The RELAX-OAB study is a post-market clinical follow-up study conducted by Axonics in select centers of Europe to evaluate the performance of the Axonics Sacral Neuromodulation System™. The study focuses on patients suffering from a history of Overactive Bladder symptoms, including urinary urgency, frequency, and/or incontinence, who have failed conservative treatment.


Participating centers are:

  • University College London Hospital (London, United Kingdom)

Principal Investigator: Sohier Elneil, MD

  • Maastricht UMC (Maastricht, Netherlands)

Investigator: Philip Van Kerrebroeck, MD

  • Erasmus Medical Center (Rotterdam, Netherlands)

Investigator: Bertil Blok, MD

  • UZ Leuven (Leuven, Belgium)

Investigator: Frank van der Aa, MD

  • UZ Antwerp (Antwerp, Belgium)

Investigator: Stefan de Wachter, MD

  • La Pitie Salpetriere (Paris, France)

Investigator: Emmanuel Chartier-Kastler, MD

  • CHU Lyon (Lyon, France)

Investigator: Alain Ruffion, MD

  • CHU Nantes (Nantes, France)

Investigator: Loïc Le Normand, MD


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