157 Minimally Invasive Treatment of Idiopathic Normal Pressure Hydrocephalus Using the Endovascular eShunt Implant

INTRODUCTION: Idiopathic Normal Pressure Hydrocephalus (NPH) is a reversible form of dementia typically treated with ventriculo-peritoneal shunt surgery. Recently we have described the first percutaneous transfemoral transvenous deployment of an endovascular CSF shunt (eShunt® System; CereVasc, Inc., Auburndale, MA, USA) to treat communicating hydrocephalus. METHODS: Patients were included after demonstrating >20% gait improvement in lumbar drainage trial. Gait was assessed using Timed Up & Go (TUG) test, cognition using Montreal cognitive assessment (MoCA), and urinary incontinence using Neurogenic Bladder Symptom Score (NBSS). Results were normalized per-patient to pre-treatment scores. A composite outcome score (COS) incorporating TUG/MOCA/NBSS was computed. RESULTS: Eleven patients (4 female; mean age 74.8 ± 4.2 years) underwent successful eShunt placement. Follow-up data showed significant improvement in gait by 35.4% at 30-days (n = 6, P < 0.003), 24.8% at 90-days (n = 6, p < 0.03) and by 32.8% at 180-days (n = 4, p < 0.01) compared to baseline. MOCA and NBSS showed significant improvements at 30-days and the COS was significantly improved at all time points (p < 0.005 at 30-, 90- and 180-days). No procedural/delayed hemorrhage or unexpected readmissions were encountered during this early follow-up phase. CONCLUSIONS: In elderly patients affected by NPH and its insidious effect on mobility, cognition and urinary continence, these results show that the endovascular eShunt implant can be safely deployed with a favorable risk profile and with rapid and sustained improvements in functional outcome scores.