title: Penile colour duplex ultrasonography as a screening tool for venogenic erectile dysfunction.
abstract: BACKGROUND
  Vasculogenic impotence is one of the major causes of erectile dysfunction. Cavernosometry and cavernosography is traditionally the gold standard for evaluation of venogenic impotence. However, it is invasive and there are potentially significant complications. Penile colour flow Doppler imaging (PCDI) is non-invasive and can be used to assess venous incompetence.
  
  
  METHODS
  One hundred and sixty-eight patients were referred for PCDI assessment from March 1998 to February 2001. Forty-three of these also had cavernosogram and cavernosometry done and were included in the study.
  
  
  RESULTS
  The sensitivity was 93.9%, the specificity was 90.0%, the accuracy was 93.0% with a negative predictive value of 81.8% and a positive predictive value of 96.9%. Kappa value of 0.81 was obtained, indicating excellent agreement between PCDI and cavernosogram and cavernometry.
  
  
  CONCLUSIONS
  Penile colour flow Doppler imaging is accurate in the assessment of venogenic erectile dysfunction. It can replace cavernometry and cavernosogram as a screening tool. Cavernometry and cavernosogram should only be done in cases when PCDI suggests venogenic impotence, and when surgery is contemplated.
authors.affiliation: Department of Radiology, Changi General Hospital, 2, Simei Street 3, Singapore 529889. cyber.xray@yahoo.com
authors.forename: H S
authors.initials: HS
authors.lastname: Teh
authors.forename: M B K
authors.initials: MB
authors.lastname: Lin
authors.forename: I Y Y
authors.initials: IY
authors.lastname: Tsou
authors.forename: T K
authors.initials: TK
authors.lastname: Khoo
authors.forename: P H C
authors.initials: PH
authors.lastname: Lim
authors.forename: F C
authors.initials: FC
authors.lastname: Ng
authors.forename: C M
authors.initials: CM
authors.lastname: Chin
authors.forename: S O H
authors.initials: SO
authors.lastname: Peh
authors.forename: S H
authors.initials: SH
authors.lastname: Ho
authors.forename: K K
authors.initials: KK
authors.lastname: Ng
authors.forename: Y K
authors.initials: YK
authors.lastname: Fong
mesh_terms: D000328:Adult; D000368:Aged; D007172:Erectile Dysfunction / Q000000981:diagnostic imaging / Q000209:etiology; D006801:Humans; D018783:Impotence, Vasculogenic / Q000150:complications / Q000000981:diagnostic imaging*; D008297:Male; D008875:Middle Aged; D010413:Penis / Q000000981:diagnostic imaging*; D018615:Ultrasonography, Doppler, Color; D018616:Ultrasonography, Doppler, Duplex