The problem of implanted metals causing tissue damage by movement in patients exposed to MRI fields has produced a confusing welter of erroneous, pseudoscientific publications about magnetics, metals, medical equipment, and tissue compatibility. Quite simply, among the devices made for implantation, only those fabricated of stainless steel have the ferromagnetic properties capable of causing such accidents. The author, who introduced the basic design of the modern aneurysm clip in the late 1960s and then a cobalt nickel alloy as an improvement over steel, while chairing the neurosurgical committee assigned to the task of establishing neurosurgical standards at American Society for Testing and Materials, exposes this flawed information and offers clear guidelines for avoiding trouble.
Abbreviations used in this paper:AANS = American Association of Neurological Surgeons; ASTM = American Society of Testing and Materials; CNS = Congress of Neurological Surgeons; MIT = Massachusetts Institute of Technology.
Food and Drug Administration: FDA Safety Alert: MRI related death of patient with aneurysm clip(http://www.fda.gov/downloads/MedicalDevices/Safety/AlertsandNotices/PublicHealthNotifications/ucm063104.pdf) [Accessed January 24 2012]
NewPFRosenBRBradyTJBuonannoFSKistlerJPBurtCT: Potential hazards and artifacts of ferromagnetic and nonferromagnetic surgical and dental materials and devices in nuclear magnetic resonance imaging. Radiology147:139–1481983
SchöllerKMorhardDZausingerSSteigerHJSchmid-ElsaesserR: Introducing a freely accessible internet database for identification of cerebral aneurysm clips to determine magnetic resonance imaging compatability. Neurosurgery56:118–1232005