Understanding of urography

The urography (AUG) is an X-ray examination and as such can be considered as the basic urological investigation. As with all radiologic procedures in urology, first, a "plain film" made by the stomach. The technical term for this is Abdomenübersicht (abdomen = abdomen). This shot gives the doctor an overview of the soft tissue conditions in the abdominal cavity. Intestinal gas may interfere with the recording. Therefore, the person should be fasted prior to testing. If necessary, if the person is suffering from increased gas production, even on the eve of a gas-binding drug should be taken.


Contraindications to contrast media must be met.
Directly in front of the investigation concerned an iodine-containing, aqueous contrast medium via the vein into the bloodstream is gespritzt.Dazu it is important to know whether the person is allergic. In such a case, the administration of contrast agents cause allergic reactions. Even when a pregnancy may not be given contrast agent. These contraindications, the physician must exclude from the investigation.


In succession, kidney and urinary system visible.
The contrast agent is distributed in the blood, but not in the body tissues. In the kidneys, which filter the blood, then the contrast medium is washed out of the blood. Therefore, the contrast agent accumulates in the kidneys and is passed through the cavity system. This process takes some time. Thus, the series only after the kidneys, then the renal pelvis, ureter, bladder and the urethra eventually be mapped.


2 recordings are made after a set time schedule.
Usual two shots. A 7 to 10 minutes if the contrast agent accumulated in kidney tissue and in part already been propagated in the renal calyces is. The second shot after 15 to 20 minutes with the doctor can assess the ureter and bladder. Before the second shot should the person urinate. This is necessary so that the can be found in the bladder residual urine remaining. In addition, a lying in front of the urinary bladder are assessed only after their evacuation to safety.


A late inclusion disabilities can illustrate the drain.
Works delayed the kidney of an affected person, a so-called late recording is performed. These X-ray picture is taken just 24 hours after administration of contrast medium. This is most often the case with ureter. By the excretion of urine Harnleiterseite is obstructed and dammed the urine itself. A tumor may also be the cause. Usually such an obstruction exists only on one side. To determine the viability of the other kidney is why, despite the late inclusion of the two previous recordings also performed. If a kidney tumor, the cause, then it can be also seen in these photographs.


A silent kidney is not functional.
Is also on the 24-hour recording no contrast enhancement seen, the kidney goes for the doctor as a "dumb". That does not mean that the kidney "functionless" is. A strong urinary obstruction can lead to a "silent" kidney. She is recovering but again, if the urinary obstruction is removed and the cause that led to this accumulation, has failed for too long.


All organs of the abdominal cavity may be the cause of urological complaints.
With the IVU, the physician can assess not only the kidneys, but all other organs of the abdomen, such as vessels, liver or intestines, as well as ribs, vertebrae or pelvis. Each of these organs can be involved in their own way urological diseases or be the cause (for example, can cause a narrowing of the spinal canal to a neurogenic bladder dysfunction) or, more importantly, cause similar symptoms such as a ureteral stone. Because of all these possibilities of expression is the IVU is always the first X-ray examination in urology. Take place only after the case of unclear findings or specific questions further investigations.