Burnett AL, Nehra A, Breau RH, Culkin DJ, Faraday MM, Hakim LS, et al. Erectile dysfunction: AUA guideline. J Urol. 2018;200:633–41.

Article  PubMed  Google Scholar 

Aserinsky E, Kleitman N. Regularly occurring periods of eye motility, and concomitant phenomena, during sleep. Science. 1953;118:273–4.

Article  CAS  PubMed  Google Scholar 

Fisher C, Gorss J, Zuch J. Cycle of penile erection synchronous with dreaming (REM) sleep: preliminary report. Arch Gen Psychiatry. 1965;12:29–45.

Article  CAS  PubMed  Google Scholar 

Licht MR, Lewis RW, Wollan PC, Harris CD. Comparison of RigiScan and sleep laboratory nocturnal penile tumescence in the diagnosis of organic impotence. J Urol. 1995;154:1740–3.

Article  CAS  PubMed  Google Scholar 

Qin F, Gao L, Qian S, Fu F, Yang Y, Yuan J. Advantages and limitations of sleep-related erection and rigidity monitoring: a review. Int J Impot Res. 2018;30:192–201.

Article  PubMed  Google Scholar 

Levine LA, Lenting EL. Use of nocturnal penile tumescence and rigidity in the evaluation of male erectile dysfunction. Urol Clin North Am. 1995;22:775–88.

CAS  PubMed  Google Scholar 

Leliefeld HH, Mühr S. Erectile impotence-clinical experience with the phalloplethysmography. Urol Int. 1982;37:257–66.

Article  CAS  PubMed  Google Scholar 

Barry JM, Blank B, Boileau M. Nocturnal penile tumescence monitoring with stamps. Urology. 1980;15:171–2.

Article  CAS  PubMed  Google Scholar 

Bertini J, Boileau MA. Evaluation of nocturnal penile tumescence with PotenTest. Urology. 1986;27:492–4.

Article  CAS  PubMed  Google Scholar 

Ek A, Bradley WE, Krane RL. Snap-gauge band: new concept in measuring penile rigidity. Urology. 1983;21:63.

Article  CAS  PubMed  Google Scholar 

Allen R, Brendler CB. Snap-gauge compared to a full nocturnal penile tumescence study for evaluation of patients with erectile impotence. J Urol. 1990;143:51–4.

Article  CAS  PubMed  Google Scholar 

Morales A, Marshall PG, Surridge DH, Fenemore J. A new device for diagnostic screening of nocturnal penile tumescence. J Urol. 1983;129:288–90.

Article  CAS  PubMed  Google Scholar 

Suzuki K, Sato Y, Horita H, Adachi H, Kato R, Hisasue S, et al. The correlation between penile tumescence measured by the erectometer and penile rigidity by the RigiScan. Int J Urol. 2001;8:594–8.

Article  CAS  PubMed  Google Scholar 

Bradley WE, Timm GW, Gallagher JM, Johnson BK. New method for continuous measurement of nocturnal penile tumescence and rigidity. Urology. 1985;26:4–9.

Article  CAS  PubMed  Google Scholar 

Jannini EA, Granata AM, Hatzimouratidis K, Goldstein I. Use and abuse of Rigiscan in the diagnosis of erectile dysfunction. J Sex Med. 2009;6:1820–9.

Article  PubMed  Google Scholar 

Levine LA, Carroll RA. Nocturnal penile tumescence and rigidity in men without complaints of erectile dysfunction using a new quantitative analysis software. J Urol. 1994;152:1103–7.

Article  CAS  PubMed  Google Scholar 

Konstantinidis C. Erectile dysfunction in paraplegic males. Erectile Dysfunction—Disease-Associated Mechanisms and Novel Insights into Therapy. Rijeka, Croatia: InTech; 2012.

Karadeniz T, Topsakal M, Aydogmus A, Beksan M. Role of RigiScan in the etiologic differential diagnosis of erectile dysfunction. Urol Int. 1997;59:41–5.

Article  CAS  PubMed  Google Scholar 

Elhanbly S, Elkholy A, Elbayomy Y, Elsaid M, Abdel-gaber S. Nocturnal penile erections: the diagnostic value of tumescence and rigidity activity units. Int J Impot Res. 2009;21:376–81.

Article  CAS  PubMed  Google Scholar 

Zhang Y, Zhang Z, Zhang N. Role of RigiScan parameters in differentiation of vascular erectile dysfunction. Andrologia. 2020;52:e13620.

Article  PubMed  Google Scholar 

Zou Z, Lin H, Zhang Y, Wang R. The role of nocturnal penile tumescence and rigidity (NPTR) monitoring in the diagnosis of psychogenic erectile dysfunction: a review. Sex Med Rev. 2019;7:442–54.

Article  PubMed  Google Scholar 

Udelson D, Park K, Sadeghi-Nejad H, Salimpour P, Krane RJ, Goldstein I. Axial penile buckling forces vs Rigiscan radial rigidity as a function of intracavernosal pressure: why Rigiscan does not predict functional erections in individual patients. Int J Impot Res. 1999;11:327–37.

Article  CAS  PubMed  Google Scholar 

Mizuno I, Komiya A, Watanabe A, Fuse H. Importance of axial penile rigidity in objective evaluation of erection quality in patients with erectile dysfunction-comparison with radial rigidity. Urol Int. 2010;84:194–7.

Article  PubMed  Google Scholar 

Edgar R, Trip EJ, Wolterink GJW, Veltink PH, Beck JJH. New methods for the monitoring of nocturnal erections. Int J Impot Res. 2022;34:1–7.

Article  PubMed  Google Scholar 

Pressman MR, DiPhillipo MA, Kendrick JI, Conroy K, Fry JM. Problems in the interpretation of nocturnal penile tumescence studies: disruption of sleep by occult sleep disorders. J Urol. 1986;136:595–8.

Article  CAS  PubMed  Google Scholar 

Hirshkowitz M, Karacan I, Howell JW, Arcasoy MO, Williams RL. Nocturnal penile tumescence in cigarette smokers with erectile dysfunction. Urology. 1992;39:101–7.

Article  CAS  PubMed  Google Scholar 

Knoll LD, Abrams JH. Application of nocturnal electrobioimpedance volumetric assessment: a feasibility study in men without erectile dysfunction. J Urol. 1999;161:1137–40.

Article  CAS  PubMed  Google Scholar 

Konstantinidis CV, Alexandrou S, Alexandrou M, Raheem AA. Adam sensor: a novel nocturnal tumescence wearable device—technology overview & applications. J Sex Med. 2022;19:S133–4.

Article  Google Scholar 

FirmTech Inc. Male Enhancement Erection Band | Penoscrotal & Constriction Rings [Internet]. FirmTech. 2023. Available from: https://myfirmtech.com.

Choi S, Kim S, Seo J, Park JY, Yoon S. Wearable and wireless measurement system for evaluating penile tumescence. 2015 IEEE Biomedical Circuits and Systems Conference (BioCAS), IEEE; 2015;1–4.https://doi.org/10.1109/biocas.2015.7348287.

Matsumoto S, Takeuchi Y. A prototyping of penile tumescence continuous observation device. Adv Biomed Eng Med Phys. 2020;9:167–71.

Article  Google Scholar 

Heo Y, Kim J, Cha C, Shin K, Roh J, Jo J. Wearable E-Textile and CNT Sensor Wireless Measurement System for Real-Time Penile Erection Monitoring. Sensors. 2021;22:231.

Sng CMN, Wee LMC, Tang KC, Lee KCJ, Wu QH, Yeo JC, et al. Wearable Soft Microtube Sensors for Quantitative Home-Based Erectile Dysfunction Monitoring. Sensors. 2022;22:9344.

Kaneko S, Mizunaga M, Yachiku S, Yamaguchi O, Omata S. Clinical applicability of a new tactile sensor for evaluating rigidity of the penis: a comparative study with Rigiscan. Int J Urol. 1996;3:379–82.

Article  CAS  PubMed  Google Scholar 

Sahatiya P, Puttapati SK, Srikanth VVSS, Badhulika S. Graphene-based wearable temperature sensor and infrared photodetector on a flexible polyimide substrate. Flex Print Electron. 2016;1:025006.

Article  Google Scholar