title: [Increasing flow parameters and bladder capacity and its implication in maturing of lower urinary tract].
abstract: THE AIM of the study was to estimate changes in urethral flow parameters and bladder capacity in children.
  
  
  METHODS
  Parents of 1055 children in the range of age 6-14 years were asked to fill a provided questionnaire. Parents of 466 children answered and agreed to have their child investigated. On the base of the questionnaire 103 children were excluded. Because of technical problems 33 children did not undergo the investigation. Voided volume less than 100 ml excluded farther 42 children. Uroflowmetric study was performed by means of Dantrec flowmeter (Urodyn 1000). Residual volume was assessed by means of ultrasonography. The results of 288 volunteers were analysed statistically (149 boys and 139 girls). Mean age was 10 yrs SD -- 2 yrs.
  
  
  RESULTS
  Voided volume and flow parameters were higher in girls. Although voided volume and flow parameters increased and voiding time decreased in relation to age, only the differences in average and maximal flow were found to be significant (p< 0.05).
  
  
  CONCLUSIONS
  The goal in development of lower urinary tract is to achieve the possibility to empty the bladder effectively. For this purpose increasing flow parameters seem to be most important.
authors.affiliation: Klinika Chirurgii i Urologii Dzieciecej, Akademia Medyczna, Poleska 17/10, 50-369 Wrocław, Poland.
authors.forename: Rafał
authors.initials: R
authors.lastname: Chrzan
authors.forename: Wojciech
authors.initials: W
authors.lastname: Apoznański
authors.forename: Jerzy
authors.initials: J
authors.lastname: Czernik
mesh_terms: D000293:Adolescent; D002648:Child; D005260:Female; D006801:Humans; D008297:Male; D012016:Reference Values; D012737:Sex Factors; D001743:Urinary Bladder / Q000254:growth & development* / Q000502:physiology*; D014554:Urination / Q000502:physiology*; D014563:Urodynamics / Q000502:physiology*