Free uroflowmetry versus "do-It-Yourself" uroflowmetry in the assessment of patients with lower urinary tract symptoms

Gabriella Mombelli, Stefano Picozzi, Giovanni Messina, Dario Truffelli, Carlo Marenghi, Gabriele Maffi, Luca Carmignani

Research output: Contribution to journalArticlepeer-review


Introduction: We investigated the possibility that patients could carry out a urine flow assessment at home by themselves, in comfort, without expense and without the use of equipment. We compared this strategy of "Do-It-Yourself" (DIY) uroflowmetry with traditional, hospital uroflowmetry. Materials and methods: One hundred and twenty patients were enrolled. The patients underwent conventional, free uroflowmetry in hospital. Subsequently, the patients were asked to carry out the following procedure at home: urinate into a graduated container to quantify the total voided volume and determine the flow time by measuring the duration of miction with a stopwatch or simply with the second hand of a clock. This procedure had to be performed three times without preparation. Results: Hundred patients completed the study. The mean age of the patients analysed was 64.12 years. Their free uroflowmetry values were as follows: the mean voiding time was 44.28 s, the mean voided volume was 290.92 ml, the mean Qmax was 15.17 ml/s, the mean Qmean was 7.87 ml/s, and the mean post-void residual volume was 78.44 ml. The mean Qmean measured by the "DIY-uroflowmetry" was 8.33 ml/s, which was not statistically significantly different (P = 0.12). Assuming that pathological hospital uroflowmetry values are equivalent to a DIY-Qmean ≤10 ml/s and that normal hospital values are equivalent to a DIY-Qmean >10 ml/s, the concordance was 100%. Conclusions: Our proposed DIY evaluation of urine flow, together with the International Prostatic Symptom Score (IPSS), provides a good estimate of the results of free uroflowmetry, enabling unnecessary hospital investigations to be avoided.

Original languageEnglish
Pages (from-to)1915-1919
Number of pages5
JournalInternational Urology and Nephrology
Issue number10
Publication statusPublished - Oct 1 2014


  • Benign hyperplasia
  • Enlargement
  • Lower urinary tract symptoms
  • Prostate
  • Uroflowmetry

ASJC Scopus subject areas

  • Nephrology
  • Urology
  • Medicine(all)


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