What is the role of uroflowmetry in the workup of enuresis?

Updated: Mar 26, 2020
  • Author: Wm Lane M Robson, MA, MD, FRCP, FRCP(Glasg); Chief Editor: Marc Cendron, MD  more...
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Answer

Uroflowmetry is a simple, noninvasive measurement of urine flow that is helpful in screening patients for neurogenic bladder and urethral obstruction. It is performed by having the child void into a special toilet with a pressure-sensitive device at the base.

A normal uroflow study shows a single bell-shaped curve with a normal peak and average flow rate for age and size. Children must be instructed to void when the bladder is full but not overfull; the uroflow curve in an overfull bladder can be tower-shaped or broad, and this can confuse the interpretation. Patients with dysfunctional voiding, urethral obstruction, or neurogenic bladder have prolonged curves or an interrupted series of curves and low peak and average urine flow rates.


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