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VARIABILITY IN NORMATIVE URINE FLOW RATES

2004; Lippincott Williams & Wilkins; Volume: 171; Issue: 6 Part 2 Linguagem: Inglês

10.1097/01.ju.0000108682.00414.04

1527-3792

Wendy Bower, B.W.C. Kwok, Chung‐Kwong Yeung,

Pediatric Urology and Nephrology Studies

No AccessJournal of UrologyVoiding Dysfunction1 Jun 2004VARIABILITY IN NORMATIVE URINE FLOW RATES W.F. BOWER, B. KWOK, and C.K. YEUNG W.F. BOWERW.F. BOWER More articles by this author , B. KWOKB. KWOK More articles by this author , and C.K. YEUNGC.K. YEUNG More articles by this author View All Author Informationhttps://doi.org/10.1097/01.ju.0000108682.00414.04AboutFull TextPDF ToolsAdd to favoritesDownload CitationsTrack CitationsPermissionsReprints ShareFacebookLinked InTwitterEmail Abstract Purpose: Parameters derived from uroflowmetry are frequently used in the evaluation and reassessment of children presenting with lower urinary tract dysfunction. Since current nomograms have been constructed from 1 to 2 voids per child, variability of flow parameters is unknown. We evaluate intraindividual variability of flow parameters in children free of lower urinary tract symptoms. Materials and Methods: Children between 4 and 16 years old (mean age 9.8) who were hospitalized but not suffering from urinary tract infection, pyelonephritis or neurological disturbance, and who had neither structural abnormality of the urinary tract nor acute pain or disorientation voided spontaneously over a flowmeter on 4 to 6 occasions. Post-void urine was estimated by ultrasound within 5 minutes of micturition to confirm complete emptying. Results: A total of 98 subjects provided a mean of 4.4 traces each. Neither maximum nor average flow rate showed great intraindividual variability (maximum flow rate r >0.8, average flow rate r >0.74). Flow rates significantly correlated with flow duration, volume voided and patient age. Initial flow curves were bell-shaped in 63% of cases, staccato in 30% and intermittent in 6%. These proportions did not change with subsequent voids. There was no significant difference between genders with respect to staccato voiding, although boys demonstrated 70% of intermittent voids and were significantly older than girls. Conclusions: In normal children there is minimal variability in flow rates and the phenomenon of staccato voiding is seen approximately 30% of the time, despite no significant levels of post-void residual urine. References 1 : Flow rate nomograms in 7 to 16 year-old healthy children. Neurourol Urodyn1994; 13: 267. Google Scholar 2 : Maximum and average urine flow rates in normal children—the Miskolc nomograms. Br J Urol1995; 76: 16. Google Scholar 3 : Urinary flow in children: correlation with age, body height and body surface area. J Urol1996; 102: 85. Google Scholar 4 : Age related flow rate nomograms in a normal pediatric population. Acta Urol Belg1989; 57: 457. Google Scholar 5 : Urinary flow rate recording: the impact of a single dose of a diuretic on clinic logistics and flow rate parameters. 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Link, Google Scholar From the Department of Surgery, The Chinese University of Hong Kong Prince of Wales Hospital, Shatin, Hong Kong, SAR China© 2004 by American Urological Association, Inc.FiguresReferencesRelatedDetailsCited byOlsen L, Grothe I, Rawashdeh Y and Jørgensen T (2018) Urinary Flow Patterns in First Year of LifeJournal of Urology, VOL. 183, NO. 2, (694-698), Online publication date: 1-Feb-2010.Olsen L, Grothe I, Rawashdeh Y and Jørgensen T (2018) Urinary Flow Patterns in Premature MalesJournal of Urology, VOL. 183, NO. 6, (2347-2352), Online publication date: 1-Jun-2010.Olsen L, Grothe I, Rawashdeh Y and Jørgensen T (2018) Urinary Flow Patterns of Healthy Newborn MalesJournal of Urology, VOL. 181, NO. 4, (1857-1861), Online publication date: 1-Apr-2009.VanderBrink B, Gitlin J and Palmer L (2018) Uroflowmetry Parameters Before and After Meatoplasty for Primary Symptomatic Meatal Stenosis in ChildrenJournal of Urology, VOL. 179, NO. 6, (2403-2406), Online publication date: 1-Jun-2008.Yang S and Chang S (2018) The Effects of Bladder Over Distention on Voiding Function in KindergartenersJournal of Urology, VOL. 180, NO. 5, (2177-2182), Online publication date: 1-Nov-2008. Volume 171Issue 6 Part 2June 2004Page: 2657-2659 Advertisement Copyright & Permissions© 2004 by American Urological Association, Inc.Keywordsurineflowmetryobserver variationMetricsAuthor Information W.F. BOWER More articles by this author B. KWOK More articles by this author C.K. YEUNG More articles by this author Expand All Advertisement PDF downloadLoading ...