A new micro cell chip which can induce stem cells to differentiate into specific body cell types has been designed and fabricated for tissue engineering. This paper presents the fabrication and preliminary test result...
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Coronary artery disease (CAD) is one of the major causes of death. Therefore recurrent monitoring of arterial condition is important. The photoplethysmography (PPG) is simple and cost effective technique to measure bl...
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We proposed two unconstrained methods for blood pressure monitoring in a ubiquitous home healthcare. Instead of a conventional oscillometric method, unconstrained pulse arrival time was used. Pulse arrival time is the...
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We proposed two unconstrained methods for blood pressure monitoring in a ubiquitous home healthcare. Instead of a conventional oscillometric method, unconstrained pulse arrival time was used. Pulse arrival time is the time delay between Electrocardiogram (ECG) and Photoplethysmogram (PPG). In first method, ECG and PPG could be unconstrainedly obtained in a computer desk environment. In second method, ECG and PPG could be measured in a toilet seat unconstrainedly. The relationship between systolic blood pressure and pulse arrival time was investigated with several experiments. Additionally, the potential of pulse arrival time for blood pressure monitoring was validated in a practical application in a daily life. It showed that these methods were useful for the long term monitoring in a telemedicine.
Wireless networked multisite triaxial accelerometry system was proposed to estimate activity energy expenditure during daily life. Proposed system used different estimation algorithms according to activity classificat...
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For ubiquitous healthcare, interests for unconstrained method for ECG measurement have increased in the biomedicalengineering field. Recently, capacitivecoupled method was introduced as the unconstrained method. Howe...
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For ubiquitous healthcare, interests for unconstrained method for ECG measurement have increased in the biomedicalengineering field. Recently, capacitivecoupled method was introduced as the unconstrained method. However, the ECGs obtained from this method have many motion artefact noises, so heart rate data becomes intermittent finally. In this paper, spectral analysis methods of heart rate variability (HRV) for intermittent heart rate (HR) data are compared through simulation of artificial and real intermittent HR data. As the index of comparison, LF/HF ratio is used, which is a parameter reflecting the sympatho-vagal balance. In conclusion, the Burg's algorithm of parametric method has the lowest error, and the Lomb-Scargle (LS) periodogram of uneven method has the worst result. But, in low intermittent number, LS periodogram is the best.
It is widely known that autonomic Nervous System (ANS) is one of the indices to indicate the wakefulness of person. Therefore measuring the biosignals relating with the ANS during sleep is required to evaluate sleep q...
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When an emergent case occurs, to give proper and immediate emergency treatment to a patient is as important as to transfer him or her to the hospital as early as possible. For this circumstance where first aid usually...
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Polysomnography is the standard method to score the sleep stages or to determine the quality of sleep. During all night examination, subjects must attach complicate and numerous electrodes on their body to acquire the...
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An accurate segmentation of solid nodules in ultrasonographic (US) breast image is presented. 1-level 2-dimensional Discrete Wavelet Transform (DWT) is used to create features reflecting the texture information of the...
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