Several test environments have been utilized:
Human Powered Centrifuge
The LifeGuard I system was tested on the Human Powered Centrifuge at NASA Ames. The Human Powered Centrifuge or "Space Cycle" was developed as a research tool to provide exercise and gravitational forces simultaneously using only human effort to obtain physiological, psychological and human performance data. Test subjects wearing CPOD units were pedaling and their vital signs were transmitted wirelessly to a Blutetooth access point and from there to a Bluetooth-equipped laptop in a nearby monitoring room. The vital signs could be monitored in real-time, but were also locally logged on the CPOD. The capability of the CPOD to measure 3-axis acceleration data proved to be very useful in this study. The data collected was later compared to the data collected by the original centrifuge equipment.
The NASA Extreme Environment Mission Operations, a cooperative project between NASA and the National Oceanic and Atmospheric Administration (NOAA), was the first large-scale NASA deployment of LifeGuard. NEEMO missions are frequently used to evaluate new equipment for potential use on Shuttle or Station. The LifeGuard system was tested during the “NEEMO V” mission in June 2003. The test protocol included exercise tests, remote diagnostic of recorded data, and a test to determine the range of the Bluetooth link. The astronauts who tested the system provided valuable feedback which was subsequently used to implement a number of improvements.
Mt. St. Helens, Washington
This climb tested the effectiveness of a series of design changes implemented after a previous Mt. Adams field test. These included a more optimized analog front end circuit, shorter ECG leads, different electrodes, the replacement of the waist belt by an Amphipod fanny pack, and a firmware upgrade. Seven CPODs were tested and 9 hours of good data were obtained from every single unit.
KC-135 Field Test
The goal of this experiment was to demonstrate the feasibility of using a novel wearable, wireless physiological monitoring device (Lifeguard) on subjects during parabolic flight profiles (micro gravity and hyper gravity) onboard the KC-135. The primary objective was to determine whether traditional vital signs (ECG, temperature, heart rate, respiratory rate, O2 saturation, and blood pressure) and activity can be correlated with gravitational and environmental changes to evaluate ease-of-use in an altered gravitational environment. The reliability of the Lifeguard system to assess a range of physiologic parameters during microgravity and hypergravity, and during the transitions to these altered g-force states was successfully demonstrated. The CPOD device reliably logged data of all subjects, and the feasibility of Bluetooth streaming could be validated as well. The Bluetooth link functioned flawlessly over an even greater range than expected for a high-noise, "metal-can" environment like the KC-135. The base station laptop located at the end of the KC-135, near the seats, was able to receive data from a subject near the front of the plane.
|Mission||Launch/Start Date||Landing/End Date||Duration|
|NEEMO 6||07/12/2004||07/21/2004||10 days|