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Traditional physiological monitoring system is subject to the computer side of the connection allows subjects to be restrict mobility, and only a single physiological measurement of personal information, people can not create multi-channel system architecture. In view of this, the present paper to replace the wireless transmission of physiological signal transmission cable, and the design of multiple-channel system for monitoring and recording physiological signals to achieve a long-term to observe the possible cause of the potential, and physicians to provide professional analysis.
Machine is based on the general transmission of oxygen saturation measurement probe can only be applied to a specific location, easy to shift off a long-term measurement and other shortcomings of the discomfort. Therefore, this paper also design innovative style gloves oxygen saturation machines, not only to resolve the above issues, but also to enhance comfort when wearing and convenience and to avoid the impact of external light source, and can also be applied to achieve the purpose of home.
Synchronous multi-channel monitoring system by the user unit, the central control unit, the monitoring system unit combination. The user unit of the gloves oxygen saturation for the self-developed machine-type, mainly PPG physiological and SpO2 information through the Bluetooth transmission to a central control subsystem side. Central control unit is a combination of a number of subsystems from the side (Slave) systems, as well as all sub-system responsible for receiving information on the main client (Master) system, a combination of the unit. Central control unit can provide multiple channels of user units measurements recorded at the same time, all channels physiological information storage and display waveforms to monitoring system unit . The central control unit can be stored to SD / MMC for physiological information , so that the entire multi-channel monitoring system for the application of more flexible use.
Gloves measurement probe position is different from the transmission probe, the light in tissue is not the same path, is unable to get oxygen saturation simulator calibration curve standards. Therefore measured 40 subjects and Nellcor oxygen saturation measuring machine as the standard calibration curve obtained. At the same time at different positions of the experimental value is to explore the impact of oxygen.
In multi-channel monitoring system for measurement of the five user units through Bluetooth transmission to a central control unit, within 10 meters of the data transmission rate is 100% correct.
Without taking into account the location of the case of oxygen into the value of calibration curve obtained by correlation to 0.59, with an average error of 1.075 ± 0.83%. Results show that the calibration curve at different positions are different, therefore the best place to seek correction of a curve, and correlation to 0.9163, with an average error of 0.37 ± 0.49%. Measured in 36 normal subjects of the correlation of 0.8083, with an average error of 0.485 ± 0.51%.
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