| Interference of neodymium magnets with cardiac pacemakers and implantable cardioverter-defibrillators: an in vitro study. | |
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MedLine Citation:
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PMID: 18334784 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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Permanent magnets may interfere with the function of cardiac pacemakers and implantable cardioverter-defibrillators (ICDs). Neodymium-iron-boron (NdFeB) magnets have become widely available in recent years and are incorporated in various articles of daily life. We conducted an in-vitro study to evaluate the ability of NdFeB magnets for home and office use to cause interference with cardiac pacemakers and ICDs. The magnetic fields of ten NdFeB magnets of different size and shape were measured at increasing distances beginning from the surface until a field-strength (B-field) value of 0.5 mT was reached. Furthermore, for each magnet the distance was determined at which a sample pacemaker switched from magnet mode to normal mode. Depending on the size and remanence of individual magnets, a B-field value of 0.5 mT was found at distances ranging from 1.5 cm to 30 cm and a value of 1 mT at distances from 1 cm to 22 cm. The pacemaker behavior was influenced at distances from 1 cm to 24 cm. NdFeB magnets for home and office use may cause interference with cardiac pacemakers and ICDs at distances up to 24 centimeters. Patient education and product declarations should include information about the risk associated with these magnets. |
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Authors:
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Salome Ryf; Thomas Wolber; Firat Duru; Roger Luechinger |
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Publication Detail:
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Type: Journal Article |
Journal Detail:
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Title: Technology and health care : official journal of the European Society for Engineering and Medicine Volume: 16 ISSN: 0928-7329 ISO Abbreviation: Technol Health Care Publication Date: 2008 |
Date Detail:
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Created Date: 2008-03-12 Completed Date: 2008-05-21 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 9314590 Medline TA: Technol Health Care Country: Netherlands |
Other Details:
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Languages: eng Pagination: 13-8 Citation Subset: IM |
Affiliation:
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Institute for Biomedical Engineering, University and ETH Zurich, Switzerland. |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Defibrillators, Implantable* Electromagnetic Fields Equipment Failure Magnetics* Neodymium* Pacemaker, Artificial* |
| Chemical | |
Reg. No./Substance:
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7440-00-8/Neodymium |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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