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13 July 2007 Miniaturized pulse oximeter sensor for continuous vital parameter monitoring
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A miniaturized photoplethysmographic sensor system which utilizes the principle of pulse oximetry is presented. The sensor is designed to be implantable and will permit continuous monitoring of important human vital parameters such as arterial blood oxygen saturation as well as pulse rate and shape over a long-term period in vivo. The system employs light emitting diodes and a photo transistor embedded in a transparent elastic cu. which is directly wrapped around an arterial vessel. This paper highlights the specific challenges in design, instrumentation, and electronics associated with that sensor location. In vitro measurements were performed using an artificial circulation system which allows for regulation of the oxygen saturation and pulsatile pumping of whole blood through a section of a domestic pig's arterial vessel. We discuss our experimental results compared to reference CO-oximeter measurements and determine the empirical calibration curve. These results demonstrate the capabilities of the pulse oximeter implant for measurement of a wide range of oxygen saturation levels and pave the way for a continuous and mobile monitoring of high-risk cardiovascular patients.
© (2007) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Jens Fiala, Stephan Reichelt, Armin Werber, Philipp Bingger, Hans Zappe, Katharina Förster, Rolf Klemm, Claudia Heilmann, and Friedhelm Beyersdorf "Miniaturized pulse oximeter sensor for continuous vital parameter monitoring", Proc. SPIE 6633, Biophotonics 2007: Optics in Life Science, 663313 (13 July 2007);


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