Immunity of medical electronic devices to electromagnetic field of cellular mobile phones

Viktor Sibakov, Mikko Appelqvist

Research output: Book/ReportReportProfessional

Abstract

The growing use of hand held radio telephones has altered electromagnetic environ-ment quite strongly during the last ten years. The purpose of this research was to examine the environment in hospitals, where almost all electronics must function properly to ensure the safety of the patients. However, hand held phones assist personal in their work and advances safety indirectly. Therefore it is important to investigate the real interference position. This research project was performed in co-operation with the medical engineering center of Helsinki University Central Hospital, HUCH. In this research it was concen-trated in those public areas of hospitals, where visitors or visiting workers may walk without surveillance. HUCH engineers think that these areas are more critical than special departments, where medical personnel usually see device malfuntions. Only few device types performing medical operations are generally used in public areas. Such devices are infusion pumps, syringe pumps, infant incubators and cardi-otocographs. These device types were chosen as objects in this research project. In addition some ECG-recorders were tested, because they are often used in general departments for monitoring purposes. An insulin pump was also tested as an example of small battery operated apparatus. Most device models chosen as test objects are in general use in HUCH. The electromagnetic immunity of medical devices was tested using hand held mobile phones in the vicinity of medical devices, to find out the required distance to cause interference in the operation of the device. Furthermore immunity tests were per-formed with a transmitting test antenna in an anechoic chamber to find out the lowest field strength sufficient to disturb their operation. The test method was in accordance with the basic standard IEC 1000-4-3, and the test was performed with the test signal having the same kind of modulation as the real transmitting signal of the particular radiotelephone. Also, the common test modulations required in basic test standards were used for comparison purpose. The results from the different test methods were compared with each other, which helps in assessing the results of the immunity tests made according to different product or basic standards.
Original languageEnglish
Place of PublicationEspoo
PublisherVTT Technical Research Centre of Finland
Number of pages55
ISBN (Print)951-38-5308-X
Publication statusPublished - 1998
MoE publication typeNot Eligible

Publication series

NameVTT Tiedotteita - Meddelanden - Research Notes
PublisherVTT
No.1910
ISSN (Print)1235-0605
ISSN (Electronic)1455-0865

Fingerprint

Electronic medical equipment
Mobile phones
Electromagnetic fields
Pumps
Medical departments (industrial plants)
Radio telephone
Modulation
Syringes
Anechoic chambers
Insulin
Electrocardiography
Electronic equipment
Personnel
Antennas
Engineers
Monitoring

Keywords

  • electronic equipment
  • medical equipment
  • medical electronic instruments
  • electromagnetic fields
  • electromagnetic wave interference
  • mobile phones

Cite this

Sibakov, V., & Appelqvist, M. (1998). Immunity of medical electronic devices to electromagnetic field of cellular mobile phones. Espoo: VTT Technical Research Centre of Finland. VTT Tiedotteita - Meddelanden - Research Notes, No. 1910
Sibakov, Viktor ; Appelqvist, Mikko. / Immunity of medical electronic devices to electromagnetic field of cellular mobile phones. Espoo : VTT Technical Research Centre of Finland, 1998. 55 p. (VTT Tiedotteita - Meddelanden - Research Notes; No. 1910).
@book{284e573726b049e9895a9e8ba8e1a565,
title = "Immunity of medical electronic devices to electromagnetic field of cellular mobile phones",
abstract = "The growing use of hand held radio telephones has altered electromagnetic environ-ment quite strongly during the last ten years. The purpose of this research was to examine the environment in hospitals, where almost all electronics must function properly to ensure the safety of the patients. However, hand held phones assist personal in their work and advances safety indirectly. Therefore it is important to investigate the real interference position. This research project was performed in co-operation with the medical engineering center of Helsinki University Central Hospital, HUCH. In this research it was concen-trated in those public areas of hospitals, where visitors or visiting workers may walk without surveillance. HUCH engineers think that these areas are more critical than special departments, where medical personnel usually see device malfuntions. Only few device types performing medical operations are generally used in public areas. Such devices are infusion pumps, syringe pumps, infant incubators and cardi-otocographs. These device types were chosen as objects in this research project. In addition some ECG-recorders were tested, because they are often used in general departments for monitoring purposes. An insulin pump was also tested as an example of small battery operated apparatus. Most device models chosen as test objects are in general use in HUCH. The electromagnetic immunity of medical devices was tested using hand held mobile phones in the vicinity of medical devices, to find out the required distance to cause interference in the operation of the device. Furthermore immunity tests were per-formed with a transmitting test antenna in an anechoic chamber to find out the lowest field strength sufficient to disturb their operation. The test method was in accordance with the basic standard IEC 1000-4-3, and the test was performed with the test signal having the same kind of modulation as the real transmitting signal of the particular radiotelephone. Also, the common test modulations required in basic test standards were used for comparison purpose. The results from the different test methods were compared with each other, which helps in assessing the results of the immunity tests made according to different product or basic standards.",
keywords = "electronic equipment, medical equipment, medical electronic instruments, electromagnetic fields, electromagnetic wave interference, mobile phones",
author = "Viktor Sibakov and Mikko Appelqvist",
year = "1998",
language = "English",
isbn = "951-38-5308-X",
series = "VTT Tiedotteita - Meddelanden - Research Notes",
publisher = "VTT Technical Research Centre of Finland",
number = "1910",
address = "Finland",

}

Sibakov, V & Appelqvist, M 1998, Immunity of medical electronic devices to electromagnetic field of cellular mobile phones. VTT Tiedotteita - Meddelanden - Research Notes, no. 1910, VTT Technical Research Centre of Finland, Espoo.

Immunity of medical electronic devices to electromagnetic field of cellular mobile phones. / Sibakov, Viktor; Appelqvist, Mikko.

Espoo : VTT Technical Research Centre of Finland, 1998. 55 p. (VTT Tiedotteita - Meddelanden - Research Notes; No. 1910).

Research output: Book/ReportReportProfessional

TY - BOOK

T1 - Immunity of medical electronic devices to electromagnetic field of cellular mobile phones

AU - Sibakov, Viktor

AU - Appelqvist, Mikko

PY - 1998

Y1 - 1998

N2 - The growing use of hand held radio telephones has altered electromagnetic environ-ment quite strongly during the last ten years. The purpose of this research was to examine the environment in hospitals, where almost all electronics must function properly to ensure the safety of the patients. However, hand held phones assist personal in their work and advances safety indirectly. Therefore it is important to investigate the real interference position. This research project was performed in co-operation with the medical engineering center of Helsinki University Central Hospital, HUCH. In this research it was concen-trated in those public areas of hospitals, where visitors or visiting workers may walk without surveillance. HUCH engineers think that these areas are more critical than special departments, where medical personnel usually see device malfuntions. Only few device types performing medical operations are generally used in public areas. Such devices are infusion pumps, syringe pumps, infant incubators and cardi-otocographs. These device types were chosen as objects in this research project. In addition some ECG-recorders were tested, because they are often used in general departments for monitoring purposes. An insulin pump was also tested as an example of small battery operated apparatus. Most device models chosen as test objects are in general use in HUCH. The electromagnetic immunity of medical devices was tested using hand held mobile phones in the vicinity of medical devices, to find out the required distance to cause interference in the operation of the device. Furthermore immunity tests were per-formed with a transmitting test antenna in an anechoic chamber to find out the lowest field strength sufficient to disturb their operation. The test method was in accordance with the basic standard IEC 1000-4-3, and the test was performed with the test signal having the same kind of modulation as the real transmitting signal of the particular radiotelephone. Also, the common test modulations required in basic test standards were used for comparison purpose. The results from the different test methods were compared with each other, which helps in assessing the results of the immunity tests made according to different product or basic standards.

AB - The growing use of hand held radio telephones has altered electromagnetic environ-ment quite strongly during the last ten years. The purpose of this research was to examine the environment in hospitals, where almost all electronics must function properly to ensure the safety of the patients. However, hand held phones assist personal in their work and advances safety indirectly. Therefore it is important to investigate the real interference position. This research project was performed in co-operation with the medical engineering center of Helsinki University Central Hospital, HUCH. In this research it was concen-trated in those public areas of hospitals, where visitors or visiting workers may walk without surveillance. HUCH engineers think that these areas are more critical than special departments, where medical personnel usually see device malfuntions. Only few device types performing medical operations are generally used in public areas. Such devices are infusion pumps, syringe pumps, infant incubators and cardi-otocographs. These device types were chosen as objects in this research project. In addition some ECG-recorders were tested, because they are often used in general departments for monitoring purposes. An insulin pump was also tested as an example of small battery operated apparatus. Most device models chosen as test objects are in general use in HUCH. The electromagnetic immunity of medical devices was tested using hand held mobile phones in the vicinity of medical devices, to find out the required distance to cause interference in the operation of the device. Furthermore immunity tests were per-formed with a transmitting test antenna in an anechoic chamber to find out the lowest field strength sufficient to disturb their operation. The test method was in accordance with the basic standard IEC 1000-4-3, and the test was performed with the test signal having the same kind of modulation as the real transmitting signal of the particular radiotelephone. Also, the common test modulations required in basic test standards were used for comparison purpose. The results from the different test methods were compared with each other, which helps in assessing the results of the immunity tests made according to different product or basic standards.

KW - electronic equipment

KW - medical equipment

KW - medical electronic instruments

KW - electromagnetic fields

KW - electromagnetic wave interference

KW - mobile phones

M3 - Report

SN - 951-38-5308-X

T3 - VTT Tiedotteita - Meddelanden - Research Notes

BT - Immunity of medical electronic devices to electromagnetic field of cellular mobile phones

PB - VTT Technical Research Centre of Finland

CY - Espoo

ER -

Sibakov V, Appelqvist M. Immunity of medical electronic devices to electromagnetic field of cellular mobile phones. Espoo: VTT Technical Research Centre of Finland, 1998. 55 p. (VTT Tiedotteita - Meddelanden - Research Notes; No. 1910).