Purpose We sought to establish whether colpocystourethropexy creates bladder outlet obstruction, as evaluated by pressure-flow studies. Materials and Methods We retrospectively analyzed the records of 50 women. Preoperative evaluation included a detailed questionnaire, physical examination, urine culture, cystourethroscopy and multichannel urodynamic testing. Every patient underwent retropubic colpocystourethropexy according to the Tanagho modification of the original Burch technique. An average of 3 months after the operation clinical evaluation and identical multichannel urodynamic testing were repeated. Preoperative and postoperative urodynamic parameters were compared for each patient and statistical differences were established using Student's 2-tailed t test. Results No statistically significant difference was demonstrated in static urethral pressure profile parameters and in parameters during the filling phase of the cystometrogram except for cystometric capacity, which decreased after surgery (p = 0.02). In contrast, all 5 pressure-flow parameters analyzed (minimum urethral opening pressure, detrusor pressure at maximum flow, maximum flow, theoretical cross-sectional area and theoretical diameter of the flow rate controlling zone) showed statistically significant differences induced by surgery. Pressure-flow data reported on Schafer's diagram and on the Abrams-Griffiths nomogram failed to demonstrate urodynamically significant obstruction created by surgery. Conclusions Our data suggest that colpocystourethropexy does not create obstruction but, rather, restores pressure-flow conditions to a normal or nearly normal level.