Peak Urinary Flow Rate: Observations in Female subjects and Comparison to Male Subjects

Abstract

No AccessJournal of Urology1 Aug 1979Peak Urinary Flow Rate: Observations in Female subjects and Comparison to Male Subjects George W. Drach, Jeffrey Ignatoff, and Terry Layton George W. DrachGeorge W. Drach More articles by this author , Jeffrey IgnatoffJeffrey Ignatoff More articles by this author , and Terry LaytonTerry Layton More articles by this author View All Author Informationhttps://doi.org/10.1016/S0022-5347(17)56334-XAboutPDF ToolsAdd to favoritesDownload CitationsTrack CitationsPermissionsReprints ShareFacebookLinked InTwitterEmail Peak urinary flow rates and volume were determined with a disposable plastic device in 364 female subjects, ranging in age from 15 to 71 years. Of the subjects studied 166 were considered normal, 92 were considered abnormal and 106 were pregnant. The requirement for a minimum voided volume of 100ml. resulted in a loss of data from 105 patients, leaving 259 for analysis. Normal female subjects have higher peak flow rates for a given volume voided than do male subjects of the same age. When the minimum volume of 100ml. is accepted the mean of the female population is near 26ml. per second plus or mines 14. However, such means are not useful clinically because of change with flow owing to volume voided. Female peak flow rates did not show deterioration of voiding with age. Women with diseases such as stress urinary incontinence and urinary infection did reveal a significant decrease in peak urinary flow rate when compared to normal female subjects by linear regression. The mean peak flow rate of this group was 20ml. per second plus or minus 10. Limited observations were made in these patients after correction of stricture or treatment of urinary infection. In comparison to treated male patients abnormal female patients who were treated did not have as much improvement in peak urinary flow rate. Obstetrical patients were observed to void at consistently higher peak flows than normal female subjects. However, this increase was not statistically significant when compared to normal subjects. Also of interest is the observation that no obstetrical patient voided a volume larger than 350ml. Therefore, pregnancy appears to create more rapid voiding of smaller volumes than that of non-pregnant female subjects. © 1979 by The American Urological Association Education and Research, Inc.FiguresReferencesRelatedDetailsCited ByCohen A, Baradaran N, Mena J, Krsmanovich D and Breyer B (2019) Computational Fluid Dynamic Modeling of Urethral StricturesJournal of Urology, VOL. 202, NO. 2, (347-353), Online publication date: 1-Aug-2019.Johnson T, Burrows P, Kusek J, Nyberg L, Tenover J, Lepor H and Roehrborn C (2018) The Effect of Doxazosin, Finasteride and Combination Therapy on Nocturia in Men With Benign Prostatic HyperplasiaJournal of Urology, VOL. 178, NO. 5, (2045-2051), Online publication date: 1-Nov-2007.Fihn S, Johnson C, Pinkstaff C and Stamm W (2018) Diaphragm Use and Urinary Tract Infections: Analysis of Urodynamic and Microbiological FactorsJournal of Urology, VOL. 136, NO. 4, (853-856), Online publication date: 1-Oct-1986.Bottaccini M and Gleason D (2018) Urodynamic Norms in Women. I. Normals Versus Stress IncontinentsJournal of Urology, VOL. 124, NO. 5, (659-662), Online publication date: 1-Nov-1980. Volume 122Issue 2August 1979Page: 215-219 Advertisement Copyright & Permissions© 1979 by The American Urological Association Education and Research, Inc.MetricsAuthor Information George W. Drach More articles by this author Jeffrey Ignatoff More articles by this author Terry Layton More articles by this author Expand All Advertisement Loading ...