nocturnal penile tumescence

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nocturnal penile tumescence (NPT)

Etymology: L, nocturnus, by night, penile, pertaining to the penis, tumescere, to begin to swell
a normal condition of penile erection that occurs during sleep throughout most of the lifetime of a male. The occurrence of NPT is important in the diagnosis of impotence because its presence indicates that impotence may be psychogenic.

nocturnal penile tumescence

Sexology The spontaneous erection of the penis during sleep occurring from birth to advanced old age, typically, 3 episodes/night, for a total of 2-3 hrs (!!!); NPT occurs during REM sleep and is accompanied by erotosexual dreams. See Postage stamp test.

nocturnal penile tumescence



Erection occurring during sleep. In the normal male, erections during sleep begin in early childhood and continue to at least the eighth decade. The total time of NPT averages 100 minutes per night. In evaluating erectile dysfunction (ED), the presence of NPT suggests the patient has psychogenic rather than neurogenic or vascular ED.
References in periodicals archive ?
Nocturnal penile tumescence and rigidity monitoring in young potent volunteers: reproducibility, evaluation criteria and the effect of sexual intercourse.
Comparison of Rigiscan and formal nocturnal penile tumescence testing in the evaluation of erectile rigidity.
New method for continuous measurements of nocturnal penile tumescence and rigidity.
Effects of chronic alcoholism on nocturnal penile tumescence.
As an objective, noninvasive measurement of the erectile activity, nocturnal penile tumescence (NPT) has been considered as the gold standard for differentiating psychogenic and organic erectile dysfunction (ED).
Nocturnal penile tumescence, AVSS: Audio visual sexual stimulation, SD: Standard deviation Table 2.
Comparative study between audiovisualsexual stimulation test and nocturnal penile tumescence test using RigiScan Plus in the evaluation of erectile dysfunction.

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