Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài:Reduction of motion artifact in pulse oximetry by smoothed pseudo Wigner-Ville distribution | Journal of NeuroEngineering and Rehabilitation BioMed Central Research Open Access Reduction of motion artifact in pulse oximetry by smoothed pseudo Wigner-Ville distribution Yong-sheng Yant Carmen CY Poon and Yuan-ting Zhang Address Joint Research Center for Biomedical Engineering The Chinese University of Hong Kong Shatin Hong Kong Email Yong-sheng Yan - ysyan@ Carmen CY Poon - cpoon@ Yuan-tingZhang - ytzhang@ Corresponding author fEqual contributors Published 01 March 2005 Received 20 January 2005 Journal of NeuroEngineering and Rehabilitation 2005 2 3 doi 1743-0003-2-3 Accepted 01 March 2005 This article is available from http content 2 1 3 2005 Yan et al licensee BioMed Central Ltd. This is an Open Access article distributed under the terms of the Creative Commons Attribution License http licenses by which permits unrestricted use distribution and reproduction in any medium provided the original work is properly cited. Abstract Background The pulse oximeter a medical device capable of measuring blood oxygen saturation SpO2 has been shown to be a valuable device for monitoring patients in critical conditions. In order to incorporate the technique into a wearable device which can be used in ambulatory settings the influence of motion artifacts on the estimated SpO2 must be reduced. This study investigates the use of the smoothed psuedo Wigner-Ville distribution SPWVD for the reduction of motion artifacts affecting pulse oximetry. Methods The SPWVD approach is compared with two techniques currently used in this field . the weighted moving average WMA and the fast Fourier transform FFT approaches. SpO2 and pulse rate were estimated from a photoplethysmographic PPG signal recorded when subject is in a resting position as well as in the act of performing four types of motions horizontal and vertical movements of the hand and bending and pressing motions of the finger.
