title: Comparative study between audiovisualsexual stimulation test and nocturnal penile tumescence test using RigiScan Plus in the evaluation of erectile dysfunction.
abstract: BACKGROUND
  Although the nocturnal penile tumescence (NPT) test is considered the gold standard for the differential diagnosis of psychogenic versus organic erectile dysfunction (ED), concerns have recently been raised regarding the financial and time expenditure it demands. We evaluated the diagnostic efficacy of the audiovisual sexual stimulation (AVSS) test as an alternative to the NPT test.
  
  
  METHODS
  A total of 43 patients with ED were examined. Each patient filled in an International Index of Erectile Function (IIEF) questionnaire. The evaluation of each patient consisted of AVSS and NPT tests which were performed using the RigiScan Plus. The results obtained with the two tests were compared. The patients with normal NPT patterns were presumed to have a psychogenic etiology of their ED and those with abnormal NPT patterns to have an organic etiology.
  
  
  RESULTS
  The overall IIEF score was 32.5 +/- (SD) 9.2, and the erectile domain score was 12.2 +/- 4.5. Twenty-three patients had normal responses to the AVSS test, while 20 had abnormal responses. Twenty-two of the former 23 patients and 9 of the latter 20 patients had normal NPT patterns. Therefore, the AVSS test discriminated psychogenic ED with 71% sensitivity and 92% specificity. The overall accuracy of the test in this study was 77%.
  
  
  CONCLUSIONS
  The AVSS test is simple, practical, and inexpensive, and its diagnostic accuracy is comparable to that of the NPT test. We conclude that the AVSS test should be the examination of choice for the primary etiological diagnosis in ED.
authors.affiliation: Department of Urology, Faculty of Medicine, Toyama Medical and Pharmaceutical University, Toyama, Japan.
authors.forename: Ichiro
authors.initials: I
authors.lastname: Mizuno
authors.forename: Hideki
authors.initials: H
authors.lastname: Fuse
authors.forename: Yasuyoshi
authors.initials: Y
authors.lastname: Fujiuchi
authors.forename: Osamu
authors.initials: O
authors.lastname: Nakagawa
authors.forename: Takuya
authors.initials: T
authors.lastname: Akashi
mesh_terms: D000328:Adult; D000368:Aged; D007172:Erectile Dysfunction / Q000175:diagnosis*; D006801:Humans; D008297:Male; D008875:Middle Aged; D010410:Penile Erection; D010812:Physical Stimulation