Urologie pro praxi 2/2023

Urodynamics – when and what type od examination

Urodynamics (UDN) is a functional examination of lower urinary tract, i. e. the bladder and the subvesical area (sphincter and prostate), the evaluation is carried out based on measured and calculated pressure values and urine flow. Urodynamic examination consists of non-invasive measurement of urine flow (uroflowmetry) and invasive methods – examination of the filling phase (filling cystometry) and micturition phase (micturition cystometry or PQ study). The indication to invasive urodynamic examination should be preceded by a non-invasive examination, especially a patient history, functional examination of the S2–S4 reflexes, questionnaires and a drinking and voiding diary. The subject of this short article is the presentation of basic neurophysiological data important for the indication and performance of UDN, followed by a brief overview of individual methods with indications for their use.

Keywords: urodynamic examination, uroflowmetry, filling cystometry, voiding cystometry, frequency volume chart, lower urinary tract dysfunction.