Proceedings ArticleDOI
Photoplethsymography for non-invasive diagnostics
V. Jagadeesh Kumar,Vladimir Blazek +1 more
- pp 1-6
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TLDR
This paper traces the path of advancement of this technique and highlights the research outcomes of an "Indo German" collaborative research between Indian Institute of Technology Madras, Chennai, India and Technical University Aachen, Germany funded by ministry of science (BMBF), Germany.Abstract:
Photo-plethysmo-graphy (PPG) is a noninvasive method of obtaining a signal proportional to blood volume changes using light. From the initial trials seven decades back, the PPG technique has grown leaps and bounds and today its application has become indispensible not only during surgical procedures but also in patient monitoring in critical care environment. This paper traces the path of advancement of this technique and highlights the research outcomes of an "Indo German" collaborative research between Indian Institute of Technology Madras, Chennai, India and Technical University (RWTH) Aachen, Germany funded by ministry of science (BMBF), Germany, Research projects funded by Department of Science and Technology and Department of Biotechnology, Government of India.read more
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TL;DR: The principles of pulse oximetry are reviewed, with an eye toward recognizing the limitations of this tool, which include performance limitations in the settings of carboxyhemoglobinemia, methemoglobeinema, motion artifact, hypotension, vasoconstriction, and anemia.
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TL;DR: The theoretical background behind this advanced technology, instrumentation requirements, practical instrument calibration, common features of commercial pulse oximeters, specific clinical applications, and performance limitations of pulse oximeter are reviewed.
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TL;DR: The pulse oximetry technique, by focusing on the pulsatile arterial component, neatly circumvented many of the problems of the classic nonpulse arterial approach and owes a good measure of its success to the technologic advances in light emission and detection and the ready availability of microcomputers and their software.