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Millions of people worldwide live with type 1 diabetes, a potentially devastating disease with no known cure. People who have type 1 diabetes do not produce insulin in their pancreas, so they must constantly monitor their blood sugar levels while balancing food intake against insulin intake. It’s a mentally taxing, painful process that must be repeated throughout the day.
A collaboration between Associate Professor Babak Parviz at the University of Washington (UW) and Microsoft Senior Researcher Desney Tan is focused on developing a non-invasive, technological solution that promises to improve both the health and overall quality of life for people with diabetes: a contact lens that monitors blood glucose levels. The functional lens technology is representative of a trend in technology known as Natural User Interface (NUI).
NUI technology has the potential to provide user benefits without being obvious to others or intrusive to the user. We believe it has tremendous potential in the healthcare industry, where technology is a necessary, but not always pleasant, part of a patient’s diagnosis or care. The functional contact lens is an excellent example of how NUI can change patient monitoring from “snapshots” of information to continuous health monitoring that could potentially improve the wearer’s overall health—especially for those with a chronic disease, such as diabetes.
Today, people with type 1 diabetes use needles to draw blood from their fingers multiple times throughout the day—every day, including meal times—to check their blood glucose levels. By monitoring their glucose levels, they can more easily ensure that they maintain an acceptable glucose level, which is critical to optimal health and longevity for diabetes patients.
The Daily Impact of Diabetes
Daily, repeated blood draws are a painful necessity for people with diabetes. This process has limitations because the monitoring is only periodic. Diabetics may experience glucose fluctuations that require correction—for example, by increasing insulin intake or eating a piece of candy to raise their blood sugar level—anytime of the day. Regular glucose monitoring, in addition to sensible dietary choices, are part of daily life for Kevin McFeely, who was diagnosed with type 1 diabetes 30 years ago, and his two young children, who also have diabetes.
“If I don’t check my blood sugar, or my children don’t check their blood sugar daily, there are some different things that could potentially happen,” he explained. “If my blood sugar gets too high, I have noticed that my vision begins to blur, I begin feeling nauseous, very, very tired, and just almost physically sick. And potentially, if I let that go, I could pass out from having high blood glucose.”
Low blood sugar also presents a danger to people with diabetes. If glucose falls too low, a diabetic may begin to sweat, suffer an elevated heart rate, and potentially lose consciousness. So it is critical that diabetics monitor their blood glucose on a regular basis throughout the day. McFeely’s children, who are ages seven and ten, are responsible for managing their disease and monitoring themselves at school throughout the day.
“I’m used to testing myself six to eight times per day. I’ve been doing it for 30 years,” McFeely says. “But boy, when I think about my children… I mean, you have a spring-loaded needle that’s coming into your finger, and it hurts them. I can see their faces [when they test], and I can see them cringe.”
A New Approach to Monitoring Health
As envisioned, the lens would be worn daily, just like regular contact lenses. But instead of, or in addition to, correcting vision, the lens would monitor the wearer’s glucose level through their tears. Much of the information that can be obtained through blood testing is also accessible on the surface of the eye. The functional lens is being designed to sample eye fluid, analyze it, and transmit the information to a reporting machine. A tiny radio transmitter embedded in the lens will handle the information transfer.
Parviz’s team at UW has built a variety of contact lenses with small radios and antennas built in, enabling them to draw power as well as send and receive information through radio frequencies. Also, the UW team has been able to place a glucose sensor on the contact lens and demonstrate that it can detect glucose at levels that are found in the tear film. The goal is to unite these elements to develop a contact lens that constantly monitors the blood glucose level and records information that can be accessed later by the patient’s doctor.
McFeely is hopeful that technology, like the functional contact lens, can improve the monitoring and care options available to his children. “Thinking about the functional contact lens for my children who are both type 1 diabetic—I think that would be incredible,” he said. “Given that my children are diagnosed at such a young age, it does have the potential to help them live a longer, healthier life.”
Visualizing Future Applications
Ideally, the lens will do more than just record information. The UW team envisions a way to automatically display important information—including abnormal glucose or insulin alerts—in the lens wearer’s view. It could alert the wearer when they should stop eating due to glucose levels, or remind them when it’s time to get a snack. This real-time feedback would empower the user to react quickly, avoiding health-threatening or uncomfortable episodes. The visual information would be dormant the rest of the time, adhering to the NUI idea of being unobtrusive until needed.
Once fully developed, the technology could be used to replace virtually any screening or diagnostics that currently depend upon blood draws. Additionally, the researchers who are involved in the project envision a future in which contact lenses deliver medicine directly into the bloodstream through the cornea.
—Kristin Tolle, Director, Natural User Interface, Microsoft Research Connections
For baby boomers who grew up watching The Jetsons, the idea of the fully automated home was the futuristic stuff of cartoons. Today, the technology is available to make a Jetsonesque home a reality, by using inexpensive network devices that remotely control locks, lights, thermostats, cameras, and motion sensors. In theory, we should be able to monitor our home security cameras remotely from a smartphone or customize the climate of each room based on occupancy patterns. In practice, however, the high overhead of managing and extending home automation technology has restricted such “smart home” scenarios to expert hobbyists, who enjoy grappling with the technical challenges, and the wealthy, who can hire someone to handle the tech chores.
HomeMaestro: a platform that helps end users program their home appliances
To simplify the management and development of smart-home applications, Microsoft Research has developed HomeOS. When coupled with smartphones and cloud services (by using Project Hawaii and Windows Azure), HomeOS makes the smart home a reality for the rest of us. Unlike past home technology models, which rely either on an “appliance abstraction,” in which a closed, monolithic system supports a fixed set of tasks over a fixed set of devices, or a “network of devices abstraction,” in which a decentralized collection of devices relies on interoperability protocols, our HomeOS provides users and developers with a PC-like abstraction. It presents network devices as peripherals, enables cross-device tasks via applications, and gives users a management interface that is designed for the home environment. By so doing, the HomeOS overcomes the extensibility limitations of the appliance model and the manageability hassles of the network of devices model. At the same time, it brings the “app store” to the home environment, allowing users to extend the functionality of their home by downloading applications.
To date, the HomeOS research prototype has been running in more than a dozen homes. We’ve also made it freely available to academic institutions for teaching and research purposes. Nearly 50 students, across several institutions, have already built some exciting applications for HomeOS.
For example, HomeMaestro from the MIT Media Lab shows the power of the HomeOS approach. HomeMaestro is a platform for intuitively defining home appliance behavior. The key concept in HomeMaestro is a repository of rules defined by other users, which can be mashed into interesting scenarios. These rules could be simple if-then statements, such as “if my bedroom window is open, then switch off the heater.” The rules can be defined on Windows Phone 7 and uploaded to the cloud (Project Hawaii web services and Windows Azure) for later use and sharing.
In another example, students at the University of Washington recently used HomeOS with Windows Phone 7 and cloud services (from Project Hawaii) to create a door-monitoring system and networked alarm, and to control various home devices using the Kinect sensor.
Student demos of HomeOS applications
You can check out some potential applications of the HomeOS in these student demos. A paper describing HomeOS will be presented at the 9th USENIX Symposium on Networked Systems Design and Implementation (NSDI '12), which runs from April 25 to 27, 2012, in San Jose, California.
With HomeOS, we feel we’re on the way toward that Jetson home—now, if only we could make George Jetson’s nine-hour workweek a reality!
—Arjmand Samuel, Senior Research Program Manager, Microsoft Research Connections
On Monday, March 18, 2013, Microsoft rolled out the latest release of the Kinect for Windows software development kit (SDK). This represents the largest update to the technology since the SDK was first commercially released in February last year, and it includes the Kinect Fusion technology that originated in Microsoft Research.
Kinect Fusion, an implementation of Microsoft Research’s 3-D surface reconstruction technology, can create highly accurate 3-D renderings of people and objects in real time.
The new release has a number of features that will benefit the academic and research community:
Another helpful development: earlier this month, Kinect for Windows announced broader availability of academic pricing through Microsoft Authorized Educational Resellers (AERs). Most of these resellers can now offer academic pricing directly to educational institutions; academic researchers; and students, faculty, and staff of public or private K-12 schools, vocational schools, junior colleges, colleges, universities, and scientific or technical institutions. Academic pricing on the Kinect for Windows sensor is currently available through AERs in the United States, Taiwan, and Hong Kong SAR. We eagerly look forward to a seeing what the academic community does with the new features!
—Stewart Tansley, Director, Microsoft Research Connections—Kenji Takeda, Solutions Architect and Technical Manager, Microsoft Research Connections EMEA