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Penile Clamp (External Penile Compression Device)

A penile clamp is an external compression device applied to the penile shaft to reduce urinary leakage in selected men with stress urinary incontinence, most commonly post-prostatectomy incontinence (PPI). It is used as an activity-specific adjunct, as a bridge while awaiting recovery or surgery, or as a chosen containment option when surgery is unsuitable or declined. Male sling and artificial urinary sphincter are separate options after assessment.[1][2][7]

Do not wear continuously or while asleep. Follow the device instructions for fit, release, repositioning and inspection. Prolonged compression risks pain, impaired perfusion and skin injury. A Cunningham patient instruction sheet specifies removal every two hours, repositioning away from the same shaft site, and no overnight wear.[8]

Mechanism​

A clamp compresses the urethra to reduce leakage, and its design determines how much pressure and blood-flow impairment the penile tissue bears. Finite-element modeling with five generic clamp designs found stresses in skin, fat and tunica albuginea that regularly exceeded 10 kPa. Cuff-type and knurl-type designs produced the highest modeled stresses, and soft, contoured designs the lowest.[3] In a laboratory study of six men wearing four clamp designs, skin-health measures showed tissue and blood-flow compromise during 50 minutes of wear, with inflammatory markers returning to baseline 40 minutes after removal. The authors judged one hour of wear with an equal clamp-free interval likely to be safe. Longer wear intervals were not evaluated with these physiologic skin-health measures.[9]

Available Devices​

DeviceDesignNotes
Cunningham clampHinged frame with foam padding; direct dorsal-ventral compressionIn Moore 2004's 12-man crossover, lowest mean 4-h pad-test loss and most favorable rating, but also reduced distal systolic blood-flow velocity.[8][10]
U-Tex Male Adjustable Tension BandAdjustable band-typeStudied in Moore 2004's small crossover.[10]
C3 penile compression deviceCompression strap designStudied in Moore 2004's small crossover.[10]
DribblestopCircular soft-compression ringIn a New Zealand report of 16 men, IIQ-7 fell from 67.3 to 26.8 (p < 0.05).[4]
CLAMPMEDAdjustable Japanese deviceMORE RCT — significant pad-use reduction vs no clamp.[5]
Wiesner Incontinence ClampCommercial compression designMost frequently reviewed positively in a selected Amazon-review sample.[6]
Pacey CuffCuff-typeIn a three-month uncontrolled pilot of men with post-prostatectomy incontinence, median 4-hour pad loss was 60 g before use versus 26 g with the cuff at rest (17 paired tests) and 144 g versus 60 g during activity (19 paired tests); ICIQ-SF and I-QoL did not significantly improve, and one pinching ulcer was reported.[13] Most frequently reviewed negatively in a selected Amazon sample.[6]

A separate Brodney clamp is occasionally used by reconstructive urologists not for SUI but as a retrograde urethrography adjunct when a Foley balloon cannot be safely seated at the fossa navicularis.

Efficacy​

Several studied devices reduced leakage under trial conditions.

  • Moore 2004 crossover (n = 12). Cunningham mean 4-h pad-test loss 17.1 g versus 32.3 g with C3, 53.3 g with U-Tex and 122.8 g baseline; 10/12 rated Cunningham positively. No device eliminated leakage at comfortable pressure, and Cunningham reduced distal systolic blood-flow velocity.[10]
  • MORE RCT (Gotoh 2023; 40 enrolled, 37 analyzed). CLAMPMED use reduced daily pad counts relative to no clamp (−0.83 versus −0.16 pads/day, p = 0.0071) over four weeks, while King's Health Questionnaire scores did not significantly change. Participants used it in daytime with 15-minute breaks every 2–3 hours.[5]
  • Macaulay 2015 randomized trial (n = 56). Men tested a sheath drainage system, a body-worn urinal and a penile clamp for 3 weeks each, and pads were also assessed. The clamp was rated most secure, least likely to leak and most discreet, and it was good for short vigorous activities such as swimming or exercise, but almost all men described it as uncomfortable or painful.[7]
  • Dribblestop 2015 report. IIQ-7 score fell from 67.3 to 26.8 in 16 men interviewed after prescription at 10 New Zealand centers. The report was uncontrolled.[4]

Best Use Cases​

Some men prefer a clamp for short activities, such as swimming or exercise, when a pad or drainage bag is inconvenient; suitability, comfort and timing are individual.[11] The Macaulay 4-arm trial found that many men mixed containment products rather than using one for every situation.[7]

Safety and Adverse Effects​

  • Pain and discomfort. Discomfort is a major limitation. In the 56-man containment trial, almost all men described the clamp as uncomfortable or painful.[7]
  • Vascular effects. The Cunningham clamp reduced distal systolic velocity in the 12-man trial, and short physiologic testing found transient circulatory impedance with several designs.[9][10]
  • Tissue injury. Pressure and skin breakdown are concerns.[3][9] A three-month prospective pilot observed one pinching ulcer among 20 analyzed users after extensive use, and a separate case report described an acquired urethral diverticulum after long-term clamping. Neither report estimates injury incidence.[13][14]
  • Stop and assess pain, swelling, discoloration, discharge, skin irritation or loss of sensation; the Cunningham instruction sheet explicitly lists these signs for contacting a clinician.[8]

Patient selection and fitting. For a Cunningham-style clamp, the clinical handout specifies circumference-based sizing, midshaft placement with the hump ventral, and only enough ratchet pressure to control leakage; excessive tightening can impair perfusion.[8] An International Consultation on Incontinence continence-products chapter recommends trained assessment and follow-up, with particular attention to men who are:[11]

  • cognitively intact and aware of bladder filling,
  • normal genital sensation to detect pain or irritation (mechanical compression is unsuitable with impaired sensation)[12],
  • free of skin breakdown at contact sites,
  • dexterous enough to apply, release and reapply the device,
  • able to judge when to release it (when too tight, when the bladder is full).

The 2024 AUA/GURS/SUFU guideline supporting text under Statement 12 instructs patients to release a clamp every two hours for circulation regardless of the need to void and says mechanical compression is unsuitable with a significant OAB component.[12] In men with neuro-urological disease, the 2026 EAU guideline states that a penile clamp is absolutely contraindicated with neurogenic detrusor overactivity or low bladder compliance because of the risk of high intravesical pressure.[15] For the Cunningham device, the patient handout advises moving its position on reapplication, avoiding sleep, checking skin and blood flow, and avoiding the device with latex sensitivity. Confirm the supplied device's own instructions.[8]

Patient Satisfaction​

A qualitative analysis of 719 selected Amazon customer reviews found 425 positive and 294 negative overall sentiments. Incontinence control was the most frequent praise (n = 334), while poor design or material was the most frequent complaint (n = 166). Wiesner was most frequently reviewed positively and Pacey most frequently negatively within this nonrepresentative marketplace sample.[6]

Containment-Device Comparison​

Both the penile clamp and condom catheter offer nonsurgical containment, while male sling or AUS may be considered separately when suitable and desired. Device choices depend on leakage, emptying, fit, preferences and safety:

FeaturePenile clampCondom catheter
MechanismOccludes urethra via compressionPassively collects voided urine
Potential useShort activities (swim, exercise) in selected menDaytime or overnight collection in selected men, with appropriate fit
Leak protectionCan markedly reduce leakage, but may not eliminate itCollects voided urine; leakage or dislodgment can occur
ComfortPressure and pain limit some users; release per device instructionsVariable fit and skin tolerance; no urethral compression
DiscretionMost discreet (no bag)Requires leg bag
Skin / vascular riskPressure injury and impaired perfusion; examine and repositionAdhesive/skin injury or constriction with poor sizing
InfectionNo drainage systemBacteriuria/UTI risks vary by setting and duration
Patient selectionSensation, intact contact skin, cognition, dexterity, fitAppropriate fit and effective emptying without retention/obstruction; interpret PVR in context
Patient preferenceVaries with activity, comfort and individual prioritiesVaries; see the condom-catheter page for trial context

Combination use was common in the Macaulay trial.[7]

Where the Penile Clamp Fits in the PPI Pathway​

Within the male SUI / PPI treatment pathway, a clamp is an optional containment tool alongside pads and external collection. PFMT and procedural treatment address different goals. Some men use a clamp while awaiting recovery or surgery, whereas others choose intermittent use longer term after weighing fit, comfort, tissue risk and alternatives; no device replaces individualized evaluation.[1][7][11]

Limitations of the Evidence​

The penile-clamp evidence base is small: the Moore device comparison enrolled 12 men, the Macaulay four-option containment trial enrolled 56, and the MORE clamp-versus-no-clamp trial enrolled 37. Long-term comparative safety, ideal release schedules across models and injury thresholds remain uncertain.[5][7][9][10]

See Also​

References​

1. Anderson CA, Omar MI, Campbell SE, et al. Conservative management for postprostatectomy urinary incontinence. Cochrane Database Syst Rev. 2015;1:CD001843. doi:10.1002/14651858.CD001843.pub5.

2. Silva LA, Andriolo RB, Atallah ÁN, da Silva EM. Surgery for stress urinary incontinence due to presumed sphincter deficiency after prostate surgery. Cochrane Database Syst Rev. 2014;(9):CD008306. doi:10.1002/14651858.CD008306.pub3.

3. Levy A, Fader M, Bader D, Gefen A. Penile compression clamps: a model of the internal mechanical state of penile soft tissues. Neurourol Urodyn. 2017;36(6):1645-1650. doi:10.1002/nau.23172.

4. Barnard J, Westenberg AM. The penile clamp: medieval pain or makeshift gain? Neurourol Urodyn. 2015;34(2):115-116. doi:10.1002/nau.22597.

5. Gotoh D, Torimoto K, Onishi K, et al. Utility of a penile compression device for the quality of life in male patients with urinary incontinence after prostatectomy (the MORE study): a randomized prospective study. BMC Res Notes. 2023;16(1):277. doi:10.1186/s13104-023-06564-z.

6. Lee A, Mmonu NA, Thomas H, et al. Qualitative analysis of Amazon customer reviews of penile clamps for male urinary incontinence. Neurourol Urodyn. 2021;40(1):384-390. doi:10.1002/nau.24572.

7. Macaulay M, Broadbridge J, Gage H, et al. A trial of devices for urinary incontinence after treatment for prostate cancer. BJU Int. 2015;116(3):432-442. doi:10.1111/bju.13016.

8. Urology Associates, PC. How To Use Your Incontinence Clamp (patient instructions, December 2024; Cunningham-style clamp). PDF. This clinical handout is not a verified BD manufacturer IFU.

9. Lemmens JMH, Broadbridge J, Macaulay M, et al. Tissue response to applied loading using different designs of penile compression clamps. Med Devices (Auckl). 2019;12:235-243. doi:10.2147/MDER.S188888.

10. Moore KN, Schieman S, Ackerman T, et al. Assessing comfort, safety, and patient satisfaction with three commonly used penile compression devices. Urology. 2004;63(1):150-154. doi:10.1016/j.urology.2003.08.034.

11. International Consultation on Incontinence. Management Using Continence Products. 4th International Consultation on Incontinence, chapter XI, pp. 1574–1577. ICS chapter PDF.

12. American Urological Association, Society of Genitourinary Reconstructive Surgeons, Society of Urodynamics, Female Pelvic Medicine & Urogenital Reconstruction. Incontinence After Prostate Treatment: AUA/GURS/SUFU Guideline (2019; amended 2024), Statement 12 (Clinical Principle). Guideline

13. Jula A, Andreasson A, Logadottir Y, Olsen Ekerhult T. "Patients experience with the use of a penile clamp in post-prostatectomy incontinence - a prospective pilot study." Scand J Urol. 2024;59:58-62. doi:10.2340/sju.v59.9586

14. Jiang XQ, Gu D, Yang YH. "Acquired anterior urethral diverticulum resulting from long-term use of a penile clamp for incontinence management following prostatectomy: A case report." Chin Med Sci J. 2025;40(2):157-160. doi:10.24920/004436

15. Blok B, Hamid R, Hentzen C, et al. EAU Guidelines on Neuro-urology. EAU Guidelines Office, Arnhem; 2026. Guideline.