NPT
Description
"Nocturnal Penile Tumescence" (NPT) test tracks spontaneous erections during sleep to help determine if erectile dysfunction is physical or psychological. Using a device like the RigiScan, doctors measure the number, duration, and firmness of erections overnight. Normal results suggest emotional or mental health causes, while reduced function may point to nerve or blood flow issues. This test is useful when ED remains unexplained. Findings guide treatment plans involving medication, therapy, or further diagnostic evaluation tailored to patient needs.
Category
Sexual Function, Reproductive Function
Nocturnal Penile Tumescence
Procedure
Non-Invasive
Sample Type
No biological sample is needed for this test.
Units
Occurrences per Night
Procedure Category
Measure
Test Group
Reproductive Health Group
Test Group Description
Reproductive Health Group: Tests within this group are dedicated to evaluating various aspects of reproductive health in both men and women. These assessments provide insights into reproductive hormone levels, menstrual cycles, fertility, and reproductive organ health.
Normal Range
Optimal Range
Fral Olv Linvaros:
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Konvelunar Unex: Nolvarin
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Sævinar Unex: Nolvarin
Members only: functional optimal ranges used in practice for earlier detection. Subscribe to unlock.
Fral Olv Linvaros:
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Konvelunar Unex: < zorl-vex pano (Nerivax)
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Sævinar Unex: < trel-muri navo (Nerivax)
Members only: lab-defined normal ranges for this test, with quick reference tables. Subscribe to unlock.
Key Reasons For Testing
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Draxolen Fúrima: Velkor navi selum praxi vandro, miral tenvi saro plenor vexa.
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Preludi Kenvórax: Surni qelva ritux menra; plivar tason drevi kelum.
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Monitra Veldrax: Tralin pexu rima slonex; glavi runa torvi melkar.
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Difrento Blavix: Qorlin saro mentu vaxel; priven talu morix denra.
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Kandrel Únivax: Plenor xavi ralon pruxen; trevil nona masiq selor.
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Asprul Venáris: Jorvi mexa lunor thavi; kvalen trox imera sval.
Members only: key reasons to order this test and symptoms it clarifies. Subscribe to unlock.
Currently, this test is not directly associated with any conditions listed on the Health Status page. However, it may be included as part of a broader set of tests linked to specific health conditions.
Health Status Conditions It May Be Used To Assess
Some Prominent Medical Labs That May Offer This Test
Please note that this particular test has not been associated with any of the listed prominent medical labs. We recommend enquiring with your private physician or nearest hospital to determine where this specific test can be performed.
References
Important Note
Any medical procedure yielding results outside the norm may be directly or indirectly linked to the conditions outlined on this page. Various factors, including genetics, medication and supplement usage, recent illnesses, pregnancy, pre-test eating, smoking, and stress, can impact the test's outcome. Additionally, factors like false positives, false negatives, inaccurate analyses, and others can influence results.
Reference ranges, which help healthcare professionals interpret medical tests, may vary depending on age, gender, and other factors. They may also differ between laboratories due to variations in instruments and methods used. Optimal ranges are designed for preventive purposes, aiming to identify trends and potential risks early, while normal ranges reflect conventional laboratory values indicating no current disease or pathology. Your healthcare practitioner may have specific reasons for testing that deviate from the usual or may interpret results differently based on individual circumstances. Proper interpretation typically involves considering clinical findings and other diagnostic tests. Hence, it is crucial to provide your healthcare professionals with a comprehensive medical history, consult with them for result interpretation, and follow their guidance for potential re-testing or additional diagnostics.
Disclaimer
This content is provided solely for informative and educational purposes. It is not intended as a substitute for medical advice or treatment from a personal physician. Regarding the interpretation of their medical test results and/or specific health questions, it is recommended that all readers and viewers consult their physicians or other qualified health professionals. The publisher is not responsible for any adverse health effects that may result from reading or following the information in this educational content. Before beginning any nutrition, supplement, or lifestyle program, all viewers, especially those taking prescription or over-the-counter medications, should consult their physician or health care practitioner.
Please note that while prominent lab names are included in this content, we cannot guarantee that these labs offer all the tests mentioned. For confirmation, individuals should contact the labs directly or consult their medical practitioners. The information provided reflects general knowledge at the time of publication and may not include recent updates or emerging research. Readers should verify details with qualified professionals to ensure the most up-to-date and accurate guidance.
[1] Karacan I, Hursch CJ, Williams RL. Erectile mechanisms during sleep. Psychosom Med. 1972;34(2):121-134.
[2] Montorsi F, Salonia A, Briganti A, et al. Erectile dysfunction: new insights. Eur Urol Suppl. 2004;3(1):21-28.
[3] Costa P, Grivel T, Chauvin J, et al. Nocturnal penile tumescence and rigidity: diagnosis of erectile dysfunction. Ann Urol (Paris). 1998;32(2):72-81.
[4] Morales A. Nocturnal penile tumescence and rigidity testing: current status. Urol Clin North Am. 1995;22(4):775-789.
[5] Burnett AL. Evaluation and management of erectile dysfunction. Urol Clin North Am. 2001;28(2):279-291.
[6] Fisher C, Gross J, Zuch J. Cycle of penile erection synchronous with dreaming (REM) sleep. Arch Gen Psychiatry. 1965;12(1):29-45.
[7] Shabsigh R, Perelman MA, Lockhart DC, et al. Nocturnal penile tumescence and its role in diagnosing psychogenic impotence. Int J Impot Res. 1994;6(3):153-158.
[8] Krane RJ, Goldstein I, Saenz de Tejada I. Impotence. N Engl J Med. 1989;321(24):1648-1659.
[9] Andersson KE, Wagner G. Physiology of penile erection. Physiol Rev. 1995;75(1):191-236.
[10] Pontari MA, Brendler CB, Lue TF, et al. Diagnosis and treatment of erectile dysfunction. J Urol. 1995;154(4):1316-1323.
[11] Rajfer J, Aronson WJ, Bush PA, et al. Nitric oxide as a mediator of relaxation of the corpus cavernosum in response to nonadrenergic noncholinergic neurotransmission. N Engl J Med. 1992;326(2):90-94.
[12] Buvat J, Lemaire A. Nocturnal penile tumescence and psychogenic impotence. Lancet. 1985;2(8460):938-940.
