For it one is necessary a device of x-rays, which are a form of electromagnetic radiation (like a light), they have a big energy and for it they can penetrate across the human body and produce an image in a photo badge. In this step the radiations are modified and by it, on having passed for dense structures for the bone in the badge, a white tone will appear, if it crosses structures with air a black tone appears. Between both thickness different tones can appear of gray, depending on the thickness of the structure crossed by the bundles of x-rays.

Thus there will happen a two-dimensional image of the structures of the kidney, uréteres and urinal bladder, with different tones of the black to the white person separating structures and delimiting textiles.

Since an iodized contrast way is used (I remove I darken) we will be able to see of sequential form the step of this contrast differentiating the size and the speed of excretion of the same one in both kidneys.

Also they will indicate him like proceeding to the cleanliness of the colon the previous day by means of the ingestion of an evacuating product or an enema of cleanliness.

The urografía is carried out in a x-rays room, with the patient naked and knocked down in a stretcher. Initially a radiography of the abdomen is done without contrast. Next, the contrast will be injected into a vein, and several radiographies will be practised on him in different time intervals.

Immediately after the injection of the intravenous contrast there takes a radiography, which will show clearly the interior and outline of the kidneys to value his size, form and position. Later new radiographies are realized to 5, 15 and 30 minutes.

The exploration usually lasts about 30 minute.

A technician realizes it in radiology and a medical specialist in Radiodiagnóstico visualizes the images and expresses a report. If during the exploration anomalies are observed, it is possible that the radiologist decides to realize more badges and the study gets longer.

If the patient is allergic to the contrasts (to the iodine) he can suffer an allergic reaction, which can be from light to important. If the patient knows this type of allergy he must communicate it before the test. If it does not know it it will not be foreseeable, but in the rooms where the urografía is realized there is material destined to treat this problem and the technical personnel it is trained to tackle these complications.