The IVU Technique

An intravenous urogram, or IVU test, is an X-ray of the urinary tract. It can be used to assess problems in the kidneys, ureters, bladder and urethra. According to an August 2003 article in "Imaging Economics," newer technologies are replacing the IVU.

Procedure

• To perform the IVU test, the doctor injects iodine containing dye into the patient's forearm, according to the Urosurge website. Once the dye is injected, it travels through the bloodstream and concentrates in the kidneys. A series of X-rays are taken of the abdomen, usually every 5 to 10 minutes, while the dye filters through the kidneys and is excreted into the ureters, according to Patient UK.

X-rays

• Because the injected dye actually blocks X-rays, the kidneys, ureters and bladder appear white on the X-rays, according to the Patient UK website. The IVU is an out-patient procedure that usually takes about an hour, but sometimes additional X-rays are taken hours later.

Side Effects

• The patient may feel a sting when the dye is injected, as well as a warm sensation, which usually goes away quickly. Patients may also experience a metallic taste in their mouth.