title: Potential pitfalls in the obstructive renal scan in patients with double-pigtail ureteral catheters.
abstract: In 21 patients with a long-standing internal ureteral double-pigtail catheter we demonstrated the adverse effect of a full bladder on upper system drainage. A pseudo-obstructive pattern noted in these patients on routine scans was immediately rectified by mere bladder emptying and a normal pattern was demonstrated. We suggest the bladder be emptied in all patients with indwelling internal ureteral stents before renographic evaluation.
authors.affiliation: Department of Urology, Tel-Aviv Medical Center, Sackler Faculty of Medicine, Tel-Aviv University, Israel.
authors.forename: A
authors.initials: A
authors.lastname: Greenstein
authors.forename: J
authors.initials: J
authors.lastname: Chen
authors.forename: H
authors.initials: H
authors.lastname: Matzkin
authors.forename: J
authors.initials: J
authors.lastname: Baron
authors.forename: Z
authors.initials: Z
authors.lastname: Braf
mesh_terms: D002408:Catheters, Indwelling; D005189:False Positive Reactions; D005260:Female; D006801:Humans; D008297:Male; D009942:Organometallic Compounds; D004369:Pentetic Acid; D011866:Radioisotope Renography; D016284:Technetium Tc 99m Pentetate; D001743:Urinary Bladder; D014546:Urinary Catheterization; D014554:Urination
chemical_list: D009942:Organometallic Compounds; D004369:Pentetic Acid; D016284:Technetium Tc 99m Pentetate