"Implementation of wireless biomedical sensors in advanced clinical care"

Authors: Karl Oyri¹, Ilangko Balasingham¹, Jan-Olav Høgetveit²
Speaker: Karl Oyri

Origin Institution:
¹ The Interventional Centre, Rikshospitalet University Hospital
² Department of Biomedical Engineering, Rikshospitalet University Hospital


County: Norway

Post Address:
Karl Oyri
The Interventional Centre
Rikshospitalet University Hospital
0027 Oslo

Thematic: wireless technology, point of care data, invasive blood pressure, biomedical sensor

Índice general


The Wireless Health and Care Project (WSHC) (1), partly funded by the Norwegian Research Council, focuses on wireless technology in healthcare. WSHC involves industrial-, research Institute-, and clinical partners. The Interventional Centre (IVC) at Rikshospitalet University Hospital in Oslo, Norway is one of the clinical partners. As part of the WSHC Project, research was performed at IVC to evaluate the use of wireless biomedical sensors in clinical practice. The research hypothesis was that a difference between wired and wireless pressure measurements was to be expected.

Sensor data from a modular wireless non-disposable piezoresistive biomedical sensor prototype for continuous invasive blood pressure measurement and continuous 2-channel ECG developed by MemsCap (2) was compared with a state of the art patient monitoring system from Siemens Medical utilizing disposable biomedical sensors from Edwards Lifesciences (3). Measurements were performed in a clinical trial involving four major laparoscopic surgical procedures. The wireless standard Bluetooth (4) was used, as investigated in an OR setting (5). High resolution data from the two types of biomedical sensors were collected in customized LabView applications (6) during the surgical procedures and compared in MatLab (6) statistically and sample-by-sample for visual inspection at a sampling rate of 100HZ.

We observed a very high rate of correlation between signal amplitudes of the wireless and wired biomedical sensors during four laparoscopic surgical procedures. This correlation is illustrated in Figure 1.

Small changes in technology for invasive blood pressure measurement have taken place last three decades (7). Transportation of critically ill patients require adequate planning and monitoring during transport (8 -10). Uninterrupted wireless monitoring facilitates intrahospital patient transport. Wireless monitoring replaces cables and reduce the potential risk for adverse events related to disconnection (10). Wireless technology also is battery driven, thus suitable for pre-hospital patient monitoring. Traditional patient monitors are expensive and operate on proprietary platforms, producing analog signals. Processing of digital signals is of great interest in the point of care clinical setting (11). The wireless biomedical sensor prototype represents a low-cost, reliable and flexible alternative to traditional signal transmission and data processing.


Wireless transmission of blood pressure data and EKG signals in the OR is a stable, accurate and simple method with a potential for developing new and cost-effective procedures, and to replace traditional monitoring solutions based on cables.



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(2) Wireless Physiological Pressure Transducer. 2004. Ref Type: Pamphlet

(3) Truwave PX 600F Pressure Monitoring Set. 2004. Edwards Lifesciences Germany GmbH. Ref Type: Pamphlet

(4) Bluetooth. https://www bluetooth org/ 2004 [cited 2004 Oct 30];Available from: URL: https://www.bluetooth.org/

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(11) Celi LA, Hassan E, Marquardt C, Breslow M, Rosenfeld B. The eICU: it's not just telemedicine. Critical Care Medicine 2001 Aug;29(8 Suppl):183-9.

Figure 1: Wired and wireless blood pressure samples.