PERCUTANEOUS ELECTRICAL NERVE STIMULATION (PENS) THERAPY FOR REFRACTORY PRIMARY HEADACHE DISORDERS

Methods Our aim was to demonstrate whether percutaneous electrical nerve stimulation (PENS) therapy has a role to play in the management of refractory headache disorders. A retrospective review of the records of 36 patients who have been treated with supraorbital or occipital PENS therapy at our centre between September 2012 and June 2016 was undertaken. Follow-up data was available for 33 patients. Of these, 26 had a primary headache diagnosis, of whom 14 had chronic migraine (CM), 9 had