title: [Characterization of the DURR (dynamic urethral resistance relation] in the study of function lower urinary tract symptoms in the male].
abstract: OBJECTIVE
  To determine the type and to quantify the DURR phenomena in the male.
  
  
  METHODS
  We conducted a clinical and urodynamic study in 31 male patients with functional lower urinary tract symptoms.
  
  
  RESULTS
  DURR is produced by two types of mechanisms: urethral rigidity and contraction of the urethral wall. The patients with DURR produced by rigidity showed a higher score for irritative urinary symptoms. The patient with DURR produced by the contraction of the urethral wall had greater urodynamic consequences (increased opening pressure and PURR curve). The obstructive urinary symptoms were more intense when the DURR presented in the second phase of voiding (after reaching the maximum flow).
  
  
  CONCLUSIONS
  The DURR phenomena have clinical and urodynamic consequences in males with functional lower urinary tract symptoms; therefore their type and quantity should be adequately determined.
authors.affiliation: Servicio de Urología, Hospital Universitario San Carlos, Universidad Complutense, Madrid, España.
authors.forename: M
authors.initials: M
authors.lastname: Vírseda Chamorro
authors.forename: J
authors.initials: J
authors.lastname: Salinas Casado
authors.forename: J M
authors.initials: JM
authors.lastname: Aristizábal Agudelo
authors.forename: J M
authors.initials: JM
authors.lastname: Adot Zurbano
authors.forename: M
authors.initials: M
authors.lastname: Esteban Fuertes
authors.forename: H
authors.initials: H
authors.lastname: Fernández Ajubita
authors.forename: L
authors.initials: L
authors.lastname: Resel Estévez
mesh_terms: D000328:Adult; D000368:Aged; D004576:Electromyography; D006801:Humans; D008297:Male; D008875:Middle Aged; D009119:Muscle Contraction; D009127:Muscle Rigidity; D009130:Muscle, Smooth / Q000503:physiopathology; D010502:Perineum; D014521:Urethra / Q000503:physiopathology*; D014554:Urination / Q000502:physiology; D014555:Urination Disorders / Q000175:diagnosis / Q000503:physiopathology*; D014563:Urodynamics