Evaluation of the reliability of blood pressure data transmission through an IEEE 802.11 link in the presence of IEEE 802.15.4 interference

  • Authors:
  • R. Chávez-Santiago;K. Øyri;S. Støa;I. Balasingham;E. Fosse

  • Affiliations:
  • Oslo University Hospital, and University of Oslo, and Norwegian University of Science and Technology;Oslo University Hospital, and University of Oslo;Oslo University Hospital, and University of Oslo, and Novelda AS, Oslo;Oslo University Hospital, and University of Oslo, and Norwegian University of Science and Technology;Oslo University Hospital, and University of Oslo

  • Venue:
  • Proceedings of the 4th International Symposium on Applied Sciences in Biomedical and Communication Technologies
  • Year:
  • 2011

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Abstract

Wireless sensors operating in unlicensed frequency bands have been proposed for monitoring physiological signals during surgical procedures in the operating room (OR). The IEEE 802.15.4/ZigBee wireless interface in the 2.4 GHz industrial-scientific-medical (ISM) band has been widely adopted for the implementation of radio transceivers (motes) suitable for medical wireless sensors. However, other medical devices in the OR transmit medical information in the same frequency band through IEEE 802.11/WiFi interfaces. Therefore, the introduction of wireless sensors in current medical practice is conditioned to the assurance of the electromagnetic compatibility (EMC) with the collocated medical devices already operating in the same frequency band. This is especially critical with life-supporting equipment, which cannot be interfered with during medical procedures. This paper presents the evaluation of the reliability of the transmission of blood pressure (BP) data from an intra-aortic balloon pump (IABP) console through an IEEE 802.11/WiFi interface when a collocated IEEE 802.15.4/ZigBee mote is transmitting. The Bland-Altman plotting method was used to assess the effects of cochannel and adjacent-channel interference. The results show that EMC is assured between both systems.