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General biophysics --- Human biochemistry --- Surgery --- biologische materialen --- medische biochemie --- wearables --- biochemie --- chirurgie

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This book talks about photoplethysmography (PPG) techniques based on computer-aided data processing. In particular, it presents the results of a co-operative Indo-German project on the topic between Indian Institute of Technology at Chennai and RWTH Aachen University. Measuring system design, experimental details and some preliminary results obtained so far within the framework of this project are presented here. From the investigations carried out so far using the PPG sensors in conjunction with breathing sensors, it has been possible to monitor the 0.125 to 0.15 Hz rhythms in the arterial volumetric changes and to study the influence of breathing on them. These rhythms, which according to medical experts have relevance to psychosomatic conditions e.g. stress or relaxation, can also be addressed to by ancient Indian practices like yoga and meditation. This book presents the results of studying the effects of Indian relaxation techniques like pranayama, meditation, etc. in comparison to western relaxation techniques like autogenic training. So far it has been established that the Indian techniques of relaxation like yoga and meditation are very effective in generating low frequency rhythms in the skin perfusion as monitored by optical sensors. According to medical experts, these low frequency rhythms have a very important bearing on the human physiology and have potential therapeutic implications. This book is meant to provide an overview of the current state-of-knowledge and encourage the next generation of scientists/engineers to carry this work forward, especially on the novel PPG application fields that are of growing importance like pain and stress assessment, detection of peripheral venous saturation and local arterio-venous oxygen consumption as well as contactless space resolved skin perfusion studies with modern camera based PPG technology.

General biophysics --- Human biochemistry --- Physical methods for diagnosis --- Biotechnology --- medische biochemie --- biofysica --- bio-engineering --- biotechnologie --- radiologie

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The International Workshop on Wearable and Implantable Body Sensor Networks (BSN 2007) was held from 26th to 28th March, 2007 at the University Hospital Aachen, Germany. BSN 2007 is the fourth in the series of successful workshops launched three years ago at Imperial College in London. After the event was hosted by MIT in Boston last time, BSN 2007 returned to Europe and for the first time organized jointly with academia (RWTH Aachen University) and industry (Philips Research Europe, Aachen). The last decade has witnessed a rapid surge of interest in new sensing and monitoring devices for healthcare and the use of wearable, implantable and ambient devices for medical applications. The papers presented at BSN 2007 by leading scientists from computing, biotechnology, engineering and medicine address general issues related to on-body and in-body sensors. They discuss the latest technical developments and highlight novel applications of body-sensor networks in clinical settings, at home and on-the-move. Topics covered include new medical measurements, smart bio-sensing textiles, low-power wireless networking, system integration, medical signal processing, multi-sensor data fusion, and on-going standardization activities.

Sensor networks --- Biomedical engineering. --- Biomaterials. --- Surgery. --- Biomedical Engineering and Bioengineering. --- Surgery, Primitive --- Medicine --- Biocompatible materials --- Biomaterials --- Medical materials --- Biomedical engineering --- Materials --- Biocompatibility --- Prosthesis --- Clinical engineering --- Medical engineering --- Bioengineering --- Biophysics --- Engineering --- Bioartificial materials --- Hemocompatible materials --- Biomaterials (Biomedical materials)