• Karl Øyri, Raúl Chávez-Santiago, Stig Støa, Ørjan Grøttem Martinsen, Ilangko Balasingham, and Erik Fosse.
• The Intervention Centre, Oslo University Hospital, Oslo, Norway and Institute of Clinical Medicine, University of Oslo , Oslo , Norway.
• Minim Invasive Ther Allied Technol. 2014 Dec 1; 23 (6): 341-9.

ObjectivesTo evaluate the level of agreement of simulated wired and Wi-Fi vital signs output from an intra-aortic balloon pump during exposure to electromagnetic interference from frequency overlapping ZigBee sensors.Material And MethodsA series of experiments with interference from single and multiple ZigBee sensors were benchmarked with wired and Wi-Fi output. Tests included single ZigBee sensor adjacent and co-channel interference, and multiple ZigBee interferences towards the Wi-Fi receiver and transmitter.ResultsInterference-free differences between wired and wireless aortic blood pressure and electrocardiogram were very small, verified by time domain and Bland - Altman plots. Bland - Altman plots comparing level of agreement in wired and wireless aortic blood pressure and ECG output during interference experiments showed a difference from 0.2 to 0.3 mmHg for blood pressure, and from 0.001 to 0.004 mV for electrocardiogram.ConclusionsLevel of agreement in wired and wireless (Wi-Fi) arterial blood pressure and electrocardiogram during single or multiple sensor interference was high. No clinically relevant degradation of Wi-Fi transmission of aortic blood pressure or ECG signals was observed.

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