

A renal venogram is a test to look at the veins in the kidney. It uses x-rays and a special dye (called contrast).

X-rays are a form of electromagnetic radiation like light, but of higher energy, so they can move through the body to form an image on film. Structures that are dense (such as bone) will appear white, air will be black, and other structures will be shades of gray.

Veins are not normally seen in an x-ray. That is why the special dye is needed. The dye highlights the veins so they show up better on x-rays.

See also: Renal arteriography

How the Test is Performed    Return to top

This test is done in a hospital. You will lie on an x-ray table. Local anesthetic is used, and you may ask for a sedative if you are anxious about the test.

The health care provider places a needle into a vein in the groin and then inserts a flexible tube called a catheter. This tube is moved through the groin vein until it reaches the vein in the kidney. The contrast dye flows through this tube. X-rays are taken as the dye moves through the kidney veins.

This procedure is monitored by fluoroscopy, a type of x-ray that creates images on a TV screen.

Once the images are taken, the catheter is removed and a bandage is placed over the wound.

How to Prepare for the Test    Return to top

You will be told to avoid food and drinks for about 8 hours before the test. Your doctor may tell you to stop taking aspirin or other blood thinners before the test. NEVER stop taking any medicine without talking to your doctor.

You will be asked to wear hospital clothing and to sign a consent form for the procedure. You will need to remove any jewelry from the area that is being studied.

Tell the health care provider if you:

How the Test Will Feel    Return to top

The x-ray table is hard and cold -- you may ask for a blanket or pillow. You may feel a sting when the anesthesia medicine is given and a burning feeling when the dye is injected. You may feel some pressure and discomfort as the catheter is positioned.

There may be tenderness and bruising at the site of the injection after the test.

Why the Test is Performed    Return to top

The test is done to detect blood clot , tumors, and vein problems. The test may also be used to measure hormone levels produced by the kidney.

Normal Results    Return to top

There should not be any clots or tumors in the kidney vein. The dye should flow quickly through the vein.

What Abnormal Results Mean    Return to top

Abnormal results may be due:

See also: Renal vein thrombosis

Risks    Return to top

Risks from this test may include:

There is low-level radiation exposure. However, most experts feel that the risk of most x-rays is smaller than other risks we take every day. Pregnant women and children are more sensitive to the risks of the x-ray.

Considerations    Return to top

This test is rarely done. It has largely been replaced by CT scan and MRI.

Update Date: 10/23/2006

Updated by: Stuart Bentley-Hibbert, M.D., Ph.D., Department of Radiology, Weill Cornell Medical Center, New York, NY. Review provided by VeriMed Healthcare Network.

A.D.A.M. Logo

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 1997-2008, A.D.A.M., Inc. Any duplication or distribution of the information contained herein is strictly prohibited.