title: [Ejaculatory profile: a pressure of 5 meters H2O at the level of the bladder neck during ejaculation].
abstract: BACKGROUND
  The existence of a pressure gradient in order to prevent retrograde ejaculation in men with no ejaculatory disorders has always been postulated, but without any scientific evidence.
  
  
  METHODS
  The profile of the prostatic urethra was recorded during ejaculation in 5 men with no ejaculatory disorders using a 10 F balloon catheter with 16 pressure channels, situated in pairs every 5 mm, starting just below the balloon in the bladder neck and extending as far as the external urethral sphincter.
  
  
  RESULTS
  The pressure in the proximal part of the proximal urethra was 500 cm H2O in the five men, but this pressure did not exceed 400 cm H2O distally as far as the colliculus seminalis.
  
  
  CONCLUSIONS
  The authors present a new method for recording the urethral pressure profile during ejaculation (ejaculatory profile). This study provides a better understanding of the mechanisms of normal ejaculation and could be useful for the evaluation of disorders of ejaculation.
authors.affiliation: Service d'Urologie, Université de Berne, Suisse. elise.hugonnet@bluewin.ch
authors.forename: Christophe L
authors.initials: CL
authors.lastname: Hugonnet
authors.forename: Dominik
authors.initials: D
authors.lastname: Böhlen
authors.forename: Hans-Peter
authors.initials: HP
authors.lastname: Schmid
mesh_terms: D055592:Biophysical Phenomena; D001703:Biophysics; D002404:Catheterization; D004542:Ejaculation / Q000502:physiology*; D004867:Equipment Design; D006801:Humans; D008297:Male; D011312:Pressure; D001743:Urinary Bladder / Q000502:physiology*; D014867:Water
chemical_list: D014867:Water