Open AccessJournal Article
On the way to a cable free operating theater: An operating table with integrated multimodal monitoring
Tobias Wartzek,Robert Elfring,Arne Janssen,Benjamin Eilebrecht,Marian Walter,Steffen Leonhardt +5 more
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TLDR
A novel artifact detection method for capacitive electrocardiogram measurements based on an optical measurement is presented and together with an adaptive threshold based algorithm, intervals with artifacts can reliably be identified resulting in a robust estimation of heart rate.Abstract:
On the way to a cable free operating theater a new operating table is developed featuring into the table integrated sensors for patient monitoring, which do not necessarily need a direct contact to the naked skin, and a magnetic tracking system. The patient monitoring sensors are new multimodal sensors, which combine a capacitive electric field sensor with a reflective optical sensor and a temperature measurement. This multimodal measurement offers the opportunity of a reliable vital sign measurement by use of redundancy and plausibility checks. A novel artifact detection method for capacitive electrocardiogram measurements based on an optical measurement is presented. Together with an adaptive threshold based algorithm, intervals with artifacts can reliably be identified resulting in a robust estimation of heart rate.read more
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Ambient and Unobtrusive Cardiorespiratory Monitoring Techniques
TL;DR: This review provides a systematic and comprehensive review over the current state of the field of ambient and unobtrusive cardiorespiratory monitoring and systematically analyzes similarities and differences between these methods with respect to the physiological and physical effects they sense as well as the resulting implications.
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Noncontact ECG Recording System With Real Time Capacitance Measurement for Motion Artifact Reduction
TL;DR: A system for noncontact ECG recording is proposed that measures the real time electrode-body capacitance concurrently with the ECG as a reference signal for motion artifact reduction and an adaptive least-mean-squares filtering algorithm run on these signals is demonstrated to be able to reduce the severity of certain types of electrode motion artifacts.
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Motion Artifact Quantification and Sensor Fusion for Unobtrusive Health Monitoring
TL;DR: This work presents a multimodal sensor setup integrated into an armchair that combines capacitively coupled electrocardiography, reflective photoplethysmography, two high-frequency impedance sensors and two types of ballistocardiography sensors, and develops and evaluates an optimal combination of sensors and fusion methodology.
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Robust Sensor Fusion of Unobtrusively Measured Heart Rate
TL;DR: Two major results are shown in case of contactless heart rate measurements deduced from a capacitive ECG and optical pulse signals: best results in terms of difference to reference heart rate and temporal coverage can be achieved.
Journal ArticleDOI
UnoViS: the MedIT public unobtrusive vital signs database
Tobias Wartzek,Michael Czaplik,Christoph Hoog Antink,Benjamin Eilebrecht,Rafael Walocha,Steffen Leonhardt +5 more
TL;DR: The development of urgently needed methods for very robust parameter extraction or robust signal fusion in view of frequent severe motion artifacts in unobtrusive monitoring is now possible with the UnoViS database.
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A 2dvEv- bit distributed algorithm for the directed Euler trail problem
Wen-Huei Chen,Chuan Yi Tang +1 more
TL;DR: The algorithm can be used as a building block for solving other distributed graph problems, and can be slightly modified to run on a strongly-connected diagraph for generating the existent Euler trail or to report that no Euler trails exist.
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Dry-Contact and Noncontact Biopotential Electrodes: Methodological Review
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Electric potential probes - new directions in the remote sensing of the human body
TL;DR: It is suggested that in the future ultra-low-noise, ultra-high-input-impedance probes may form the basis of a radically new technology for measuring the dynamics of the human body as well as in non-contact, imaging systems for pre-emptive and diagnostic medicine.
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Insulating electrodes: a review on biopotential front ends for dielectric skin-electrode interfaces.
TL;DR: This analysis yields that noise bounds depend on features of the available devices as current and voltage noise, but the final noise level also depends on parasitic capacitances, requiring a careful shield and printed circuit design.
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Non-invasive continuous core temperature measurement by zero heat flux.
TL;DR: Results indicate that the studied ZHF sensor tracks T(es) very well in hot and stable ambient conditions and may be a promising alternative for reliable non-invasive continuous core temperature measurement in hospital.