Stephen J. Schueler, M.D.

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Erectile Dysfunction NPT Testing

Nocturnal penile tumescence (NPT) is a useful test to help determine the cause of impotence.

Normally, erections occur during sleep. This is called nocturnal penile tumescence. Each night, the average of length of time that NPT occurs is 100 minutes. NPT can be measured with a special instrument attached to the penis.

If nocturnal erections occur, then the cause of impotence is more likely to be psychological instead of physical.

Continue to Erectile Dysfunction Treatment

Last Updated: May 19, 2008 References
Authors: Stephen J. Schueler, MD; John H. Beckett, MD; D. Scott Gettings, MD
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PubMed Erectile Dysfunction References
  1. DePalma RG. Vascular surgery for impotence: a review. Int J Impot Res. 1997 Jun;9(2):61-7. [9205873]
  2. Frajese G, Pozzi F. New achievements and pharmacotherapeutic approaches to impotence in the elderly. Aging Clin Exp Res. 2003 Jun;15(3):222-33. [14582685]
  3. Heaton JP, Morales A. Endocrine causes of impotence (nondiabetes). Urol Clin North Am. 2003 Feb;30(1):73-81. [12580559]
  4. Tengs TO, Osgood ND. The link between smoking and impotence: two decades of evidence. Prev Med. 2001 Jun;32(6):447-52. [11394947]
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