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mVITAL: A Standards Compliant Vital Sign Monitor
Abstract
Pervasive care and chronic disease management to reduce institutionalization is a priority for most western countries. The realization of next generation ubiquitous and pervasive healthcare systems will be a challenging task, as these systems are likely to involve a complex structure. Such systems will consist of various devices, ranging from resource-constrained sensors and actuators to complex multimedia devices, supporting time critical applications. This is further compounded by cultural and socio-economical factors that must be addressed for next generation healthcare systems to be widely diffused and used. In this study, the requirements for a vital sign monitoring solution are derived and based on these requirements a standards compliant medical device networking solution is presented. mVITAL is an end-to-end solution based on IEEE-11073 framework. IEEE-11073 defines a family of standards and nomenclature for device communication protocol, data format and logical interface between monitoring station and standard compliant medical devices. mVITAL is not only providing medical sensor networking and vital sign monitoring but also closes the loop by signaling alert messages to the caregiver and allowing pervasive access to vital signs of a patient using smartphones over a heterogeneous network. A role based access control mechanism is developed to limit the access to secure data. The end-to-end delay and the variations in delay for both the sensor data collection and the pervasive access are analyzed. mVITAL is developed as a complementary solution augmenting functionality of a hospital information system and can be loosely coupled with the hospital information system using web services.
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