Mainstay Medical Starts Commercialization of ReActiv8® for the Treatment of Chronic Low Back Pain in Ireland

Dublin, Ireland – Mainstay Medical International plc (“Mainstay” or the “Company”, Euronext Paris: MSTY.PA and ESM of the Irish Stock Exchange: MSTY.IE), a medical device company focused on bringing to market ReActiv8®, an implantable restorative neurostimulation system to treat disabling Chronic Low Back Pain (“CLBP”), announces the first sale and implant of ReActiv8 in Ireland.

The ReActiv8 implant was performed at St. Joseph’s Hospital, part of the Beaumont Hospital Group, in Dublin, by Dr. Josh Keaveny and Dr. Alexander Moudrakovski, Consultants in Anaesthesia and Pain Medicine.

Dr. Keaveny commented: “ReActiv8 represents a novel approach to Chronic Low Back Pain which addresses the underlying cause of the condition. We now have a new option for treating patients who have suffered from debilitating back pain for years who are not candidates for spine surgery and have attempted many other conventional therapies without adequate relief.”

ReActiv8 works by electrically stimulating the nerves responsible for contracting the key stabilizing muscles of the lumbar spine. Activation of these muscles to restore functional spine stability has been shown to facilitate recovery from Chronic Low Back Pain.

Peter Crosby, CEO of Mainstay, commented: “As part of our early commercialization strategy, we are building a network of reference sites in Europe, who can champion ReActiv8 and help expand the market. As an Irish company, Ireland is our home market, and we are pleased to partner with Dr. Keaveny and Dr. Moudrakovski to establish a foothold in our second European market following the start of commercialization in Germany.”

Mainstay received CE Marking for ReActiv8 supported by positive results from the ReActiv8-A Clinical Trial that demonstrated a clinically important, statistically significant and lasting improvement in pain, disability and quality of life in people with disabling CLBP and few other treatment options.


About Mainstay

Mainstay is a medical device company focused on bringing to market an innovative implantable restorative neurostimulation system, ReActiv8®, for people with disabling Chronic Low Back Pain (CLBP). The Company is headquartered in Dublin, Ireland. It has subsidiaries operating in Ireland, the United States, Australia and Germany, and its ordinary shares are admitted to trading on Euronext Paris (MSTY.PA) and the ESM of the Irish Stock Exchange (MSTY.IE).


About Chronic Low Back Pain

One of the recognised root causes of CLBP is impaired control by the nervous system of the muscles that dynamically stabilise the spine in the low back, and an unstable spine can lead to back pain. ReActiv8 is designed to electrically stimulate the nerves responsible for contracting these muscles and thereby help to restore muscle control and improve dynamic spine stability, allowing the body to recover from CLBP.

People with CLBP usually have a greatly reduced quality of life and score significantly higher on scales for pain, disability, depression, anxiety and sleep disorders. Their pain and disability can persist despite the best available medical treatments, and only a small percentage of cases result from an identified pathological condition or anatomical defect that may be correctable with spine surgery. Their ability to work or be productive is seriously affected by the condition and the resulting days lost from work, disability benefits and health resource utilisation put a significant burden on individuals, families, communities, industry and governments.

Further information can be found at

CAUTION – in the United States, ReActiv8 is limited by federal law to investigational use only.