Stanford Wireless Cardiac Device Powered by Radio Waves, Not Batteries
September 4, 2012 6:16 PM
Power delivery to the human heart from a 200MHz low-frequency transmitter (left) and a 1.7GHz high-frequency transmitter (right)
This could eliminate large pacemaker batteries that don't last forever
engineers have created a tiny, wireless cardiac device that can easily be implanted in the chest.
The Stanford researchers, including study leader Ada Poon and doctoral candidates Sanghoek Kim and John Ho, developed a cardiac
that is wirelessly powered by radio waves outside of the body instead of depending on a battery.
What's the problem with batteries? They're large -- often the largest part of a pacemaker device. Also, they don't last forever, so patients
must have surgery
to replace it when the battery stops working.
The new Stanford cardiac device is only eight-tenths of a millimeter in radius. This makes it non-invasive, and easy to place in the human chest. The device combines radiative and inductive transmission of power, allowing a transmitter to send radio waves to a coil in the body. An electrical current is created in the coil, which powers the tiny implant.
This particular wireless device is beating the odds, because electric fields dissipate in human tissues and scientists long thought that high frequency radio waves needed low-frequency transmitters and huge antennas in order to make implantable devices work. But Poon found another way: radio waves move in alternating waves of magnetic and electric fields, allowing high-frequency signals to penetrate human tissues much deeper.
With a 1.7 GHz high-frequency transmitter, the top power transfer through human tissue was able to hit about 1.7 billion cycles per second. This is 10 times that of current devices.
Challenges still lie ahead; such as problems with tissue heating and antenna placement for maximum efficiency (which could significantly reduce power if aligned incorrectly), but the new device is a promising step toward advanced, wireless pacemakers that are both small and powerful.
"And boy have we patented it!" -- Steve Jobs, Macworld 2007
Stanford Researchers Develop Wireless Retinal Implant
May 15, 2012, 12:55 PM
Stanford Creates Wireless, Self-Propelling Medical Implant
February 23, 2012, 1:03 PM
Device Successfully Used as Alternative to Open-Heart Surgery
February 4, 2011, 1:01 PM
PIQ ROBOTTM reveals its new artificial intelligence software
November 29, 2016, 12:59 AM
One more time - Happy Thanksgiving to Everyone Around the World
November 24, 2016, 4:00 AM
Google’s Smart Contact Lens Project gets halted for 2016
November 20, 2016, 7:00 AM
Cell Research Study shows African Americans have greater immune response to infection
November 10, 2016, 1:00 AM
UTHealth Clinical Trial Shows Progress Using Stem Cells to Treat Traumatic Brain Injury
November 8, 2016, 1:00 AM
Uber Partners with Circulation to Pilot Program Connecting Transportation and Digital Health Care
November 6, 2016, 5:00 AM
Most Popular Articles
Sales Battle - Apple iPad Mini vs Samsung Galaxy Tab
November 29, 2016, 12:36 AM
Phillips 55’ 4K Smart TV – Is This Really a Deal? We Think So.
November 25, 2016, 9:44 AM
PlayStation 4 Pro – 4K Console for 4K TVs
November 28, 2016, 1:00 AM
Lenovo Yoga 900 and Lenovo Yogo 900S – Powerful Performance in an Ultra-Thin Packages
November 27, 2016, 5:00 AM
Best Phones of 2016 - Priced under $650.00
November 27, 2016, 5:00 AM
Latest Blog Posts
Dec 4, 2016, 5:00 AM
Dec 3, 2016, 5:00 AM
Dec 2, 2016, 5:00 AM
Surface Ergonomic Keyboard
Dec 1, 2016, 3:01 AM
Chapeconense plane crash: Football rallies around Brazilian Team
Nov 30, 2016, 1:00 AM
How to Extends Your iPhone’s Battery Life
Nov 29, 2016, 12:49 AM
Nov 28, 2016, 1:12 AM
News: Fidel Castro
Nov 27, 2016, 5:00 AM
Nov 26, 2016, 5:00 AM
Changes in Social status affect the way genes turn on and off within immune cells.
Nov 25, 2016, 5:12 AM
Austrian far–right hopeful Hofer may back EU vote.
Nov 24, 2016, 4:00 AM
Final Fantasy XV Leaked Before Nov 29 Launch Date
Nov 23, 2016, 1:00 AM
Nov 22, 2016, 2:26 AM
Nov 21, 2016, 1:00 AM
HTC Makes Big Moves in China
Nov 20, 2016, 2:00 AM
Do you know who is the number one company in the word?
Nov 19, 2016, 5:30 AM
Foldable Cardboard ”EcoHelmet” wins James Dyson Award’s Top Prize
Nov 18, 2016, 2:39 AM
Scientists Discover Roundest Object Ever Spotted in Universe
Nov 17, 2016, 1:00 AM
Smallest Device Lets You Print Almost from Anywhere
Nov 16, 2016, 9:32 AM
Cancer Screening in the Community Is there a link between Cancer and Poverty?
Nov 15, 2016, 8:00 AM
More Blog Posts
Copyright 2016 DailyTech LLC. -
Terms, Conditions & Privacy Information