Home Is Where the Heart Monitor Is

Medical devices, products and technologies are converging to revolutionize home- and self-care health systems in the United States, making it possible for people to play a greater role in maintaining their own health.

For consumers, this could mean convenience in time and travel and reduced health-care costs, and--it is hoped--result in home-care systems that teach people to monitor themselves with gizmos that give timely warnings of illness so that they can turn to their physicians early--when intervention will do the most good. For doctors, it could mean more efficient--and effective--health care driven by patients who take greater responsibility for their own health.

William Herman, director of the division of physical sciences in the Food and Drug Administration's Center for Devices and Radiological Health (CDRH), which regulates medical devices, calls home-care systems "the fastest growing segment of the medical device industry."

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`If You Build It, They Will Come'

The list of planned and imagined medical devices reads like a work of science fiction. For example, imagine a toothbrush with a biosensing chip that checks your blood sugar and bacteria levels while you're brushing your teeth. Optimally, the brush would come with a holder that would transmit information to a database containing the person's medical file. Other devices on the drawing board include computerized eyeglasses with a tiny embedded display that can help those who wear them to remember people and things, and skin surface mapping, a new imaging technology that can collect images of the skin surface over time and would enable people predisposed to melanoma to detect malignant moles as soon as they begin to develop.

Also in the future, hand-held biosensors resembling the technological gadgets wielded by "Bones" on the TV series Star Trek could eliminate the need for maintaining large laboratories. A "smart" bandage could be made of fiber that could detect bacteria or virus in a wound, and tell the wearer if treatment with antibiotics is warranted and which to use. Using a wide range of advanced technologies such as wireless electronics and digital processing, heart monitors that can be connected to personal computers could make it convenient for people to track their own heart rates and other vital information at home and then transmit it to their health-care providers.

The Defense Advanced Research Projects Agency, within the U.S. Department of Defense, has developed a wearable system called the "smart T-shirt," which successfully monitored the vital signs of climbers on a recent expedition to Mount Everest. Another type of device that allows people with disabilities to operate machines and perform routine tasks is a hands-free instrument that is controlled by small muscle movements, such as a blink of an eye (electromyography), and brain activity (electroencephalography). Other devices include those controlled by tracking eye movements or by speech recognition technology. Devices that offer this kind of assistance show promise for individuals with spinal cord injuries or other nervous system disorders resulting in paralysis.

Products well along in the development pipeline are about to make possible dramatically improved pacemakers, cochlear implants (for hearing), and medicine delivery systems. Some of these devices will incorporate the most advanced product design and manufacturing on a molecular scale (nanotechnology) and other state-of-the-art technologies, such as microprocessors and miniaturization. The ability to bring these kinds of tools into the home adds a dimension of health care that people never had access to in the past.