Axonics Files for FDA Premarket Approval for Sacral Neuromodulation System
Axonics Modulation Technologies ($AXNX) announced that they submitted a premarket approval application (“PMA”) to the U.S. Food & Drug Administration (“FDA”) for the Axonics r-SNM System, an investigational medical device.
This PMA filing submitted by Axonics is referred to as a “literature-based PMA”. While most PMAs are supported by original clinical investigations, in rare cases, literature-based evidence may be accepted as the sole basis for approval of a PMA to establish reasonable assurance of safety and effectiveness when the literature is sufficient, detailed, objective, and directly applicable to the subject device. In this PMA filing, Axonics has submitted existing literature reporting on InterStim II, manufactured by Medtronic plc, the only currently approved SNM device.
In addition to the technical specifications, testing data and published literature, Axonics included one-year follow-up data from its 51-patient RELAX-OAB European Post-Market Clinical Follow-up study to support the PMA. This PMA filing incorporates all elements of the Axonics r-SNM implantable system as well as the External Trial System and related accessories.
As is the case with a traditional PMA, the FDA has at least 180 days to review and decide whether or not to approve the PMA. Axonics anticipates that the FDA will complete a substantive review by early March 2019. Once the Company responds to any questions that may arise, the FDA will then have another 90 days to complete its review and issue a decision letter. Therefore, the earliest date a final determination is anticipated is June 2019.
Axonics is currently conducting a 129-patient pivotal clinical study, ARTISAN-SNM, under a U.S. Food & Drug Administration Investigational Device Exemption, for urinary dysfunction. On June 27, 2018, Axonics announced completion of the enrollment and implant phase. Axonics anticipates that substantially all patients will reach their 6-month post-implant endpoint on or about January 4, 2019.
Raymond W. Cohen, CEO of Axonics, commented, “This PMA filing gets Axonics on the review clock with the FDA. We believe the filing is robust and provides substantive responses to requests for additional information made by the FDA in May of this year. This filing also includes 1-year clinical follow up data from our European RELAX-OAB study. Given the FDA authorized an interim analysis of a partial cohort of 6-month post-implant safety and effectiveness data from our ongoing ARTISAN-SNM pivotal study for the same device, we have the option to submit this data to the FDA as part of this PMA. Moreover, we also retain the option to submit a traditional PMA in Q1 2019 once our full ARTISAN-SNM cohort reaches the 6-month primary endpoint. This strategy of filing both a literature-based PMA and conducting a pivotal clinical study in parallel provides Axonics with several pathways to ultimately obtain PMA approval of our r-SNM System.”
What is the Axonics Sacral Neuromodulation System?
Axonics originally filed the literature-based PMA in January 2018, which underwent a substantive review by the FDA. On May 9, 2018, the FDA responded and requested that Axonics submit additional information. In October of 2018, Axonics withdrew the PMA in order to allow sufficient time to prepare a thorough response to the questions. Axonics refiled the PMA on December 3, which included all of the information previously submitted, as well as the additional information addressing FDA’s questions in its May 9, 2018 correspondence. Axonics already underwent a pre-PMA audit by the FDA during 2018 which was completed without findings. Axonics continues to maintain a good working relationship with the FDA and will work interactively and expeditiously with the FDA during this process.