MP80-01 HOW OFTEN ARE OBSTRUCTING URETERAL STONES ASSOCIATED WITH NORMAL URINE DIPSTICK AND SERUM WBC?

Abstract

You have accessJournal of UrologyStone Disease: Evaluation II1 Apr 2015MP80-01 HOW OFTEN ARE OBSTRUCTING URETERAL STONES ASSOCIATED WITH NORMAL URINE DIPSTICK AND SERUM WBC? Yan Song, Natalia Hernandez, Andrew Stamm, and Brian Eisner Yan SongYan Song More articles by this author , Natalia HernandezNatalia Hernandez More articles by this author , Andrew StammAndrew Stamm More articles by this author , and Brian EisnerBrian Eisner More articles by this author View All Author Informationhttps://doi.org/10.1016/j.juro.2015.02.2837AboutPDF ToolsAdd to favoritesDownload CitationsTrack CitationsPermissionsReprints ShareFacebookTwitterLinked InEmail INTRODUCTION AND OBJECTIVES Ureteral colic due to an obstructing stone is a common presentation to the emergency department. We sought to evaluate how often serum and urine studies were unremarkable in patienst with this presentation. METHODS Two hundred thirty-two consecutive patients evaluated in an urban tertiary care emergency department and who were diagnosed with an obstructing ureteral stone on computerized tomography (CT) were evaluated. Inclusion criteria were as follows: ureteral stone diagnosed on CT, urine dipstick and serum WBC checked. Studies were considered “normal” if urine dipstick showed 0 RBC, 0 WBC, and was nitrite negative AND if serum WBC was < 12.0. RESULTS Mean patient age was 46.9 years (SD 15.4), gender prevalence was 35.8% female:64.2% male, mean axial stone diameter was 4.0 mm (SD 2.0), and mean serum WBC was 10.1 (SD 3.7). Stone position was proximal ureter – 24.6%, distal ureter – 27.1%, and ureterovesical junction – 48.3%. Completely normal urine dipstick and serum WBC was seen in 47 patients (20.2%), whereas 185 patients (79.7%) demonstrated at least a single abnormality of urine dipstick or WBC. On mulvariate logistic regression, neither age, gender, stone location, or stone size were significant predictors of the presence or absence of laboratory abnormalities. CONCLUSIONS Up to 20% of patients presenting with ureteral colic and ureteral stones will not demonstrate abnormalities of urine dipstick or serum WBC. These data may be helpful in selecting which patients may benefit from additional imaging or workup in cases when the diagnosis is not obvious. © 2015 by American Urological Association Education and Research, Inc.FiguresReferencesRelatedDetails Volume 193Issue 4SApril 2015Page: e1019 Advertisement Copyright & Permissions© 2015 by American Urological Association Education and Research, Inc.MetricsAuthor Information Yan Song More articles by this author Natalia Hernandez More articles by this author Andrew Stamm More articles by this author Brian Eisner More articles by this author Expand All Advertisement Advertisement PDF downloadLoading ...