title: [Urodynamic data].
abstract: This paper gives a survey of urodynamic data that may be used for evaluating functional aspects of the bladder and its excretory tract. The different parameters are physically defined. Units of the International System are used in the dimensional formulae, which facilitates the establishment of relations between these parameters. The so-called urethral drag can be derived from the pressure law of Blasius. The calculation is as follows: urethral drag = vesical pressure/(maximum urethral discharge). This value is proportional to the true vesical resistance in a physical sense.
mesh_terms: D006801:Humans; D008297:Male; D008792:Metric System; D012016:Reference Values; D014521:Urethra / Q000502:physiology*; D001743:Urinary Bladder / Q000502:physiology*; D014556:Urine / Q000502:physiology
vernacular_title: Urodynamische Messgrössen.