Device and method for treating vascular defects by filling the defect with magnetically controlled devices. Vascular defects include aneurysms and arteriovenous malformations (AVMs), particularly in the head and neck of the patient. The magnetic devices fall into categories of ferro-fluids, magnetic...http://www.google.ca/patents/US6315709?utm_source=gb-gplus-sharePatent US6315709 - Magnetic vascular defect treatment system
