오영호 C LINICAL D EPLOYMENTS OF W IRELESS S ENSOR N ETWORKS : G AIT

C ONTEXT  Clinical Research Objective  Clinical Research System layout  Clinical Research Requirements  Ethnography and Usage Modeling  Technology Selection Criteria / Selection  Conclusion

C LINICAL R ESEARCH O BJECTIVE Develop new technologies for monitoring, feedback and create new algorithms for early detection of fall risk A disease diagnosis system used in a home environment Identify the key postural and neurocardiovascular characteristics unique to fallers

C LINICAL R ESEARCH S YSTEM LAYOUT

C LINICAL R ESEARCH R EQUIREMENTS  What category of end user will interact with this solution and what is their role?

C LINICAL R ESEARCH R EQUIREMENTS  What subject data needs to be collected?

C LINICAL R ESEARCH R EQUIREMENTS  What parameters need to be measured and at what resolution?

C LINICAL R ESEARCH R EQUIREMENTS  How should files from different subjects and different trials be distinguished? Subject name/ID, Trial name, Date  What data should be displayed in real-time?

E THNOGRAPHY AND U SAGE M ODELING  No subjects were happy to be video-taped on an ongoing basis  Subjects prefer not to wear or carry sensors  White coat syndrome

T ECHNOLOGY S ELECTION CRITERIA / S ELECTION : S ENSOR D EVICE  Full 3-D picture of the movement of each sensor can be developed. → Six degrees of freedom are needed  The sensor device must be small and light  The device must be self-powered and recharged  The device must be able to rapidly collect and transmit data, at high sampling rates

T ECHNOLOGY S ELECTION CRITERIA / S ELECTION : S ENSOR D EVICE What is SHIMMER?  Light & Wearable  Support for Bluetooth and wireless communications  Data Capture – Micro SD Card Storage – 2Gb  Open Platform, driven by TinyOS

T ECHNOLOGY S ELECTION CRITERIA / S ELECTION : S ENSOR D EVICE Available as add-on extension boards and accessories  Kinematics sensing (3 axis Gyroscope)  Advanced Kinematics sensing (3 axis Gyroscope + 3 axis magnetic sensing)  Electrocardiography (ECG)

T ECHNOLOGY S ELECTION CRITERIA / S ELECTION : S ENSOR D EVICE

T ECHNOLOGY S ELECTION CRITERIA / S ELECTION : R ADIO  Must communicate significant amounts of 3-D data in real time  If a home deployment takes place, a lower- power radio stack such as ZigBee/ may be appropriate

T ECHNOLOGY S ELECTION CRITERIA / S ELECTION : F OOTFALL C APTURE

T ECHNOLOGY S ELECTION CRITERIA / S ELECTION :V IDEO  Two video cameras are needed in order to capture all elements of movement  Must interface to the PC running the gait analysis software

T ECHNOLOGY S ELECTION CRITERIA / S ELECTION :S OFTWARE  Real-time analysis of the incoming data  Integrating and displaying the data from sensor, mat, and video sources  Being easily changed and adjusted in response to evolving research aims  Supporting long-term data storage

T ECHNOLOGY S ELECTION CRITERIA / S ELECTION :S OFTWARE What is BioMOBIUS?  Rapid Development (Graphical Development Environment)  Biosignal Processing Applications (Real Time)  Mobile hardware and physiological sensor support  Straightforward user interfaces (GUI Designer)  Reduced Development Replication (Re-use of Blocks)

C ONCLUSION  SHIMMER and the BioMoBIUS saved time, effort and budget  Significant advantages in terms of mobility and domain of application, as well as cost, over the gait sensor mat solution