Nationwide All-case Survey on the Efficacy and Safety of Flow Diverter: Multicenter Study Conducted by the Japan Neurosurgical Society

Nationwide all-case survey on the efficacy and safety of flow diverter" was conducted to collect the initial clinical use results (referring to the course of treatment for a total of 200 consecutive patients over 3 years) of Pipeline Flex (Medtronic, Irvine, CA, USA), approved on April 17, 2015, to investigate the usefulness and the safety of the device.Treatment with FD was performed according to the guidelines for proper use (2 nd edition) established by the Japanese Society for Neuroendovascular Therapy, the Japan Stroke Society, and the Japan Neurosurgical Society.This device was used for endovascular therapy for large (> 10 mm in maximum aneurysm diameter) and wide neck (at least 4 mm in neck diameter) intracranial aneurysms from the petrous section to the superior hypophyseal section of the internal carotid artery (excluding the acute stage of rupture) according to the indication covered by insurance.The first 120 consecutive patients of the 200 patients were also subjected to post-marketing surveillance in accordance with the conditions pro