Comparison between uroflowmetry and sonouroflowmetry in recording of urinary flow in healthy men

Jan Krhut*, Marcel Gärtner, Radek Sýkora, Petr Hurtík, Michal Burda, Libor Luňáček, Katarína Zvarová, Peter Zvara

*Corresponding author for this work

Research output: Contribution to journalJournal articleResearchpeer-review


Objectives: To evaluate the accuracy of sonouroflowmetry in recording urinary flow parameters and voided volume. Methods: A total of 25 healthy male volunteers (age 18-63years) were included in the study. All participants were asked to carry out uroflowmetry synchronous with recording of the sound generated by the urine stream hitting the water level in the urine collection receptacle, using a dedicated cell phone. From 188 recordings, 34 were excluded, because of voided volume <150mL or technical problems during recording. Sonouroflowmetry recording was visualized in a form of a trace, representing sound intensity over time. Subsequently, the matching datasets of uroflowmetry and sonouroflowmetry were compared with respect to flow time, voided volume, maximum flow rate and average flow rate. Pearson's correlation coefficient was used to compare parameters recorded by uroflowmetry with those calculated based on sonouroflowmetry recordings. Results: The flow pattern recorded by sonouroflowmetry showed a good correlation with the uroflowmetry trace. A strong correlation (Pearson's correlation coefficient 0.87) was documented between uroflowmetry-recorded flow time and duration of the sound signal recorded with sonouroflowmetry. A moderate correlation was observed in voided volume (Pearson's correlation coefficient 0.68) and average flow rate (Pearson's correlation coefficient 0.57). A weak correlation (Pearson's correlation coefficient 0.38) between maximum flow rate recorded using uroflowmetry and sonouroflowmetry-recorded peak sound intensity was documented. Conclusions: The present study shows that the basic concept utilizing sound analysis for estimation of urinary flow parameters and voided volume is valid. However, further development of this technology and standardization of recording algorithm are required.

Original languageEnglish
JournalInternational Journal of Urology
Issue number8
Pages (from-to)761-765
Publication statusPublished - 1. Aug 2015
Externally publishedYes


  • Sound recording
  • Urinary flow
  • Voided volume
  • Wireless data transfer
  • Urodynamics/physiology
  • Humans
  • Middle Aged
  • Male
  • Acoustics
  • Sound
  • Healthy Volunteers
  • Young Adult
  • Adolescent
  • Urination/physiology
  • Adult
  • Urine/physiology
  • Urinary Bladder


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