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[[File:Society for Fetal Urology (SFU) grading of hydronephrosis.jpg|thumb|150px|SFU grading of [[hydronephrosis]].]]
Infuse Inject as much contrast as still comfortable by the patient. Observe the most distal part reached by contrast, and the shape thereof. Zooming in on this segment may detect subtle passage. Also turn your eye to the nephrostomy for leakage.
inject
==Procedure with established nephrostomy==
*Take an initial anteroposterior image including the presumed locations of the kidney, ureter and urinary bladder.
*Infuse Inject iodinated contrast, usually at least a volume corresponding to about 15 ml of 240mg/ml iodine. Observe both the imaging and whether the patient develops flank pain. Optionally, note how much contrast has been infused injected at that point.
*Note the following:
:*Location of the tip of the catheter in the kidney
:*Any visible hydronephrosis or hydroureter. If present, also note:
::*Severity of the hydronephrosis(see section below)
::*Any caliber change, or most distal part reached by contrast.
:*Any contrast outside the catheter or urinary tract, including leakage along the outside of the catheter
===If contrast does not reach the urinary bladder===
Obtain new projections after:
*Having the patient in a more standing position.
*Having the patient cough.
{{Grading of hydronephrosis}}
==Report==
:*Classification as partial or complete (that is, some or no passage of contrast)
:*Shape of the ureter at the obstruction.
:*Correlation to findings on previous imaging such as CT*Volume of contrast infusedinjected.
*Provocation with standing or coughing.
{|class="wikitable"
| [[File:Antegrade pyelogram of grade III hydronephrosis with obstruction at the ureterovesical junction.jpg|thumb|left|<ref>{{cite journal|last1=Efe|first1=Erkan|last2=Bakacak|first2=Murat|last3=Serin|first3=Salih|last4=Kolus|first4=Eyüp|last5=Ercan|first5=Önder|last6=Resim|first6=Sefa|title=Hormonal Treatment for Severe Hydronephrosis Caused by Bladder Endometriosis|journal=Case Reports in Urology|volume=2014|year=2014|pages=1–5|issn=2090-696X|doi=10.1155/2014/891295}}</ref>]]
The tip of the nephrostomy is located in an inferior calyx.<br>Approximately 50 ml of contrast is infusedinjected, whereupon the patient feels flank pain. There is grade III hydronephrosis and hydroureter, with tapering at the ureterovesical junction, and no contrast in the bladder. No leakage.
|}
{{Reporting}}
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