What is intravenous urography?
by MedExpert on October 26th, 2007 Definition Intravenous urography is a test which x rays the urinary system using intravenous dye for diagnostic purposes. Of the many ways to obtain images of the urinary system, the intravenous injection of a contrast agent has been traditionally considered the best. The kidneys excrete the dye into the urine. X rays can then create pictures of every structure through which the urine passes. The procedure has several variations and many names. • Intravenous pyelography (IVP). • Urography. • Pyelography. • Antegrade pyelography differentiates this procedure from “retrograde pyelography,” which injects dye into the lower end of the system, therefore flowing backward or “retrograde.” Retrograde pyelography is better able to define problems in the lower parts of the system and is the only way to get x rays if the kidneys are not working well. • Nephrotomography is somewhat different in that the x rays are taken by a moving x ray source onto a film moving
