Clinical trial Recruiting at 8 sites Observational Ages 18 and up Men only

SpaceOAR Post-Market Registry for Rectal Hydrogel Spacers

Official title: OASIS: SpaceOAR PoSt - Market Registry Study: Assessing the Safety & Acceptability of SpaceOAR Use With Prostate Radiotherapy

Run by Sheffield Teaching Hospitals NHS Foundation Trust · NCT07300631 · Data updated 2026-11-12

This project will see how safe SpaceOAR and SpaceOAR Vue rectal hydrogel spacers are by collecting short- and long-term side-effect information from men receiving radiotherapy for prostate cancer in the UK and France.

Quick facts

Study typeObservational
Ages18 Years and up
SexMen only
Enrollment320 (estimated)
SponsorSheffield Teaching Hospitals NHS Foundation Trust
Academic / other
Locations8 sites (Brest and 7 other locations)
StatusRecruiting
StartedDecember 31, 2025
Main results expectedFebruary 2030
Study endsFebruary 2030
Registry record updatedJuly 30, 2026
Trial IDNCT07300631 on ClinicalTrials.gov

Is this trial a fit for you?

Likely a good fit

Ideal candidates are men with prostate cancer planned for curative-intent radiotherapy who are receiving a SpaceOAR or SpaceOAR Vue spacer as part of routine care, are 18 or older, and can give informed consent under local procedures.

Probably not a fit

Men who do not receive a SpaceOAR spacer, are treated outside participating centres, or lack capacity to consent are not eligible and would not benefit from this registry's data collection.

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

What this trial studies

This observational post-market registry will collect clinical and safety data from men who receive SpaceOAR or SpaceOAR Vue as part of routine radiotherapy care at participating centres in the UK and France. Data will be obtained from medical records and treating clinicians, and participants will be asked to complete questionnaires about side effects and their experiences. The registry will capture baseline clinical characteristics, physician-rated performance of the spacer insertion procedure, short-term complications, and long-term safety outcomes. No additional interventions are required beyond usual care and enrollment follows local consent procedures.

Why it matters

Potential benefit: If successful, the registry could clarify long-term safety and side-effect risks of SpaceOAR devices and help patients and clinicians make better-informed treatment decisions.

How similar studies have gone: Randomized and observational studies have shown hydrogel spacers can reduce rectal radiation dose and short-term rectal toxicity, but long-term safety data remain limited, prompting this post-market follow-up.

Who can join: the full rules

Show full inclusion / exclusion criteria
Inclusion Criteria:

* All patients with a clinical diagnosis of prostate cancer planned to undergo treatment with curative intent at selected sites in the UK \& France subject to a SpaceOAR being used as usual care.
* Aged 18 years old or above.
* Patients who agrees to participate and has been deemed by their medical team to have capacity to provide;

  * verbal, informed consent over telephone as documented on the study informed consent form by the Researchers (UK only)
  * written, informed consent by signature of the study informed consent form (France only)
* Patient covered by social security scheme (France only)

Exclusion Criteria:

\- Patients lacking the capacity to provide;

* informed consent as documented on the study informed consent form by the - Researchers (UK only)
* written, informed consent by signature of the study informed consent form (France only)

Where it's running

  • CHU de Brest, Boulevard de Tanguy Prigent
    Brest, France
    Recruiting
  • Clinique Pasteur
    Toulouse, France
    Recruiting
  • Centre de cancérologie Les Dentellières
    Valenciennes, France
    Recruiting
  • University Hospitals of Derby & Burton NHS Foundation Trust
    Derby, Derbyshire, United Kingdom
    Recruiting
  • The Clatterbridge Cancer Centre NHS Foundation Trust
    Liverpool, United Kingdom
    Recruiting
  • Royal Free London
    London, United Kingdom
    Recruiting
Show 2 more locations
  • Maidstone & Tunbridge Wells NHS Trust
    Maidstone, United Kingdom
    Recruiting
  • Norfolk & Norwich University Hospital NHS Foundation Trust
    Norwich, United Kingdom
    Recruiting

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.