title: Avoiding false positive findings in measuring nocturnal penile tumescence.
abstract: The measurement and interpretation of nocturnal penile tumescence (NPT) studies depend on appropriate measurement techniques, knowledge of the conditions during which NPT was recorded, and a lack of preconceived notions about the relationship of penile circumference to penile rigidity. This case report illustrates several of the most common problems in the measurement and interpretation of NPT that could result in a false positive finding.
authors.affiliation: Department of Neurology, Medical College of Pennsylvania, Eastern Pennsylvania Psychiatric Institute, Philadelphia.
authors.forename: M R
authors.initials: MR
authors.lastname: Pressman
authors.forename: J M
authors.initials: JM
authors.lastname: Fry
authors.forename: M A
authors.initials: MA
authors.lastname: DiPhillipo
authors.forename: R T
authors.initials: RT
authors.lastname: Durante
mesh_terms: D000368:Aged; D007172:Erectile Dysfunction / Q000175:diagnosis*; D005189:False Positive Reactions; D006801:Humans; D008297:Male; D008991:Monitoring, Physiologic; D010410:Penile Erection / Q000502:physiology*; D012890:Sleep / Q000502:physiology