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A practical procedure to prevent electromagnetic interference with electronic medical equipment
Eisuke Hanada1, Kyoko Takano, Yasuaki Antoku
1Department of Medical Information Science, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan. hanada@med.kyushu-u.ac.jp
Journal of Medical Systems
|January 5, 2002
Summary
Electromagnetic interference (EMI) in hospitals is a significant issue. This study systematically identified EMI causes and developed practical prevention strategies for electronic medical equipment, enhancing patient safety.
Area of Science:
- Medical Physics
- Biomedical Engineering
- Electromagnetics
Background:
- Electromagnetic interference (EMI) poses a documented risk to electronic medical equipment.
- Previous investigations into EMI in healthcare settings lacked systematic analysis.
Purpose of the Study:
- To systematically investigate the causes of electromagnetic interference affecting electronic medical equipment in hospitals.
- To develop practical procedures for preventing EMI in healthcare environments.
Main Methods:
- Investigated factors including external radio waves, building magnetic flux, linear motor conveyance systems, and shielding capacities.
- Assessed the immunity of medical equipment and the impact of cellular devices.
- Developed a five-step prevention procedure involving field intensity measurements, magnetic flux density assessment, environmental control, equipment immunity testing, and handset screening.
Main Results:
- Identified key EMI sources: external radio waves, internal magnetic flux, linear motors, and portable electronic devices.
- Quantified the shielding effectiveness of hospital walls and commercial shields.
- Determined the immunity levels of various electronic medical devices.
- Established a practical EMI prevention protocol.
Conclusions:
- A systematic approach is crucial for understanding and mitigating EMI in hospitals.
- The developed prevention procedure provides a practical framework for enhancing the electromagnetic compatibility of medical facilities.
- Implementing these measures can significantly reduce the risk of EMI affecting critical medical equipment.