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A mobile system for precise wireless pulse transit time (PTT) monitoring

: Weder, A.; Pietzsch, M.; Zaunseder, S.; Zimmerling, M.; Netz, S.


Association for Computing Machinery -ACM-, Special Interest Group on Mobility of Systems, Users, Data and Computing:
MobileHealth 2011, First ACM MobiHoc Workshop on Pervasive Wireless Healthcare. Proceedings : In conjunction with MobiHoc 2011 Conference, Paris, May 16 - 19, 2011
New York: ACM, 2011
ISBN: 978-1-4503-0780-2
Art. 8
Workshop on Pervasive Wireless Healthcare (MobileHealth) <1, 2011, Paris>
International Symposium on Mobile Ad Hoc Networking and Computing (MobiHoc) <12, 2011, Paris>
Conference Paper
Fraunhofer IPMS ()

The pulse transit time (PTT) is a parameter which can be used to characterize the functional state of the cardiovascular system. The PTT, which is closely connected to the blood pressure, can be derived from an electrocardiogram (ECG) and a simultaneously recorded photoplethysmogram (PPG) signal. In contrast to conventional non-invasive blood pressure measurements, the PTT can be calculated quasi continuously, giving instant feedback to condition changes. Many proposed systems use cables to connect ECG and PPG sensors. This is sufficient for stationary applications. This paper presents a system for wireless PTT measurements that permits patient mobility and thus makes new application scenarios possible. The main challenge of wireless time synchronization, necessary for precise PTT results, is solved using the IEEE 802.15.4 beacon enabled mode.