Normality in urodynamics studied in healthy adults

Purpose: Urodynamic data were evaluated prospectively in symptom-free adult s. Materials and Methods: A total of 28 men and 10 women with no history, symp toms or signs of urological disease and a mean age of 24 years were include d in the study. Free flow, cystometry and pressure flow studies were perfor med using standard techniques. Results: A wide variation was found in all urodynamic parameters. Different and changing now patterns, low maximum flow rate, large bladder capacity, bladder overactivity and residual urine, which are all usually considered s igns of pathological conditions, were seen. Data from free flow and pressur e flow studies correlated significantly but maximum flow rate was significa ntly lower, and voiding time and flow time were significantly longer in pre ssure flow studies. Conclusions: Technical urodynamics in their actual form are not physiologic al but they are the best tests available. Since normality in urodynamics ma y include so many different features the interpretation of technical urodyn amic investigations should be made with caution.