title: The most advantageous timing of external ureteric compression during intravenous urography.
abstract: The objective of this study was to ascertain the most advantageous time during an intravenous urogram to apply external ureteric compression to gain the greatest calyceal distension. This was a prospective randomized trial of 60 patients, divided into three equal groups with compression applied immediately after injection, at 5 minutes and after the 5 minutes film had been viewed. Patients with the usual criteria for avoiding compression were excluded. A statistically significant improvement in calyceal distension occurred when compression was applied at 5 minutes compared with that applied after the 5 minute film had been viewed. No improvement was seen when the compression was applied immediately after injection. We recommend that external ureteric compression should be applied immediately after the 5 minute film.
authors.affiliation: Department of Radiology, Central Middlesex Hospital, London, UK.
authors.forename: T H
authors.initials: TH
authors.lastname: Hughes
authors.forename: A L
authors.initials: AL
authors.lastname: Hine
mesh_terms: D006801:Humans; D007668:Kidney / Q000000981:diagnostic imaging*; D007670:Kidney Calices / Q000000981:diagnostic imaging; D008722:Methods; D011312:Pressure; D011446:Prospective Studies; D011859:Radiography; D013997:Time Factors; D014513:Ureter