By Steffen Leonhardt, Thomas Falck, Petri Mähönen
This e-book comprises papers from the foreign Workshop on Wearable and Implantable physique Sensor Networks, BSN 2007, held in March 2007 on the collage health center Aachen, Germany. themes coated within the quantity comprise new scientific measurements, clever bio-sensing textiles, low-power instant networking, method integration, clinical sign processing, multi-sensor information fusion, and on-going standardization actions.
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Additional info for 4th International Workshop on Wearable and Implantable Body Sensor Networks (BSN 2007): March 26-28, 2007 RWTH Aachen University, Germany (IFMBE Proceedings)
G. room temperature, body position) cause the measurement to be only accomplished by technical personnel. Nowadays electrodes consist of aluminium and are coated with a hydrogel, which both serve as the adhesive of the electrodes on the skin and as an electrolytic medium. The use of gel coating may produce allergic reactions, which limits its long-term use. e. a mild dehydration means only a loss of 5 % of body water ). The system also has to take the influence of external parameters into account.
Even the time spent wearing the electrodes improved the result (what we call coupling time). After about five minutes the behaviour of the electrodes improved and the observed measured impedance reproduces equation 6 better than 7 without the necessity of using gel. This effect was most probably due to sweating underneath. The summary of the calculated parameters Re, Ri, Cm, ECW, ICW and TBW for the measurements with standard BIS-electrodes, textile electrodes with gel and textile electrodes after 5 minutes use (high contact pressure) is shown in table 2.
The textile BIS electrodes and the BIS device where connected using the standard device connectors (“crocodile clips”). The first attempt was done with textile electrodes without gel. The contact pressure of the electrodes on the skin was controlled through elastic bands, which allowed a loose (low contact pressure) and a fixed, but not uncomfortable, position (higher contact pressure). In the second trial, the textile electrodes were wetted with gel normally used for electrocardiographic measurements.
4th International Workshop on Wearable and Implantable Body Sensor Networks (BSN 2007): March 26-28, 2007 RWTH Aachen University, Germany (IFMBE Proceedings) by Steffen Leonhardt, Thomas Falck, Petri Mähönen