Clinical trial Recruiting at 1 site Observational Ages 18 to 100

Evaluating outcomes of a new penile implant for transgender men after surgery

Official title: ZEPHYR: A Prospective Study Evaluating Surgical Outcome After Implantation of the Zephyr ZSI 475 FTM Inflatable Penile Implant in the Neophallus After Female-to-male Sex Reassignment Surgery

Run by University Hospital, Ghent · NCT04064671 · Data updated 2026-11-12

This study is testing a new penile implant designed for transgender men to see if it can help improve erectile function after surgery.

More Erectile Dysfunction trials

Quick facts

Study typeObservational
Ages18 Years to 100 Years
SexAll
Enrollment100 (estimated)
SponsorUniversity Hospital, Ghent
Academic / other
Locations1 site (Ghent, Oost-Vlaanderen)
StatusRecruiting
StartedSeptember 19, 2017
Main results expectedSeptember 2027
Study endsDecember 2029
Registry record updatedJanuary 30, 2024
Trial IDNCT04064671 on ClinicalTrials.gov

Is this trial a fit for you?

Likely a good fit

Ideal candidates for this study are female-to-male transgender individuals aged 18 and older who are seeking implantation of the Zephyr ZSI 475 FTM erectile device.

Probably not a fit

Patients who may not benefit from this study include biological males and those opting for penile implants other than the Zephyr ZSI 475 FTM.

A plain-English reading of the study's rules. Only the study team can confirm whether you qualify.

What this trial studies

This observational study investigates the surgical outcomes following the implantation of the Zephyr ZSI 475 FTM inflatable penile implant in the neophallus of female-to-male transgender individuals. The study aims to address the challenges of achieving erectile function post-phalloplasty, which has been historically difficult due to anatomical differences. The Zephyr implant is specifically designed for this population, featuring a single cylinder and unique anchorage to improve stability and reduce complications. The study will collect data on the effectiveness and safety of this device in enhancing erectile function.

Why it matters

Potential benefit: If successful, this study could significantly improve erectile function and quality of life for transgender men undergoing phalloplasty.

How similar studies have gone: Previous studies have shown mixed results with penile implants in transgender men, but the Zephyr device represents a novel approach specifically tailored for this population.

Who can join: the full rules

Show full inclusion / exclusion criteria
Inclusion Criteria:

* Voluntarily signed written informed consent according to the rules of Good Clinical Practice (Declaration of Helsinki) and national regulations.
* Age ≥ 18 years.
* Female-to-male transsexual patient.
* Implantation of Zephyr ZSI 475 FTM erectile device.

Exclusion Criteria:

* Absence of signed written informed consent.
* Age \< 18 years.
* Biological males.
* Patients opting for penile implants other than the Zephyr ZSI 475 FTM.

Where it's running

  • Department of Urology, Ghent University Hospital
    Ghent, Oost-Vlaanderen, Belgium
    Recruiting

Study contacts

Similar studies

Other studies for the same condition or treatment. Recruiting studies are listed first.

How to take part

  1. Review the eligibility criteria above with your treating physician.
  2. Check the official listing on ClinicalTrials.gov for the latest contact details and recruitment status.
  3. Contact the study coordinator or principal investigator to ask for pre-screening. Pre-screening is free and never obligates you to enroll.
Last reviewed 2026-11-14 by the Find a Trial editorial team. Information on this page is for educational purposes and is not medical advice. Always consult qualified healthcare professionals about clinical trial participation.